Alert archive / Washington / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 15, NWS Pendleton, OR
NWS Pendleton, OR issued this severe thunderstorm warning at Jul 7, 2002, 9:57 PM PDT for Benton County, Franklin County, Washington. It was in force for 48 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 7, 2002, 9:57 PM PDT (04:57 UTC)
- Expired
- Jul 7, 2002, 10:45 PM PDT
- In force
- 48 min
- Issued by
- NWS Pendleton, OR
- Area
- Counties, with a storm outline in the text
Counties Benton County, WA, Franklin County, WA
The radar
The Pendleton radar (KPDT), 82 km from the middle of the area, began a volume at 05:01 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 7, 10:15 PM PDT | Hail 0.75 | Hanford, 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.
The nearest sounding before it
Spokane, WA (KOTX), launched 00:00Z, 5.0 hours before the alert went out and 258 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
- 221 J/kg
- Mixed-layer CIN
- -242 J/kg
- Mixed-layer LCL
- 2320 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 75 m²/s²
- 0-3 km storm-relative helicity
- 150 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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, 1 hour 27 minutes earlier.
Area forecast discussion, Jul 7, 8:30 PM PDT, 1 hour 27 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, 5:04 PM PDT | Severe Thunderstorm Warning | PDT | Union | 56 min |
| Jul 7, 5:27 PM PDT | Severe Thunderstorm Warning | PDT | Crook, Jefferson | 33 min |
| Jul 7, 6:02 PM PDT | Severe Thunderstorm Warning | PDT | Umatilla, Union | 43 min |
| Jul 7, 6:03 PM PDT | Severe Thunderstorm Warning | PDT | Jefferson, Wasco | 27 min |
| Jul 7, 6:28 PM PDT | Severe Thunderstorm Warning | PDT | Gilliam, Sherman | 47 min |
| Jul 7, 6:31 PM PDT | Severe Thunderstorm Warning | PDT | Umatilla, Union | 44 min |
| Jul 7, 8:52 PM PDT | Severe Thunderstorm Warning | PDT | Morrow | 28 min |
| Jul 7, 10:08 PM PDT | Severe Thunderstorm Warning | PDT | Union | 52 min |
| Jul 7, 10:44 PM PDT | Severe Thunderstorm Warning | PDT | Union | 46 min |
| Jul 7, 11:21 PM PDT | Severe Thunderstorm Warning | PDT | Wallowa | 69 min |
| Jul 8, 1:52 AM PDT | Severe Thunderstorm Warning | PDT | Wallowa | 23 min |
| Jul 8, 2:16 AM PDT | Severe Thunderstorm Warning | PDT | Wallowa | 44 min |
| 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, 9:04 PM PDT | Severe Thunderstorm Warning | PDT | Benton | 41 min |
| Jul 7, 9:40 PM PDT | Severe Thunderstorm Warning | PDT | Yakima | 50 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.