Alert archive / Idaho / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 46, NWS Boise, ID

August 26, 20204 counties in Idaho

NWS Boise, ID issued this severe thunderstorm warning at Aug 26, 2020, 6:49 PM MDT for 4 counties in Idaho. It was in force for 41 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 26, 2020, 6:49 PM MDT (00:49 UTC)
Expired
Aug 26, 2020, 7:30 PM MDT
In force
41 min
Issued by
NWS Boise, ID
Area
Storm-based polygon
Hail
1.75 in
Wind
60.0 mph

Counties Elmore County, ID, Gooding County, ID, Owyhee County, ID, Twin Falls County, ID

The radar

The Boise radar (KCBX), 108 km from the middle of the area, began a volume at 00:47 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

Salt Lake City I, UT (KSLC), launched 00:00Z, 0.8 hours before the alert went out and 360 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, Salt Lake City I, UT at 00:00Z on 2020-08-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 102 joules per kilogram.LCLLFCEL10008507005003002001001 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, Salt Lake City I, UT at 00:00Z on 2020-08-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 43 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
102 J/kg
Mixed-layer CIN
-73 J/kg
Mixed-layer LCL
3605 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
43 m²/s²
0-3 km storm-relative helicity
110 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 26, 6:19 PM MDTSevere Thunderstorm WarningBOIElmore, Owyhee41 min
Aug 26, 7:21 PM MDTSevere Thunderstorm WarningBOIElmore, Gooding, Jerome, Owyhee, Twin Falls39 min
Aug 26, 7:55 PM MDTSpecial Weather StatementBOIGooding35 min
Aug 26, 8:22 PM MDTSpecial Weather StatementBOIBoise53 min
Aug 26, 10:41 PM MDTSpecial Weather StatementBOI49 min
Aug 26, 10:54 PM MDTSpecial Weather StatementBOICanyon51 min
Aug 27, 3:42 AM MDTSpecial Weather StatementBOIOwyhee48 min
Aug 27, 6:20 AM MDTRed Flag WarningBOIAda, Boise, Camas, Canyon, Elmore, Gem and 6 more14 hr
Aug 26, 6:21 PM MDTSpecial Weather StatementBOIBaker39 min
Aug 26, 6:49 PM MDTSpecial Weather StatementBOIHarney41 min
Aug 26, 7:09 PM MDTSpecial Weather StatementBOIBaker51 min
Aug 26, 7:26 PM MDTSpecial Weather StatementBOIHarney49 min
Aug 26, 8:23 PM MDTSpecial Weather StatementBOIHarney52 min
Aug 26, 8:48 PM MDTSpecial Weather StatementBOIMalheur42 min
Aug 26, 10:00 PM MDTSpecial Weather StatementBOIMalheur45 min
Aug 26, 10:22 PM MDTSpecial Weather StatementBOIMalheur38 min

Nearby

Severe Thunderstorm Warnings in Idaho, 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.