Alert archive / North Dakota / Winter Weather Advisories in 2021

Winter Weather Advisory 16, NWS Grand Forks, ND

December 24, 20215 counties in North Dakota; 4 counties in Minnesota

NWS Grand Forks, ND issued this winter weather advisory at Dec 24, 2021, 2:08 PM CST for 5 counties in North Dakota; 4 counties in Minnesota. It took effect at Dec 25, 2021, 6:00 AM CST. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued: Dec 24, 2021, 2:08 PM CST (20:08 UTC)
In effect from: Dec 25, 2021, 6:00 AM CST
Expired: Dec 25, 2021, 6:00 PM CST
In force: 12 hr
Issued by: NWS Grand Forks, ND

Counties Becker County, MN, Clay County, MN, Otter Tail County, MN, Wilkin County, MN, Barnes County, ND, Cass County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 110 km from the middle of the area, began a volume at 20:10 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

Bismarck Municip, ND (KBIS), launched 12:00Z, 8.1 hours before the alert went out and 292 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1509 m above ground
0-6 km bulk shear: 70 kt
0-1 km storm-relative helicity: -141 m²/s²
0-3 km storm-relative helicity: -81 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 winter weather advisory 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 winter weather advisory went out at Dec 24, 2:05 PM CST, 3 minutes earlier.

Area forecast discussion, Dec 24, 2:05 PM CST, 3 minutes before

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Hazardous weather outlook, Dec 24, 9:03 AM CST, 5 hours 5 minutes before

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In the hours before

Special weather statement, Dec 24, 2:08 PM CST, 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
Dec 24, 1:14 AM CST	Winter Weather Advisory	FGF	Benson, Cavalier, Eddy, Nelson, Pembina, Ramsey and 2 more	5 hr
Dec 24, 2:08 PM CST	Wind Chill Advisory	FGF	Benson, Cavalier, Ramsey, Towner, Walsh	17 hr

Nearby

Winter Weather Advisories in North Dakota, 2021 Winter Weather Advisories in Minnesota, 2021 Every winter weather advisory in 2021

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.