Monday, May 3, 2010

High Wind Warning and Hazardous Weather Outlook

High Wind Warning

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE PENDLETON OR
414 AM PDT MON MAY 3 2010

EASTERN COLUMBIA RIVER GORGE OF OREGON-NORTH CENTRAL OREGON-
LOWER COLUMBIA BASIN OF OREGON-FOOTHILLS OF THE BLUE MOUNTAINS OF OREGON-NORTHERN WHEELER AND SOUTHERN GILLIAM COUNTIES-EASTERN COLUMBIA RIVER GORGE OF WASHINGTON-KITTITAS VALLEY-YAKIMA VALLEY-LOWER COLUMBIA BASIN OF WASHINGTON-FOOTHILLS OF THE BLUE MOUNTAINS OF WASHINGTON-NORTHWEST BLUE MOUNTAINS OF WASHINGTON-EAST SLOPES OF THE SOUTHERN CASCADES OF WASHINGTON-INCLUDING THE CITIES OF...THE DALLES...DUFUR...MADRAS...MAUPIN...MORO...SHANIKO...ARLINGTON...BOARDMAN...HERMISTON...IONE...
HEPPNER...PENDLETON...PILOT ROCK...CONDON...FOSSIL...SPRAY...WHITE SALMON...ELLENSBURG...THORP...SUNNYSIDE...TOPPENISH...YAKIMA...CONNELL...PROSSER...TRI-CITIES...DAYTON...WAITSBURG...WALLA WALLA...SKI BLUEWOOD RESORT...
GOLDENDALE...APPLETON...TROUT LAKE...BICKLETON


...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS EVENING...
.
* TIMING: STRONG AND LOCALLY DAMAGING WINDS WILL BEGIN THIS MORNING AS A COLD FRONT SWEEPS THROUGH THE AREA. THE WINDS WILL SLOWLY DECREASE AFTER SUNSET THIS EVENING.

* WINDS: SUSTAINED WINDS OF 35 TO 45 MPH WILL OCCUR WITH GUSTS OF 55 TO 65 MPH.

* IMPACTS: THESE WINDS WILL CREATE DIFFICULT DRIVING CONDITIONS...
ESPECIALLY FOR HIGH PROFILE VEHICLES.
IN ADDITION...THERE WILL BE AREAS OF BLOWING DUST CAUSING SIGNIFICANTLY REDUCED VISIBILITIES. THE STRONG WINDS WILL CREATE DIFFICULTY WALKING FOR PEDESTRIANS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HIGH WIND WARNING IS ISSUED WHEN SUSTAINED WINDS ARE EXPECTED
TO BE 40 MPH OR GREATER WITH GUSTS IN EXCESS OF 58 MPH. THESE WINDS CAN CAUSE PROPERTY DAMAGE AND SNAP LARGE TREE LIMBS AND POWER LINES. BE ALERT FOR FLYING DEBRIS IF YOU VENTURE OUTDOORS.

HAZARDOUS WEATHER OUTLOOK

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL AND NORTHEAST OREGONAS WELL AS SOUTH CENTRAL AND SOUTHEAST WASHINGTON.

.DAY ONE...
TODAY AND TONIGHT STRONG WIND EAST SLOPES OF THE CENTRAL CASCADES OF WASHINGTON, EAST SLOPES OF THE SOUTHERN CASCADES OF WASHINGTON, EASTERN COLUMBIA RIVER GORGE OF WASHINGTON, KITTITAS VALLEY, YAKIMA VALLEY, LOWER COLUMBIA BASIN OF WASHINGTON, FOOTHILLS OF THE BLUE MOUNTAINS OF WASHINGTON, NORTHWEST BLUE MOUNTAINS OF WASHINGTON, EASTERN COLUMBIA RIVER GORGE OF OREGON, NORTH CENTRAL OREGON, CENTRAL OREGON, LOWER COLUMBIA BASIN OF OREGON, FOOTHILLS OF THE BLUE MOUNTAINS OF OREGON, NORTHERN WHEELER AND SOUTHERN GILLIAM COUNTIES, JOHN DAY BASIN

A STRONG COLD FRONT WILL CROSS THE AREA TODAY. THE COMBINATION OF A VERY TIGHT SURFACE PRESSURE GRADIENT AND MIXING DOWN OF STRONGWINDS WITH THE FRONTAL SYSTEM WILL RESULT IN STRONG TO LOCALLY DAMAGING WINDS OVER A WIDE AREA TODAY THROUGH EARLY THIS EVENING. NUMEROUS WARNINGS AND ADVISORIES FOR HIGH WINDS ARE IN EFFECT

DAYS TWO THROUGH SEVEN...T
TUESDAY THROUGH SUNDAY...THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

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