Alert archive / North Dakota / Winter Weather Advisories in 2021

Winter Weather Advisory 4, NWS Bismarck, ND

April 12, 202116 counties in North Dakota

NWS Bismarck, ND issued this winter weather advisory at Apr 12, 2021, 2:32 PM CDT for 16 counties in North Dakota. It took effect at Apr 12, 2021, 7:00 PM CDT. It was in force for 23 hr.

The area

The counties it named.

The facts

Issued: Apr 12, 2021, 2:32 PM CDT (19:32 UTC)
In effect from: Apr 12, 2021, 7:00 PM CDT
Expired: Apr 13, 2021, 6:00 PM CDT
In force: 23 hr
Issued by: NWS Bismarck, ND

Counties Bottineau County, ND, Burke County, ND, Divide County, ND, Dunn County, ND, Foster 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, Wells County, ND, Williams County, ND

The radar

The Minot AFB radar (KMBX), 55 km from the middle of the area, began a volume at 19:32 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, 7.5 hours before the alert went out and 154 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: 551 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 88 m²/s²
0-3 km storm-relative helicity: 97 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 Apr 12, 12:47 PM CDT, 1 hour 45 minutes earlier.

Area forecast discussion, Apr 12, 12:47 PM CDT, 1 hour 45 minutes before

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Hazardous weather outlook, Apr 12, 1:56 PM CDT, 36 minutes before

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In the hours before

Local storm report, Apr 12, 1:52 PM CDT, 40 minutes before

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Local storm report, Apr 12, 1:53 PM CDT, 39 minutes before

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Local storm report, Apr 12, 1:55 PM CDT, 37 minutes before

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Local storm report, Apr 12, 1:56 PM CDT, 36 minutes before

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Local storm report, Apr 12, 1:59 PM CDT, 33 minutes before

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Local storm report, Apr 12, 2:00 PM CDT, 32 minutes before

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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.