Alert archive / North Dakota / Special Weather Statements in 2021

Special Weather Statement, NWS Bismarck, ND

May 21, 2021Grant County, North Dakota

NWS Bismarck, ND issued this special weather statement at May 21, 2021, 11:23 PM MDT for Grant County, North Dakota. It was in force for 37 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: May 21, 2021, 11:23 PM MDT (05:23 UTC)
Expired: May 22, 2021, 12:00 AM MDT
In force: 37 min
Issued by: NWS Bismarck, ND

County Grant County, ND

The radar

The Bismarck radar (KBIS), 99 km from the middle of the area, began a volume at 05:26 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, 5.4 hours before the alert went out and 103 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: 608 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 129 m²/s²
0-3 km storm-relative helicity: 296 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

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 May 21, 8:38 PM MDT, 2 hours 45 minutes earlier.

Area forecast discussion, May 21, 8:38 PM MDT, 2 hours 45 minutes before

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Hazardous weather outlook, May 21, 8:41 PM MDT, 2 hours 42 minutes before

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In the hours before

Local storm report, May 21, 6:40 PM MDT, 4 hours 43 minutes before

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Local storm report, May 21, 9:38 PM MDT, 1 hour 45 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
1038 PM CDT FRI MAY 21 2021

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

1030 PM     HEAVY RAIN       6 SW ORRIN              48.02N 100.24W
05/21/2021  M1.21 INCH       MCHENRY            ND   CO-OP OBSERVER

            TOTAL PRECIPITATION FOR 24 HOURS ENDING AT
            10PM.

&&

RK

Special weather statement, May 21, 11:23 PM MDT, 0 minutes before

Special Weather Statement
National Weather Service Bismarck ND
1223 AM CDT Sat May 22 2021

NDZ034-041-042-220600-
Grant ND-Hettinger ND-Morton ND-
1223 AM CDT Sat May 22 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN HETTINGER...WEST
CENTRAL MORTON AND NORTHWESTERN GRANT COUNTIES UNTIL 100 AM
CDT/MIDNIGHT MDT/...

At 1222 AM CDT/1122 PM MDT/, a strong thunderstorm was located 11
miles west of Heart Butte Dam, or 15 miles northwest of Elgin, moving
north at 25 mph.

Penny size hail and wind gusts to 40 mph will be possible with this
storm.

Locations impacted include...
Glen Ullin.

Very heavy rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

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 4654 10214 4663 10213 4663 10210 4682 10210
      4688 10209 4679 10167 4650 10201
TIME...MOT...LOC 0522Z 196DEG 23KT 4658 10206

ANGLIN

The office that day

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

Issued	Product	Office	Counties	Lasted
May 21, 11:57 PM MDT	Special Weather Statement	BIS	Morton	18 min
May 22, 12:22 AM MDT	Special Weather Statement	BIS	Emmons	23 min
May 22, 12:43 AM MDT	Special Weather Statement	BIS	Emmons	32 min
May 22, 1:43 AM MDT	Special Weather Statement	BIS	Logan	32 min
May 22, 1:57 AM MDT	Special Weather Statement	BIS	Emmons	18 min
May 22, 2:12 AM MDT	Special Weather Statement	BIS	Logan	33 min
May 22, 2:16 AM MDT	Special Weather Statement	BIS	Logan	29 min
May 22, 3:01 AM MDT	Special Weather Statement	BIS	Stutsman	29 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.