Alert archive / Oregon / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 11, NWS Boise, ID
NWS Boise, ID issued this severe thunderstorm warning at Aug 1, 2011, 5:51 PM PDT for Baker County, Oregon. It was in force for 39 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 1, 2011, 5:51 PM PDT (00:51 UTC)
- Expired
- Aug 1, 2011, 6:30 PM PDT
- In force
- 39 min
- Issued by
- NWS Boise, ID
- Area
- Storm-based polygon
County Baker County, OR
The radar
The Pendleton radar (KPDT), 143 km from the middle of the area, began a volume at 00:54 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.
The nearest sounding before it
Boise Airport, ID (KBOI), launched 00:00Z, 0.9 hours before the alert went out and 173 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
- 91 J/kg
- Mixed-layer CIN
- -139 J/kg
- Mixed-layer LCL
- 3245 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 13 m²/s²
- 0-3 km storm-relative helicity
- 58 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Boise, ID wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 1, 1:34 PM PDT, 4 hours 17 minutes earlier.
Area forecast discussion, Aug 1, 1:34 PM PDT, 4 hours 17 minutes before
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Special weather statement, Aug 1, 5:32 PM PDT, 19 minutes before
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</html>Local storm report, Aug 1, 5:42 PM PDT, 9 minutes before
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</html>The office that day
Everything else NWS Boise, ID issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 5:32 PM PDT | Special Weather Statement | BOI | Baker | 43 min |
Nearby
Severe Thunderstorm Warnings in Oregon, 2011Every severe thunderstorm warning in 2011
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.