Alert archive / Nebraska / Winter Storm Warnings in 2018

Winter Storm Warning 8, NWS Omaha, NE

November 29, 201816 counties in Nebraska; 5 counties in Iowa

NWS Omaha, NE issued this winter storm warning at Nov 29, 2018, 3:09 PM CST for 16 counties in Nebraska; 5 counties in Iowa. It took effect at Dec 1, 2018, 12:00 AM CST. It was in force for 39 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
Nov 29, 2018, 3:09 PM CST (21:09 UTC)
In effect from
Dec 1, 2018, 12:00 AM CST
Expired
Dec 2, 2018, 3:17 PM CST
In force
39 hr
Issued by
NWS Omaha, NE
All 21 counties

Harrison County, IA, Mills County, IA, Montgomery County, IA, Pottawattamie County, IA, Shelby County, IA, Antelope County, NE, Boone County, NE, Cass County, NE, Cedar County, NE, Colfax County, NE, Cuming County, NE, Douglas County, NE, Knox County, NE, Madison County, NE, Pierce County, NE, Platte County, NE, Sarpy County, NE, Stanton County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE

The radar

The Omaha radar (KOAX), 53 km from the middle of the area, began a volume at 21:11 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

Omaha, NE (KOAX), launched 12:00Z, 9.2 hours before the alert went out and 53 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 2018-11-29Temperature 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 2018-11-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -21 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
1094 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
-21 m²/s²
0-3 km storm-relative helicity
51 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

Nearby

Winter Storm Warnings in Nebraska, 2018Winter Storm Warnings in Iowa, 2018Every winter storm warning in 2018

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.