Alert archive / North Dakota / Special Weather Statements in 2021

Special Weather Statement, NWS Bismarck, ND

July 17, 2021Bowman County, North Dakota

NWS Bismarck, ND issued this special weather statement at Jul 17, 2021, 8:21 PM MDT for Bowman County, North Dakota. It was in force for 39 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: Jul 17, 2021, 8:21 PM MDT (02:21 UTC)
Expired: Jul 17, 2021, 9:00 PM MDT
In force: 39 min
Issued by: NWS Bismarck, ND

County Bowman County, ND

The radar

The Rapid City radar (KUDX), 238 km from the middle of the area, began a volume at 02:22 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

Rapid City, SD (KUNR), launched 00:00Z, 2.4 hours before the alert went out and 243 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: 72 J/kg
Mixed-layer CIN: -311 J/kg
Mixed-layer LCL: 2938 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: -113 m²/s²
0-3 km storm-relative helicity: -59 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 Jul 17, 8:14 PM MDT, 7 minutes earlier.

Area forecast discussion, Jul 17, 8:14 PM MDT, 7 minutes before

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Hazardous weather outlook, Jul 17, 8:17 PM MDT, 4 minutes before

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In the hours before

Local storm report, Jul 17, 6:57 PM MDT, 1 hour 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
757 PM CDT SAT JUL 17 2021

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

0752 PM     HAIL             8 E SHERWOOD            48.97N 101.46W
07/17/2021  E1.00 INCH       BOTTINEAU          ND   PUBLIC

            ONGOING AT TIME OF REPORT. HEAVY RAIN AS
            WELL.

&&

AE

Special weather statement, Jul 17, 7:15 PM MDT, 1 hour 6 minutes before

Special Weather Statement
National Weather Service Bismarck ND
715 PM MDT Sat Jul 17 2021

NDZ043-180145-
Bowman ND-
715 PM MDT Sat Jul 17 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN BOWMAN COUNTY UNTIL
745 PM MDT...

At 714 PM MDT, a strong thunderstorm was located 14 miles west of Mud
Buttes, or 25 miles east of Ekalaka, moving southeast at 25 mph.

Nickel size hail and wind gusts to 55 mph will be possible with this
storm.

This storm will remain over mainly rural areas of southwestern Bowman
County.

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 4611 10405 4615 10404 4595 10382 4594 10394
      4595 10405
TIME...MOT...LOC 0114Z 328DEG 20KT 4603 10406

SCHILD

Local storm report, Jul 17, 7:38 PM MDT, 43 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
838 PM CDT SAT JUL 17 2021

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

0816 PM     HAIL             6 S ANTLER              48.88N 101.28W
07/17/2021  E0.70 INCH       BOTTINEAU          ND   TRAINED SPOTTER

&&

AE

Special weather statement, Jul 17, 8:21 PM MDT, 0 minutes before

Special Weather Statement
National Weather Service Bismarck ND
821 PM MDT Sat Jul 17 2021

NDZ043-180300-
Bowman ND-
821 PM MDT Sat Jul 17 2021

...SIGNIFICANT WEATHER ADVISORY FOR FAR WESTERN BOWMAN COUNTY UNTIL
900 PM MDT...

At 821 PM MDT, a strong thunderstorm was located 12 miles southwest
of Marmarth, or 19 miles southeast of Baker, moving southeast at 25
mph.

Penny size hail and wind gusts to 50 mph will be possible with this
storm.

This storm will remain over mainly rural areas of far western Bowman
County.

LAT...LON 4627 10404 4595 10377 4595 10405
TIME...MOT...LOC 0221Z 334DEG 21KT 4614 10405

SCHILD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 6:32 PM MDT	Severe Thunderstorm Warning	BIS	Bottineau, Renville	28 min
Jul 17, 6:57 PM MDT	Severe Thunderstorm Warning	BIS	Bottineau	48 min
Jul 17, 7:15 PM MDT	Special Weather Statement	BIS	Bowman	30 min
Jul 18, 12:22 AM MDT	Special Weather Statement	BIS	Bottineau	38 min
Jul 18, 1:00 AM MDT	Special Weather Statement	BIS	Rolette	45 min
Jul 18, 1:45 AM MDT	Special Weather Statement	BIS	Rolette	45 min
Jul 18, 2:30 AM MDT	Special Weather Statement	BIS	Rolette	30 min
Jul 18, 4:03 AM MDT	Special Weather Statement	BIS	Rolette	27 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.