Alert archive / Montana / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 21, NWS Glasgow, MT
NWS Glasgow, MT issued this severe thunderstorm warning at May 26, 2026, 6:03 PM MDT for 4 counties in Montana. It was in force for 57 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 26, 2026, 6:03 PM MDT (00:03 UTC)
- Expired
- May 26, 2026, 7:00 PM MDT
- In force
- 57 min
- Issued by
- NWS Glasgow, MT
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties McCone County, MT, Richland County, MT, Roosevelt County, MT, Valley County, MT
The radar
The Glasgow radar (KGGW), 83 km from the middle of the area, began a volume at 00:06 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 26, 6:20 PM MDT | TSTM WND GST 56 | 7 Nw Wolf Point, MT | Wolf Point NW, MT (UMT - GGW) Elev: 2231.0 ft; Lat/Lon: 48.17452/-105.73792. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 0.1 hours before the alert went out and 82 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.
- Mixed-layer CAPE
- 667 J/kg
- Mixed-layer CIN
- -103 J/kg
- Mixed-layer LCL
- 3028 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -15 m²/s²
- 0-3 km storm-relative helicity
- 79 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
534 WUUS55 KGGW 270003 SVRGGW MTC055-083-085-105-270100- /O.NEW.KGGW.SV.W.0021.260527T0003Z-260527T0100Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Glasgow MT 603 PM MDT Tue May 26 2026 The National Weather Service in Glasgow has issued a * Severe Thunderstorm Warning for... Southwestern Roosevelt County in northeastern Montana... East central Valley County in northeastern Montana... Northeastern McCone County in northeastern Montana... Western Richland County in northeastern Montana... * Until 700 PM MDT. * At 603 PM MDT, a severe thunderstorm was located 10 miles southwest of Poplar, moving northwest at 30 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Wolf Point, Poplar, Lustre, Frazer, Volt, and Oswego. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Wind damage with this storm will occur before any rain or lightning. Do not wait for the sound of thunder before taking cover. SEEK SHELTER IMMEDIATELY inside a sturdy structure and stay away from windows. && LAT...LON 4791 10513 4789 10605 4842 10600 4841 10524 TIME...MOT...LOC 0003Z 137DEG 25KT 4800 10535 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ RDJ
1 follow-up statement
760 WWUS55 KGGW 270056 SVSGGW Severe Weather Statement National Weather Service Glasgow MT 656 PM MDT Tue May 26 2026 MTC055-083-085-105-270105- /O.EXP.KGGW.SV.W.0021.000000T0000Z-260527T0100Z/ Roosevelt MT-Valley MT-McCone MT-Richland MT- 656 PM MDT Tue May 26 2026 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN ROOSEVELT...EAST CENTRAL VALLEY...NORTHEASTERN MCCONE AND WESTERN RICHLAND COUNTIES WILL EXPIRE AT 700 PM MDT... The storm which prompted the warning has weakened below severe limits, and no longer poses an immediate threat to life or property. Therefore, the warning will be allowed to expire. However, gusty winds are still possible with this thunderstorm. && LAT...LON 4791 10513 4789 10605 4842 10600 4841 10524 TIME...MOT...LOC 0055Z 137DEG 25KT 4824 10569 $$ RDJ
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 Glasgow, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at May 26, 2:25 PM MDT, 3 hours 38 minutes earlier. Its key messages:
- Hot temperatures continue though at least Friday with highs in the 90s to around 100 degrees.
- Gusty southeast winds starting Tuesday will lead to critical fire weather in areas of dry fuels and a hazard to small craft on Fort Peck Lake.
- After the isolated thunderstorms early this evening, the next chance arrives this weekend with the best chances west of Highway 24.
Area forecast discussion, May 26, 2:25 PM MDT, 3 hours 38 minutes before
Area Forecast Discussion National Weather Service Glasgow MT 225 PM MDT Tue May 26 2026 .KEY MESSAGES... - Hot temperatures continue though at least Friday with highs in the 90s to around 100 degrees. - Gusty southeast winds starting Tuesday will lead to critical fire weather in areas of dry fuels and a hazard to small craft on Fort Peck Lake. - After the isolated thunderstorms early this evening, the next chance arrives this weekend with the best chances west of Highway 24. && .DISCUSSION... WEATHER PATTERN OVERVIEW: Afternoon temperatures are expected to remain in the 90s and low 100s through Friday as an upper ridge sets up from now through Friday. Nighttime temperatures will also be warm. All temps are expected to challenge records. Isolated thunderstorms will hang around an area from the southeast zones to the north-central zones with movement parallel to that through about 9 or 10 pm. Winds and brief heavy rain will be the greatest threats. There is a chance of thunderstorms like these in the southwest part of the area as well. Wednesday and Thursday are expected to be similar to today, with most convection confined to the western part of the area though. There is critical fire weather, strong winds over Fort Peck Lake, and intense heat over the area the next few days, so various weather products have been issued for all these hazards. For Saturday, high PWAT values (1 to 1.3 inches) are expected in the atmosphere over the area, so thunderstorms that occur this day will be prone to heavy downpours. So far, the deterministic GFS has these values dropping back down below one inch by Sunday afternoon. Overall, there are at least isolated thunderstorms possible each day through June 3rd, and temperatures will drop into the 70s and 80s for highs thankfully. FORECAST CONFIDENCE & DEVIATIONS: Only deviation was to increase PoPs to reflect CAMs through late this evening. There is high confidence in hot temperatures (90 or above) through Friday for at least a few locations. Low temperatures will struggle to drop below the mid 60s as well, so adequate water intake will be important. There is moderate confidence in thunderstorms bringing strong wind gusts to a few locations today, and low confidence for these type of gusts on Wednesday. There is moderate to high confidence in isolated to scattered thunderstorms occurring somewhere in the area from Friday through early June. There is high confidence in the Red Flag Warnings, the Heat Advisories, and the Lake Wind Advisory products. && .AVIATION... LAST UPDATED: 2020Z. FLIGHT CAT RANGE: VFR, but small chance of MVFR at KOLF. DISCUSSION: Isolated thunderstorms will bring erratic winds and possible brief MVFR conditions through 01Z Wednesday mainly at KOLF. DENSITY ALTITUDE: Will be high due to near 100 degrees temps creating thinner air in the afternoons through Friday. Temperatures of 100-105 are expected to occur near KOLF. WIND: Southeast at 15 to 25 knots with gusts to 35 knots. EQUIPMENT: KSDY obs are unavailable and will be AMD NOT SKED. && .GGW WATCHES/WARNINGS/ADVISORIES... Lake Wind Advisory until 6 AM MDT Thursday for Central and Southeast Phillips-Central and Southern Valley-Garfield-McCone- Petroleum. Heat Advisory until 9 PM MDT this evening for Central and Southeast Phillips-Central and Southern Valley-Daniels-Dawson- Eastern Roosevelt-Garfield-McCone-Northern Phillips-Northern Valley-Petroleum-Prairie-Richland-Sheridan-Western Roosevelt- Wibaux. Heat Advisory from noon to 9 PM MDT Wednesday for Central and Southeast Phillips-Central and Southern Valley-Daniels-Dawson- Eastern Roosevelt-Garfield-McCone-Northern Phillips-Northern Valley-Prairie-Richland-Sheridan-Western Roosevelt-Wibaux. Red Flag Warning until 9 PM MDT this evening for Dawson/McCone/Prairie/Richland/Wibaux Counties-Fort Peck Reservation and Daniels/Roosevelt/Sheridan Counties. Red Flag Warning from noon to 10 PM MDT Wednesday for Dawson/McCone/Prairie/Richland/Wibaux Counties-Fort Peck Reservation and Daniels/Roosevelt/Sheridan Counties. && weather.gov/glasgow
In the hours before
Special weather statement, May 26, 3:29 PM MDT, 2 hours 34 minutes before
Special Weather Statement
National Weather Service Glasgow MT
329 PM MDT Tue May 26 2026
MTZ017-018-020-023-061-262230-
Northern Valley MT-Daniels MT-Western Roosevelt MT-McCone MT-
Central and Southern Valley MT-
329 PM MDT Tue May 26 2026
...A strong thunderstorm will impact portions of western Daniels,
western Roosevelt, northeastern Valley and north central McCone
Counties through 430 PM MDT
...
At 329 PM MDT, Doppler radar was tracking a strong thunderstorm 14
miles northeast of Wolf Point, moving northwest at 30 mph.
HAZARD...Wind gusts of 50 to 55 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Wolf Point, Scobey, Bredette, Lustre, Peerless, Four Buttes, West
Fork, Volt, and Larslan.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4818 10502 4802 10565 4871 10637 4897 10554
TIME...MOT...LOC 2129Z 153DEG 27KT 4825 10544
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...55 MPH
GAHLocal storm report, May 26, 3:42 PM MDT, 2 hours 21 minutes before
Preliminary Local Storm Report
National Weather Service Glasgow MT
342 PM MDT Tue May 26 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0330 PM Tstm Wnd Gst 2 E Enid 47.70N 104.73W
05/26/2026 M63 MPH Richland MT Mesonet
Mesonet station MTLBT Lambert Mt-200 Mp
45.0.
&&
TFJSpecial weather statement, May 26, 4:40 PM MDT, 1 hour 23 minutes before
Special Weather Statement
National Weather Service Glasgow MT
440 PM MDT Tue May 26 2026
MTZ020-023>025-062-262345-
Richland MT-Dawson MT-Western Roosevelt MT-McCone MT-
Eastern Roosevelt MT-
440 PM MDT Tue May 26 2026
...A strong thunderstorm will impact portions of southeastern
Roosevelt, northeastern McCone, northwestern Dawson and northwestern
Richland Counties through 545 PM MDT
...
At 440 PM MDT, Doppler radar was tracking a strong thunderstorm 8
miles northeast of Richey, or 31 miles southeast of Poplar, moving
northwest at 10 mph.
HAZARD...Wind gusts of 50 to 55 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Poplar, Culbertson, Brockton, Richey, Lambert, Sprole, Fort Kipp, and
Enid.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4760 10448 4760 10524 4825 10535 4829 10441
TIME...MOT...LOC 2240Z 154DEG 9KT 4769 10491
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...55 MPH
RDJSpecial weather statement, May 26, 4:54 PM MDT, 1 hour 9 minutes before
Special Weather Statement
National Weather Service Glasgow MT
454 PM MDT Tue May 26 2026
MTZ017-018-020-061-270000-
Northern Valley MT-Daniels MT-Western Roosevelt MT-
Central and Southern Valley MT-
454 PM MDT Tue May 26 2026
...A strong thunderstorm will impact portions of western Daniels,
northwestern Roosevelt and northeastern Valley Counties through 600
PM MDT
...
At 453 PM MDT, Doppler radar was tracking a strong thunderstorm 7
miles southeast of Peerless, or 16 miles southwest of Scobey, moving
northwest at 20 mph.
HAZARD...Wind gusts of 50 to 55 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Richland, Peerless, West Fork, and Four Buttes.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4848 10540 4841 10577 4885 10624 4894 10550
TIME...MOT...LOC 2253Z 148DEG 18KT 4868 10574
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...55 MPH
RDJLocal storm report, May 26, 4:59 PM MDT, 1 hour 4 minutes before
Preliminary Local Storm Report
National Weather Service Glasgow MT
459 PM MDT Tue May 26 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0430 PM Tstm Wnd Dmg 12 SSE Sprole 47.95N 104.94W
05/26/2026 Richland MT Trained Spotter
Wind and lightning damaged trees.
&&
TFJSpecial weather statement, May 26, 5:31 PM MDT, 32 minutes before
Special Weather Statement
National Weather Service Glasgow MT
531 PM MDT Tue May 26 2026
MTZ016-017-022-023-059-061-270030-
Garfield MT-Central and Southeast Phillips MT-Northern Valley MT-
Northern Phillips MT-McCone MT-Central and Southern Valley MT-
531 PM MDT Tue May 26 2026
...Strong thunderstorms will impact portions of east central
Phillips, northeastern Garfield, southwestern Valley and northwestern
McCone Counties through 630 PM MDT
...
At 529 PM MDT, Doppler radar was tracking strong storm outflow along
a line extending from near Hinsdale to near Rock Creek Rec Area.
Movement was west at 15 mph.
HAZARD...Wind gusts of 50 to 55 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Sudden large waves on Fort Peck lake are
possible.
Locations impacted include...
Glasgow, Malta, Fort Peck, Saco, The Pines Rec Area, Tampico,
Hinsdale, Duck Creek Rec Area, Fort Peck Marina, Hell Creek Rec Area,
Nelson Creek Rec Area, Rock Creek Rec Area, Vandalia, Sleeping
Buffalo, Park Grove, The Bentonite Plant, Weldon, Haxby, Content, and
Bowdoin.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
If on or near Fort Peck Lake, get out of the water and move indoors
or inside a vehicle. Remember, lightning can strike out to 10 miles
from the parent thunderstorm. If you can hear thunder, you are close
enough to be struck by lightning. Move to safe shelter now! Do not
be caught on the water in a thunderstorm.
Persons in campgrounds should consider seeking sturdy shelter until
these storms pass.
&&
LAT...LON 4843 10808 4737 10702 4760 10571 4862 10707
TIME...MOT...LOC 2329Z 082DEG 13KT 4843 10710 4772 10614
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...55 MPH
GAHThe office that day
Everything else NWS Glasgow, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 26, 6:30 PM MDT | Special Weather Statement | GGW | McCone | 60 min |
| May 26, 6:55 PM MDT | Special Weather Statement | GGW | Daniels | 65 min |
| May 26, 7:54 PM MDT | Special Weather Statement | GGW | Daniels | 66 min |
| May 26, 10:07 PM MDT | Red Flag Warning | GGW | Daniels, Dawson, McCone, Prairie, Richland, Roosevelt and 3 more | 48 hr |
Nearby
Severe Thunderstorm Warnings in Montana, 2026Every severe thunderstorm warning in 2026
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.