Alert archive / Oregon / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 35, NWS Pendleton, OR
NWS Pendleton, OR issued this severe thunderstorm warning at Jul 24, 2002, 4:58 PM PDT for Wheeler County, Oregon. It was in force for 32 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 24, 2002, 4:58 PM PDT (23:58 UTC)
- Expired
- Jul 24, 2002, 5:30 PM PDT
- In force
- 32 min
- Issued by
- NWS Pendleton, OR
- Area
- Counties, with a storm outline in the text
County Wheeler County, OR
The radar
The Pendleton radar (KPDT), 122 km from the middle of the area, began a volume at 00:01 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 24, 5:07 PM PDT | Hail 1.25 | Kinzua, OR | Half-dollar size hail was reported by a weather spotter. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
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 12:00Z, 12.0 hours before the alert went out and 234 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 949 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- -3 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 242358 SVRPDT ORC069-250030- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PENDLETON OR 458 PM PDT WED JUL 24 2002 THE NATIONAL WEATHER SERVICE IN PENDLETON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTH CENTRAL WHEELER COUNTY IN CENTRAL OREGON * UNTIL 530 PM PDT * AT 458 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER KINZUA...OR ABOUT 23 MILES SOUTH OF CONDON...MOVING NORTHEAST AT 25 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... RURAL NORTHERN WHEELER COUNTY AT 510 PM PDT A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM PDT WEDNESDAY EVENING FOR NORTHEAST OREGON AND SOUTHEASTERN WASHINGTON. LAT...LON 4493 12016 4485 11993 4506 11980 4505 12010
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 Jul 24, 2:30 PM PDT, 2 hours 28 minutes earlier.
Area forecast discussion, Jul 24, 2:30 PM PDT, 2 hours 28 minutes before
NORTHEAST OREGON/SOUTHEAST WASHINGTON FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
230 PM PDT WED JUL 24 2002
FIRE WEATHER...THE ATMOSPHERE WILL BE MOIST ENOUGH FOR SOME RAIN
FROM THUNDERSTORMS THIS AFTERNOON...TONIGHT AND THURSDAY...BUT
THERE IS STILL A FIRE WEATHER CONCERN AS MOST OF THE RAIN WILL BE
LIGHT AND SPOTTY. POLAN
SHORT TERM...AN UNSTABLE ATMOSPHERE AND SUFFICIENT MID LEVEL
MOISTURE ARE IN PLACE ACROSS EASTERN OREGON AND SOUTHEAST
WASHINGTON. A SHORT WAVE WILL MOVE ACROSS EASTERN OREGON AND
SOUTHEAST WASHINGTON TONIGHT ALONG WITH A JET STREAK AROUND 30000
FEET CONTAINING 60-70 KNOT WINDS. THIS ENERGY WILL PROVIDE DYNAMIC
LIFT WHICH WILL TAP INTO THE INSTABILITY THUS PRODUCING SCATTERED
THUNDERSTORMS THIS AFTERNOON AND TONIGHT. MID LEVEL WIND SHEAR WILL
HELP SOME OF THE THUNDERSTORMS TO BECOME ORGANIZED WITH THE
POTENTIAL TO PRODUCE STRONG GUSTY WINDS AND LARGE HAIL.
THE UPPER LEVEL TROUGH WILL MOVE THROUGH THE REGION ON THURSDAY AND
WILL INTERACT WITH UNSTABLE AIR FOR ANOTHER ROUND OF THUNDERSTORMS.
THE AFOREMENTIONED UPPER TROUGH WILL SHIFT EAST OF THE FORECAST AREA
ON THURSDAY NIGHT AND THIS WILL ALLOW COOLER MARINE AIR IN THE
SURFACE LAYERS AND DRIER AND COOLER AIR ALOFT TO PUSH INTO SOUTHERN
WASHINGTON AND OREGON ON FRIDAY. POLAN
EXTENDED...ANOTHER STRONGER SHORT WAVE THAT WILL BE DIGGING DOWN
INTO THE PACIFIC NORTHWEST ON FRIDAY WILL BE IN IDAHO BY SATURDAY.
THICKNESSES WILL CONTINUE TO FALL INTO SATURDAY WITH THE PASSAGE OF
THIS SYSTEM...HELPING TO LOWER THE TEMPERATURES ACROSS EASTERN
OREGON AND WASHINGTON. MEANWHILE...THE MOISTURE ASSOCIATED WITH THIS
SYSTEM WILL PASS BY TO OUR NORTH AND EAST. ON SUNDAY...A RIDGE
BEGINS TO BUILD INTO THE PACIFIC NORTHWEST...BRINGING A DRY AND
STABLE ATMOSPHERE TO THE REGION. THIS WILL ALLOW TEMPERATURES TO
BEGIN TO SLOWLY RISE. ON MONDAY...A WEAK WAVE PASSES THROUGH THE
UPPER LEVEL RIDGE...FLATTENING THE RIDGE. HOWEVER...OREGON AND
SOUTHERN WASHINGTON WILL REMAIN DRY...WITH THE HIGH TEMPERATURES
CONTINUING TO RISE. DRY AND WARMING CONDITIONS CONTINUE ON
TUESDAY...AS THE RIDGE BECOMES WELL ESTABLISHED OVER THE PACIFIC
NORTHWEST. A TROUGH ALSO BEGINS TO DIG SOUTH INTO THE PACIFIC ON
TUESDAY...WHICH WILL HELP HURRICANE ELIDA RECURVE OVER COOLER SEA
SURFACE TEMPERATURE IN THE NORTHEAST PACIFIC. BY WEDNESDAY...THE
UPPER LEVEL TROUGH IS MOVING TOWARDS THE WEST COAST...TURNING THE
UPPER LEVEL FLOW TO THE SOUTHWEST. THE REMNANT LOW OF HURRICANE
ELIDA WILL BE CAUGHT UP IN THE UPPER LEVEL PATTERN WITH THE TROUGH
PUSH TOWARDS THE COAST. THIS PROVIDES A TROPICAL MOISTURE SOURCE
THAT BEGINS TO INFILTRATE SOUTHERN AND EASTERN OREGON ON
WEDNESDAY...THAT WILL PRODUCE THUNDERSTORMS EXTENDING NORTHEAST FROM
REDMOND TO THE BLUE AND WALLOWA MOUNTAINS WHILE THE REST OF THE CWA
WILL REMAIN DRY AND HOT. PALMER
PDT 3200 ALW 3300 PSC 3200 YKM 2200
KPDT...VCP21/PRECIP...OPERATIONAL.
.KPDT...FIRE WEATHER WATCH FOR DRY LIGHTNING FOR TONIGHT FOR THE
LOWER COLUMBIA BASIN AND THE FOOTHILLS OF THE BLUE MOUNTAINS
IN THE FOLLOWING COUNTIES:
WASHINGTON: KLICKITAT...BENTON...FRANKLIN...WALLA WALLA AND
COLUMBIA.
OREGON: GILLIAM...MORROW AND UMATILLA.The office that day
Everything else NWS Pendleton, OR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 5:55 PM PDT | Severe Thunderstorm Warning | PDT | Jefferson | 50 min |
| Jul 24, 4:33 PM PDT | Severe Thunderstorm Warning | PDT | Wallowa | 42 min |
| Jul 24, 4:37 PM PDT | Severe Thunderstorm Warning | PDT | Wallowa | 38 min |
| Jul 24, 4:41 PM PDT | Severe Thunderstorm Warning | PDT | Union | 49 min |
Nearby
Severe Thunderstorm Warnings in Oregon, 2002Every severe thunderstorm warning in 2002
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.