Alert archive / North Dakota / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 37, NWS Bismarck, ND

June 21, 2023Emmons County, Sioux County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jun 21, 2023, 10:17 PM CDT for Emmons County, Sioux County, North Dakota. It was in force for 31 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 21, 2023, 10:17 PM CDT (03:17 UTC)
Expired: Jun 21, 2023, 10:48 PM CDT
In force: 31 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Emmons County, ND, Sioux County, ND

The radar

The Bismarck radar (KBIS), 64 km from the middle of the area, began a volume at 03:17 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 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 21, 9:37 PM CDT, 40 minutes earlier.

Area forecast discussion, Jun 21, 9:37 PM CDT, 40 minutes before

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Hazardous weather outlook, Jun 21, 9:41 PM CDT, 36 minutes before

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In the hours before

Local storm report, Jun 21, 4:30 PM CDT, 5 hours 47 minutes before

Preliminary Local Storm Report
National Weather Service Bismarck ND
430 PM CDT Wed Jun 21 2023

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

0715 PM     Tstm Wnd Dmg     4 NW Mandan             46.87N 100.94W
06/20/2023                   Morton             ND   Trained Spotter

            Tree approximately 10 inches in diameter
            split. Time estimated via radar.

&&

AE

Local storm report, Jun 21, 4:40 PM CDT, 5 hours 37 minutes before

Preliminary Local Storm Report
National Weather Service Bismarck ND
440 PM CDT Wed Jun 21 2023

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

0925 PM     Tstm Wnd Dmg     3 SW Belcourt           48.81N 99.80W
06/20/2023                   Rolette            ND   Fire Dept/Rescue

            Time estimated based on radar are other
            observations from the area. Part of a porch
            was torn from a home. Several Tepees were
            blown away. Wind estimated at 60 mph. Based
            on this wind being out ahead of the
            thunderstorm and likely on the gust front of
            the storm complex, and more importantly a
            video of the event, this was most likely a
            gustnado, a small whirlwind that forms as an
            eddy in a thunderstorms outflow. Gustnadoes
            do not connect to the storm base and so are
            not considered tornadoes. The video clearly
            shows what looks similar to a dust devil
            with cloud base connection lacking. The NWS
            records gustnadoes as Thunderstorm Wind
            events and not tornadoes.

&&

JPM

Local storm report, Jun 21, 4:54 PM CDT, 5 hours 23 minutes before

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Special weather statement, Jun 21, 8:18 PM CDT, 1 hour 59 minutes before

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Local storm report, Jun 21, 9:26 PM CDT, 51 minutes before

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Local storm report, Jun 21, 9:48 PM CDT, 29 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
Jun 21, 8:18 PM CDT	Special Weather Statement	BIS	Grant	27 min
Jun 21, 8:34 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Sioux	56 min
Jun 21, 9:24 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Sioux	66 min
Jun 22, 12:04 AM CDT	Special Weather Statement	BIS	Stark	41 min
Jun 22, 12:32 AM CDT	Severe Thunderstorm Warning	BIS	Dunn, Stark	58 min
Jun 22, 1:26 AM CDT	Special Weather Statement	BIS	Mercer	49 min
Jun 22, 2:02 AM CDT	Special Weather Statement	BIS	Hettinger	28 min
Jun 22, 3:12 AM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Morton	33 min
Jun 22, 3:35 AM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Burleigh, Morton, Oliver	35 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; radar from the NEXRAD Level II archive.