Alert archive / Nebraska / Frost Advisories in 2007

Frost Advisory 1, NWS Cheyenne, WY

June 7, 2007Crook County, Weston County, Wyoming; 7 counties in Nebraska

NWS Cheyenne, WY issued this frost advisory at Jun 7, 2007, 3:18 PM MDT for Crook County, Weston County, Wyoming; 7 counties in Nebraska. It took effect at Jun 8, 2007, 12:00 AM MDT. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Jun 7, 2007, 3:18 PM MDT (21:18 UTC)
In effect from: Jun 8, 2007, 12:00 AM MDT
Expired: Jun 8, 2007, 7:16 AM MDT
In force: 7 hr
Issued by: NWS Cheyenne, WY

Counties Banner County, NE, Box Butte County, NE, Cheyenne County, NE, Dawes County, NE, Kimball County, NE, Morrill County, NE, Scotts Bluff County, NE, Crook County, WY, Weston County, WY

The radar

The Cheyenne radar (KCYS), 164 km from the middle of the area, began a volume at 21:19 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 (KUNR), launched 12:00Z, 9.3 hours before the alert went out and 203 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: 50 J/kg
Mixed-layer CIN: -37 J/kg
Mixed-layer LCL: 1156 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 25 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 frost advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Cheyenne, WY wrote its last area forecast discussion before this frost advisory went out at Jun 7, 3:15 AM MDT, 12 hours 3 minutes earlier.

Area forecast discussion, Jun 7, 3:15 AM MDT, 12 hours 3 minutes before

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Hazardous weather outlook, Jun 7, 10:35 AM MDT, 4 hours 43 minutes before

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In the hours before

Local storm report, Jun 7, 9:46 AM MDT, 5 hours 32 minutes before

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<body>
  <main class="wrap">
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      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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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 Cheyenne, WY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 7, 3:18 PM MDT	Freeze Warning	CYS		16 hr

Nearby

Frost Advisories in Nebraska, 2007 Frost Advisories in Wyoming, 2007 Every frost advisory in 2007

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.