Alert archive / North Dakota / Special Weather Statements in 2021

Special Weather Statement, NWS Bismarck, ND

June 7, 2021Slope County, North Dakota

NWS Bismarck, ND issued this special weather statement at Jun 7, 2021, 1:48 AM MDT for Slope County, North Dakota. It was in force for 27 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: Jun 7, 2021, 1:48 AM MDT (07:48 UTC)
Expired: Jun 7, 2021, 2:15 AM MDT
In force: 27 min
Issued by: NWS Bismarck, ND

County Slope County, ND

The radar

The Bismarck radar (KBIS), 193 km from the middle of the area, began a volume at 07:50 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, 7.8 hours before the alert went out and 198 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: 2990 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: -29 m²/s²
0-3 km storm-relative helicity: -37 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 Jun 6, 11:40 PM MDT, 2 hours 8 minutes earlier.

Area forecast discussion, Jun 6, 11:40 PM MDT, 2 hours 8 minutes before

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Hazardous weather outlook, Jun 6, 11:41 PM MDT, 2 hours 7 minutes before

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In the hours before

Special weather statement, Jun 7, 1:16 AM MDT, 32 minutes before

Special Weather Statement
National Weather Service Bismarck ND
116 AM MDT Mon Jun 7 2021

NDZ031>033-040-043-070745-
Golden Valley ND-Stark ND-Billings ND-Slope ND-Bowman ND-
116 AM MDT Mon Jun 7 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN GOLDEN VALLEY...
NORTHWESTERN BOWMAN...SOUTHWESTERN BILLINGS...SLOPE AND SOUTHWESTERN
STARK COUNTIES UNTIL 145 AM MDT...

At 115 AM MDT, a pair of strong thunderstorms were located 8 miles
west of Amidon and near Marmarth, moving northeast at 50 mph.

Half inch hail will be possible with these storms.

Locations impacted include...
Amidon, Marmarth, Three V Crossing and Pretty Butte.

These storms 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 4642 10404 4687 10339 4655 10293 4649 10293
      4614 10404
TIME...MOT...LOC 0715Z 237DEG 42KT 4647 10351

SCHILD

Special weather statement, Jun 7, 1:48 AM MDT, 0 minutes before

Special Weather Statement
National Weather Service Bismarck ND
148 AM MDT Mon Jun 7 2021

NDZ032-033-040-070815-
Stark ND-Billings ND-Slope ND-
148 AM MDT Mon Jun 7 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL BILLINGS...
NORTHEASTERN SLOPE AND SOUTHWESTERN STARK COUNTIES UNTIL 215 AM
MDT...

At 147 AM MDT, a strong thunderstorm was located 9 miles northwest of
Amidon, moving northeast at 35 mph.

Penny size hail will be possible with this storm.

Locations impacted include...
Schefield.

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 4683 10321 4667 10280 4641 10354 4656 10368
TIME...MOT...LOC 0747Z 235DEG 31KT 4654 10349

SCHILD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 7, 1:16 AM MDT	Special Weather Statement	BIS	Slope	29 min
Jun 7, 4:06 AM MDT	Special Weather Statement	BIS	Mountrail	24 min
Jun 7, 5:06 PM MDT	Severe Thunderstorm Warning	BIS	McIntosh	54 min
Jun 7, 5:39 PM MDT	Severe Thunderstorm Warning	BIS	Stutsman	66 min
Jun 7, 5:58 PM MDT	Severe Thunderstorm Warning	BIS	LaMoure, Logan, McIntosh	62 min

Nearby

Special Weather Statements in North Dakota, 2021 Every special weather statement in 2021

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.