Alert archive / Nebraska / Wind Chill Advisories in 2019

Wind Chill Advisory 7, NWS Omaha, NE

March 2, 201911 counties in Nebraska; Harrison County, Pottawattamie County, Shelby County, Iowa

NWS Omaha, NE issued this wind chill advisory at Mar 2, 2019, 3:38 PM CST for 11 counties in Nebraska; Harrison County, Pottawattamie County, Shelby County, Iowa. It took effect at Mar 3, 2019, 9:00 PM CST. It was in force for 15 hr.

The area

The counties it named.

The facts

Issued
Mar 2, 2019, 3:38 PM CST (21:38 UTC)
In effect from
Mar 3, 2019, 9:00 PM CST
Expired
Mar 4, 2019, 12:00 PM CST
In force
15 hr
Issued by
NWS Omaha, NE

Counties Harrison County, IA, Pottawattamie County, IA, Shelby County, IA, Butler County, NE, Colfax County, NE, Dodge County, NE, Douglas County, NE, Jefferson County, NE, Lancaster County, NE, Platte County, NE, Saline County, NE, Saunders County, NE, Seward County, NE, Washington County, NE

The radar

The Omaha radar (KOAX), 21 km from the middle of the area, began a volume at 21:43 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, 9.6 hours before the alert went out and 336 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, N. Platte/Lee Bi, NE at 12:00Z on 2019-03-02Temperature 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, N. Platte/Lee Bi, NE at 12:00Z on 2019-03-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 107 square meters per square second.1939587897117136Sfc1 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
630 m above ground
0-6 km bulk shear
74 kt
0-1 km storm-relative helicity
107 m²/s²
0-3 km storm-relative helicity
329 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
Mar 2, 3:22 AM CSTWind Chill AdvisoryOAXAntelope, Boone, Burt, Butler, Cass, Cedar and 24 more57 hr

Nearby

Wind Chill Advisories in Nebraska, 2019Wind Chill Advisories in Iowa, 2019Every wind chill advisory 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.