Alert archive / Nebraska / Tornado Warnings in 1996

Tornado Warning 45, NWS Omaha, NE

June 21, 1996Seward County, Nebraska

NWS Omaha, NE issued this tornado warning at Jun 21, 1996, 12:47 AM CDT for Seward 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
Jun 21, 1996, 12:47 AM CDT (05:47 UTC)
Expired
Jun 21, 1996, 1:30 AM CDT
In force
43 min
Issued by
NWS Omaha, NE
Area
Whole counties

County Seward County, NE

The radar

The Omaha radar (KOAX), 82 km from the middle of the area, began a volume at 05:49 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, 5.8 hours before the alert went out and 81 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 210549
TOROMA
NEC159-210630-
 
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
1247 AM CDT FRI JUN 21 1996
 
THE NATIONAL WEATHER SERVICE IN OMAHA/VALLEY HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  130 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN EAST CENTRAL NEBRASKA
 
   ...SEWARD COUNTY
 
AT 1245 AM CDT DOPPLER RADAR INDICATED A POSSIBLE TORNADO 5 MILES WEST
OF BEE...30 MILES NORTHWEST OF LINCOLN. THE STORM WAS MOVING
EAST/SOUTHEAST AT 20 MPH WITH BEE..GARLAND AND SEWARD IN ITS PATH.
 
THIS WARNING REPLACES THE SEVERE THUNDERSTORM WARNING FOR SEWARD COUNTY
THAT WAS TO EXPIRE AT 130 AM.  A SEVERE THUNDERSTORM WARNING CONTINUES
FOR EXTREME SOUTH*EAST BUTLER COUNTY UNTIL 130 AM.
 
PERSONS IN THE WARNED AREA SHOULD TAKE SHELTER IN A BASEMENT IF
AVAILABLE.  OTHERWISE GO TO A SMALL INTERIOR ROOM ON THE LOWEST
FLOOR.  CARS AND MOBILE HOMES SHOULD BE ABANDONED.
 
CHERMOK

What forecasters said that day

The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jun 20, 11:38 PM CDT, 1 hour 9 minutes before
NEZ066-065-210545-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
1137 PM CDT THU JUN 20 1996

AT 1135 PM CDT WEATHER RADAR SHOWED A STRONG OUTFLOW BOUNDARY PUSHING
SOUTHWARD THROUGH NORTHERN SEWARD AND NORTHERN LANCASTER COUNTIES OF
SOUTHEAST NEBRASKA. THIS OUTFLOW WAS BEING CAUSED BY SEVERE
THUNDERSTORMS TO THE NORTH OF LANCASTER AND SEWARD COUNTIES.

STRONG WINDS OF 40 TO 50 MPH ARE POSSIBLE WITH THE PASSAGE OF THIS
BOUNDARY WHICH SHOULD REACH LINCOLN BY MIDNIGHT.  RESIDENTS OF SEWARD
AND LANCASTER COUNTIES SHOULD BE ALERT TO THE POSSIBLE DEVELOPMENT OF
SEVERE WEATHER AND HEAVY RAINS LATER TONIGHT.

LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
BYRD

(
Special weather statement, Jun 21, 12:20 AM CDT, 27 minutes before
NEZ004-005-022-023-035-056>058-069-210620-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
1219 AM CDT (1119 PM MDT) FRI JUN 21 1996

...SEVERE THUNDERSTORM WATCH 650 CANCELLED FOR PORTIONS OF WESTERN
    NEBRASKA...

SEVERE THUNDERSTORM WATCH NUMBER 650 IS NO LONGER IN EFFECT FOR THE
FOLLOWING COUNTIES OF WESTERN NEBRASKA...

SHERIDAN...CHERRY...GARDEN...GRANT...DEUEL AND ARTHUR.

THE WATCH CONTINUE IN EFFECT UNTIL 1AM CDT/MFIDNIGHT FOR AREAS OF
SOUTHWEST NEBRAASKA INCLUDING KEITH...PERKINS AND CHASE COUNTIES.

GW

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, 7:39 PM CDTTornado WarningOAXWashington36 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, 12:52 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.