Alert archive / Washington / Severe Thunderstorm Warnings in 2003
Severe Thunderstorm Warning 4, NWS Pendleton, OR
NWS Pendleton, OR issued this severe thunderstorm warning at Apr 29, 2003, 6:26 PM PDT for Klickitat County, Washington. It was in force for 34 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Apr 29, 2003, 6:26 PM PDT (01:26 UTC)
- Expired
- Apr 29, 2003, 7:00 PM PDT
- In force
- 34 min
- Issued by
- NWS Pendleton, OR
- Area
- Counties, with a storm outline in the text
County Klickitat County, WA
The radar
The Pendleton radar (KPDT), 98 km from the middle of the area, began a volume at 01:29 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Salem/Mcnary, OR (KSLE), launched 00:00Z, 1.4 hours before the alert went out and 257 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 435 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 1379 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 45 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS56 KPDT 300126 CCA SVRPDT WAC039-300200- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PENDLETON OR 622 PM PDT TUE APR 29 2003 THE NATIONAL WEATHER SERVICE IN PENDLETON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHEASTERN KLICKITAT COUNTY IN CENTRAL WASHINGTON * UNTIL 700 PM PDT * AT 622 PM PDT...A NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER EAST CENTRAL KLICKITAT COUNTY...OR ABOUT 11 MILES EAST OF BICKLETON OR 22 MILES SOUTH OF GRANDVIEW...MOVING EAST AT 10 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... RURAL NORTHEASTERN KLICKITAT COUNTY AT 640 PM PDT RURAL EASTERN KLICKITAT COUNTY AT 650 PM PDT HAIL TO THE SIZE OF NICKELS IS LIKELY. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THE STORM HAS PASSED. LAT...LON 4605 12015 4587 12019 4584 11990 4601 11988 & $$
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, 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 this severe thunderstorm warning went out at Apr 29, 2:20 PM PDT, 4 hours 6 minutes earlier.
Area forecast discussion, Apr 29, 2:20 PM PDT, 4 hours 6 minutes before
NORTHEAST OREGON/SOUTHEAST WASHINGTON FORECAST DISCUSSION NATIONAL WEATHER SERVICE PENDLETON OR 220 PM PDT TUE APR 29 2003 CURRENT RADAR IMAGERY BEGINNING TO SHOW SIGNS OF SETTLING DOWN THIS EVENING. ONE AREA OF CONTINUED CONCERN IS YAKIMA VALLEY EASTWARD TO THE COLUMBIA BASIN SOUTH OF THE TRI-CITIES WHERE THE ATMOSPHERE CONINUES TO BE QUITE UNSTABLE. EXPECT THUNDERSTORM ACTIVITY HERE TO PERSIST THROUGH THE REST OF THE EVENING. THE SOUTHERN END OF THIS LINE...WHICH EXTENDES INTO THE SOUTHERN BLUE MOUNTAINS AND NORTHERN GRANT COUNTY IS IN SLIGHTLY MORE STABLE AIR...AND WILL LIKELY DIMISH. ISOLATED AREAS OF FOG ARE ALSO A POSSIBILITY OVERNIGHT...PARTICULARLY WHERE THE SKIES HAVE THE OPPORTUNITY TO CLEAR OUT. JR PDT 5321 ALW 5321 PSC 5321 YKM 5321 .KPDT...NONE.
Hazardous weather outlook, Apr 29, 5:20 AM PDT, 13 hours 6 minutes before
ORZ041>050-WAZ024>030-301300- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PENDLETON OR 520 AM PDT TUE APR 29 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL AND NORTHEAST OREGON AS WELL AS SOUTH CENTRAL AND SOUTHEAST WASHINGTON. .DAY ONE... THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. A SERIES OF WAVES ROTATING AROUND AN UPPER LOW OVER SOUTHWEST OREGON WILL BRING SCATTERED SHOWERS TO THE REGION TODAY AND TONIGHT. THE AIR MASS REMAINS UNSTABLE...AND ISOLATED THUNDERSTORMS ARE EXPECTED THIS AFTERNOON. SOME THUNDERSTORMS WILL PRODUCE HEAVY RAIN...SMALL HAIL...AND GUSTY WINDS. .DAYS TWO THROUGH SEVEN... THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. ALTHOUGH THE LOW PRESSURE SYSTEM WILL WEAKEN AS IT MOVES OVER THE PACIFIC NORTHWEST...IT WILL REMAIN STATIONARY THROUGH THURSDAY. SCATTERED SHOWERS AND ISOLATED AFTERNOON THUNDERSTORMS WILL CONTINUE WEDNESDAY. ANOTHER LOW PRESSURE SYSTEM WILL DROP SOUTHWARD FROM BRITISH COLUMBIA AND INTO THE PACIFIC NORTHWEST THIS WEEKEND FOR ANOTHER ROUND OF PRECIPITATION. DRIER CONDITIONS ARE EXPECTED MONDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED. WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
The office that day
Everything else NWS Pendleton, OR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 29, 6:25 PM PDT | Severe Thunderstorm Warning | PDT | Klickitat | 35 min |
| Apr 29, 9:12 PM PDT | Severe Thunderstorm Warning | PDT | Benton, Franklin | 18 min |
Nearby
Severe Thunderstorm Warnings in Washington, 2003Every severe thunderstorm warning in 2003
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.