Alert archive / Minnesota / Special Weather Statements in 2017

Special Weather Statement, NWS Grand Forks, ND

September 22, 2017Kittson County, Minnesota

NWS Grand Forks, ND issued this special weather statement at Sep 22, 2017, 12:34 AM CDT for Kittson County, Minnesota. It was in force for 56 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: Sep 22, 2017, 12:34 AM CDT (05:34 UTC)
Expired: Sep 22, 2017, 1:30 AM CDT
In force: 56 min
Issued by: NWS Grand Forks, ND

County Kittson County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 126 km from the middle of the area, began a volume at 05:35 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

Aberdeen, SD (KABR), launched 00:00Z, 5.6 hours before the alert went out and 430 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: 937 J/kg
Mixed-layer CIN: -128 J/kg
Mixed-layer LCL: 1608 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 87 m²/s²
0-3 km storm-relative helicity: 115 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 4.1

Open this sounding in Storm Lab

The text

As transmitted.

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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 22, 3:02 AM CDT	Severe Thunderstorm Warning	FGF	Grant, Otter Tail, Wilkin	28 min
Sep 22, 3:27 AM CDT	Severe Thunderstorm Warning	FGF	Grant, Otter Tail	48 min
Sep 22, 4:14 AM CDT	Special Weather Statement	FGF	Wadena	46 min

Nearby

Special Weather Statements in Minnesota, 2017 Every special weather statement in 2017

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.