Alert archive / Montana / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 48, NWS Great Falls, MT

June 15, 2025Judith Basin County, Montana

NWS Great Falls, MT issued this severe thunderstorm warning at Jun 15, 2025, 3:23 PM MDT for Judith Basin County, Montana. It was in force for 37 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: Jun 15, 2025, 3:23 PM MDT (21:23 UTC)
Expired: Jun 15, 2025, 4:00 PM MDT
In force: 37 min
Issued by: NWS Great Falls, MT
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

County Judith Basin County, MT

The radar

The Great Falls radar (KTFX), 96 km from the middle of the area, began a volume at 21:22 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 15, 2:15 PM MDT	Severe Thunderstorm Watch	SPC	11 hr

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 9.4 hours before the alert went out and 304 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 47 J/kg
Mixed-layer CIN: -210 J/kg
Mixed-layer LCL: 1463 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 84 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

What forecasters said that day

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

NWS Great Falls, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 15, 11:09 AM MDT, 4 hours 14 minutes earlier.

Area forecast discussion, Jun 15, 11:09 AM MDT, 4 hours 14 minutes before

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In the hours before

Special weather statement, Jun 15, 1:16 PM MDT, 2 hours 7 minutes before

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Special weather statement, Jun 15, 1:34 PM MDT, 1 hour 49 minutes before

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Special weather statement, Jun 15, 1:46 PM MDT, 1 hour 37 minutes before

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Local storm report, Jun 15, 2:48 PM MDT, 35 minutes before

Preliminary Local Storm Report
National Weather Service Great Falls MT
248 PM MDT Sun Jun 15 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0205 PM     Hail             Benchland               47.08N 110.02W
06/15/2025  M1.00 Inch       Judith Basin       MT   Public

            Public report of quarter sized hail around
            Benchland.

&&

AM

Local storm report, Jun 15, 2:49 PM MDT, 34 minutes before

Preliminary Local Storm Report
National Weather Service Great Falls MT
249 PM MDT Sun Jun 15 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0210 PM     Hail             Benchland               47.08N 110.02W
06/15/2025  E1.75 Inch       Judith Basin       MT   Public

            Public caller updated with golf ball sized
            hail a few minutes after initial call.

&&

AM

Special weather statement, Jun 15, 3:16 PM MDT, 7 minutes before

Special Weather Statement
National Weather Service Great Falls MT
316 PM MDT Sun Jun 15 2025

MTZ309-310-312-152145-
Eastern Pondera and Eastern Teton MT-
Western and Central Chouteau County MT-
Cascade County below 5000ft MT-
316 PM MDT Sun Jun 15 2025

...STRONG THUNDERSTORMS WILL IMPACT SOUTHEASTERN TETON...WEST CENTRAL
CHOUTEAU AND NORTHWESTERN CASCADE COUNTIES THROUGH 345 PM MDT...

At 316 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Power to near Fort Shaw. Movement was east
at 35 mph.

HAZARD...Wind gusts up to 40 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Great Falls, Fort  Shaw, Fort Shaw, Power, Black Eagle, Vaughn,
Simms, Sun River, and First Peoples Buffalo Jump State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 4792 11120 4750 11129 4744 11199 4779 11189
TIME...MOT...LOC 2116Z 250DEG 29KT 4769 11178 4754 11185

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

Glinskas

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 14, 6:19 PM MDT	Special Weather Statement	TFX	Judith Basin	26 min
Jun 14, 6:26 PM MDT	Severe Thunderstorm Warning	TFX	Fergus, Judith Basin	49 min
Jun 14, 6:43 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	47 min
Jun 14, 6:49 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	43 min
Jun 14, 7:07 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Fergus, Judith Basin	53 min
Jun 14, 7:39 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	50 min
Jun 14, 7:56 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Blaine, Fergus	64 min
Jun 14, 8:20 PM MDT	Special Weather Statement	TFX	Meagher	40 min
Jun 14, 8:23 PM MDT	Special Weather Statement	TFX	Judith Basin	37 min
Jun 14, 8:27 PM MDT	Special Weather Statement	TFX		48 min
Jun 14, 8:57 PM MDT	Special Weather Statement	TFX	Blaine	48 min
Jun 14, 9:02 PM MDT	Special Weather Statement	TFX		43 min
Jun 14, 9:03 PM MDT	Special Weather Statement	TFX	Fergus	27 min
Jun 14, 9:29 PM MDT	Special Weather Statement	TFX	Meagher	46 min
Jun 14, 9:33 PM MDT	Special Weather Statement	TFX	Fergus	27 min
Jun 14, 9:49 PM MDT	Special Weather Statement	TFX	Blaine	26 min
Jun 14, 10:28 PM MDT	Special Weather Statement	TFX	Wheatland	32 min
Jun 14, 11:09 PM MDT	Special Weather Statement	TFX	Fergus	51 min
Jun 14, 11:21 PM MDT	Severe Thunderstorm Warning	TFX	Fergus, Judith Basin	39 min
Jun 14, 11:39 PM MDT	Severe Thunderstorm Warning	TFX	Judith Basin	36 min
Jun 14, 11:56 PM MDT	Special Weather Statement	TFX	Fergus	49 min
Jun 15, 12:09 AM MDT	Special Weather Statement	TFX	Fergus	51 min
Jun 15, 12:56 AM MDT	Special Weather Statement	TFX	Judith Basin	34 min
Jun 15, 1:02 AM MDT	Special Weather Statement	TFX	Fergus	43 min
Jun 15, 1:17 AM MDT	Severe Thunderstorm Warning	TFX	Fergus	42 min
Jun 15, 1:36 AM MDT	Special Weather Statement	TFX	Judith Basin	39 min
Jun 15, 1:48 AM MDT	Special Weather Statement	TFX	Chouteau	42 min
Jun 15, 2:13 AM MDT	Special Weather Statement	TFX	Judith Basin	47 min
Jun 15, 4:33 AM MDT	Special Weather Statement	TFX	Fergus	42 min
Jun 15, 4:53 AM MDT	Special Weather Statement	TFX		37 min
Jun 15, 5:10 AM MDT	Special Weather Statement	TFX	Petroleum	35 min
Jun 15, 11:49 AM MDT	Special Weather Statement	TFX	Blaine	56 min
Jun 15, 12:38 PM MDT	Special Weather Statement	TFX	Judith Basin	37 min
Jun 15, 1:16 PM MDT	Special Weather Statement	TFX	Fergus	29 min
Jun 15, 1:34 PM MDT	Special Weather Statement	TFX	Fergus	26 min
Jun 15, 1:46 PM MDT	Special Weather Statement	TFX	Judith Basin	29 min
Jun 15, 1:53 PM MDT	Severe Thunderstorm Warning	TFX	Judith Basin	25 min
Jun 15, 2:12 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Fergus, Judith Basin	33 min
Jun 15, 2:23 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	26 min
Jun 15, 2:33 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau	27 min
Jun 15, 3:05 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	25 min
Jun 15, 3:16 PM MDT	Special Weather Statement	TFX	Cascade	29 min
Jun 15, 3:23 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Teton	52 min
Jun 15, 3:49 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Teton	41 min
Jun 15, 3:51 PM MDT	Special Weather Statement	TFX	Chouteau	24 min
Jun 15, 3:56 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau	64 min
Jun 15, 4:22 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Cascade, Chouteau	38 min
Jun 15, 4:25 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	21 min
Jun 15, 4:29 PM MDT	Tornado Warning	TFX	Chouteau	31 min
Jun 15, 4:48 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Judith Basin, Meagher	27 min
Jun 15, 4:50 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Chouteau	55 min
Jun 15, 4:57 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Blaine, Chouteau, Fergus	33 min
Jun 15, 5:07 PM MDT	Severe Thunderstorm Warning	TFX	Judith Basin, Meagher	23 min
Jun 15, 5:15 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	35 min
Jun 15, 5:21 PM MDT	Special Weather Statement	TFX	Blaine	39 min
Jun 15, 5:29 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Fergus, Judith Basin	40 min
Jun 15, 5:41 PM MDT	Severe Thunderstorm Warning	TFX	Fergus, Judith Basin	64 min
Jun 15, 5:42 PM MDT	Special Weather Statement	TFX	Blaine	63 min
Jun 15, 5:44 PM MDT	Special Weather Statement	TFX	Meagher	46 min

Nearby

Severe Thunderstorm Warnings in Montana, 2025 Every severe thunderstorm warning in 2025

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.