Alert archive / Minnesota / Special Weather Statements in 2015

Special Weather Statement, NWS Grand Forks, ND

August 8, 2015Mahnomen County, Minnesota

NWS Grand Forks, ND issued this special weather statement at Aug 8, 2015, 12:05 AM CDT for Mahnomen County, Minnesota. It was in force for 55 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 8, 2015, 12:05 AM CDT (05:05 UTC)
Expired: Aug 8, 2015, 1:00 AM CDT
In force: 55 min
Issued by: NWS Grand Forks, ND

County Mahnomen County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 164 km from the middle of the area, began a volume at 05:07 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, 5.1 hours before the alert went out and 199 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: 1843 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 834 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 149 m²/s²
0-3 km storm-relative helicity: 144 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 7.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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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 7, 11:41 PM CDT, 24 minutes earlier.

Area forecast discussion, Aug 7, 11:41 PM CDT, 24 minutes before

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Hazardous weather outlook, Aug 7, 5:22 AM CDT, 18 hours 43 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GRAND FORKS ND
522 AM CDT FRI AUG 7 2015

MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024-
026>030-038-039-049-052>054-081200-
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-
522 AM CDT FRI AUG 7 2015

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 THIS AFTERNOON AND
EVENING...ESPECIALLY ACROSS NORTHEAST NORTH DAKOTA AND NORTHWEST
MINNESOTA. THE MAIN THREATS WILL BE HAIL OF ONE INCH OR
LARGER...AND DAMAGING WIND GUSTS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

THUNDERSTORMS ARE POSSIBLE AT SOME POINT THIS WEEKEND...AND AGAIN
TOWARD THE END OF THE NEXT WORK WEEK. SEVERE STORMS ARE NOT
EXPECTED THIS WEEKEND.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS POSSIBLE THIS AFTERNOON.

TG

In the hours before

Local storm report, Aug 7, 9:55 PM CDT, 2 hours 10 minutes before

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Local storm report, Aug 7, 10:04 PM CDT, 2 hours 1 minute before

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Special weather statement, Aug 7, 10:18 PM CDT, 1 hour 47 minutes before

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Local storm report, Aug 7, 10:36 PM CDT, 1 hour 29 minutes before

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Local storm report, Aug 7, 10:41 PM CDT, 1 hour 24 minutes before

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Special weather statement, Aug 8, 12:05 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 7, 7:40 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Traill	65 min
Aug 7, 8:10 PM CDT	Severe Thunderstorm Warning	FGF	Roseau	65 min
Aug 7, 8:39 PM CDT	Severe Thunderstorm Warning	FGF	Clay, Norman	66 min
Aug 7, 8:48 PM CDT	Severe Thunderstorm Warning	FGF	Lake of the Woods, Roseau	57 min
Aug 7, 9:11 PM CDT	Severe Thunderstorm Warning	FGF	Beltrami, Lake of the Woods, Marshall, Pennington, Roseau	64 min
Aug 7, 10:18 PM CDT	Special Weather Statement	FGF	Beltrami	57 min
Aug 8, 2:55 AM CDT	Special Weather Statement	FGF	Becker	65 min
Aug 8, 5:13 AM CDT	Special Weather Statement	FGF	Wadena	47 min

Nearby

Special Weather Statements in Minnesota, 2015 Every special weather statement in 2015

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.