Showing posts with label heavy rain. Show all posts
Showing posts with label heavy rain. Show all posts

Tuesday, December 14, 2010

Storm Cell NW of Eugene moving East

National Weather Service is tracking a storm cell north-west of Eugene, moving eastward. Warning posted below:

SHORT TERM FORECAST
NATIONAL WEATHER SERVICE PORTLAND OR
228 PM PST TUE DEC 14 2010

ORZ004-008-142330-
SOUTH WILLAMETTE VALLEY-CENTRAL COAST RANGE OF WESTERN OREGON-
228 PM PST TUE DEC 14 2010

.NOW...
AT 225 PM PST NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN
ISOLATED POSSIBLY STRONG THUNDERSTORM OVER HORTON...OR ABOUT 23 MILES
NORTHWEST OF EUGENE...MOVING EAST AT 35 MPH. OTHER LOCATIONS IMPACTED
BY THIS POSSIBLY STRONG THUNDERSTORM THROUGH 330 PM PST INCLUDE
UNCTION CITY...EUGENE AIRPORT...HARRISBURG. HAIL...VERY HEAVY
RAIN...GUSTY WINDS UP TO 40 MPH...AND DANGEROUS LIGHTNING CAN BE
EXPECTED IN THESE AREAS. HEAVY HAIL MAY ACCUMULATE ON ROADWAYS.

Wednesday, June 2, 2010

INCREASED POTENTIAL FOR DEBRIS FLOWS IN CASCADES, COAST RANGE

Posted: June 1st, 2010 10:19 PM

THE NATIONAL WEATHER SERVICE HAS ISSUED A SPECIAL WEATHER STATEMENT ADVISING RESIDENTS AND TRAVELERS IN THE COAST RANGE AND THE CASCADES OF HEAVY RAIN FOR THE NEXT 2 DAYS. THE HEAVY RAIN ON SNOW WILL CAUSE THE INCREASED POTENTIAL FOR DEBRIS FLOWS FROM THE LARGE AMOUNTS OF RAIN.

DEBRIS FLOWS ARE DANGEROUS, RAPIDLY MOVING LANDSLIDES. STEEP SLOPES, CANYONS, GORGES AND THE MOUTHS OF MOUNTAIN STREAMS ARE THE LOCATIONS AT GREATEST RISK. PERSONS THAT LIVE OR MAY TRAVEL THROUGH THESE LOCATIONS SHOULD BE ALERT TO THE POSSIBILITY OF DEBRIS FLOWS DURING OR SHORTLY AFTER PERIODS OF INTENSE RAINFALL.

Care should be taken when traveling over the mountains during this time. The most dangerous places include:
• Canyon bottoms, stream channels, and areas of rock and soil accumulation at the outlets of canyons;
• Bases of steep hillsides;
• Road cuts or other areas where slopes of hills have been excavated or over steepened;
• Places where slides or debris flows have occurred in the past.

"Debris flows are rapidly moving landslides that can destroy everything in their paths," said James Roddey, Earth Science Information Officer for the Oregon Department of Geology and Mineral Industries (DOGAMI). "They can easily travel a mile or more, depending on the terrain. They'll contain boulders and logs and transport those in a fast-moving soil and water slurry."

"People want to know what they should do when they hear about the potential for debris flows and landslides," said Roddey. "Some areas are more hazardous than others when the danger of landslides is high. People know that if there's a flood warning, they should stay away from the river. We also want them to start thinking about staying away from steep slopes during intense rainstorms. Knowing ahead of time where the danger areas around your home for potential landslides might be is the first step in being prepared," explains Roddey.

Roddey recommends several steps:
• Stay alert. Listen to the radio, TV, or a weather radio for flood watches, which include the potential for debris flows and if told to evacuate, do so immediately;

• Listen for unusual sounds that might indicate moving debris, such as trees cracking or boulders knocking together. A trickle of falling mud or debris may precede larger landslides;

• If you think there is danger of a landslide, leave immediately;

• If water in a river or stream suddenly turns muddy or the amount of water flowing suddenly decreases or increases, this is a warning that the flow has been affected upstream. You should immediately leave the area because a debris flow may soon be coming downstream;

• Assume highways are not safe. Be alert when driving, especially at night. Don't overdrive your headlights. Embankments along roadsides may fail, sending rock and debris onto the road;

• Landowners and road managers should check road drainage systems and conduct needed maintenance in case the predicted heavy precipitation does occur.

Cleaning up after landslides can also be hazardous. "When it's this wet outside, people need to be careful when they're cleaning up the mess. A small mudslide can actually be part of a larger landslide," explains Roddey. "Cleanup should not be done until after the storm."

The official statement from the National Weather Service can be found at: http://www.weather.gov/alerts/or.html

Saturday, January 16, 2010

Storm System to Hit North California and South Oregon

A series of winter storms are expected to batter California starting Sunday, and local forecasters say there likely will be significant amounts of rain and gusty winds in Southern Oregon and the Siskiyou Mountains, too.

National Weather Service forecasters in Medford said the weather system is expected to bring inches of rain and feet of snow to much of California, and it's large enough to reach at least as far north as the Siskiyous. Snow levels should be low enough to bring generous amounts of new snow to Mount Ashland and especially Mount Shasta.

A weather service advisory issued Friday in Sacramento spoke of "virtually a storm a day" from Sunday through next Friday, which could bring as much as 10 feet of snow in higher elevations of the Sierras by the end of next week.

The wet weather is expected to persist in the Siskiyous at least through Thursday, meteorologist Brett Lutz said.

You can read the whole article at http://m.mailtribune.com/apps/pbcs.dll/article?AID=/20100116/NEWS/1160307&template=wapart


Monday, December 7, 2009

Weathering the Winter Season - know the terms

Weathering the Winter Season
It’s important to understand the differences behind National Weather Service’s advisories, watches and warnings.

An advisory is a “heads-up” that conditions are likely for dangerous weather. Advisories are issued when weather conditions will cause a significant inconvenience and, if ignored, could lead to hazardous consequences.

A watch is stronger than an advisory. It tells you that hazardous weather is likely in the next 12-48 hours. Watches are issued to give you time to prepare and plan for weather threats. When a watch is issued, it’s prudent to listen to NOAA Weather Radio All Hazards and check the forecast frequently atNOAA’s National Weather Service Web site (http://www.weather.gov/).

A warning means a threat is occurring or is imminent, and you need to take protective action.
Pay close attention to weather forecasts and listen for advisories, watches and warnings like these:
• Winter Weather Advisory – Expect two or more of the following weather conditions: snow,
freezing rain or drizzle, sleet or blowing snow. Be prepared for hazardous driving conditions.
• Winter Storm Watch – In the next 12-48 hours, severe winter weather conditions are favorable for heavy snow, blizzard conditions, freezing rain or sleet.
• Winter Storm Warning – This means that severe weather is imminent or has already begun.
Expect any combination of heavy snow, freezing rain, sleet and strong winds.
• Blizzard Warning – Blizzards are the most dangerous winter storms. A blizzard is heavy snow and strong winds (35 mph or greater) that combine to produce blinding snow with near zero visibility, deep drifts, and a life-threatening wind chill. (http://www.noaa.gov/features/03_protecting/index.html)

Tuesday, November 24, 2009

Not Stormy for Thanksgiving Travels

Tuesday, 11:30 A.M. http://www.accuweather.com/mt-news-blogs.asp?partner=accuweather&blog=Lundberg&pgurl=/mtweb/content/Lundberg/archives/2009/11/not_stormy_for.asp

Anyway, the main message for today and tomorrow is one of no major storms coast to coast, and border to border. Oh, there will be some places where the travel will be a little dicey tomorrow, but in terms of large-scale storms that will have a significant disruptive impact on travelers, there won't be any.

Let's look at the problem spots one by one, starting first in the Northwest. A storm heading across the northeast Pacific will head for northern British Columbia tomorrow, dragging a cold front, weak at that, toward western Washington and northwest Oregon in the afternoon. The result will be some rain, with some locations getting an inch or two of rain, mainly over the Olympics. There won't be the wind with this storm that we've seen in recent events, either. Snow levels will be high, so I suspect getting over the passes shouldn't be too difficult tomorrow afternoon. Once east of the Cascades, it will be dry, and very little moisture will even reach northwest Oregon until Thanksgiving afternoon when a second system will break off from the main flow of the jet stream and take direct aim at the state.

Another area of potentially bad weather will be the Midwest tomorrow, as a slow-moving storm coming out of southern Iowa this afternoon will send some rain out of Wisconsin into Michigan, though the rain won't be all that heavy. If there's any real travel problems, it would be in the colder air on the back side of the storm. A second upper level disturbance digging southeastward from Montana this afternoon and tonight will invigorate this whole storm and cool the column to the point where snow can make it to the ground across parts of western Wisconsin, eastern Minnesota, northeastern Iowa, and northwest Illinois, especially tomorrow afternoon and early tomorrow night. Even here, though, it would be a sloppy, wet snow that at best would amount to a few inches. In most cases, it would be a coating to an inch or two, enough to cause some headaches and make for great snowmen. Otherwise, it's not going to affect a very big area.

Farther downstream, the weather from the eastern Lakes and across the Appalachians into New England and the mid-Atlantic states will just be gloomy, as in little to no sun. The low level moisture that has invaded the region will have no escape hatch without much wind and a fresh air mass to replace it. Look for some drizzle and fog to be your biggest weather adversary in these areas, with a little rain in some areas thrown in for good measure. Bleak and boring, but it could be much, much worse.

The final area will be Florida, especially the central and southern counties of the state. There's a ton of activity right now bursting across the Gulf of Mexico, and an upper level disturbance will help drive this all across the sunshine state tonight and tomorrow in conjunction with a developing surface storm. Some of this will also graze the coast of Georgia and the coastal Carolinas.

Aside from that, the weather will be benign across most of the country, and that's good for those who are planning trips of any distance, especially from the nations' major airports.

This Gulf storm development will not be done once crossing Florida tomorrow afternoon. As it develops further Wednesday night and Thursday off the Southeast coast, it will threaten parts of the Northeast with a more significant precipitation event sometime later on Thanksgiving into Friday, though I suspect that most will be disappointed at the outcome.

More upstream energy digging in from Midwest into the Great Lakes Wednesday and Thursday will help to deepen the storm as it heads by Cape Cod and heads for the Gulf of Maine. In the absence of any real overrunning surface, it will be tough to throw Atlantic moisture back over a non-existent cold dome over New England. Therefore, I'd have to believe most of New England will be too warm on the front side of this storm to get anything other than rain. About the only way it can snow as I see it is as the cold air collapses into the back side of the storm that you get fitful bursts of precipitation across western New England into the Adirondacks that could easily change to wet snow late Thursday night and Friday morning before going away in the afternoon.

There will be some lake effect snow around the Lakes Thursday into Friday, even though the air really won't be arctic in nature. It'll simply be cold enough so that some of the preferred areas pick up several inches of snow. And in most cases, this will be the first meaningful snow event of the season around the lakes!

A quick check of the longer range forecast suggests this cold that comes through the pattern with this developing trough will come and go. In other words, the moderating process will begin on the Plains Friday, spread across the Mississippi into the Midwest Saturday, and then filter into the Northeast in reduced fashion for Sunday and the early part of next week.

Still another storm will come out of the southern branch of the jet to open up next week, but it really looks as if the upper level trough to accompany this will be a little farther west, thanks in large part to blocking downstream that isn't over Greenland, but rather WEST of Greenland. In turn, that is likely to turn that storm toward the Great Lakes over time, and keep any snow associated with it to the north and west of the storm track, none of which should impact the northern Rockies and northern Plains, or maybe even much of the Midwest.

The cold that follows this trough will be more destined for the southern tier of states, not the Northeast, where it just may stay warmer than normal through most of next week. After that, THEN maybe some arctic air will truly get involved in the picture, but in deference to the NAEFS and the European Weekly Climate Forecasts from last Thursday night, my hunch is this will be centered on the Rockies and Plains, not the East, at least initially. Now, if the block were farther east over Greenland, then the cold might be centered along or east of the Mississippi, but that doesn't appear to be the case. More on that line of thinking tomorrow. For now, my son is already waiting - time to run!

Friday, November 20, 2009

A parade of Pacific storms far from over.

The one-two punch of the past 24 hours into today is reaching a climax now with heavy rain moving into northern California, and it's bringing the first really heavy snow of the season to the Sierra. However, it will fade pretty quickly tonight as this upper-level trough moves inland. Why? The next storm will be knocking on the door of the Northwest by tomorrow, spreading more heavy rain and mountain snow inland during the afternoon and at night.

This system will taper to showers Sunday, only in time for still another storm to take aim at the region Sunday night and Monday. While the core of that storm is more aimed at British Columbia, it will nevertheless rain in much of Washington and western Oregon, with little for California.

Wednesday, November 18, 2009

Weird Mix of Weather After Oregon Coast Storm, More Warnings

Flooding just south of Seaside is expected to subside by Wednesday morning.

(Oregon Coast) - Monday's storm unloaded plenty of statistics on the Oregon coast, but it left a strange set of conditions afterwards to spectacular results of varying degrees. The central coast reported a beautiful sunset Tuesday afternoon, while the north coast saw everything from a downpour of rain, a sky thick with stars, and then even thunder and lightning.

Meanwhile, another storm system is poised to bring a smaller volley of wind gusts Wednesday to the coast, and a wind watch has been changed to a wind warning.
After raining most of the day Tuesday, the skies around Manzanita became unusually clear, revealing a sea of stars above the raging ocean about 8 p.m. Then, perhaps and hour later, thunder rolled through the area, as massive flashes of lightning could be seen in the east and north periodically.

All kinds of damage was reported on the north coast during the storm, from Astoria down to at least Oceanside, but the central coast seemed to be spared any destruction or too much excitement. Gusts of around 90 to 95 mph were reported in places like Cape Foulweather near Depoe Bay, Garibaldi and Waldport.

But on the north coast, flooding stranded motorists coming to and from Seaside, trees were knocked down and the roof of the old courthouse in Seaside was torn off and strewn around the street.

During the storm, electricity went out in several places in Clatsop and Tillamook Counties periodically throughout the day, but over 2,700 people were without power for almost 24 hours in Cannon Beach.

Power came back on around 3 p.m. Tuesday to most in town, but that didn’t save shops and restaurants from being closed the whole day. As of 6 p.m., only a handful of businesses were open, including two restaurants and one store.

A sign on the Lumberyard Restaurant told the story of all but two Cannon Beach eateries that day: “Closed due to power outage.”

As of 5:30 p.m., the road just south of Seaside was still substantially flooded, although most cars were able to get through. ODOT workers at the scene said the water had gone down eight inches on Tuesday, and they expected it to be clear by morning.
The Sea Horse Motel in Lincoln City reported occasional big gusts around 11 p.m. Monday night, but otherwise it was a “typical storm,” they said. There have so far been no reports of flooding on the central coast.

Angi Wildt, with Depoe Bay Winery, reveled in the madness.
“Last night I went for a walk at Beverly Beach,” Wildt said. “There was a layer of sand blowing above the wet sand and it was fun and invigorating to lean my back into the wind and have it hold me up. We've enjoyed blue skies today and the sunset is beautiful.”

Sarah MacDonald, who owns Sea Sweet Vacation Rentals in Oceanside, said she missed most of it, as she was flying home from Maui.

“It was pretty darn rocky,” she said. “Came home over the Wilson River Highway and thought: ‘What the heck hit the coast?’ Debris everywhere. Got home, woke up this morning and checked the rentals, and the neighbors had siding blown off. The wind must have hit pretty darn hard. I guess we were in the last of it, but it was over by the time we arrived home.”

In Pacific City, Kiwanda Coastal Properties owner Nicole Twigg noticed something odd during the windy melee.

“I really wish I would have taken a picture of my neighbor washing his car yesterday in full rain gear when the wind was really starting to pick up,” she said. “Of all days, he was thinking he’d better get out there and wash it.”
Garibaldi saw gusts around 90 mph on Monday night.

But the fun isn’t over for the north coast.
The National Weather Service (NWS) had issued a high wind for Wednesday, as another system of storms is expected to kick in. That was changed to a wind warning, and extended from Wednesday through to early Thursday.

“The first in a series of storms will begin to affect the south Washington coast and north Oregon coast on Wednesday afternoon,” the NWS said in a bulletin. “Winds of 25 to 35 mph with gusts to 50 mph will begin to affect the coast by mid afternoon. Winds will then increase to 30 to 40 mph with gusts to 70 mph in the evening.”
The NWS said they expect winds to continue on into Thursday.

More wind, heavy rain due as storms line up

by KATU.com Staff

Originally printed at http://www.katu.com/news/70387552.html

PORTLAND, Ore. -- Sure, it’s November in the Northwest and summery weather is not to be expected while rain and a bit of wind is par for the course.

But KATU Meteorologists are again warning that a trio of wet and windy weather systems is again bearing down on the region.

The first wave of weather is due to roll in Wednesday evening, bringing a good soaking and some stiff breezes to the region.

Then, another pulse of wet weather will arrive Thursday morning, likely right on time for the morning commute. Expect standing water, limited visibility and more wind.

That storm is expected to stall over the region and pump warm, moist air from over the ocean into Oregon and Washington. Small rivers and streams could be in danger of flooding.

Finally, a third system is lurking over the Pacific Ocean and should hit the Northwest on Saturday, bringing yet more rain and wind to soggy hills and snow to mountain locations.

Coastal locations could see up to 6 inches of rain from the system, on top of the heavy rain from the last system.

On Wednesday, heavy surf was founding the Oregon Coast ahead of the storm, as witnessed by KATU reporter Adam Ghassemi at the Barview Jetty in Garibaldi.

On the plus side, the incoming storms will continue to pile up snow in the Cascade Range, supplementing the base put down by the last wet weather system that passed through just a few days ago.

Tuesday, November 17, 2009

High winds whirl up damage

http://www.dailyastorian.info/main.asp?SectionID=2&SubSectionID=398&ArticleID=65712

By JOE GAMM and NANCY McCARTHY The Daily AstorianTuesday, November 17, 2009

The North Coast was picking up the pieces Tuesday after Monday night's big storm walloped the coast with high winds and almost constant rain.The National Weather Service warns that more bad weather is on the way.

Sustained winds of 55 mph were reported at Clatsop Spit near Astoria and there was one report of a gust of 62 mph in Seaside. Farther south, wind gusts at or exceeding 89 mph were reported at Waldport and Garibaldi.

A 95 mph gust was reported about 5:15 p.m. Monday at Cape Foulweather between Newport and Lincoln City.The U.S. Coast Guard closed the bars at the Columbia River and Tillamook Bay Monday and they remained closed overnight.

National Weather Service meteorologist Jonathan Wolfe in Portland said one to two inches of rain fell in about 12 hours on the Coast. The weather service has issued a flood watch for nearly all of northwest Oregon.

The biggest casualty was the roof of the old City Hall building at Broadway and Roosevelt Drive in Seaside that blew off. The road was blocked off by city of Seaside public works crews and was to be inspected at first light to determine how quickly it could be moved. The building was being renovated for local business use.

Flooding south of Seaside caused U.S. Highway 101 to be closed overnight to all but trucks and large high-profile vehicles, with a reported one foot of water on the roadway.

Adam Torgerson, the public information officer for Oregon Department of Transportation Region 2, said staff measured 16 inches of standing water on U.S. Highway 101 at Beerman Creek at 9 a.m. this morning. Although the rains from overnight had subsided, he said the tide was coming in, so crews did not expect the water on the road to recede.

Traffic through the area is limited to high-clearance vehicles, such as basic four-wheel drive vehicles. Torgerson said no passenger cars or minivans are allowed to pass through the high water."Over the course of the storm there were remarkably few trees down," Torgerson said. "There is brush and debris in various sections of the roads."He said crews are working to remove the brush and debris from Highway 101 and U.S. Highway 26.

He said hazardous tree removal done this summer might have had an impact on the storm's damage. There were only a few trees in the area that fell across roads."Typically, with that much wind, there is more," Torgerson said.Flood warnings were issued Monday for the Nehalem River. Between 2 and 2 1⁄2 inches of rain fell overnight and two rivers in Washington - the Willapa and the Grays - exceeded flood stage.Cannon Beach Elementary School was closed today because of a power outage that began at about 4 p.m. Monday. All other schools in the Seaside School District were open.Sheila Holden, regional community manager Pacific Power, said the wind damaged three transmission towers.

A mobile generator was to be moved to Cannon Beach to power core businesses, from Cannon Beach Elementary School south to the Pig 'N Pancake. She was unsure when power would be restored to the rest of the city.One of the transmission towers is in the middle of water, Holden said, and an assessment would have to be made about how to get equipment to it and what damage needed to be repaired.

Other sporadic outages occurred from Warrenton to Seaside, but those were repaired, Holden said.The transmission line serving Cannon Beach is in dense forest, which in places is not easy to reach."Cannon Beach is a beautiful place, but the terrain and mother nature seem to hit it the most," Holden said.

City Manager Rich Mays said the city staff planned to meet this morning to discuss damage that may have occurred and what to do if an extended power outage continued. Although there were no plans yet to open a shelter, Mays said that would be discussed. Coincidentally, the city's shelter committee had scheduled a meeting at 1 p.m. Tuesday.Two trees came down in town, including one that landed on an SUV on Hemlock Street between Jackson and Monroe streets and one that fell over Hills Lane. Another major branch fell at Dawes and Spruce streets.

In addition to power outages, telephone service went out in some places, including Arch Cape.Clatsop County Emergency Management coordinator Gene Strong said this morning that staff held a weather briefing Monday afternoon to prepare for the coming storm. He said staff agreed to monitor the weather and remain prepared to react if needed, but emergency management plans were not implemented overnight."The bad news is we have another (storm) coming," he said.Clatsop County Sheriff Tom Bergin said there was little serious damage from the overnight storm. He said there were few trees across roads this year. "The first storm usually just loosens 'em," Bergin said. "We'll be watching closely Thursday."The storm hit KMUN's transmission tower on Megler Mountain Monday morning.

The damage to the antenna meant that station managers had to shift programming to its sister station KCPB at 90.9 FM. The regular programming on KCPB was being pre-empted.

The storm damage happened between 8 and 10 a.m. Monday at the transmission tower, which is on a ridge above the Washington side of the Astoria-Megler Bridge. The strong winds battering the North Coast blew the antenna off the tower. A station spokesman said staff were working hard to restore normal broadcasting as soon as possible. A new antenna was being fabricated and shipped to the station.The interim general manager, Doug Sweet, was working with former general manager Dave Hammock and engineer Terry Wilson to correct the issue, but feared it could take three to five days. KTCB Tillamook and the three translators (South Astoria 91.1, Cannon Beach 89.5, and Wheeler/Manzanita 88.9) will be silent during this period. The receivers for KTCB and the translators listen to 91.9 for KMUN, and the engineering department cannot re-tune them to hear KCPB at 90.9. KMUN continued to broadcast on the internet at coastradio.org KAST Radio also had trouble. The Tuesday morning news crew reported the station's satellite dish was hit by the storm, meaning they had to offer local broadcasting instead of regular national offerings in the early morning slot.

The National Weather Service said a series of storm systems will continue to roll through the region through the weekend, beginning Wednesday night.In Washington, flood waters are receding in many areas. However, the flood warning remains in effect until Wednesday afternoon for the Skokomish River near Potlatch.

A five-mile section of Highway 101 was closed by flooding and mudslides Monday night near Hoodsport. Transportation Department spokeswoman Emily Pace says it remains officially closed until experts assess the situation, but some traffic Tuesday morning drove around the "road closed" signs.

Some high winds reported around Washington: Hoquiam 70 mph, Bellingham 58 mph, Everett 46 mph, Bremerton 39 mph, Sea-Tac Airport 35, Olympia 36.

Monday, November 16, 2009

US Highway 101 Flooding South of Seaside

We just received a flash alert from ODOT that there is 10 inches of water on the US 101 highway, just south of Seaside.

http://www.tripcheck.com/popups/Cam.asp?camera=652&curRegion=1

You can check road conditions for other areas of Oregon at http://www.tripcheck.com/Pages/RCmap.asp?curRegion=0&mainNav=RoadConditions

UPDATE (5:04 PM): US 101 is now closed south of Seaside. Crews report more than 1 foot of water covering the road.

Elevated Weather Alerts for Oregon

Today the National Weather Service has elevated the weather alerts for the incoming storm. There are more than a dozen alerts, and you can see them at http://www.weather.gov/alerts-beta/or.php?x=1

Here are the highlights:

▪ Surf advisory with breaker heights as high as 25-28 feet. Storm surge combined with the near-maximum lunar high tide will cause beach erosion and riptides farther inland then normal.
▪ Coastal winds 45-55MPH with gusts up to 85 MPH. Winds have already been reported to 80+MPH in certain areas.
▪ Inland winds are expected to be 25-35 MPH with gusts up to 45 MPH.
▪ Rainfall of 3-5 inches in northwest Oregon near the Willapa hills and North Oregon Coast Range.
▪ The Nehalem River is under flood watch, as well as urban streams in the northwest corner of Oregon.
▪ Oregon Coast is under flood watch due to heavy rains

Wednesday, November 4, 2009

SPECIAL WEATHER STATEMENT

NATIONAL WEATHER SERVICE PORTLAND OR
342 AM PST WED NOV 4 2009
ORZ001>004-WAZ020-021-050500-
NORTH OREGON COAST-CENTRAL OREGON COAST-
COAST RANGE OF NORTHWEST OREGON-
CENTRAL COAST RANGE OF WESTERN OREGON-WILLAPA HILLS-
SOUTH WASHINGTON COAST-
INCLUDING THE CITIES OF...ASTORIA...CANNON BEACH...TILLAMOOK...
LINCOLN CITY...NEWPORT...FLORENCE...VERNONIA...JEWELL...TRASK...
GRANDE RONDE...TIDEWATER...SWISSHOME...FRANCES...RYDERWOOD...
RAYMOND...LONG BEACH...CATHLAMET
342 AM PST WED NOV 4 2009


...WIND...RAIN...AND HEAVY SEAS TO ARRIVE LATER THURSDAY...
A STRONG LOW PRESSURE SYSTEM WILL RAPIDLY STRENGTHEN INTO A
POWERFUL STORM TODAY AND THURSDAY. WHILE THE CENTER OF THIS LOW
PRESSURE SYSTEM IS EXPECTED TO REMAIN IN THE GULF OF ALASKA...IT
WILL PUSH A STRONG COLD FRONT ONSHORE INTO THE PACIFIC NORTHWEST
THURSDAY.

WINDS ASSOCIATED WITH THE FRONT MAY GUST AS HIGH AS 50 TO 60 MPH
NEAR THE BEACHES AND COASTAL HEADLANDS LATER THURSDAY...AS WELL AS
ACROSS THE HIGHER TERRAIN OF THE COAST RANGE. THE FRONT WILL
LIKELY BE ACCOMPANIED BY A PERIOD OF HEAVY RAIN...WHERE WHERE 1 TO
3 INCHES OR RAIN ARE POSSIBLE THURSDAY AND THURSDAY NIGHT. RAIN
CONTINUES AT TIMES INTO SATURDAY...WITH AN ADDITIONAL 1 TO 2
INCHES OF RAIN EXPECTED.

ANOTHER SIGNIFICANT ASPECT OF THE GULF OF ALASKA STORM SYSTEM WILL
BE THE VERY LARGE OCEAN SWELL EXPECTED TO DEVELOP AS THE STORM
STRENGTHENS. THIS SWELL MAY BEGIN IMPACTING THE SOUTH WASHINGTON
AND NORTH OREGON COAST WITH HIGH SURF AS EARLY AS THURSDAY
MORNING...AS SWELL OF 25 TO 30 FEET WILL CREATE CHAOTIC SURF ZONE
THURSDAY NIGHT THROUGH SATURDAY. THE HEAVY SURF MAY PROVIDE THE
POSSIBILITY FOR MINOR COASTAL FLOODING DURING HIGH TIDE...AND THE
LARGE BREAKERS MAY PRODUCE HAZARDOUS CONDITIONS ALONG THE BEACHES.

Thursday, October 15, 2009

NWS Issues Special Weather Statement for Oregon

The National Weather Service issued a special weather statement today for Northern Oregon and Southern Washington. Heavy rain is expected over the next 48 hours, bringing between 1 and 5 inches depending upon location.

Rivers are not expected to flood, but heavy rains in the coastal range often cause mudslides and localized flooding of streams. We recommend the following:

  • Make sure your emergency kit is ready and you have extra food and water, especially if you are in a remote location and can be stranded by flooding or slides
  • Pay attention to nearby hills and streams in the event of a mudslide or flood
  • If you do drive in the heavy rain, drive slowly and avoid standing water - pools of dirty water are usually much deeper then they appear.
  • If you have to go out on foot, do not ever attempt to cross running flood waters or mud slides, they are very dangerous and can wash away anyone.

    http://www.wrh.noaa.gov/total_forecast/getprod.php?wfo=pqr&sid=PQR&pil=SPS

    Statement as of 2:29 PM PDT on October 15, 2009

    ... Heavy rain expected Friday night and Saturday...

    An unusually wet early season system is expected to dump
    several inches of rain over the area early this weekend. The bulk
    of the rain will fall from late Friday afternoon through Saturday
    as the system taps into a tropical air mass. Models are in
    agreement on bringing the front onshore and then stalling it...
    although details on where the heaviest rain will fall are still
    evolving. As the front stalls the system will usher in a warm and
    moist air mass and consequently wring it out over northwest
    Oregon and southwest Washington. Rainfall accumulations are
    expected to be 2 to 5 inches in the Coast Range... 1 to 2 inches
    northern portions of Willamette Valley... 2 to 4 inches in the
    South Washington and north Oregon Cascades... and around an inch
    elsewhere.

    Since this system is coming early in the year when rivers are near
    their Summer lows... river flooding should not be much of a
    concern. However... local areas may see higher than expected
    accumulations and therefore local flooding of small streams
    remains a possibility. Remember to maintain a higher awareness
    level and keep informed on this developing scenario.

    Monitor NOAA Weather Radio or weather.Gov/Portland for the latest
    information... forecasts... and warnings.
  •