Alert archive / Oregon / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 40, NWS Boise, ID

August 25, 2020Malheur County, Oregon

NWS Boise, ID issued this severe thunderstorm warning at Aug 25, 2020, 6:53 PM MDT for Malheur County, Oregon. It was in force for 22 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 25, 2020, 6:53 PM MDT (00:53 UTC)
Expired
Aug 25, 2020, 7:15 PM MDT
In force
22 min
Issued by
NWS Boise, ID
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

County Malheur County, OR

The radar

The Boise radar (KCBX), 117 km from the middle of the area, began a volume at 00:56 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 122 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.

Skew-T log-pSkew-T log-p diagram, Boise Airport, ID at 00:00Z on 2020-08-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 241 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Boise Airport, ID at 00:00Z on 2020-08-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 19 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
241 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
2900 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
19 m²/s²
0-3 km storm-relative helicity
106 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The office that day

Everything else NWS Boise, ID issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 25, 6:15 PM MDTSpecial Weather StatementBOI45 min
Aug 25, 6:44 PM MDTSpecial Weather StatementBOICamas31 min
Aug 25, 7:54 PM MDTSpecial Weather StatementBOITwin Falls51 min
Aug 25, 8:19 PM MDTSpecial Weather StatementBOIAdams41 min
Aug 25, 8:21 PM MDTSpecial Weather StatementBOITwin Falls39 min
Aug 26, 8:12 AM MDTRed Flag WarningBOIIdaho, Owyhee, Twin Falls, Valley16 hr
Aug 26, 4:07 PM MDTSpecial Weather StatementBOITwin Falls53 min
Aug 26, 4:24 PM MDTSpecial Weather StatementBOIGooding51 min
Aug 26, 4:42 PM MDTSpecial Weather StatementBOIOwyhee48 min
Aug 26, 4:55 PM MDTSevere Thunderstorm WarningBOIOwyhee50 min
Aug 26, 5:16 PM MDTSevere Thunderstorm WarningBOIOwyhee44 min
Aug 26, 5:27 PM MDTSevere Thunderstorm WarningBOIOwyhee25 min
Aug 26, 5:48 PM MDTSevere Thunderstorm WarningBOIOwyhee42 min
Aug 25, 7:38 PM MDTSpecial Weather StatementBOIBaker52 min

Nearby

Severe Thunderstorm Warnings in Oregon, 2020Every severe thunderstorm warning 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.