Alert archive / North Dakota / Winter Weather Advisories in 2021

Winter Weather Advisory 9, NWS Bismarck, ND

December 4, 202122 counties in North Dakota

NWS Bismarck, ND issued this winter weather advisory at Dec 4, 2021, 4:39 AM CST for 22 counties in North Dakota. It took effect at Dec 4, 2021, 3:00 PM CST. It was in force for 30 hr.

The area

The counties it named.

The facts

Issued: Dec 4, 2021, 4:39 AM CST (10:39 UTC)
In effect from: Dec 4, 2021, 3:00 PM CST
Expired: Dec 5, 2021, 9:00 PM CST
In force: 30 hr
Issued by: NWS Bismarck, ND

All 22 counties

Bottineau County, ND, Burke County, ND, Burleigh County, ND, Dickey County, ND, Divide County, ND, Dunn County, ND, Foster County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McHenry County, ND, McKenzie County, ND, Mercer County, ND, Mountrail County, ND, Oliver County, ND, Pierce County, ND, Renville County, ND, Rolette County, ND, Sheridan County, ND, Stutsman County, ND, Wells County, ND, Williams County, ND

The radar

The Minot AFB radar (KMBX), 79 km from the middle of the area, began a volume at 10:39 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, 10.7 hours before the alert went out and 362 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: 1865 m above ground
0-6 km bulk shear: 88 kt
0-1 km storm-relative helicity: -45 m²/s²
0-3 km storm-relative helicity: 47 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 Bismarck, ND wrote its last area forecast discussion before this winter weather advisory went out at Dec 4, 4:16 AM CST, 23 minutes earlier.

Area forecast discussion, Dec 4, 4:16 AM CST, 23 minutes before

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Hazardous weather outlook, Dec 4, 1:05 AM CST, 3 hours 34 minutes before

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The office that day

Everything else NWS Bismarck, ND issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 4, 3:33 AM CST	High Wind Watch	BIS	Adams, Billings, Bowman, Dickey, Emmons, Golden Valley and 7 more	11 hr
Dec 4, 4:39 AM CST	Winter Storm Warning	BIS	Bottineau, Burke, Divide, Foster, McHenry, Mountrail and 6 more	32 hr
Dec 4, 2:17 PM CST	High Wind Warning	BIS	Adams, Billings, Bowman, Emmons, Golden Valley, Grant and 4 more	23 hr

Nearby

Winter Weather Advisories in North Dakota, 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.