Alert archive / North Dakota / Special Weather Statements in 2020

Special Weather Statement, NWS Bismarck, ND

August 4, 2020Sheridan County, North Dakota

NWS Bismarck, ND issued this special weather statement at Aug 4, 2020, 10:22 PM CDT for Sheridan County, North Dakota. It was in force for 23 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 4, 2020, 10:22 PM CDT (03:22 UTC)
Expired: Aug 4, 2020, 10:45 PM CDT
In force: 23 min
Issued by: NWS Bismarck, ND

County Sheridan County, ND

The radar

The Minot AFB radar (KMBX), 64 km from the middle of the area, began a volume at 03:22 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, 3.4 hours before the alert went out and 117 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: 80 J/kg
Mixed-layer CIN: -82 J/kg
Mixed-layer LCL: 1503 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 84 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 4, 8:50 PM CDT, 1 hour 32 minutes earlier.

Area forecast discussion, Aug 4, 8:50 PM CDT, 1 hour 32 minutes before

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Hazardous weather outlook, Aug 4, 8:51 PM CDT, 1 hour 31 minutes before

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In the hours before

Special weather statement, Aug 4, 9:11 PM CDT, 1 hour 11 minutes before

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Local storm report, Aug 4, 9:21 PM CDT, 1 hour 1 minute before

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Local storm report, Aug 4, 9:24 PM CDT, 58 minutes before

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Special weather statement, Aug 4, 9:30 PM CDT, 52 minutes before

Special Weather Statement
National Weather Service Bismarck ND
930 PM CDT Tue Aug 4 2020

NDZ021-050315-
McLean ND-
930 PM CDT Tue Aug 4 2020

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN MCLEAN COUNTY UNTIL
1015 PM CDT...

At 930 PM CDT, a strong thunderstorm was located near Underwood, or 9
miles north of Washburn, moving southeast at 10 mph.

Nickel size hail will be possible with this storm.

Locations impacted include...
Falkirk.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 4724 10098 4725 10098 4727 10100 4729 10107
      4738 10121 4752 10104 4744 10067 4742 10067
      4718 10088
TIME...MOT...LOC 0230Z 304DEG 11KT 4742 10108

CJS

Special weather statement, Aug 4, 9:51 PM CDT, 31 minutes before

Special Weather Statement
National Weather Service Bismarck ND
951 PM CDT Tue Aug 4 2020

NDZ012-021-022-050315-
McHenry ND-McLean ND-Sheridan ND-
951 PM CDT Tue Aug 4 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN SHERIDAN...
NORTHEASTERN MCLEAN AND SOUTHEASTERN MCHENRY COUNTIES UNTIL 1015 PM
CDT...

At 950 PM CDT, a strong thunderstorm was located near Butte, or 30
miles northwest of Mcclusky, moving east at 15 mph.

Penny size hail will be possible with this storm.

Locations impacted include...
Drake, Butte, Balfour, Kief and Krueger Lake.

LAT...LON 4782 10090 4798 10084 4800 10034 4770 10042
TIME...MOT...LOC 0250Z 288DEG 13KT 4789 10074

CJS

Special weather statement, Aug 4, 10:22 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service Bismarck ND
1022 PM CDT Tue Aug 4 2020

NDZ012-021-022-050345-
McHenry ND-McLean ND-Sheridan ND-
1022 PM CDT Tue Aug 4 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN SHERIDAN...
NORTHEASTERN MCLEAN AND SOUTH CENTRAL MCHENRY COUNTIES UNTIL 1045 PM
CDT...

At 1022 PM CDT, a strong thunderstorm was located 5 miles west of
Butte, or 29 miles northwest of Mcclusky, moving southeast at 20 mph.

Penny size hail will be possible with this storm.

Locations impacted include...
Butte, Kief, Krueger Lake and Strawberry Lake.

LAT...LON 4785 10092 4793 10081 4791 10046 4769 10044
      4769 10089
TIME...MOT...LOC 0322Z 315DEG 17KT 4784 10078

EDWARDS

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 4, 7:21 PM CDT	Special Weather Statement	BIS	McHenry	39 min
Aug 4, 7:39 PM CDT	Tornado Warning Tornado observed	BIS	Mountrail, Williams	36 min
Aug 4, 7:44 PM CDT	Special Weather Statement	BIS	McLean	31 min
Aug 4, 8:02 PM CDT	Special Weather Statement	BIS	Dunn	28 min
Aug 4, 8:23 PM CDT	Special Weather Statement	BIS	Mountrail	37 min
Aug 4, 8:38 PM CDT	Special Weather Statement	BIS	McHenry	37 min
Aug 4, 8:53 PM CDT	Special Weather Statement	BIS	Dunn	37 min
Aug 4, 9:06 PM CDT	Special Weather Statement	BIS	McLean	24 min
Aug 4, 9:11 PM CDT	Special Weather Statement	BIS	McHenry	34 min
Aug 4, 9:30 PM CDT	Special Weather Statement	BIS	Oliver	45 min
Aug 4, 9:51 PM CDT	Special Weather Statement	BIS	Sheridan	24 min
Aug 4, 11:27 PM CDT	Special Weather Statement	BIS	Sheridan	48 min
Aug 5, 12:10 AM CDT	Special Weather Statement	BIS	Sheridan	35 min
Aug 5, 12:49 AM CDT	Special Weather Statement	BIS	Sheridan	26 min

Nearby

Special Weather Statements in North Dakota, 2020 Every special weather statement in 2020

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.