Alert archive / Montana / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 87, NWS Great Falls, MT

August 16, 2024Pondera County, Toole County, Montana

NWS Great Falls, MT issued this severe thunderstorm warning at Aug 16, 2024, 3:15 PM MDT for Pondera County, Toole County, Montana. It was in force for 45 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 16, 2024, 3:15 PM MDT (21:15 UTC)
Expired
Aug 16, 2024, 4:00 PM MDT
In force
45 min
Issued by
NWS Great Falls, MT
Area
Storm-based polygon
Hail
1.5 in
Wind
60.0 mph

Counties Pondera County, MT, Toole County, MT

The radar

The Great Falls radar (KTFX), 117 km from the middle of the area, began a volume at 21:19 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

Spokane, WA (KOTX), launched 12:00Z, 9.3 hours before the alert went out and 340 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, Spokane, WA at 12:00Z on 2024-08-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Spokane, WA at 12:00Z on 2024-08-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 13 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1412 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
13 m²/s²
0-3 km storm-relative helicity
21 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Great Falls, MT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 15, 6:45 PM MDTSpecial Weather StatementTFXBeaverhead45 min
Aug 15, 6:55 PM MDTSpecial Weather StatementTFXJefferson50 min
Aug 15, 7:29 PM MDTSpecial Weather StatementTFXMadison31 min
Aug 15, 8:00 PM MDTSpecial Weather StatementTFXBroadwater30 min
Aug 15, 8:23 PM MDTSpecial Weather StatementTFXLewis and Clark37 min
Aug 15, 8:34 PM MDTSpecial Weather StatementTFXTeton26 min
Aug 15, 9:01 PM MDTSpecial Weather StatementTFXLewis and Clark29 min
Aug 15, 10:27 PM MDTSpecial Weather StatementTFXCascade33 min
Aug 15, 11:05 PM MDTSpecial Weather StatementTFXCascade25 min
Aug 16, 2:38 PM MDTSpecial Weather StatementTFXPondera52 min
Aug 16, 2:44 PM MDTSevere Thunderstorm WarningTFXPondera, Toole31 min
Aug 16, 4:00 PM MDTSpecial Weather StatementTFXToole45 min
Aug 16, 5:56 PM MDTSpecial Weather StatementTFXLiberty34 min

Nearby

Severe Thunderstorm Warnings in Montana, 2024Every severe thunderstorm warning in 2024

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.