Alert archive / Minnesota / Dense Fog Advisories in 2021

Dense Fog Advisory 4, NWS Grand Forks, ND

January 7, 2021Wadena County, Minnesota

NWS Grand Forks, ND issued this dense fog advisory at Jan 7, 2021, 5:02 PM CST for Wadena County, Minnesota. It took effect at Jan 7, 2021, 8:00 PM CST. It was in force for 15 hr.

The area

The counties it named.

The facts

Issued: Jan 7, 2021, 5:02 PM CST (23:02 UTC)
In effect from: Jan 7, 2021, 8:00 PM CST
Expired: Jan 8, 2021, 11:00 AM CST
In force: 15 hr
Issued by: NWS Grand Forks, ND

County Wadena County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 207 km from the middle of the area, began a volume at 23:03 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

Minneapolis, MN (KMPX), launched 12:00Z, 11.0 hours before the alert went out and 220 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: 1459 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 7 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 dense fog 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 dense fog advisory went out at Jan 7, 3:02 PM CST, 2 hours earlier.

Area forecast discussion, Jan 7, 3:02 PM CST, 2 hours before

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Hazardous weather outlook, Jan 7, 2:52 PM CST, 2 hours 10 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
Jan 6, 10:36 PM CST	Dense Fog Advisory	FGF	Barnes, Benson, Cavalier, Eddy, Griggs, Nelson and 6 more	10 hr
Jan 7, 9:03 AM CST	Dense Fog Advisory	FGF	Barnes, Cass, Cavalier, Grand Forks, Griggs, Nelson and 9 more	26 hr

Nearby

Dense Fog Advisories in Minnesota, 2021 Every dense fog 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.