Alert archive / Nebraska / Winter Storm Warnings in 2019

Winter Storm Warning 7, NWS Omaha, NE

December 27, 2019Antelope County, Knox County, Pierce County, Nebraska

NWS Omaha, NE issued this winter storm warning at Dec 27, 2019, 3:29 PM CST for Antelope County, Knox County, Pierce County, Nebraska. It took effect at Dec 28, 2019, 9:00 PM CST. It was in force for 33 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
Dec 27, 2019, 3:29 PM CST (21:29 UTC)
In effect from
Dec 28, 2019, 9:00 PM CST
Expired
Dec 30, 2019, 6:00 AM CST
In force
33 hr
Issued by
NWS Omaha, NE

Counties Antelope County, NE, Knox County, NE, Pierce County, NE

The radar

The Sioux Falls radar (KFSD), 164 km from the middle of the area, began a volume at 21:29 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

Aberdeen, SD (KABR), launched 12:00Z, 9.5 hours before the alert went out and 286 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, Aberdeen, SD at 12:00Z on 2019-12-27Temperature 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, Aberdeen, SD at 12:00Z on 2019-12-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -29 square meters per square second.19395878Sfc1 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
1184 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
-29 m²/s²
0-3 km storm-relative helicity
16 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 27, 3:22 AM CSTWinter Weather AdvisoryOAXAntelope, Boone, Cedar, Colfax, Cuming, Knox and 6 more24 hr
Dec 27, 3:29 PM CSTWinter Weather AdvisoryOAXAntelope, Boone, Cedar, Colfax, Cuming, Knox and 6 more3 days

Nearby

Winter Storm Warnings in Nebraska, 2019Every winter storm warning in 2019

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.