A mesonet site 28 miles north of Pasco recorded a peak wind gust of 68 MPH.
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The episode as NWS PDT wrote it up.
A mesonet site 28 miles north of Pasco recorded a peak wind gust of 68 MPH.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Pendleton, OR wrote its last area forecast discussion before the first event at Apr 27, 7:45 AM PST, 4 hours 58 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PENDLETON OREGON 845 AM PDT TUE APR 27 2004 .SHORT TERM...STRONG COLD FRONT TO MOVE THROUGH THE REGION TODAY WITH MAIN EFFECT TO BE WINDY CONDITIONS AND SOME SMALL CHANCES OF SHOWERS AND A FEW THUNDERSTORMS OVER THE BLUE AND WALLOWA MOUNTAINS. WINDS HAVE BEEN INCREASED IN THE FORECAST WITH A WIND ADVISORY ISSUED FOR THE YAKIMA...KITTITAS VALLEYS AND THE LOWER COLUMBIA BASIN AND BLUE MOUNTAINS FOOTHILLS OF WASHINGTON AND OREGON. THE FRONT IS EXPECTED TO MOVE THROUGH DURING THE AFTERNOON HOURS WITH A STRONG 100-120KT UPPER JET STREAM. MOISTURE WITH THIS FRONT WILL BE SOMEWHAT LIMITED...HOWEVER THERE SHOULD BE ENOUGH TO GET ISOLATED TO SCATTERED SHOWERS...AND THUNDERSTORMS OVER THE NORTHEAST PART OF THE FORECAST AREA...AND SHOWERS OVER THE CASCADE EAST SLOPES. EXPECT THE SHOWERS TO CONTINUE OVER THE NORTHEAST CORNER OF OREGON AND EXTREME SE WASHINGTON WEDNESDAY MORNING...BUT THEY SHOULD BE DECREASING AS THE DAY PROGRESSES ON WEDNESDAY AS THIS WEATHER SYSTEM MOVES ON OUT OF THE AREA. HIGH PRESSURE WILL RETURN ON THURSDAY. MML && .PRELIMINARY POINT TEMPS/POPS... PENDLETON (AIRPORT) 73 43 64 / 10 30 20 WALLA WALLA 71 45 66 / 10 30 20 TRI-CITIES 76 44 70 / 10 20 05 YAKIMA 73 41 68 / 10 10 10 && .PDT WATCHES/WARNINGS/ADVISORIES... OR...WIND ADVISORY OR ZONES 44 AND 45 THIS AFTERNOON UNTIL MIDNIGHT. WA...WIND ADVISORY WA ZONE 26 THROUGH 29 THIS AFTERNOON UNTIL MIDNIGHT. && 93
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PENDLETON OR 825 AM PDT TUE APR 27 2004 ORZ041>050-WAZ024>030-281200- BLUE MOUNTAINS OF OREGON OR-CENTRAL OREGON OR- EAST COLUMBIA RIVER GORGE OR-EAST COLUMBIA RIVER GORGE WA- EAST SLOPES SOUTHERN CASCADES WA-FOOTHILLS OF THE BLUE MOUNTAINS WA- FOOTHILLS OF THE BLUE MOUNTAINS OR-GRANDE RONDE VALLEY OR- JOHN DAY VALLEY OR-KITTITAS VALLEY WA-LOWER COLUMBIA BASIN WA- LOWER COLUMBIA BASIN OR-NORTH CENTRAL OREGON OR- NORTHWEST BLUE MOUNTAINS WA-OCHOCO-JOHN DAY HIGHLANDS OR- WALLOWA COUNTY OR-YAKIMA VALLEY WA- 825 AM PDT TUE APR 27 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL AND NORTHEAST OREGON AS WELL AS SOUTH CENTRAL AND SOUTHEAST WASHINGTON. .DAY ONE... A WIND ADVISORY IS IN EFFECT FOR THIS AFTERNOON AND THIS EVENING FOR THE KITTITAS VALLEY...THE YAKIMA VALLEY...THE COLUMBIA BASIN AND THE FOOTHILLS OF THE BLUE MOUNTAINS. EXPECT WINDS 30 TO 40 MPH WITH GUSTS TO 50 MPH POSSIBLE FROM THIS AFTERNOON THROUGH THIS EVENING IN THE KITTITAS VALLEY. ELSEWHERE IN THE ADVISORY AREA...WINDS OF 25 TO 35 MPH WITH GUSTS TO 45 MPH CAN BE EXPECTED. (PLEASE SEE PRODUCT ID PDXNPWPDT FOR MORE DETAILS). A STRONG COLD FRONT WILL MOVE THROUGH THE REGION TODAY AND CAUSE A TIGHT PRESSURE GRADIENT AND INCREASING WINDS THIS AFTERNOON AND TONIGHT. IN ADDITION TO THE WIND...AREAS OF BLOWING DUST IS POSSIBLE NEAR RECENTLY PLOWED FIELDS. THE WINDS WILL DECREASE AFTER MIDNIGHT TONIGHT AS THE COLD FRONT MOVES TO THE EAST OF THE AREA. .DAYS TWO THROUGH SEVEN... THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. HIGH PRESSURE ALOFT WILL BUILD OVER THE REGION WITH A WARMING TREND AND DRY CONDITIONS THROUGH THE PERIOD. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED. WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
The national radar mosaic for the moment the first event began.
1 high wind. Local standard time, as filed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Washington in 2004Every state in 2004This day in weather historyWarnings in Washington, April 2004
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5390405.