Alert archive / Montana / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 48, NWS Great Falls, MT

July 13, 2024Hill County, Montana

NWS Great Falls, MT issued this severe thunderstorm warning at Jul 13, 2024, 3:18 PM MDT for Hill County, Montana. It was in force for 27 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
Jul 13, 2024, 3:18 PM MDT (21:18 UTC)
Expired
Jul 13, 2024, 3:45 PM MDT
In force
27 min
Issued by
NWS Great Falls, MT
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Hill County, MT

The radar

The Great Falls radar (KTFX), 161 km from the middle of the area, began a volume at 21:20 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 478 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 2024-07-13Temperature 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 2024-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -4 square meters per square second.19395878Sfc1 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
3028 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
-4 m²/s²
0-3 km storm-relative helicity
-9 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
Jul 13, 2:00 PM MDTSpecial Weather StatementTFXBlaine30 min
Jul 13, 2:18 PM MDTSevere Thunderstorm WarningTFXBlaine27 min
Jul 13, 2:30 PM MDTSpecial Weather StatementTFXHill30 min
Jul 13, 2:40 PM MDTSevere Thunderstorm WarningTFXBlaine35 min
Jul 13, 2:57 PM MDTSpecial Weather StatementTFXHill33 min
Jul 13, 3:09 PM MDTSevere Thunderstorm WarningTFXBlaine21 min
Jul 13, 3:29 PM MDTSevere Thunderstorm Warning Considerable damage threatTFXBlaine31 min
Jul 13, 3:47 PM MDTSevere Thunderstorm WarningTFXHill28 min
Jul 13, 3:57 PM MDTSevere Thunderstorm Warning Considerable damage threatTFXBlaine33 min
Jul 13, 4:13 PM MDTSevere Thunderstorm WarningTFXBlaine, Hill32 min
Jul 13, 4:42 PM MDTSevere Thunderstorm Warning Destructive damage threatTFXBlaine, Hill33 min
Jul 13, 4:59 PM MDTSevere Thunderstorm WarningTFXBlaine, Hill31 min
Jul 13, 5:14 PM MDTSevere Thunderstorm Warning Considerable damage threatTFXBlaine31 min
Jul 13, 5:22 PM MDTSpecial Weather StatementTFXBlaine23 min
Jul 13, 5:44 PM MDTSevere Thunderstorm Warning Considerable damage threatTFXBlaine31 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.