Alert archive / Nebraska / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 191, NWS Omaha, NE

October 11, 2020Cuming County, Thurston County, Wayne County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Oct 11, 2020, 6:35 PM CDT for Cuming County, Thurston County, Wayne County, Nebraska. It was in force for 25 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Oct 11, 2020, 6:35 PM CDT (23:35 UTC)
Expired
Oct 11, 2020, 7:00 PM CDT
In force
25 min
Issued by
NWS Omaha, NE
Area
Storm-based polygon
Tornado
Possible
Hail
1.0 in
Wind
65.0 mph

Counties Cuming County, NE, Thurston County, NE, Wayne County, NE

The radar

The Omaha radar (KOAX), 94 km from the middle of the area, began a volume at 23:35 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Oct 11, 4:54 PM CDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 11.6 hours before the alert went out and 94 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 2020-10-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 105 joules per kilogram.LCLLFCEL10008507005003002001001 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 2020-10-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -42 square meters per square second.193958Sfc1 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
105 J/kg
Mixed-layer CIN
-529 J/kg
Mixed-layer LCL
1247 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
-42 m²/s²
0-3 km storm-relative helicity
50 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 11, 3:05 PM CDTWind AdvisoryOAXBurt, Butler, Colfax, Cuming, Dodge, Douglas and 6 more3 hr
Oct 11, 3:05 PM CDTWind AdvisoryOAXAntelope, Boone, Burt, Butler, Cass, Cedar and 24 more10 hr
Oct 11, 5:22 PM CDTSevere Thunderstorm WarningOAXMadison, Stanton23 min
Oct 11, 5:40 PM CDTSevere Thunderstorm WarningOAXMadison, Stanton, Wayne35 min
Oct 11, 5:57 PM CDTSevere Thunderstorm WarningOAXColfax, Madison, Platte, Stanton33 min
Oct 11, 6:09 PM CDTSevere Thunderstorm WarningOAXCuming, Stanton, Wayne36 min
Oct 11, 6:31 PM CDTSevere Thunderstorm WarningOAXColfax, Cuming, Platte, Stanton29 min
Oct 11, 6:55 PM CDTSevere Thunderstorm WarningOAXCuming, Thurston35 min
Oct 11, 6:59 PM CDTSevere Thunderstorm WarningOAXColfax, Cuming, Platte, Stanton31 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2020Every severe thunderstorm warning in 2020

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.