Alert archive / North Dakota / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 263, NWS Bismarck, ND

September 11, 2025McHenry County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Sep 11, 2025, 9:41 PM CDT for McHenry County, North Dakota. It was in force for 49 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: Sep 11, 2025, 9:41 PM CDT (02:41 UTC)
Expired: Sep 11, 2025, 10:30 PM CDT
In force: 49 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

County McHenry County, ND

The radar

The Minot AFB radar (KMBX), 24 km from the middle of the area, began a volume at 02:43 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

Bismarck Municip, ND (KBIS), launched 00:00Z, 2.7 hours before the alert went out and 163 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: 2247 J/kg
Mixed-layer CIN: -60 J/kg
Mixed-layer LCL: 1692 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 113 m²/s²
0-3 km storm-relative helicity: 199 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 10.3

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 Sep 11, 6:45 PM CDT, 2 hours 56 minutes earlier.

Area forecast discussion, Sep 11, 6:45 PM CDT, 2 hours 56 minutes before

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Hazardous weather outlook, Sep 11, 6:45 PM CDT, 2 hours 56 minutes before

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In the hours before

Special weather statement, Sep 11, 9:26 PM CDT, 15 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 11, 9:26 PM CDT	Special Weather Statement	BIS	McHenry	34 min
Sep 11, 10:18 PM CDT	Severe Thunderstorm Warning	BIS	McHenry	42 min
Sep 11, 10:20 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	McHenry, Pierce	55 min
Sep 11, 11:01 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau, McHenry, Pierce	59 min
Sep 11, 11:46 PM CDT	Severe Thunderstorm Warning	BIS	McHenry, Pierce	44 min
Sep 12, 12:00 AM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Bottineau, McHenry, Pierce, Rolette	45 min
Sep 12, 12:29 AM CDT	Severe Thunderstorm Warning	BIS	McHenry, Pierce	61 min
Sep 12, 12:33 AM CDT	Severe Thunderstorm Warning	BIS	Bottineau, Rolette	39 min
Sep 12, 12:41 AM CDT	Areal Flood Advisory	BIS	McHenry, Pierce	4 hr
Sep 12, 1:40 AM CDT	Flash Flood Warning	BIS	Pierce	3 hr
Sep 12, 5:12 AM CDT	Special Weather Statement	BIS	Dunn	33 min
Sep 12, 5:46 AM CDT	Special Weather Statement	BIS	Dunn	29 min
Sep 12, 7:18 AM CDT	Special Weather Statement	BIS	Pierce	42 min
Sep 12, 10:07 AM CDT	Special Weather Statement	BIS	Wells	38 min
Sep 12, 10:49 AM CDT	Special Weather Statement	BIS	Wells	26 min
Sep 12, 11:11 AM CDT	Special Weather Statement	BIS	Wells	34 min
Sep 12, 12:43 PM CDT	Special Weather Statement	BIS	Williams	32 min
Sep 12, 12:59 PM CDT	Tornado Warning Tornado observed	BIS	Williams	31 min
Sep 12, 1:41 PM CDT	Special Weather Statement	BIS	Burke	34 min
Sep 12, 2:12 PM CDT	Special Weather Statement	BIS	Burke	33 min
Sep 12, 4:10 PM CDT	Special Weather Statement	BIS	Bowman	35 min
Sep 12, 4:40 PM CDT	Severe Thunderstorm Warning	BIS	Bowman	39 min
Sep 12, 5:52 PM CDT	Severe Thunderstorm Warning	BIS	Morton, Sioux	38 min
Sep 12, 6:15 PM CDT	Severe Thunderstorm Warning	BIS	Grant	45 min
Sep 12, 6:24 PM CDT	Severe Thunderstorm Warning	BIS	Morton, Sioux	51 min
Sep 12, 6:39 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Emmons, Sioux	51 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 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.