Alert archive / Nebraska / Tornado Warnings in 1996

Tornado Warning 31, NWS Omaha, NE

June 20, 1996Washington County, Nebraska

NWS Omaha, NE issued this tornado warning at Jun 20, 1996, 7:39 PM CDT for Washington County, Nebraska. It was in force for 36 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
Jun 20, 1996, 7:39 PM CDT (00:39 UTC)
Expired
Jun 20, 1996, 8:15 PM CDT
In force
36 min
Issued by
NWS Omaha, NE
Area
Whole counties

County Washington County, NE

The radar

The Omaha radar (KOAX), 26 km from the middle of the area, began a volume at 00:38 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, 0.7 hours before the alert went out and 27 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 1996-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2363 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 1996-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 112 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
2363 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
1424 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
112 m²/s²
0-3 km storm-relative helicity
276 m²/s²
Significant tornado parameter
2.1
Supercell composite
19.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KOMA 210041 RRA
TOROMA
NEC177-210115-
 
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
739 PM CDT THU JUN 20 1996
 
THE NATIONAL WEATHER SERVICE IN OMAHA/VALLEY HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  815 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN EAST CENTRAL NEBRASKA
 
   ...WASHINGTON COUNTY
 
AT 738 PM CDT RADAR INDICATED A TORNADO MOVING INTO THE NORTHWEST
CORNER OF WASHINGTON COUNTY...NEAR WINSLOW AND NICKERSON. THE
STORM IS MOVING EAST AT 25 MPH TOWARD BLAIR...ALONG HIGHWAY 91.
 
THIS REPLACES THE SEVERE THUNDERSTORM WARNING FOR WASHINGTON
COUNTY.
 
PEOPLE IN THE WARNED AREA SHOULD MOVE TO A REINFORCED BUILDING ON
THE LOWEST FLOOR TO BE PREPARED FOR THE DESTRUCTIVE WINDS THAT
ACCOMPANY TORNADOES.  IN ADDITION TO THE THREAT OF TORNADOES...
LARGE HAIL...DANGEROUS LIGHTNING AND VERY HEAVY RAIN ARE LIKELY
WITH THIS STORM.
 
MILLER

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 20, 7:01 PM CDTSevere Thunderstorm WarningOAXCuming, Stanton59 min
Jun 20, 7:10 PM CDTTornado WarningOAXBurt35 min
Jun 20, 7:20 PM CDTSevere Thunderstorm WarningOAXWashington55 min
Jun 20, 7:30 PM CDTSevere Thunderstorm WarningOAXDodge30 min
Jun 20, 7:56 PM CDTSevere Thunderstorm WarningOAXCuming, Dodge64 min
Jun 20, 8:16 PM CDTSevere Thunderstorm WarningOAXWashington59 min
Jun 20, 8:27 PM CDTTornado WarningOAXDodge48 min
Jun 20, 8:58 PM CDTTornado WarningOAXWashington47 min
Jun 20, 9:00 PM CDTFlash Flood WarningOAXColfax, Cuming, Dodge5 hr
Jun 20, 9:14 PM CDTTornado WarningOAXDodge31 min
Jun 20, 9:26 PM CDTTornado WarningOAXColfax, Platte49 min
Jun 20, 9:43 PM CDTTornado WarningOAXWashington47 min
Jun 20, 9:46 PM CDTTornado WarningOAXSaunders44 min
Jun 20, 9:55 PM CDTTornado WarningOAXDodge35 min
Jun 20, 10:03 PM CDTTornado WarningOAXDouglas57 min
Jun 20, 10:09 PM CDTSevere Thunderstorm WarningOAXButler, Colfax66 min
Jun 20, 10:20 PM CDTTornado WarningOAXButler, Saunders55 min
Jun 20, 10:26 PM CDTTornado WarningOAXWashington49 min
Jun 20, 10:55 PM CDTTornado WarningOAXDouglas50 min
Jun 20, 11:09 PM CDTTornado WarningOAXButler, Saunders66 min
Jun 20, 11:20 PM CDTFlash Flood WarningOAXButler, Saunders6 hr
Jun 20, 11:49 PM CDTSevere Thunderstorm WarningOAXCass, Sarpy56 min
Jun 20, 11:49 PM CDTSevere Thunderstorm WarningOAXLancaster56 min
Jun 21, 12:26 AM CDTSevere Thunderstorm WarningOAXButler, Seward64 min
Jun 21, 12:47 AM CDTTornado WarningOAXSeward43 min
Jun 21, 12:52 AM CDTTornado WarningOAXCass68 min
Jun 21, 12:57 AM CDTTornado WarningOAXCass63 min
Jun 21, 1:59 AM CDTSevere Thunderstorm WarningOAXDodge, Washington46 min
Jun 21, 2:00 AM CDTSevere Thunderstorm WarningOAXBurt, Cuming45 min
Jun 21, 3:51 AM CDTSevere Thunderstorm WarningOAXColfax, Platte54 min

Nearby

Tornado Warnings in Nebraska, 1996Every tornado warning in 1996Tornadoes in 1996

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.