Alert archive / Nebraska / Wind Advisories in 2019

Wind Advisory 11, NWS Omaha, NE

October 21, 201927 counties in Nebraska; 8 counties in Iowa

NWS Omaha, NE issued this wind advisory at Oct 21, 2019, 3:42 AM CDT for 27 counties in Nebraska; 8 counties in Iowa. It took effect at Oct 21, 2019, 1:00 PM CDT. It was in force for 21 hr.

The area

The counties it named.

The facts

Issued
Oct 21, 2019, 3:42 AM CDT (08:42 UTC)
In effect from
Oct 21, 2019, 1:00 PM CDT
Expired
Oct 22, 2019, 10:02 AM CDT
In force
21 hr
Issued by
NWS Omaha, NE
All 35 counties

Fremont County, IA, Harrison County, IA, Mills County, IA, Monona County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Shelby County, IA, Antelope County, NE, Boone County, NE, Burt County, NE, Butler County, NE, Cass County, NE, Cedar County, NE, Colfax County, NE, Cuming County, NE, Dodge County, NE, Douglas County, NE, Gage County, NE, Jefferson County, NE, Johnson County, NE, Knox County, NE, Lancaster County, NE, Madison County, NE, Otoe County, NE, Pierce County, NE, Platte County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Stanton County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE

The radar

The Omaha radar (KOAX), 23 km from the middle of the area, began a volume at 08:43 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

Omaha, NE (KOAX), launched 00:00Z, 8.7 hours before the alert went out and 23 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 00:00Z on 2019-10-21Temperature 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 00:00Z on 2019-10-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 252 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
1600 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
252 m²/s²
0-3 km storm-relative helicity
390 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
Oct 20, 8:04 PM CDTSpecial Weather StatementOAXJohnson26 min
Oct 20, 8:17 PM CDTSevere Thunderstorm WarningOAXCass, Johnson, Otoe28 min
Oct 20, 8:39 PM CDTSpecial Weather StatementOAXCass, Sarpy36 min
Oct 20, 9:11 PM CDTSpecial Weather StatementOAXNemaha34 min
Oct 21, 1:23 PM CDTSpecial Weather StatementOAXWashington52 min

Nearby

Wind Advisories in Nebraska, 2019Wind Advisories in Iowa, 2019Every wind 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.