A moist westerly flow brought heavy snow to the higher elevations in western Klickitat County. Ten to 11 inches of snow were reported from midnight to 4 pm.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS PDT wrote it up.
A moist westerly flow brought heavy snow to the higher elevations in western Klickitat County. Ten to 11 inches of snow were reported from midnight to 4 pm.
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 Feb 23, 8:40 PM PST, 3 hours 20 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PENDLETON OR 840 PM PST FRI FEB 23 2007 .UPDATE...UPPER RIDGE AXIS AHEAD OF THE NEXT WEATHER SYSTEM IS CAUSING CONDITIONS TO STABILIZE THIS EVENING WITH CONVECTIVE SHOWERS DISSIPATING NICELY. CONDITIONS WILL CONTINUE TO BECOME TRANQUIL OVER NORTHEAST OREGON AND SE WASHINGTON DURING THE NEXT FEW HOURS. NEXT SYSTEM WILL MOVE ONSHORE OVERNIGHT WITH PRECIPITATION SPREADING EAST OF THE CASCADES IN THE MORNING SATURDAY...CONTINUING INTO THE AFTERNOON. BY THE TIME THE PRECIPITATION ARRIVES TO THE FORECAST AREA...THE LOWER ELEVATIONS SHOULD HAVE WARMED UP ENOUGH FOR PRECIP TO BE MAINLY RAIN...I.E. IN THE COLUMBIA BASIN AND THE BLUE MOUNTAIN FOOTHILLS. ELSEWHERE SOME SNOW COULD FALL IN THE YAKIMA AND KITTITAS VALLEYS BEFORE ALSO WARMING UP TO CAUSE A CHANGE-OVER TO RAIN. AS WITH THE LAST SYSTEM THE BLUE MOUNTAINS AND THE OTHER EASTERN MOUNTAINS WILL NEED TO BE MONITORED FOR THE POTENTIAL NEED OF A SNOW ADVISORY FOR SATURDAY AFTERNOON AND NIGHT. SNOW LEVELS WILL START OUT SATURDAY MORNING AROUND 1500 - 2500 FEET AND WILL THEN RISE TO ABOUT 3500 FEET BY SATURDAY AFTERNOON AND THEN LOWER TO ABOUT 2000 TO 2500 FEET SATURDAY NIGHT. AT THIS TIME AM NOT EXPECTING SNOW ADVISORY AMOUNTS...BUT 3 TO 6 INCHES WILL BE COMMON ACROSS THE NORTHERN BLUE MOUNTAINS WITH LESSER AMOUNTS ELSEWHERE IN THE EASTERN MOUNTAINS THROUGH SATURDAY NIGHT. WILL UPDATE FORECAST A BIT LATER TO REMOVE EVENING SHOWERS TONIGHT AND FOR EVENING WORDING. && .AVIATION...VFR CONDITIONS WITH LIGHT WINDS ARE EXPECTED OVERNIGHT AND IN THE MORNING SATURDAY AT ALL TAF SITES AND TWEB ROUTES. AS THE NEXT WEATHER SYSTEM MOVES INLAND DURING THE DAY SATURDAY CONDITIONS COULD BECOME MVFR OR IFR IN INCREASING RAIN AND SNOW SHOWERS AS WELL AS WITH LOWERING CEILINGS AND VISIBILITY WITH THE PRECIPITATION SATURDAY AFTERNOON AND SATURDAY NIGHT. SOUTHERLY WINDS WILL ALSO INCREASE SATURDAY AFTERNOON FROM THE SOUTH TO GENERALLY ABOUT 10 TO 20 KTS ACROSS THE AREA. && .PREV DISCUSSION.../ISSUED 245 PM PST FRI FEB 23 2007/ SHORT TERM...TONIGHT THROUGH SUNDAY NIGHT...UPPER LEVEL TROUGH HAS ALMOST FINISHED MOVING OFF TO THE EAST AND OUT OF THE AREA. THIS WILL GIVE THE AREA A SHORT BREAK BEFORE THE NEXT SYSTEM BEGINS WORKING INTO THE AREA OVERNIGHT. PRECIPITATION WILL MOVE ACROSS THE CASCADES AND INTO THE WESTERN PORTION OF THE AREA BY MORNING. LIKELY POPS WILL SPREAD ACROSS THE AREA DURING THE DAY. WITH THE FLOW SHIFTING TO THE SOUTH A DECENT AMOUNT OF MOISTURE WILL BE AVAILABLE FOR THE SYSTEM BUT THE TIMING APPEARS SUCH THAT MUCH OF THE PRECIPITATION WILL FALL DURING THE DAY TOMORROW AS RAIN. THE EAST SLOPES OF THE WASHINGTON CASCADES WILL SEE SNOW...ESPECIALLY NEAR THE CREST BUT IT APPEARS THAT AMOUNTS WILL STAY BELOW ADVISORY LEVELS...3 TO 6 INCHES BELOW 3500 FEET. DRIVING WILL STILL BE DIFFICULT FOR THOSE CROSSING THE MOUNTAINS ON SATURDAY. ANOTHER UPPER LEVEL TROUGH WILL SET UP OFF THE PACIFIC NW COAST TOMORROW AFTERNOON. THIS WILL CONTINUE A SOUTHERLY FLOW OVER THE AREA THROUGH THE REMAINDER OF THE EXTENDED PERIOD. THE AREA WILL SEE PRECIPITATION TAPER OFF SATURDAY AFTERNOON BEFORE THE NEXT WAVE APPROACHES FROM THE SOUTH ON SATURDAY NIGHT AND SUNDAY MORNING BRINGING SUBSTANTIAL PRECIPITATION TO THE MOUNTAINS OF CENTRAL AND NORTHEAST OREGON. MODELS HINT THAT AN ADVISORY MAY BE NEEDED SATURDAY NIGHT FOR WALLOWA COUNTY BUT WILL HOLD OFF TO SEE WHAT THE NEXT RUN OR TWO SUGGESTS. SUNDAY LOOKS RELATIVELY DRY FOR MOST OF THE AREA AS WE WILL SEE A SHORT BREAK BETWEEN WAVES. 83 LONG TERM...MONDAY THROUGH FRIDAY...ACTIVE WEATHER PATTERN NEXT WEEK. COLD UPPER TROUGH OVER THE PACIFIC NORTHWEST WILL KEEP CONDITIONS MOSTLY CLOUDY WITH OCCASIONAL RAIN AND SNOW. TEMPERATURES WILL REMAIN BELOW NORMAL THROUGH THE PERIOD. SNOW LEVELS WILL ALSO BE FAIRLY LOW. COULD SEE SOME IMPROVEMENT TOWARDS THE END OF THE WEEK AS MODELS SHOW UPPER TROUGH FINALLY MOVING EAST. 94 AVIATION...COOL UNSTABLE AIRMASS THROUGH THE EVENING WITH SCATTERED SHOWERS. CEILINGS BRIEFLY FALLING TO MVFR IN RAIN/SNOW SHOWERS. OTHERWISE CEILINGS MAINLY 040-070. GUSTY WESTERLY WINDS WILL DIMINISH LATER THIS EVENING. INCREASING MID LEVEL CLOUDS OVERNIGHT AS WARM FRONT APPROACHES. RAIN AND SNOW ASSOCIATED WITH FRONT WILL DEVELOP LATE AND CONTINUE INTO SATURDAY. CEILINGS WILL LOWER INTO THE 030-060 RANGE AS PRECIPITATION DEVELOPS. 94 && .PRELIMINARY POINT TEMPS/POPS... PDT 31 42 34 46 / 10 60 40 30 ALW 32 43 35 47 / 10 60 40 30 PSC 30 44 33 50 / 10 60 50 30 YKM 26 42 31 48 / 20 60 50 30 HRI 30 43 32 48 / 10 60 50 30 ELN 26 38 28 43 / 20 70 60 40 RDM 26 43 28 43 / 30 60 50 40 LGD 24 40 31 43 / 10 60 60 40 GCD 22 42 29 44 / 10 60 50 40 DLS 31 44 33 47 / 40 70 60 50 && .PDT WATCHES/WARNINGS/ADVISORIES... OR...NONE. WA...NONE. && TI:GGG FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT... WWW.WEATHER.GOV/PENDLETON 88/94/88
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PENDLETON OR 456 AM PST FRI FEB 23 2007 ORZ041-WAZ024-501-502-026>030-ORZ042>044-049-050-501>506-241300- EASTERN COLUMBIA RIVER GORGE OF WASHINGTON- EAST SLOPES OF THE CENTRAL CASCADES OF WASHINGTON- EAST SLOPES OF THE SOUTHERN CASCADES OF WASHINGTON- KITTITAS VALLEY-YAKIMA VALLEY-LOWER COLUMBIA BASIN OF WASHINGTON- FOOTHILLS OF THE BLUE MOUNTAINS OF WASHINGTON- NORTHWEST BLUE MOUNTAINS-NORTH CENTRAL OREGON-CENTRAL OREGON- LOWER COLUMBIA BASIN OF OREGON-GRANDE RONDE VALLEY-WALLOWA COUNTY- FOOTHILLS OF THE BLUE MOUNTAINS OF OREGON- NORTHERN BLUE MOUNTAINS OF OREGON- SOUTHERN BLUE MOUNTAINS OF OREGON- NORTHERN WHEELER AND SOUTHERN GILLIAM COUNTIES-JOHN DAY BASIN- OCHOCO-JOHN DAY HIGHLANDS- 456 AM PST FRI FEB 23 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL AND NORTHEAST OREGON AS WELL AS SOUTH CENTRAL AND SOUTHEAST WASHINGTON. .DAY ONE...TODAY AND TONIGHT THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. THERE WILL BE SCATTERED TO ISOLATED SNOW SHOWERS TODAY OVER THE DESCHUTES PLATEAU...JOHN DAY VALLEY...AND MOUNTAINS. THERE WILL BE A BRIEF DRY PERIOD BETWEEN SYSTEMS THIS AFTERNOON AND EVENING...WITH ISOLATED SHOWERS LIMITED TO THE MOUNTAINS. THE NEXT SYSTEM WILL BRING SNOW NEAR THE CASCADES LATE TONIGHT. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. A BROAD TROUGH WILL SEND A SERIES OF WAVES OVER THE PACIFIC NORTHWEST WITH A CHANCE OF PRECIPITATION EACH DAY AND BREEZY WINDS AT TIMES. THE STRONGEST SYSTEMS WILL BE SATURDAY AND MONDAY NIGHT/TUESDAY. ON SATURDAY SNOW LEVELS WILL BE LOW ENOUGH FOR RAIN SNOW MIX BELOW 1000 FEET IN THE MORNING...CHANGING TO RAIN SHOWERS IN THE AFTERNOON. OTHER AREAS WILL BE ALL SNOW IN THE MORNING...CHANGING TO A RAIN SNOW MIX BELOW 3000 FEET IN THE AFTERNOON. FOR THE REST OF THE WEEK EXPECT MOUNTAIN SNOW AND LOWER ELEVATION RAIN IN THE AFTERNOONS...WITH SNOW OR A RAIN/SNOW MIX POSSIBLE EVEN AT LOWER ELEVATIONS DURING THE NIGHT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME. WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. GRAPHICAL FORECASTS OF WEATHER HAZARDS OUT TO SEVEN DAYS ARE DISPLAYED ON THE WORLD WIDE WEB AT: WWW.WRH.NOAA.GOV/PENDLETON/CURRENTHAZARDS/HWO.HTML ALL LETTERS IN THE ABOVE URL ARE LOWER CASE...EXCEPT THE H IN CURRENTHAZARDS.
1 heavy snow. Local standard time, as filed.
Spotters reported 11 inches of snow at Trout Lake and 10 inches snow 5 miles west northwest of Appleton.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Washington in 2007Every state in 2007This day in weather historyWarnings in Washington, February 2007
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: 17398.