Alert archive / Oregon / Severe Thunderstorm Watches in 2020
Severe Thunderstorm Watch 236
The Storm Prediction Center issued this severe thunderstorm watch at May 30, 2020, 11:52 AM PDT for 15 counties in Oregon; 7 counties in Washington. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- May 30, 2020, 11:52 AM PDT (18:52 UTC)
- Expired
- May 30, 2020, 7:00 PM PDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 75 kt
All 22 counties
Crook County, OR, Deschutes County, OR, Gilliam County, OR, Grant County, OR, Harney County, OR, Jefferson County, OR, Klamath County, OR, Lake County, OR, Morrow County, OR, Sherman County, OR, Umatilla County, OR, Union County, OR, Wallowa County, OR, Wasco County, OR, Wheeler County, OR, Benton County, WA, Columbia County, WA, Franklin County, WA, Kittitas County, WA, Klickitat County, WA, Walla Walla County, WA, Yakima County, WA
The radar
The Pendleton radar (KPDT), 218 km from the middle of the area, began a volume at 18:52 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 SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 20%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 70%
- One or more gusts of 65 knots or more
- 70%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 40%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
20 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 30, 12:17 PM PDT | Severe Thunderstorm Warning | MFR | Klamath | 43 min |
| May 30, 12:51 PM PDT | Severe Thunderstorm Warning | MFR | Klamath | 24 min |
| May 30, 12:54 PM PDT | Severe Thunderstorm Warning | PDT | Deschutes | 66 min |
| May 30, 12:57 PM PDT | Severe Thunderstorm Warning | PDT | Crook, Wheeler | 48 min |
| May 30, 1:42 PM PDT | Severe Thunderstorm Warning | PDT | Deschutes, Jefferson | 48 min |
| May 30, 1:51 PM PDT | Severe Thunderstorm Warning | PDT | Crook, Deschutes | 39 min |
| May 30, 2:05 PM PDT | Severe Thunderstorm Warning | PDT | Grant, Wheeler | 40 min |
| May 30, 2:24 PM PDT | Severe Thunderstorm Warning | PDT | Deschutes, Jefferson | 51 min |
| May 30, 2:34 PM PDT | Severe Thunderstorm Warning | PDT | Crook, Jefferson | 41 min |
| May 30, 2:41 PM PDT | Severe Thunderstorm Warning | PDT | Gilliam, Grant, Morrow, Wheeler | 49 min |
| May 30, 2:58 PM PDT | Severe Thunderstorm Warning | PDT | Jefferson, Sherman, Wasco | 47 min |
| May 30, 3:10 PM PDT | Severe Thunderstorm Warning | PDT | Gilliam, Jefferson, Sherman, Wasco, Wheeler | 50 min |
| May 30, 3:20 PM PDT | Severe Thunderstorm Warning | PDT | Morrow, Umatilla | 55 min |
| May 30, 3:22 PM PDT | Flash Flood Warning | PDT | Jefferson, Wasco | 4 hr |
| May 30, 3:46 PM PDT | Severe Thunderstorm Warning | PDT | Umatilla | 59 min |
| May 30, 3:55 PM PDT | Severe Thunderstorm Warning | PDT | Gilliam, Morrow | 50 min |
| May 30, 3:58 PM PDT | Severe Thunderstorm Warning | PDT | Gilliam, Sherman, Wasco | 47 min |
| May 30, 4:10 PM PDT | Severe Thunderstorm Warning | PDT | Umatilla | 65 min |
| May 30, 4:45 PM PDT | Severe Thunderstorm Warning | PDT | Gilliam, Morrow | 60 min |
| May 30, 5:10 PM PDT | Severe Thunderstorm Warning | PDT | Umatilla | 65 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 30, 11:20 AM PDT | Mesoscale Discussion | SPC | Crook, Deschutes, Gilliam, Grant, Hood River, Jefferson and 7 more | 115 min |
| May 30, 3:13 PM PDT | Mesoscale Discussion | SPC | Gilliam, Morrow, Sherman, Umatilla, Union, Wasco and 1 more | 2 hr |
| May 30, 4:22 PM PDT | Severe Thunderstorm Watch | SPC | Adams, Asotin, Chelan, Douglas, Ferry, Garfield and 7 more | 5 hr |
Nearby
Severe Thunderstorm Watches in Oregon, 2020Severe Thunderstorm Watches in Washington, 2020Every severe thunderstorm watch in 2020
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.