Alert archive / Minnesota / Special Weather Statements in 2023

Special Weather Statement, NWS Grand Forks, ND

May 23, 2023Pennington County, Minnesota

NWS Grand Forks, ND issued this special weather statement at May 23, 2023, 2:21 PM CDT for Pennington County, Minnesota. It was in force for 24 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 23, 2023, 2:21 PM CDT (19:21 UTC)
Expired: May 23, 2023, 2:45 PM CDT
In force: 24 min
Issued by: NWS Grand Forks, ND
Hail: 0.75 in
Wind: 30

County Pennington County, MN

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 7.4 hours before the alert went out and 395 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: 260 J/kg
Mixed-layer CIN: -265 J/kg
Mixed-layer LCL: 1439 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: -24 m²/s²
0-3 km storm-relative helicity: 21 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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 Grand Forks, ND wrote its last area forecast discussion before this special weather statement went out at May 23, 12:34 PM CDT, 1 hour 47 minutes earlier.

Area forecast discussion, May 23, 12:34 PM CDT, 1 hour 47 minutes before

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Hazardous weather outlook, May 23, 6:36 AM CDT, 7 hours 45 minutes before

Hazardous Weather Outlook
National Weather Service Grand Forks ND
636 AM CDT Tue May 23 2023

MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024-
026>030-038-039-049-052>054-241145-
West Polk-Norman-Clay-Kittson-Roseau-Lake Of The Woods-
West Marshall-East Marshall-North Beltrami-Pennington-Red Lake-
East Polk-North Clearwater-South Beltrami-Mahnomen-
South Clearwater-Hubbard-West Becker-East Becker-Wilkin-
West Otter Tail-East Otter Tail-Wadena-Grant-Towner-Cavalier-
Pembina-Benson-Ramsey-Eastern Walsh-Eddy-Nelson-Grand Forks-
Griggs-Steele-Traill-Barnes-Cass-Ransom-Sargent-Richland-
Western Walsh-
636 AM CDT Tue May 23 2023

This hazardous weather outlook is for portions of eastern North
Dakota, west central and northwest Minnesota.

.DAY ONE...Today and Tonight

Showers and thunderstorms move through this morning in
southeastern North Dakota and Northwest Minnesota. Further
thunderstorms develop this afternoon and evening bringing brief
heavy rain and frequent lightning.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated.

In the hours before

Special weather statement, May 23, 1:42 PM CDT, 39 minutes before

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Special weather statement, May 23, 2:21 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service Grand Forks ND
221 PM CDT Tue May 23 2023

MNZ008-013-014-231945-
East Marshall MN-Red Lake MN-Pennington MN-
221 PM CDT Tue May 23 2023

...Strong thunderstorms will impact portions of south central
Marshall, northeastern Red Lake and Pennington Counties through 245
PM CDT...

At 221 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near St. Hilaire to near Oklee. Movement was
northeast at 10 mph.

HAZARD...Penny size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to outdoor objects is possible.

Locations impacted include...
Thief River Falls, Plummer, St. Hilaire, Goodridge, Mavie, Hazel and
High Landing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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 4793 9561 4794 9570 4791 9571 4784 9602
      4796 9629 4830 9613 4805 9559 4802 9559
      4802 9558 4793 9558
TIME...MOT...LOC 1921Z 220DEG 10KT 4805 9619 4790 9584

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...<30 MPH

Perroux

The office that day

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

Issued	Product	Office	Counties	Lasted
May 23, 1:42 PM CDT	Special Weather Statement	FGF	Pennington, Red Lake	33 min
May 23, 2:46 PM CDT	Special Weather Statement	FGF	Pennington	29 min
May 23, 3:11 PM CDT	Special Weather Statement	FGF	Becker	49 min
May 23, 4:02 PM CDT	Special Weather Statement	FGF	Clay	43 min
May 23, 2:57 AM CDT	Special Weather Statement	FGF	Cass	48 min
May 23, 4:19 PM CDT	Special Weather Statement	FGF	Steele	41 min
May 23, 4:36 PM CDT	Severe Thunderstorm Warning	FGF	Griggs, Steele	39 min
May 23, 4:50 PM CDT	Severe Thunderstorm Warning	FGF	Steele, Traill	40 min
May 23, 5:35 PM CDT	Special Weather Statement	FGF	Steele	40 min
May 23, 6:02 PM CDT	Special Weather Statement	FGF	Griggs	43 min
May 23, 6:16 PM CDT	Special Weather Statement	FGF	Steele	44 min
May 23, 6:41 PM CDT	Special Weather Statement	FGF	Griggs	49 min

Nearby

Special Weather Statements in Minnesota, 2023 Every special weather statement in 2023

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.