Alert archive / Nebraska / Wind Chill Advisories in 2015

Wind Chill Advisory 5, NWS Omaha, NE

January 8, 201519 counties in Nebraska; 4 counties in Iowa

NWS Omaha, NE issued this wind chill advisory at Jan 8, 2015, 3:57 PM CST for 19 counties in Nebraska; 4 counties in Iowa. It took effect at Jan 9, 2015, 2:00 AM CST. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued: Jan 8, 2015, 3:57 PM CST (21:57 UTC)
In effect from: Jan 9, 2015, 2:00 AM CST
Expired: Jan 9, 2015, 8:28 AM CST
In force: 6 hr
Issued by: NWS Omaha, NE

All 23 counties

Harrison County, IA, Monona County, IA, Pottawattamie 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, Douglas County, NE, Knox County, NE, Madison County, NE, Pierce County, NE, Platte County, NE, Sarpy County, NE, Saunders County, NE, Stanton County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE

The radar

The Omaha radar (KOAX), 64 km from the middle of the area, began a volume at 21:54 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, 10.0 hours before the alert went out and 324 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: 1739 m above ground
0-6 km bulk shear: 71 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: 105 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 Jan 7, 5:41 PM CST, 22 hours 16 minutes earlier.

Area forecast discussion, Jan 7, 5:41 PM CST, 22 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
Jan 8, 3:34 AM CST	Winter Weather Advisory	OAX	Antelope, Boone, Burt, Cedar, Colfax, Cuming and 7 more	16 hr

Nearby

Wind Chill Advisories in Nebraska, 2015 Wind Chill Advisories in Iowa, 2015 Every wind chill advisory in 2015

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.