Alert archive / North Dakota / Special Weather Statements in 2020

Special Weather Statement, NWS Bismarck, ND

August 8, 2020Slope County, North Dakota

NWS Bismarck, ND issued this special weather statement at Aug 8, 2020, 8:41 PM MDT for Slope County, North Dakota. It was in force for 34 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 8, 2020, 8:41 PM MDT (02:41 UTC)
Expired: Aug 8, 2020, 9:15 PM MDT
In force: 34 min
Issued by: NWS Bismarck, ND

County Slope County, ND

The radar

The Bismarck radar (KBIS), 187 km from the middle of the area, began a volume at 02:42 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 191 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2499 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 187 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 8, 8:00 PM MDT, 41 minutes earlier.

Area forecast discussion, Aug 8, 8:00 PM MDT, 41 minutes before

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Hazardous weather outlook, Aug 8, 5:21 PM MDT, 3 hours 20 minutes before

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In the hours before

Local storm report, Aug 8, 3:35 PM MDT, 5 hours 6 minutes before

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Local storm report, Aug 8, 4:00 PM MDT, 4 hours 41 minutes before

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Special weather statement, Aug 8, 7:57 PM MDT, 44 minutes before

Special Weather Statement
National Weather Service Bismarck ND
757 PM MDT Sat Aug 8 2020

NDZ043-090245-
Bowman ND-
757 PM MDT Sat Aug 8 2020

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN BOWMAN COUNTY UNTIL 845
PM MDT...

At 756 PM MDT, a strong thunderstorm was located 7 miles northeast of
Table Mountain, or 16 miles southwest of Bowman, moving northeast at
25 mph.

Half inch hail and wind gusts to 40 mph will be possible with this
storm.

Locations impacted include...
Bowman.

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 4595 10343 4595 10367 4597 10371 4625 10347
      4605 10318 4594 10339
TIME...MOT...LOC 0156Z 225DEG 21KT 4598 10357

HARGROVE

Special weather statement, Aug 8, 8:41 PM MDT, 0 minutes before

Special Weather Statement
National Weather Service Bismarck ND
841 PM MDT Sat Aug 8 2020

NDZ040-043-090315-
Slope ND-Bowman ND-
841 PM MDT Sat Aug 8 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN BOWMAN AND
SOUTHEASTERN SLOPE COUNTIES UNTIL 915 PM MDT...

At 841 PM MDT, a strong thunderstorm was located 7 miles northeast of
Bowman, moving northeast at 40 mph.

Half inch hail and wind gusts to 40 mph will be possible with this
storm.

Locations impacted include...
Buffalo Springs.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek shelter
inside a building or vehicle.

&&

LAT...LON 4628 10340 4651 10309 4633 10292 4629 10293
      4628 10293 4628 10299 4624 10300 4615 10328
TIME...MOT...LOC 0241Z 236DEG 33KT 4625 10328

HARGROVE

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 8, 7:57 PM MDT	Special Weather Statement	BIS	Bowman	48 min
Aug 8, 8:04 PM MDT	Severe Thunderstorm Warning	BIS	Bowman	41 min
Aug 8, 11:33 PM MDT	Special Weather Statement	BIS	McKenzie	27 min
Aug 8, 11:35 PM MDT	Special Weather Statement	BIS	McKenzie	25 min
Aug 9, 12:12 AM MDT	Special Weather Statement	BIS	McKenzie	33 min
Aug 9, 12:57 AM MDT	Special Weather Statement	BIS	Mountrail	33 min
Aug 9, 1:18 AM MDT	Special Weather Statement	BIS	Mountrail	42 min
Aug 9, 1:33 AM MDT	Severe Thunderstorm Warning	BIS	Dunn, McLean, Mountrail	34 min
Aug 9, 2:00 AM MDT	Special Weather Statement	BIS	Mountrail	30 min
Aug 9, 2:19 AM MDT	Special Weather Statement	BIS	Burke	41 min
Aug 9, 4:13 AM MDT	Special Weather Statement	BIS	McHenry, Pierce	47 min
Aug 9, 4:47 AM MDT	Severe Thunderstorm Warning	BIS	McHenry, Pierce	43 min
Aug 9, 5:18 AM MDT	Special Weather Statement	BIS	Rolette	42 min
Aug 9, 7:45 AM MDT	Special Weather Statement	BIS	Rolette	30 min
Aug 9, 1:08 PM MDT	Tornado Warning	BIS	LaMoure	37 min
Aug 9, 2:23 PM MDT	Special Weather Statement	BIS	LaMoure	37 min
Aug 9, 2:30 PM MDT	Severe Thunderstorm Warning	BIS	LaMoure	30 min
Aug 9, 2:50 PM MDT	Severe Thunderstorm Warning	BIS	Dickey	20 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.