Alert archive / Idaho / Red Flag Warnings in 2023

Red Flag Warning 8, NWS Pocatello, ID

August 17, 2023Cassia County, Twin Falls County, Idaho

NWS Pocatello, ID issued this red flag warning at Aug 17, 2023, 9:12 AM MDT for Cassia County, Twin Falls County, Idaho. It took effect at Aug 17, 2023, 12:00 PM MDT. It was in force for 9 hr. 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 17, 2023, 9:12 AM MDT (15:12 UTC)
In effect from
Aug 17, 2023, 12:00 PM MDT
Expired
Aug 17, 2023, 9:00 PM MDT
In force
9 hr
Issued by
NWS Pocatello, ID

Counties Cassia County, ID, Twin Falls County, ID

The radar

The Pocatello radar (KSFX), 147 km from the middle of the area, began a volume at 15:16 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 12:00Z, 3.2 hours before the alert went out and 253 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 12:00Z on 2023-08-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 214 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 12:00Z on 2023-08-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -3 square meters per square second.1939Sfc1 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
214 J/kg
Mixed-layer CIN
-221 J/kg
Mixed-layer LCL
2434 m above ground
0-6 km bulk shear
3 kt
0-1 km storm-relative helicity
-3 m²/s²
0-3 km storm-relative helicity
12 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this red flag warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Pocatello, ID wrote its last area forecast discussion before this red flag warning went out at Aug 17, 2:53 AM MDT, 6 hours 19 minutes earlier.

Area forecast discussion, Aug 17, 2:53 AM MDT, 6 hours 19 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 17, 1:52 PM MDTSpecial Weather StatementPIHMinidoka23 min
Aug 17, 2:30 PM MDTSpecial Weather StatementPIHPower30 min
Aug 17, 3:09 PM MDTFlash Flood WarningPIHBannock, Power3 hr
Aug 17, 3:44 PM MDTFlash Flood WarningPIHPower3 hr
Aug 17, 4:53 PM MDTSpecial Weather StatementPIHBannock22 min

Nearby

Red Flag Warnings in Idaho, 2023Every red flag warning in 2023

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.