Alert archive / Nebraska / Wind Chill Advisories in 2017

Wind Chill Advisory 6, NWS Hastings, NE

December 29, 20175 counties in Nebraska

NWS Hastings, NE issued this wind chill advisory at Dec 29, 2017, 2:51 PM CST for 5 counties in Nebraska. It took effect at Dec 30, 2017, 2:00 AM CST. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued
Dec 29, 2017, 2:51 PM CST (20:51 UTC)
In effect from
Dec 30, 2017, 2:00 AM CST
Expired
Dec 30, 2017, 12:00 PM CST
In force
10 hr
Issued by
NWS Hastings, NE

Counties Greeley County, NE, Merrick County, NE, Nance County, NE, Polk County, NE, Valley County, NE

The radar

The Grand Island radar (KUEX), 119 km from the middle of the area, began a volume at 20:54 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

Omaha, NE (KOAX), launched 12:00Z, 8.9 hours before the alert went out and 155 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-pSkew-T log-p diagram, Omaha, NE at 12:00Z on 2017-12-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Omaha, NE at 12:00Z on 2017-12-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 233 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
965 m above ground
0-6 km bulk shear
83 kt
0-1 km storm-relative helicity
233 m²/s²
0-3 km storm-relative helicity
637 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 29, 2:51 PM CSTWind Chill WatchGIDAdams, Buffalo, Clay, Dawson, Fillmore, Franklin and 18 more13 hr

Nearby

Wind Chill Advisories in Nebraska, 2017Every wind chill advisory in 2017

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.