1 heavy snow, as filed by the National Weather Service.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
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 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 10, 1:30 AM PST, 5 hours 30 minutes earlier.
NORTHEAST OREGON/SOUTHEAST WASHINGTON FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR...CORRECTED TO ADD SNOW ADV...
230 AM PDT TUE APR 10 2001
WINTER RETURNS TO THE OREGON MOUNTAINS TONIGHT AND WEDNESDAY. TWO
SYSTEMS TO DEAL WITH NEXT 24 TO 36 HOURS. PACIFIC SYSTEM APPROACHING
THE COAST AND COLD BRITISH COLUMBIA SYSTEM DIVING SOUTH TODAY. NOT
MUCH WILL HAPPEN OVER THE FORECAST AREA TODAY AS THE SYSTEMS WILL BE
IN TRANSIT INTO THE REGION. JUST THICKENING CLOUD COVER OVER THE
REGION WITH SOME SCATTERED AFTERNOON SHOWERS. THE ACTION WILL PICK
UP THIS EVENING INTO TONIGHT AS AN UPPER LOW DEVELOPS OVER SOUTHERN
WASHINGTON/NORTHERN OREGON THIS EVENING AND TRACKS SOUTH OVERNIGHT.
END RESULT WILL BE SNOW OVER THE BLUE MOUNTAINS THIS EVENING...THEN
TRACKING SOUTH AND SPREADING SNOW OVER THE EAST SLOPES OF THE OREGON
CASCADES AND THE OCHOCO MOUNTAINS OVERNIGHT THEN INTO THE WALLOWA
MOUNTAINS WEDNESDAY. PLENTY OF UPWARD MOTION AND QPF (AMOUNTS
BETWEEN .5-1.0 INCHE) WITH THIS SYSTEM AS IT MOVES THROUGH SO WILL
GO AHEAD AND ISSUE A SNOW ADVISORY FOR THE BLUES 6-10 INCHES
TONIGHT...THE FOOTHILLS OF THE BLUES 2-3 INCHES AND THE EAST SLOPES
OF THE OREGON CASCADES...THE GRANDE RONDE VALLEY AND JOHN DAY
HIGHLANDS 3-5 INCHES LATE TONIGHT INTO EARLY WEDNESDAY...AND A HEAVY
SNOW WARNING FOR THE OCHOCO AND WALLOWA MOUNTAINS 6-10 INCHES LATE
TONIGHT INTO WEDNESDAY. SNOW LEVELS SHOULD DROP TO NEAR 2000 FEET
WITH SOME LOCATIONS ALONG THE FOOTHILLS OF THE BLUES DOWN NEAR 1500
FEET. SCATTERED SHOWERS WILL CONTINUE OVER THE WASHINGTON SECTIONS
OF THE FORECAST AREA WEDNESDAY MORNING THAN END AS DRY NORTHEASTERLY
FLOW DEVELOPS. SCATTERED SHOWERS WILL CONTINUE OVER MUCH OF OREGON
THROUGH THE DAY WEDNESDAY AS THE UPPER LOW MOVES OFF TO THE SOUTH.
IN THE EXTENDED...DRY NORTHERLY FLOW OVER THE REGION WEDNESDAY NIGHT
FOR SOME CLEARING SKIES AND RATHER COOL TEMPERATURES. THEN THE FIRST
IN A SERIES OF SYSTEMS WILL MOVE THROUGH THE REGION WEDNESDAY...
KEEPING A CHANCE OF SHOWERS THROUGH THE REMAINDER OF THE EXTENDED.
MEAD
PDT 586 ALW 586 PSC 363 YKM 263
.KPDT...WSR-88D...VCP32/CSR21...OPERATIONAL.
.KPDT...SNOW ADVISORY FOR OR ZONE 46 AND WA ZONE 30 TONIGHT...
...SNOW ADVISORY FOR OR ZONE 42-43-45-47-49 AND WA ZONE 29
LATE TONIGHT INTO EARLY WEDNESDAY...
...HEAVY SNOW WARNING FOR OR ZONES 48 AND 50 FOR LATE TONIGHT ;
AND WEDNESDAY...The national radar mosaic for the moment the first event began.
1 heavy snow. Local standard time, as filed.
A late season storm brought heavy snow to elevations above 4000 feet in the Blue Mountains of Southeast Washington. A SNOTEL site located 20 miles east of Walla Walla at an elevation of 5000 feet measured between 10 and 14 inches of snow.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Washington in 2001Every state in 2001This day in weather historyWarnings in Washington, April 2001
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: 5240494.