Alert archive / Nebraska / Freeze Warnings in 2012

Freeze Warning 5, NWS Omaha, NE

October 4, 201219 counties in Nebraska; Harrison County, Monona County, Shelby County, Iowa

NWS Omaha, NE issued this freeze warning at Oct 4, 2012, 3:28 PM CDT for 19 counties in Nebraska; Harrison County, Monona County, Shelby County, Iowa. It took effect at Oct 5, 2012, 1:00 AM CDT. 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: Oct 4, 2012, 3:28 PM CDT (20:28 UTC)
In effect from: Oct 5, 2012, 1:00 AM CDT
Expired: Oct 5, 2012, 9:03 AM CDT
In force: 8 hr
Issued by: NWS Omaha, NE

All 22 counties

Harrison County, IA, Monona County, IA, Shelby County, IA, Antelope County, NE, Boone County, NE, Burt County, NE, Butler County, NE, Cedar County, NE, Colfax County, NE, Cuming County, NE, Dodge County, NE, Knox County, NE, Lancaster County, NE, Madison County, NE, Pierce County, NE, Platte County, NE, Saunders County, NE, Seward County, NE, Stanton County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE

The radar

The Omaha radar (KOAX), 70 km from the middle of the area, began a volume at 20:28 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 12:00Z, 8.5 hours before the alert went out and 314 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: 960 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: -237 m²/s²
0-3 km storm-relative helicity: -49 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 Omaha, NE wrote its last area forecast discussion before this freeze warning went out at Oct 3, 6:34 PM CDT, 20 hours 54 minutes earlier.

Area forecast discussion, Oct 3, 6:34 PM CDT, 20 hours 54 minutes before

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Hazardous weather outlook, Oct 3, 4:12 PM CDT, 23 hours 16 minutes before

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The office that day

Everything else NWS Omaha, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 4, 9:08 AM CDT	Special Weather Statement	OAX	Pawnee	37 min
Oct 4, 9:34 AM CDT	Special Weather Statement	OAX	Richardson	26 min

Nearby

Freeze Warnings in Nebraska, 2012 Freeze Warnings in Iowa, 2012 Every freeze warning in 2012

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.