Alert archive / Nebraska / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 64, NWS Omaha, NE

May 6, 2023Jefferson County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at May 6, 2023, 9:02 PM CDT for Jefferson County, Nebraska. It was in force for 43 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
May 6, 2023, 9:02 PM CDT (02:02 UTC)
Expired
May 6, 2023, 9:45 PM CDT
In force
43 min
Issued by
NWS Omaha, NE
Area
Storm-based polygon
Damage threat
Considerable
Hail
2.0 in
Wind
60.0 mph

County Jefferson County, NE

The radar

The Grand Island radar (KUEX), 111 km from the middle of the area, began a volume at 02:02 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, 2.0 hours before the alert went out and 143 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 2023-05-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 280 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 00:00Z on 2023-05-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -13 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
280 J/kg
Mixed-layer CIN
-164 J/kg
Mixed-layer LCL
1499 m above ground
0-6 km bulk shear
65 kt
0-1 km storm-relative helicity
-13 m²/s²
0-3 km storm-relative helicity
74 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.8

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
May 6, 9:19 PM CDTSevere Thunderstorm WarningOAXJefferson, Saline41 min
May 6, 10:06 PM CDTSpecial Weather StatementOAXGage24 min
May 6, 10:14 PM CDTSevere Thunderstorm WarningOAXGage, Johnson, Pawnee46 min
May 6, 10:52 PM CDTDense Fog AdvisoryOAXBurt, Cass, Dodge, Douglas, Otoe, Sarpy and 2 more9 hr
May 7, 3:51 AM CDTSevere Thunderstorm WarningOAXAntelope, Boone, Madison, Pierce39 min
May 7, 4:29 AM CDTSevere Thunderstorm WarningOAXAntelope, Boone, Madison, Pierce30 min
May 7, 4:52 AM CDTSpecial Weather StatementOAXStanton23 min
May 7, 4:59 AM CDTSevere Thunderstorm WarningOAXAntelope, Boone20 min
May 7, 5:58 AM CDTSevere Thunderstorm WarningOAXAntelope, Boone32 min
May 7, 6:46 PM CDTSevere Thunderstorm WarningOAXJefferson, Saline44 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2023Every severe thunderstorm warning in 2023

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.