Alert archive / Nebraska / Freeze Warnings in 2011

Freeze Warning 1, NWS Hastings, NE

May 1, 201112 counties in Nebraska

NWS Hastings, NE issued this freeze warning at May 1, 2011, 2:31 PM CDT for 12 counties in Nebraska. It took effect at May 2, 2011, 4:00 AM CDT. It was in force for 4 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 1, 2011, 2:31 PM CDT (19:31 UTC)
In effect from: May 2, 2011, 4:00 AM CDT
Expired: May 2, 2011, 8:00 AM CDT
In force: 4 hr
Issued by: NWS Hastings, NE

Counties Buffalo County, NE, Dawson County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Howard County, NE, Merrick County, NE, Nance County, NE, Polk County, NE, Sherman County, NE, Valley County, NE, York County, NE

The radar

The Grand Island radar (KUEX), 91 km from the middle of the area, began a volume at 19:33 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

Omaha, NE (KOAX), launched 12:00Z, 7.5 hours before the alert went out and 177 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: 2251 m above ground
0-6 km bulk shear: 92 kt
0-1 km storm-relative helicity: -319 m²/s²
0-3 km storm-relative helicity: 81 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 Hastings, NE wrote its last area forecast discussion before this freeze warning went out at May 1, 12:02 PM CDT, 2 hours 29 minutes earlier.

Area forecast discussion, May 1, 12:02 PM CDT, 2 hours 29 minutes before

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Hazardous weather outlook, May 1, 5:02 AM CDT, 9 hours 29 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 Hastings, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 1, 2:31 PM CDT	Frost Advisory	GID	Adams, Clay, Fillmore, Franklin, Furnas, Gosper and 6 more	17 hr

Nearby

Freeze Warnings in Nebraska, 2011 Every freeze warning in 2011

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.