Alert archive / North Dakota / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 122, NWS Bismarck, ND

July 18, 2019Emmons County, Sioux County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jul 18, 2019, 2:02 AM CDT for Emmons County, Sioux County, North Dakota. It was in force for 58 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: Jul 18, 2019, 2:02 AM CDT (07:02 UTC)
Expired: Jul 18, 2019, 3:00 AM CDT
In force: 58 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Hail: 1.25 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 07:03 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, 7.0 hours before the alert went out and 64 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: 281 J/kg
Mixed-layer CIN: -56 J/kg
Mixed-layer LCL: 1963 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 61 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 Jul 17, 11:57 PM CDT, 2 hours 5 minutes earlier.

Area forecast discussion, Jul 17, 11:57 PM CDT, 2 hours 5 minutes before

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Hazardous weather outlook, Jul 17, 11:09 PM CDT, 2 hours 53 minutes before

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In the hours before

Local storm report, Jul 17, 9:44 PM CDT, 4 hours 18 minutes before

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Special weather statement, Jul 17, 10:47 PM CDT, 3 hours 15 minutes before

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Local storm report, Jul 17, 10:57 PM CDT, 3 hours 5 minutes before

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Local storm report, Jul 17, 11:32 PM CDT, 2 hours 30 minutes before

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Special weather statement, Jul 18, 12:07 AM CDT, 1 hour 55 minutes before

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Special weather statement, Jul 18, 1:29 AM CDT, 33 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
Jul 17, 7:03 PM CDT	Tornado Warning	BIS	Sioux	27 min
Jul 17, 7:04 PM CDT	Tornado Warning	BIS	Stark	26 min
Jul 17, 7:20 PM CDT	Special Weather Statement	BIS	Bottineau	40 min
Jul 17, 7:30 PM CDT	Severe Thunderstorm Warning	BIS	Emmons, Sioux	32 min
Jul 17, 7:33 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau	42 min
Jul 17, 7:34 PM CDT	Severe Thunderstorm Warning	BIS	Morton, Stark	56 min
Jul 17, 8:14 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau, Rolette	19 min
Jul 17, 8:35 PM CDT	Special Weather Statement	BIS	Morton	25 min
Jul 17, 8:36 PM CDT	Special Weather Statement	BIS	Golden Valley	24 min
Jul 17, 9:13 PM CDT	Special Weather Statement	BIS	Morton	32 min
Jul 17, 9:14 PM CDT	Special Weather Statement	BIS	Billings	31 min
Jul 17, 9:21 PM CDT	Severe Thunderstorm Warning	BIS	Morton	39 min
Jul 17, 10:47 PM CDT	Special Weather Statement	BIS	Kidder	28 min
Jul 18, 12:07 AM CDT	Special Weather Statement	BIS	Burleigh	23 min
Jul 18, 1:29 AM CDT	Special Weather Statement	BIS	Emmons, Kidder, Logan	46 min
Jul 18, 2:44 AM CDT	Special Weather Statement	BIS	LaMoure, Stutsman	46 min
Jul 18, 3:21 AM CDT	Special Weather Statement	BIS	Emmons	24 min
Jul 18, 3:30 AM CDT	Special Weather Statement	BIS	LaMoure	30 min
Jul 18, 3:40 AM CDT	Severe Thunderstorm Warning	BIS	Emmons, Logan	52 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 2019 Every severe thunderstorm warning in 2019

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.