Alert archive / Nebraska / Wind Chill Advisories in 2014

Wind Chill Advisory 6, NWS Omaha, NE

February 4, 201430 counties in Nebraska; 8 counties in Iowa

NWS Omaha, NE issued this wind chill advisory at Feb 4, 2014, 3:13 AM CST for 30 counties in Nebraska; 8 counties in Iowa. It took effect at Feb 5, 2014, 12:00 AM CST. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued: Feb 4, 2014, 3:13 AM CST (09:13 UTC)
In effect from: Feb 5, 2014, 12:00 AM CST
Expired: Feb 5, 2014, 11:00 AM CST
In force: 11 hr
Issued by: NWS Omaha, NE

All 38 counties

Fremont County, IA, Harrison County, IA, Mills County, IA, Monona County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Shelby County, IA, Antelope County, NE, Boone County, NE, Burt County, NE, Butler County, NE, Cass County, NE, Cedar County, NE, Colfax County, NE, Cuming County, NE, Dodge County, NE, Douglas County, NE, Gage County, NE, Jefferson County, NE, Johnson County, NE, Knox County, NE, Lancaster County, NE, Madison County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Pierce County, NE, Platte County, NE, Richardson County, NE, Saline County, NE, Sarpy 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), 16 km from the middle of the area, began a volume at 09:11 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, 9.2 hours before the alert went out and 338 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: 744 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 9 m²/s²
0-3 km storm-relative helicity: -99 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 wind chill advisory 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 wind chill advisory went out at Feb 4, 2:57 AM CST, 16 minutes earlier.

Area forecast discussion, Feb 4, 2:57 AM CST, 16 minutes before

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Hazardous weather outlook, Feb 3, 2:07 PM CST, 13 hours 6 minutes before

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Nearby

Wind Chill Advisories in Nebraska, 2014 Wind Chill Advisories in Iowa, 2014 Every wind chill advisory 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.