Alert archive / Minnesota / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 197, NWS Grand Forks, ND

September 20, 2019Lake of the Woods County, Roseau County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Sep 20, 2019, 1:55 PM CDT for Lake of the Woods County, Roseau County, Minnesota. It was in force for 50 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 20, 2019, 1:55 PM CDT (18:55 UTC)
Expired: Sep 20, 2019, 2:45 PM CDT
In force: 50 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Lake of the Woods County, MN, Roseau County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 201 km from the middle of the area, began a volume at 18:57 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 12:00Z, 6.9 hours before the alert went out and 153 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: 8 J/kg
Mixed-layer CIN: -420 J/kg
Mixed-layer LCL: 946 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 81 m²/s²
0-3 km storm-relative helicity: 135 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Sep 20, 1:00 PM CDT, 55 minutes earlier.

Area forecast discussion, Sep 20, 1:00 PM CDT, 55 minutes before

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Hazardous weather outlook, Sep 20, 4:20 AM CDT, 9 hours 35 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Grand Forks ND
420 AM CDT Fri Sep 20 2019

MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024-
026>030-038-039-049-052>054-210930-
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 County-Eddy-Nelson-
Grand Forks-Griggs-Steele-Traill-Barnes-Cass-Ransom-Sargent-
Richland-Western Walsh County-
420 AM CDT Fri Sep 20 2019

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

.DAY ONE...Today and Tonight

Isolated severe thunderstorms are possible across southeast North
Dakota before sunrise this morning. The main hazard will be golf
ball sized hail.

Scattered severe thunderstorms are possible late this afternoon
and tonight. The main hazards will be hail up to 2 inches in
diameter and damaging wind gusts up to 75 mph. Isolated tornadoes
are also possible. Very heavy rainfall is also possible with the
storms, which may result in localized flooding.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

For areas along and east of the Red River Valley, isolated severe
thunderstorms are possible early Saturday morning. Then by early
afternoon, the isolated severe thunderstorm threat should shift
into areas east of the Red River Valley. Quarter sized hail and
wind gusts to 60 mph would be the main hazards.

.SPOTTER INFORMATION STATEMENT...

Weather spotters may be needed late this afternoon and tonight.

In the hours before

Local storm report, Sep 20, 11:25 AM CDT, 2 hours 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1125 AM CDT FRI SEP 20 2019

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

0759 AM     HAIL             4 E NECHE               48.98N 97.46W
09/20/2019  E0.75 INCH       Pembina            ND   PUBLIC

            HAIL TO THE SIZE OF PENNIES.

&&

BWASILEW

Special weather statement, Sep 20, 11:32 AM CDT, 2 hours 23 minutes before

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Local storm report, Sep 20, 12:00 PM CDT, 1 hour 55 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1200 PM CDT FRI SEP 20 2019

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

0415 AM     TSTM WND DMG     GWINNER                 46.22N 97.66W
09/20/2019                   SARGENT            ND   PUBLIC

            REPORT OF SMALL BRANCHES DOWN

&&

BWASILEW

Local storm report, Sep 20, 12:02 PM CDT, 1 hour 53 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1202 PM CDT FRI SEP 20 2019

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

1115 AM     HEAVY RAIN       WALHALLA                48.92N 97.92W
09/20/2019  M2.30 INCH       PEMBINA            ND   PUBLIC

&&

BWASILEW

Special weather statement, Sep 20, 12:18 PM CDT, 1 hour 37 minutes before

Special Weather Statement
National Weather Service Grand Forks ND
1218 PM CDT Fri Sep 20 2019

MNZ005-008-201800-
East Marshall MN-Roseau MN-
1218 PM CDT Fri Sep 20 2019

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN MARSHALL AND SOUTH
CENTRAL ROSEAU COUNTIES UNTIL 100 PM CDT...

At 1218 PM CDT, Doppler radar was tracking a strong thunderstorm near
Gatzke, or 23 miles south of Roseau, moving northeast at 30 mph.

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

Locations impacted include...
Wannaska, Gatzke, Malung, Hayes Lake State Park, Pencer, Casperson
and Skime.

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 4862 9542 4854 9552 4854 9560 4847 9560
      4823 9588 4832 9605 4856 9601 4881 9577
TIME...MOT...LOC 1718Z 225DEG 28KT 4850 9582

Lynch

Local storm report, Sep 20, 1:35 PM CDT, 20 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
Sep 20, 9:58 AM CDT	Special Weather Statement	FGF	Kittson	32 min
Sep 20, 11:10 AM CDT	Special Weather Statement	FGF	Roseau	35 min
Sep 20, 11:32 AM CDT	Special Weather Statement	FGF	Kittson	28 min
Sep 20, 12:18 PM CDT	Special Weather Statement	FGF	Roseau	42 min
Sep 20, 12:25 PM CDT	Severe Thunderstorm Warning	FGF	Marshall, Roseau	50 min
Sep 20, 12:44 PM CDT	Severe Thunderstorm Warning	FGF	Roseau	46 min
Sep 20, 1:10 PM CDT	Severe Thunderstorm Warning	FGF	Roseau	35 min
Sep 20, 1:30 PM CDT	Severe Thunderstorm Warning	FGF	Lake of the Woods, Roseau	60 min
Sep 20, 2:13 PM CDT	Areal Flood Advisory	FGF	Roseau	4 hr
Sep 20, 2:36 PM CDT	Special Weather Statement	FGF	Lake of the Woods, Roseau	54 min
Sep 20, 3:37 PM CDT	Special Weather Statement	FGF	Lake of the Woods	53 min
Sep 20, 4:26 PM CDT	Special Weather Statement	FGF	Lake of the Woods	64 min
Sep 20, 6:21 PM CDT	Flash Flood Warning	FGF	Kittson	24 min
Sep 20, 6:34 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Clay, Otter Tail	56 min
Sep 20, 3:36 AM CDT	Severe Thunderstorm Warning	FGF	Sargent	39 min
Sep 20, 4:07 AM CDT	Severe Thunderstorm Warning	FGF	Ransom, Sargent	38 min
Sep 20, 4:50 AM CDT	Special Weather Statement	FGF	Cass, Ransom	55 min
Sep 20, 7:39 AM CDT	Special Weather Statement	FGF	Pembina	66 min
Sep 20, 7:54 AM CDT	Special Weather Statement	FGF	Pembina	36 min
Sep 20, 7:59 AM CDT	Severe Thunderstorm Warning	FGF	Pembina	31 min
Sep 20, 8:12 AM CDT	Severe Thunderstorm Warning	FGF	Cavalier	33 min
Sep 20, 8:32 AM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Towner	43 min
Sep 20, 8:35 AM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Pembina	40 min
Sep 20, 8:59 AM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Pembina, Ramsey, Walsh	61 min
Sep 20, 9:13 AM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Pembina	32 min
Sep 20, 9:47 AM CDT	Special Weather Statement	FGF	Pembina	58 min
Sep 20, 4:32 PM CDT	Special Weather Statement	FGF	Benson	28 min
Sep 20, 4:52 PM CDT	Special Weather Statement	FGF	Benson	23 min
Sep 20, 4:59 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Pembina, Walsh	46 min
Sep 20, 5:04 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Ramsey, Towner	56 min
Sep 20, 5:28 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Cavalier, Ramsey, Towner	47 min
Sep 20, 5:43 PM CDT	Special Weather Statement	FGF	Pembina	32 min
Sep 20, 5:50 PM CDT	Special Weather Statement	FGF	Towner	40 min
Sep 20, 5:52 PM CDT	Special Weather Statement	FGF	Benson	38 min
Sep 20, 5:59 PM CDT	Tornado Warning	FGF	Cavalier, Towner	25 min
Sep 20, 6:11 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Ramsey, Towner	64 min
Sep 20, 6:15 PM CDT	Flash Flood Warning	FGF	Benson, Ramsey	30 min
Sep 20, 6:17 PM CDT	Special Weather Statement	FGF	Pembina	43 min
Sep 20, 6:22 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Richland	38 min
Sep 20, 6:31 PM CDT	Special Weather Statement	FGF	Benson	59 min
Sep 20, 6:49 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Steele, Traill	41 min
Sep 20, 6:57 PM CDT	Special Weather Statement	FGF	Pembina	63 min
Sep 20, 6:58 PM CDT	Flash Flood Warning	FGF	Benson, Cavalier, Ramsey, Towner	3 hr

Nearby

Severe Thunderstorm Warnings in Minnesota, 2019 Every severe thunderstorm warning 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.