Alert archive / North Dakota / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 16, NWS Bismarck, ND

June 6, 2026Divide County, Williams County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jun 6, 2026, 11:29 PM CDT for Divide County, Williams County, North Dakota. It was in force for 46 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 6, 2026, 11:29 PM CDT (04:29 UTC)
Expired
Jun 7, 2026, 12:15 AM CDT
In force
46 min
Issued by
NWS Bismarck, ND
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Divide County, ND, Williams County, ND

The radar

The Minot AFB radar (KMBX), 194 km from the middle of the area, began a volume at 04:30 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.

IssuedProductOfficeLasted
Jun 6, 7:37 PM CDTSevere Thunderstorm WatchSPC9 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 4.5 hours before the alert went out and 290 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, Bismarck Municip, ND at 00:00Z on 2026-06-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 690 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, Bismarck Municip, ND at 00:00Z on 2026-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 58 square meters per square second.193958Sfc1 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
690 J/kg
Mixed-layer CIN
-132 J/kg
Mixed-layer LCL
2573 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
58 m²/s²
0-3 km storm-relative helicity
232 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.2

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 Bismarck, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 6, 10:00 PM CDT, 1 hour 29 minutes earlier.

Area forecast discussion, Jun 6, 10:00 PM CDT, 1 hour 29 minutes before
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Hazardous weather outlook, Jun 6, 9:42 PM CDT, 1 hour 47 minutes before
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In the hours before

Local storm report, Jun 6, 9:13 PM CDT, 2 hours 16 minutes before
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Special weather statement, Jun 6, 9:36 PM CDT, 1 hour 53 minutes before
Special Weather Statement
National Weather Service Bismarck ND
936 PM CDT Sat Jun 6 2026

NDZ001-009-017-070345-
Divide-Williams-McKenzie-
Including the cities of Crosby, Williston, and Watford City
936 PM CDT Sat Jun 6 2026 /836 PM MDT Sat Jun 6 2026/

...STRONG TO SEVERE THUNDERSTORMS ARE EXPECTED TO MOVE INTO
NORTHWEST NORTH DAKOTA LATE THIS EVENING...

Thunderstorms have rapidly developed in northeast Montana, and
are moving northeast at 50 mph. They are expected to cross the
North Dakota and Montana state line around 1030 PM CDT. The storms
are expected to then continue across northwest North Dakota, and
some of them will be severe. The main threat will be damaging
winds up to around 70 mph, but large hail up to ping pong ball
size is also possible. A Severe Thunderstorm Watch is in effect
for the area until 3 AM CDT.

Prepare now for the possibility of severe thunderstorms in the
next few hours if you are in northwest North Dakota.

CJS
Special weather statement, Jun 6, 10:03 PM CDT, 1 hour 26 minutes before
Special Weather Statement
National Weather Service Bismarck ND
1003 PM CDT Sat Jun 6 2026

NDZ031-040-043-070345-
Slope ND-Bowman ND-Golden Valley ND-
903 PM MDT Sat Jun 6 2026

...A STRONG THUNDERSTORM WILL IMPACT WESTERN BOWMAN...SOUTHWESTERN
GOLDEN VALLEY AND SOUTHWESTERN SLOPE COUNTIES UNTIL 945 PM MDT...

At 903 PM MDT, Doppler radar was tracking a strong thunderstorm 14
miles south of Marmarth, or 31 miles west of Bowman, moving northeast
at 35 mph.

HAZARD...Wind gusts of 50 to 55 mph and nickel 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...
  Rhame, Marmarth, Mud Buttes, Griffin, Sunset Butte and Pretty
  Butte.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

&&

LAT...LON 4628 10405 4661 10405 4650 10362 4629 10337
      4595 10384 4595 10405
TIME...MOT...LOC 0303Z 217DEG 28KT 4610 10403

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...50 TO 55 MPH

Johnson
Local storm report, Jun 6, 10:14 PM CDT, 1 hour 15 minutes before
Preliminary Local Storm Report
National Weather Service Bismarck ND
1014 PM CDT Sat Jun 6 2026

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

0835 PM     Hail             Ambrose                 48.96N 103.48W
06/06/2026  M1.50 Inch       Divide             ND   Public

&&
Special weather statement, Jun 6, 10:45 PM CDT, 44 minutes before
Special Weather Statement
National Weather Service Bismarck ND
1045 PM CDT Sat Jun 6 2026

NDZ040-043-070430-
Bowman ND-Slope ND-
945 PM MDT Sat Jun 6 2026

...A STRONG THUNDERSTORM WILL IMPACT NORTHWESTERN BOWMAN AND
SOUTHWESTERN SLOPE COUNTIES UNTIL 1030 PM MDT...

At 945 PM MDT, Doppler radar was tracking a strong thunderstorm 9
miles southwest of Marmarth, or 31 miles west of Bowman, moving
northeast at 25 mph.

HAZARD...Wind gusts up to 50 mph and nickel 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...
  Rhame, Marmarth, Griffin, Sunset Butte and Pretty Butte.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4628 10405 4653 10405 4654 10404 4650 10362
      4629 10336 4600 10403 4602 10405
TIME...MOT...LOC 0345Z 226DEG 19KT 4619 10404

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...50 MPH

CJS

The office that day

Everything else NWS Bismarck, ND issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 6, 8:15 PM CDTSevere Thunderstorm Warning Considerable damage threatBISDivide46 min
Jun 6, 10:03 PM CDTSpecial Weather StatementBISBowman42 min
Jun 6, 10:35 PM CDTSevere Thunderstorm Warning Considerable damage threatBISDivide, Williams55 min
Jun 6, 10:45 PM CDTSpecial Weather StatementBISBowman45 min
Jun 7, 12:02 AM CDTSevere Thunderstorm WarningBISDivide, Williams58 min
Jun 7, 12:35 AM CDTSpecial Weather StatementBISBillings, Stark40 min
Jun 7, 1:17 AM CDTWind AdvisoryBISBottineau, Burleigh, Dickey, Emmons, Foster, Grant and 14 more19 hr
Jun 7, 1:57 AM CDTSpecial Weather StatementBISMcKenzie33 min
Jun 7, 2:05 AM CDTSevere Thunderstorm WarningBISMcKenzie, Williams55 min
Jun 7, 2:58 AM CDTSevere Thunderstorm WarningBISMcKenzie, Mountrail62 min
Jun 7, 3:03 AM CDTSpecial Weather StatementBISWilliams27 min
Jun 7, 4:00 AM CDTSpecial Weather StatementBISWard30 min
Jun 7, 4:05 AM CDTSpecial Weather StatementBISWilliams25 min
Jun 7, 4:11 AM CDTSpecial Weather StatementBISBottineau34 min
Jun 7, 4:26 AM CDTSpecial Weather StatementBISRenville34 min
Jun 7, 5:14 AM CDTSpecial Weather StatementBISBottineau16 min
Jun 7, 5:46 PM CDTSevere Thunderstorm Warning Considerable damage threatBISGolden Valley74 min
Jun 7, 5:50 PM CDTSevere Thunderstorm Warning Considerable damage threatBISDunn, McKenzie55 min
Jun 7, 6:23 PM CDTSevere Thunderstorm Warning Considerable damage threatBISBillings, Golden Valley67 min
Jun 7, 6:28 PM CDTSevere Thunderstorm Warning Considerable damage threatBISBowman47 min
Jun 7, 6:35 PM CDTSevere Thunderstorm Warning Considerable damage threatBISDunn, McKenzie, Williams55 min
Jun 7, 6:35 PM CDTSevere Thunderstorm WarningBISGolden Valley55 min
Jun 7, 6:37 PM CDTSevere Thunderstorm WarningBISBillings, Dunn, McKenzie53 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.