Alert archive / Nebraska / Tornado Warnings in 1993

Tornado Warning 23, NWS Omaha, NE

September 21, 1993Jefferson County, Nebraska

NWS Omaha, NE issued this tornado warning at Sep 21, 1993, 8:42 PM CDT for Jefferson County, Nebraska. It was in force for 33 min.

The area

The counties it named.

The facts

Issued
Sep 21, 1993, 8:42 PM CDT (01:42 UTC)
Expired
Sep 21, 1993, 9:15 PM CDT
In force
33 min
Issued by
NWS Omaha, NE
Area
Whole counties

County Jefferson County, NE

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 1.7 hours before the alert went out and 184 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 00:00Z on 1993-09-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1569 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 00:00Z on 1993-09-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 260 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
1569 J/kg
Mixed-layer CIN
-150 J/kg
Mixed-layer LCL
983 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
260 m²/s²
0-3 km storm-relative helicity
506 m²/s²
Significant tornado parameter
0.0
Supercell composite
30.6

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 21, 8:22 PM CDTSevere Thunderstorm WarningOAXJefferson38 min
Sep 21, 9:15 PM CDTSevere Thunderstorm WarningOAXJohnson20 min
Sep 21, 10:23 PM CDTSevere Thunderstorm WarningOAXJohnson37 min
Sep 21, 11:20 PM CDTSevere Thunderstorm WarningOAXSaunders25 min
Sep 21, 11:28 PM CDTSevere Thunderstorm WarningOAXButler21 min
Sep 21, 10:45 PM CDTSevere Thunderstorm WarningOAXPage30 min

Nearby

Tornado Warnings in Nebraska, 1993Every tornado warning in 1993Tornadoes in 1993

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.