Alert archive / North Dakota / Frost Advisories in 2018

Frost Advisory 5, NWS Bismarck, ND

September 25, 201823 counties in North Dakota

NWS Bismarck, ND issued this frost advisory at Sep 25, 2018, 1:06 PM MDT for 23 counties in North Dakota. It took effect at Sep 26, 2018, 12:00 AM MDT. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Sep 25, 2018, 1:06 PM MDT (19:06 UTC)
In effect from: Sep 26, 2018, 12:00 AM MDT
Expired: Sep 26, 2018, 6:52 AM MDT
In force: 7 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 19:05 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, 7.1 hours before the alert went out and 135 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: 481 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: -22 m²/s²
0-3 km storm-relative helicity: -11 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 frost 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 frost advisory went out at Sep 25, 11:18 AM MDT, 1 hour 48 minutes earlier.

Area forecast discussion, Sep 25, 11:18 AM MDT, 1 hour 48 minutes before

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Hazardous weather outlook, Sep 25, 1:06 PM MDT, 0 minutes before

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</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <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.
      </p>
      <p id="message2">
        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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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 25, 2:11 AM MDT	Wind Advisory	BIS	Adams, Bowman, Hettinger, Slope	16 hr

Nearby

Frost Advisories in North Dakota, 2018 Every frost advisory in 2018

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.