Alert archive / North Dakota / Freeze Warnings in 2014

Freeze Warning 4, NWS Bismarck, ND

September 11, 201423 counties in North Dakota

NWS Bismarck, ND issued this freeze warning at Sep 11, 2014, 2:21 AM MDT for 23 counties in North Dakota. It took effect at Sep 12, 2014, 12:00 AM MDT. It was in force for 8 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 11, 2014, 2:21 AM MDT (08:21 UTC)
In effect from: Sep 12, 2014, 12:00 AM MDT
Expired: Sep 12, 2014, 8:03 AM MDT
In force: 8 hr
Issued by: NWS Bismarck, ND

All 23 counties

Adams County, ND, Billings County, ND, Bottineau County, ND, Bowman County, ND, Burke County, ND, Burleigh County, ND, Divide County, ND, Dunn County, ND, Golden Valley County, ND, Grant County, ND, Hettinger 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, Slope County, ND, Stark County, ND, Williams County, ND

The radar

The Bismarck radar (KBIS), 132 km from the middle of the area, began a volume at 08:24 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

Rapid City, SD (KRAP), launched 00:00Z, 8.4 hours before the alert went out and 390 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: 532 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 47 m²/s²
0-3 km storm-relative helicity: 139 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 freeze warning 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 freeze warning went out at Sep 10, 5:19 PM MDT, 9 hours 2 minutes earlier.

Area forecast discussion, Sep 10, 5:19 PM MDT, 9 hours 2 minutes before

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Hazardous weather outlook, Sep 10, 2:20 PM MDT, 12 hours 1 minute before

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      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 11, 1:40 PM MDT	Frost Advisory	BIS	Dickey, Emmons, Foster, Kidder, LaMoure, Logan and 3 more	18 hr

Nearby

Freeze Warnings in North Dakota, 2014 Every freeze warning in 2014

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.