Alert archive / Oregon / Severe Thunderstorm Watches in 2003
Severe Thunderstorm Watch 428
The Storm Prediction Center issued this severe thunderstorm watch at May 24, 2003, 1:45 PM PDT for 13 counties in Oregon; 6 counties in Washington. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- May 24, 2003, 1:45 PM PDT (20:45 UTC)
- Expired
- May 24, 2003, 7:00 PM PDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
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, Wheeler County, OR, Benton County, WA, Columbia County, WA, Franklin County, WA, Garfield County, WA, Klickitat County, WA, Walla Walla County, WA
The radar
The Pendleton radar (KPDT), 191 km from the middle of the area, began a volume at 20:45 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
5 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 24, 2:10 PM PDT | Severe Thunderstorm Warning | PDT | Umatilla | 65 min |
| May 24, 3:07 PM PDT | Severe Thunderstorm Warning | PDT | Umatilla | 53 min |
| May 24, 3:13 PM PDT | Severe Thunderstorm Warning | PDT | Union | 62 min |
| May 24, 3:21 PM PDT | Severe Thunderstorm Warning | PDT | Crook | 54 min |
| May 24, 6:00 PM PDT | Flash Flood Warning | PDT | Grant | 2 hr |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Salem/Mcnary, OR (KSLE), launched 12:00Z, 8.8 hours before the alert went out and 245 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
- 965 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- -8 m²/s²
- 0-3 km storm-relative helicity
- 86 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 24, 12:20 PM PDT | Mesoscale Discussion | SPC | Crook, Deschutes, Gilliam, Grant, Morrow, Sherman and 3 more | 115 min |
| May 24, 4:40 PM PDT | Mesoscale Discussion | SPC | Crook, Deschutes, Gilliam, Grant, Harney, Morrow and 4 more | 95 min |
Nearby
Severe Thunderstorm Watches in Oregon, 2003Severe Thunderstorm Watches in Washington, 2003Every severe thunderstorm watch in 2003
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.