Alert archive / Nebraska / Freeze Warnings in 2014

Freeze Warning 1, NWS Cheyenne, WY

May 12, 20148 counties in Nebraska

NWS Cheyenne, WY issued this freeze warning at May 12, 2014, 7:03 PM MDT for 8 counties in Nebraska. It took effect at May 12, 2014, 9:00 PM MDT. It was in force for 11 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: May 12, 2014, 7:03 PM MDT (01:03 UTC)
In effect from: May 12, 2014, 9:00 PM MDT
Expired: May 13, 2014, 8:00 AM MDT
In force: 11 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, Sioux County, NE

The radar

The Cheyenne radar (KCYS), 142 km from the middle of the area, began a volume at 01:01 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 1.1 hours before the alert went out and 246 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: 1625 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: -111 m²/s²
0-3 km storm-relative helicity: 76 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 Cheyenne, WY wrote its last area forecast discussion before this freeze warning went out at May 12, 5:35 PM MDT, 1 hour 28 minutes earlier.

Area forecast discussion, May 12, 5:35 PM MDT, 1 hour 28 minutes before

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Hazardous weather outlook, May 12, 9:15 AM MDT, 9 hours 48 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 13, 2:45 PM MDT	Freeze Warning	CYS	Banner, Cheyenne, Kimball, Morrill, Scotts Bluff	16 hr

Nearby

Freeze Warnings in Nebraska, 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.