Alert archive / Nebraska / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 227, NWS Omaha, NE

October 30, 2013Cass County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Oct 30, 2013, 9:00 AM CDT for Cass County, Nebraska. It was in force for 15 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 30, 2013, 9:00 AM CDT (14:00 UTC)
Expired
Oct 30, 2013, 9:15 AM CDT
In force
15 min
Issued by
NWS Omaha, NE
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

County Cass County, NE

The radar

The Omaha radar (KOAX), 49 km from the middle of the area, began a volume at 14:00 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

Topeka, KS (KFOE), launched 12:00Z, 2.0 hours before the alert went out and 217 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, Topeka, KS at 12:00Z on 2013-10-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 648 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, Topeka, KS at 12:00Z on 2013-10-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 283 square meters per square second.1939587897Sfc1 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
648 J/kg
Mixed-layer CIN
-113 J/kg
Mixed-layer LCL
511 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
283 m²/s²
0-3 km storm-relative helicity
307 m²/s²
Significant tornado parameter
0.0
Supercell composite
7.8

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 30, 6:29 AM CDTSevere Thunderstorm WarningOAXButler, Colfax, Platte31 min
Oct 30, 6:47 AM CDTSpecial Weather StatementOAXColfax28 min
Oct 30, 7:16 AM CDTSpecial Weather StatementOAXWashington29 min
Oct 30, 7:30 AM CDTSpecial Weather StatementOAXWashington30 min
Oct 30, 8:23 AM CDTSpecial Weather StatementOAXCass, Lancaster37 min
Oct 30, 8:31 AM CDTSevere Thunderstorm WarningOAXCass, Lancaster, Sarpy29 min
Oct 30, 8:33 AM CDTSpecial Weather StatementOAXOtoe27 min
Oct 30, 8:37 AM CDTSevere Thunderstorm WarningOAXGage, Johnson, Lancaster, Otoe23 min
Oct 30, 8:38 AM CDTSevere Thunderstorm WarningOAXGage, Johnson, Pawnee37 min
Oct 30, 9:13 AM CDTSevere Thunderstorm WarningOAXCass, Sarpy32 min
Oct 30, 3:08 PM CDTSpecial Weather StatementOAXNemaha, Richardson52 min
Oct 30, 3:30 PM CDTSevere Thunderstorm WarningOAXPawnee, Richardson30 min
Oct 30, 7:51 AM CDTSpecial Weather StatementOAXHarrison24 min
Oct 30, 8:51 AM CDTSpecial Weather StatementOAXFremont24 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2013Every severe thunderstorm warning in 2013

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.