Alert archive / Washington / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 13, NWS Pendleton, OR
NWS Pendleton, OR issued this severe thunderstorm warning at Jul 7, 2002, 9:04 PM PDT for Benton County, Washington. It was in force for 41 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 7, 2002, 9:04 PM PDT (04:04 UTC)
- Expired
- Jul 7, 2002, 9:45 PM PDT
- In force
- 41 min
- Issued by
- NWS Pendleton, OR
- Area
- Counties, with a storm outline in the text
County Benton County, WA
The radar
The Pendleton radar (KPDT), 80 km from the middle of the area, began a volume at 04:08 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 7, 9:20 PM PDT | Hail 0.75 | Prosser, WA |
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 00:00Z, 4.1 hours before the alert went out and 282 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
- 1220 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- -5 m²/s²
- 0-3 km storm-relative helicity
- 57 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
453 WUUS56 KPDT 080404 SVRPDT WAC005-080445- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PENDLETON OR 904 PM PDT SUN JUL 7 2002 THE NATIONAL WEATHER SERVICE IN PENDLETON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHWESTERN BENTON COUNTY IN SOUTH CENTRAL WASHINGTON * UNTIL 945 PM PDT * AT 904 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 6 MILES SOUTHWEST OF PATERSON...OR ABOUT 21 MILES WEST OF HERMISTON...MOVING NORTH AT 50 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... PROSSER AT 920 PM PDT THIS IS A DANGEROUS STORM...CAPABLE OF PRODUCING LARGE HAIL... DAMAGING WINDS IN EXCESS OF 55 MPH...AND DEADLY LIGHTNING. IF YOU ARE IN ITS PATH...TAKE COVER IN A STURDY STRUCTURE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. LAT...LON 4585 11985 4592 11961 4631 11959 4629 11987
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 7, 8:30 PM PDT, 34 minutes earlier.
Area forecast discussion, Jul 7, 8:30 PM PDT, 34 minutes before
NORTHEAST OREGON/SOUTHEAST WASHINGTON FORECAST DISCUSSION NATIONAL WEATHER SERVICE PENDLETON OR 830 PM PDT SUN JUL 7 2002 A LOW PRESSURE SYSTEM IS CROSSING OVER THE CASCADES. THE SYSTEM IS LIFTING THE WARM MOIST LOW LEVEL AIR EAST OF THE CASCADES RESULTING IN SCATTERED THUNDERSTORMS. SEVERAL THUNDERSTORMS HAVE BEEN SEVERE WITH WITH .75 INCH HAIL AND WIND GUSTS IN EXCESS OF 50 MPH. THE STRONGEST WIND GUST REPORTED SO FAR IS 76 MPH AT THE PASCO AIRPORT. THESE WINDS HAVE REDUCED VISIBILITIES BRIEFLY TO AS LOW AS ONE QUARTER MILE IN THE COLUMBIA BASIN AND ALONG THE FOOTHILLS OF THE BLUES. THE FIRST BAND OF THUNDERSTORMS HAS MOVED INTO THE NORTHERN PORTION OF THE COLUMBIA BASIN. HOWEVER...A SECOND BAND OVER CENTRAL OREGON IS SHOWING SIGNS OF INCREASING IN INTENSITY AS IT MOVES NORTH THIS EVENING. PDT 3200 ALW 3200 PSC 3000 YKM 3000 KPDT...VCP21/CSR21...OPERATIONAL. .KPDT...NONE
The office that day
Everything else NWS Pendleton, OR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 7:11 PM PDT | Severe Thunderstorm Warning | PDT | Benton, Franklin | 49 min |
| Jul 7, 7:52 PM PDT | Severe Thunderstorm Warning | PDT | Franklin | 38 min |
| Jul 7, 9:40 PM PDT | Severe Thunderstorm Warning | PDT | Yakima | 50 min |
| Jul 7, 9:57 PM PDT | Severe Thunderstorm Warning | PDT | Benton, Franklin | 48 min |
| Jul 7, 11:21 PM PDT | Severe Thunderstorm Warning | PDT | Columbia | 69 min |
Nearby
Severe Thunderstorm Warnings in Washington, 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.