Alert archive / Washington / Severe Thunderstorm Watches in 1997
Severe Thunderstorm Watch 367
The Storm Prediction Center issued this severe thunderstorm watch at May 31, 1997, 10:00 AM PDT for 10 counties in Oregon; 16 counties in Washington. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- May 31, 1997, 10:00 AM PDT (17:00 UTC)
- Expired
- May 31, 1997, 4:00 PM PDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 26 counties
Baker County, OR, Crook County, OR, Gilliam County, OR, Grant County, OR, Morrow County, OR, Sherman County, OR, Umatilla County, OR, Union County, OR, Wallowa County, OR, Wheeler County, OR, Adams County, WA, Asotin County, WA, Benton County, WA, Chelan County, WA, Columbia County, WA, Douglas County, WA, Franklin County, WA, Garfield County, WA, Grant County, WA, Kittitas County, WA, Klickitat County, WA, Lincoln County, WA, Spokane County, WA, Walla Walla County, WA, Whitman County, WA, Yakima County, WA
The radar
The Pendleton radar (KPDT), 96 km from the middle of the area, began a volume at 17:02 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.
Warnings issued inside it
22 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 31, 10:28 AM PDT | Severe Thunderstorm Warning | PDT | Morrow, Umatilla | 62 min |
| May 31, 10:55 AM PDT | Severe Thunderstorm Warning | PDT | Crook | 65 min |
| May 31, 10:58 AM PDT | Severe Thunderstorm Warning | PDT | Morrow | 62 min |
| May 31, 11:13 AM PDT | Severe Thunderstorm Warning | OTX | Grant | 62 min |
| May 31, 11:25 AM PDT | Severe Thunderstorm Warning | PDT | Morrow, Umatilla | 65 min |
| May 31, 11:31 AM PDT | Severe Thunderstorm Warning | OTX | Adams | 29 min |
| May 31, 11:45 AM PDT | Flash Flood Warning | PDT | Morrow | 2 hr |
| May 31, 11:54 AM PDT | Severe Thunderstorm Warning | PDT | Columbia, Walla Walla | 51 min |
| May 31, 11:58 AM PDT | Severe Thunderstorm Warning | OTX | Adams | 62 min |
| May 31, 12:14 PM PDT | Severe Thunderstorm Warning | OTX | Lincoln | 61 min |
| May 31, 12:25 PM PDT | Severe Thunderstorm Warning | PDT | Umatilla | 50 min |
| May 31, 12:45 PM PDT | Severe Thunderstorm Warning | OTX | Garfield, Whitman | 60 min |
| May 31, 1:05 PM PDT | Severe Thunderstorm Warning | PDT | Union | 55 min |
| May 31, 1:06 PM PDT | Severe Thunderstorm Warning | PDT | Union | 54 min |
| May 31, 1:10 PM PDT | Severe Thunderstorm Warning | PDT | Union | 50 min |
| May 31, 1:15 PM PDT | Severe Thunderstorm Warning | PDT | Umatilla | 60 min |
| May 31, 1:15 PM PDT | Severe Thunderstorm Warning | OTX | Spokane | 60 min |
| May 31, 1:25 PM PDT | Flash Flood Warning | PDT | Umatilla | 2 hr |
| May 31, 1:39 PM PDT | Flash Flood Warning | OTX | Asotin, Whitman | 66 min |
| May 31, 1:39 PM PDT | Severe Thunderstorm Warning | OTX | Asotin, Whitman | 66 min |
| May 31, 2:25 PM PDT | Flash Flood Warning | PDT | Columbia | 110 min |
| May 31, 2:29 PM PDT | Severe Thunderstorm Warning | PDT | Wallowa | 61 min |
The nearest sounding before it
Spokane, WA (KOTX), launched 12:00Z, 5.0 hours before the alert went out and 209 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
- 11 J/kg
- Mixed-layer CIN
- -225 J/kg
- Mixed-layer LCL
- 1213 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 146 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 31, 12:45 PM PDT | Tornado Watch | SPC | Baker, Umatilla, Union, Wallowa | 6 hr |
Nearby
Severe Thunderstorm Watches in Washington, 1997Severe Thunderstorm Watches in Oregon, 1997Every severe thunderstorm watch in 1997
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.