Alert archive / North Dakota / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 102, NWS Bismarck, ND

August 1, 2023Grant County, Morton County, Sioux County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Aug 1, 2023, 9:24 PM MDT for Grant County, Morton County, Sioux County, North Dakota. It was in force for 56 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: Aug 1, 2023, 9:24 PM MDT (03:24 UTC)
Expired: Aug 1, 2023, 10:20 PM MDT
In force: 56 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Grant County, ND, Morton County, ND, Sioux County, ND

The radar

The Bismarck radar (KBIS), 60 km from the middle of the area, began a volume at 03:25 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
Aug 1, 2:52 PM MDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 3.4 hours before the alert went out and 63 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: 2418 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 1445 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: -21 m²/s²
0-3 km storm-relative helicity: 36 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 Bismarck, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 1, 9:18 PM MDT, 6 minutes earlier.

Area forecast discussion, Aug 1, 9:18 PM MDT, 6 minutes before

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Hazardous weather outlook, Aug 1, 9:03 PM MDT, 21 minutes before

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In the hours before

Local storm report, Aug 1, 8:07 PM MDT, 1 hour 17 minutes before

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Local storm report, Aug 1, 8:08 PM MDT, 1 hour 16 minutes before

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Local storm report, Aug 1, 8:10 PM MDT, 1 hour 14 minutes before

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Local storm report, Aug 1, 8:15 PM MDT, 1 hour 9 minutes before

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Local storm report, Aug 1, 8:40 PM MDT, 44 minutes before

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Local storm report, Aug 1, 8:45 PM MDT, 39 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
Aug 1, 6:09 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Dunn, McKenzie	66 min
Aug 1, 6:16 PM MDT	Severe Thunderstorm Warning	BIS	Billings, Golden Valley, McKenzie	59 min
Aug 1, 6:16 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BIS	McLean, Mercer	59 min
Aug 1, 6:24 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Stutsman	66 min
Aug 1, 7:01 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Billings, Dunn, McKenzie, Stark	74 min
Aug 1, 7:04 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Burleigh, McLean, Mercer, Morton, Oliver	56 min
Aug 1, 7:16 PM MDT	Areal Flood Advisory	BIS	Dunn, Mercer	6 hr
Aug 1, 7:34 PM MDT	Areal Flood Advisory	BIS	Foster, Kidder, Stutsman, Wells	6 hr
Aug 1, 7:49 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Stark	26 min
Aug 1, 7:55 PM MDT	Severe Thunderstorm Warning	BIS	Burleigh, McLean, Morton, Oliver	65 min
Aug 1, 8:01 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Mercer, Morton, Oliver	59 min
Aug 1, 8:06 PM MDT	Tornado Warning	BIS	Burleigh	24 min
Aug 1, 8:12 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Grant, Hettinger, Morton, Stark	78 min
Aug 1, 8:54 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Burleigh, Kidder	66 min
Aug 1, 8:59 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Morton, Oliver	52 min
Aug 1, 9:02 PM MDT	Severe Thunderstorm Warning	BIS	Burleigh, Emmons, Morton	58 min
Aug 1, 10:04 PM MDT	Special Weather Statement	BIS	Logan	41 min
Aug 1, 10:43 PM MDT	Special Weather Statement	BIS	Logan	47 min
Aug 1, 11:28 PM MDT	Special Weather Statement	BIS	McIntosh	32 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 2023 Every severe thunderstorm warning in 2023

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.