Alert archive / North Dakota / Tornado Warnings in 2026

Tornado Warning 21, NWS Bismarck, ND

September 7, 2026Sheridan County, North Dakota

NWS Bismarck, ND issued this tornado warning at Sep 7, 2026, 7:17 PM CDT for Sheridan County, North Dakota. It was in force for 28 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: Sep 7, 2026, 7:17 PM CDT (00:17 UTC)
Expired: Sep 7, 2026, 7:45 PM CDT
In force: 28 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.25 in

County Sheridan County, ND

The radar

The Minot AFB radar (KMBX), 86 km from the middle of the area, began a volume at 00:20 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.

What was reported inside it

Time	Report	Where	Remark
Sep 7, 7:29 PM CDT	TSTM WND GST 59	3 Ese Krueger Lake, ND	10 meter measured wind gust at NDAWN station 3 north Skogmo.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

Issued	Product	Office	Lasted
Sep 7, 5:42 PM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 0.3 hours before the alert went out and 107 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: 2930 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 1192 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 267 m²/s²
0-3 km storm-relative helicity: 303 m²/s²
Significant tornado parameter: 4.6
Supercell composite: 16.2

Open this sounding in Storm Lab

The text

As transmitted.

668 
WFUS53 KBIS 080017
TORBIS
NDC083-080045-
/O.NEW.KBIS.TO.W.0021.260908T0017Z-260908T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Bismarck ND
717 PM CDT Mon Sep 7 2026

The National Weather Service in Bismarck has issued a

* Tornado Warning for...
  Northern Sheridan County in south central North Dakota...

* Until 745 PM CDT.

* At 717 PM CDT, a severe thunderstorm capable of producing a tornado
  was located 16 miles north of Mcclusky, or 26 miles west of Harvey,
  moving east at 30 mph.

  HAZARD...Tornado and half dollar size hail.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without
           shelter. Mobile homes will be damaged or destroyed. Damage
           to roofs, windows and vehicles will occur. Tree damage is
           likely.

* Locations impacted include...
  Martin, Sheyenne Lake and Krueger Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to an interior room on the lowest floor of a well-built building
away from windows. If you are outdoors, in a mobile home, or in a
vehicle, move to the closest substantial shelter and protect yourself
from flying debris.

&&

LAT...LON 4762 10060 4767 10060 4767 10059 4778 10059
      4785 10023 4785 10007 4767 10007 4767 10006
      4758 10006
TIME...MOT...LOC 0017Z 263DEG 26KT 4771 10047

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.25 IN

$$

Johnson

1 follow-up statement

137 
WWUS53 KBIS 080037
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
737 PM CDT Mon Sep 7 2026

NDC083-080045-
/O.CON.KBIS.TO.W.0021.000000T0000Z-260908T0045Z/
Sheridan ND-
737 PM CDT Mon Sep 7 2026

...TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR
NORTHEASTERN SHERIDAN COUNTY...

At 737 PM CDT, a severe thunderstorm capable of producing a tornado
was located 12 miles southwest of Anamoose, or 20 miles west of
Harvey, moving east at 20 mph.

HAZARD...Tornado and quarter size hail.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without
         shelter. Mobile homes will be damaged or destroyed. Damage
         to roofs, windows and vehicles will occur. Tree damage is
         likely.

Locations impacted include...
  Martin and Sheyenne Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to an interior room on the lowest floor of a well-built building
away from windows. If you are outdoors, in a mobile home, or in a
vehicle, move to the closest substantial shelter and protect yourself
from flying debris.

&&

LAT...LON 4764 10046 4780 10049 4785 10024 4785 10007
      4767 10007 4767 10006 4762 10006
TIME...MOT...LOC 0017Z 259DEG 19KT 4771 10051

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN

$$

Johnson

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 7, 7:04 PM CDT	Severe Thunderstorm Warning	BIS	McHenry, McLean, Pierce, Sheridan, Wells	56 min
Sep 8, 1:19 PM CDT	Fire Weather Watch	BIS	Adams, Billings, Bowman, Dunn, Golden Valley, Hettinger and 3 more	24 hr

Nearby

Tornado Warnings in North Dakota, 2026 Every tornado warning in 2026 Tornadoes 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.