Alert archive / Minnesota / Special Weather Statements in 2019

Special Weather Statement, NWS Grand Forks, ND

August 7, 2019Clearwater County, Minnesota

NWS Grand Forks, ND issued this special weather statement at Aug 7, 2019, 12:24 AM CDT for Clearwater County, Minnesota. It was in force for 51 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 7, 2019, 12:24 AM CDT (05:24 UTC)
Expired: Aug 7, 2019, 1:15 AM CDT
In force: 51 min
Issued by: NWS Grand Forks, ND

County Clearwater County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 184 km from the middle of the area, began a volume at 05:24 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

International Fa, MN (KINL), launched 00:00Z, 5.4 hours before the alert went out and 173 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: 197 J/kg
Mixed-layer CIN: -74 J/kg
Mixed-layer LCL: 1565 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 151 m²/s²
0-3 km storm-relative helicity: 226 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.2

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 Aug 6, 11:49 PM CDT, 35 minutes earlier.

Area forecast discussion, Aug 6, 11:49 PM CDT, 35 minutes before

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Hazardous weather outlook, Aug 6, 5:02 AM CDT, 19 hours 22 minutes before

Hazardous Weather Outlook
National Weather Service Grand Forks ND
502 AM CDT Tue Aug 6 2019

MNZ001>009-013>017-022-023-029-NDZ006>008-014>016-024-026>030-038-
039-049-052>054-071015-
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-Wilkin-Towner-Cavalier-Pembina-Benson-Ramsey-
Eastern Walsh County-Eddy-Nelson-Grand Forks-Griggs-Steele-Traill-
Barnes-Cass-Ransom-Sargent-Richland-Western Walsh County-
502 AM CDT Tue Aug 6 2019

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

.DAY ONE...Today and Tonight

Isolated strong to severe thunderstorms are possible across
eastern North Dakota into northwest Minnesota. The main hazards
will be large hail up to quarter size and damaging wind gusts up
to 60 mph.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters may be needed.

MNZ024-027-028-030>032-040-071015-
Hubbard-West Becker-East Becker-West Otter Tail-East Otter Tail-
Wadena-Grant-
502 AM CDT Tue Aug 6 2019

This hazardous weather outlook is for portions of west central
and northwest Minnesota.

.DAY ONE...Today and Tonight

Scattered thunderstorms are expected to develop this afternoon
into evening within west-central Minnesota. However, the
probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

CJ

In the hours before

Special weather statement, Aug 6, 8:45 PM CDT, 3 hours 39 minutes before

Special Weather Statement
National Weather Service Grand Forks ND
845 PM CDT Tue Aug 6 2019

MNZ001-NDZ027-070215-
West Polk MN-Grand Forks ND-
845 PM CDT Tue Aug 6 2019

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN POLK AND
NORTHEASTERN GRAND FORKS COUNTIES UNTIL 915 PM CDT...

At 845 PM CDT, Doppler radar was tracking a line of strong
thunderstorms extending from Johnstown to Manvel to Grand Forks,
moving southeast at 30 mph.

Half inch hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Grand Forks, East Grand Forks, Manvel, Mallory, Bygland, Davidson and
Key West.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential 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 a safe
shelter inside a building or vehicle.

&&

LAT...LON 4815 9747 4819 9739 4818 9723 4816 9705
      4791 9670 4770 9691 4802 9732 4809 9743
TIME...MOT...LOC 0145Z 298DEG 25KT 4794 9709

BP

Special weather statement, Aug 6, 8:53 PM CDT, 3 hours 31 minutes before

Special Weather Statement
National Weather Service Grand Forks ND
853 PM CDT Tue Aug 6 2019

MNZ008-009-013-070230-
East Marshall MN-North Beltrami MN-Pennington MN-
853 PM CDT Tue Aug 6 2019

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN MARSHALL...WEST
CENTRAL BELTRAMI AND NORTHEASTERN PENNINGTON COUNTIES UNTIL 930 PM
CDT...

At 853 PM CDT, Doppler radar was tracking a strong thunderstorm near
Espelie, or 20 miles northeast of Thief River Falls, moving southeast
at 30 mph.

Penny size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Grygla, Jelle and Espelie.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 4802 9541 4802 9544 4824 9590 4834 9588
      4835 9574 4820 9516
TIME...MOT...LOC 0153Z 298DEG 24KT 4828 9580

BP

Special weather statement, Aug 6, 9:14 PM CDT, 3 hours 10 minutes before

Special Weather Statement
National Weather Service Grand Forks ND
914 PM CDT Tue Aug 6 2019

MNZ001-NDZ027-070300-
West Polk MN-Grand Forks ND-
914 PM CDT Tue Aug 6 2019

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN POLK AND
NORTHEASTERN GRAND FORKS COUNTIES UNTIL 1000 PM CDT...

At 913 PM CDT, Doppler radar was tracking a line of strong
thunderstorms from Johnstown to Manvel to Davidson, moving east at
25 mph.

Penny size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Manvel, Johnstown, Tabor, Davidson, Key West and Sherack.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4812 9748 4817 9746 4818 9738 4813 9700
      4804 9665 4782 9680 4800 9707 4808 9731
TIME...MOT...LOC 0213Z 288DEG 20KT 4810 9720

BP

Special weather statement, Aug 6, 11:39 PM CDT, 45 minutes before

Special Weather Statement
National Weather Service Grand Forks ND
1139 PM CDT Tue Aug 6 2019

MNZ005-006-070530-
Roseau MN-Lake Of The Woods MN-
1139 PM CDT Tue Aug 6 2019

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN ROSEAU AND WEST
CENTRAL LAKE OF THE WOODS COUNTIES UNTIL 1230 AM CDT...

At 1139 PM CDT, Doppler radar was tracking a strong thunderstorm near
Roseau, moving east at 35 mph.

Nickel size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Roseau, Warroad, Salol, Fox, Malung and Swift.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
office in Grand Forks.

&&

LAT...LON 4873 9597 4887 9597 4892 9516 4871 9516
TIME...MOT...LOC 0439Z 270DEG 32KT 4882 9582

BP

Special weather statement, Aug 6, 11:43 PM CDT, 41 minutes before

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Special weather statement, Aug 7, 12:24 AM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 7:52 PM CDT	Special Weather Statement	FGF	Pennington	23 min
Aug 6, 8:14 PM CDT	Special Weather Statement	FGF	Pennington	31 min
Aug 6, 8:53 PM CDT	Special Weather Statement	FGF	Pennington	37 min
Aug 6, 11:39 PM CDT	Special Weather Statement	FGF	Roseau	51 min
Aug 6, 11:43 PM CDT	Special Weather Statement	FGF	Hubbard	47 min
Aug 6, 7:03 PM CDT	Severe Thunderstorm Warning	FGF	Eddy	27 min
Aug 6, 7:22 PM CDT	Special Weather Statement	FGF	Eddy	38 min
Aug 6, 7:27 PM CDT	Special Weather Statement	FGF	Eddy	18 min
Aug 6, 7:55 PM CDT	Special Weather Statement	FGF	Eddy	35 min
Aug 6, 8:06 PM CDT	Special Weather Statement	FGF	Grand Forks	39 min
Aug 6, 8:45 PM CDT	Special Weather Statement	FGF	Grand Forks	30 min
Aug 6, 9:14 PM CDT	Special Weather Statement	FGF	Grand Forks	46 min

Nearby

Special Weather Statements in Minnesota, 2019 Every special weather statement in 2019

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.