Alert archive / Nebraska / Tornado Warnings in 1991

Tornado Warning 7, NWS Cheyenne, WY

May 28, 1991Banner County, Nebraska

NWS Cheyenne, WY issued this tornado warning at May 28, 1991, 7:01 PM MDT for Banner County, Nebraska. It was in force for 29 min.

The area

The counties it named.

The facts

Issued
May 28, 1991, 7:01 PM MDT (01:01 UTC)
Expired
May 28, 1991, 7:30 PM MDT
In force
29 min
Issued by
NWS Cheyenne, WY
Area
Whole counties

County Banner County, NE

The nearest sounding before it

Denver, CO (KDEN), launched 00:00Z, 1.0 hours before the alert went out and 191 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, Denver, CO at 00:00Z on 1991-05-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 968 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 00:00Z on 1991-05-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 31 square meters per square second.1939587897117136Sfc1 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
968 J/kg
Mixed-layer CIN
-66 J/kg
Mixed-layer LCL
1264 m above ground
0-6 km bulk shear
79 kt
0-1 km storm-relative helicity
31 m²/s²
0-3 km storm-relative helicity
-84 m²/s²
Significant tornado parameter
0.6
Supercell composite
5.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KBFF 290101
TORBFF
NEC007-290130-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING 
NATIONAL WEATHER SERVICE SCOTTSBLUFF NE
701 PM MDT TUE MAY 28 1991

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 730 PM MDT FOR PEOPLE IN THE FOLLOWING COUNTY

   IN THE PANHANDLE OF NEBRASKA
      EASTERN BANNER

AT 659 PM MDT...RADAR INDICATED A TORNADO 18 MILES SOUTH OF
SCOTTSBLUFF NEBRASKA...JUST EAST OF HARRISBURG NEAR HIGHWAY 71.
THE STORM WAS MOVING EAST AT 15 MPH.

A SPOTTER 4 MILES NORTH OF HARRISBURG CONFIRMED A FUNNEL CLOUD
1 MILE SOUTH OF HIS HOME AT 647 PM MDT.

IF YOU ARE CAUGHT OUTSIDE...FIND SHELTER IN A NEARBY REINFORCED
BUILDING.  AS A LAST RESORT...TAKE SHELTER IN A CULVERT...DITCH OR
LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

LARGE HAIL...DANGEROUS LIGHTNING AND VERY HEAVY RAIN ARE LIKELY WITH
THIS STORM...IN ADDITION TO THE THREAT OF TORNADOES.

AFTER THE THREAT OF THE TORNADO PASSES...MOVE TO HIGHER GROUND TO
ESCAPE THE POSSIBILITY OF FLASH FLOODING.

TAKE COVER NOW.

PFEIFFER

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, May 28, 2:45 PM MDT, 4 hours 16 minutes before
WYZ012-015-016-017-282300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
245 PM MDT TUE MAY 28 1991

...SCATTERED THUNDERSTORMS ARE DEVELOPING ALONG THE LARAMIE AND SNOWY
MOUNTAIN RANGES IN SOUTHEAST WYOMING...

AT 240 PM MDT...RADAR AND SATELLITE PHOTOS SHOWED THUNDERSTORMS WERE
DEVELOPING ALONG THE LARAMIE AND SNOWY MOUNTAINS. THEY WERE MOVING TO
THE NORTHEAST AT 15 MILES AN HOUR.

NO SEVERE WEATHER WAS INDICATED BUT SOME OF THESE THUNDERSTORMS COULD
CONTAIN PEA TO MARBLE SIZED HAIL...WIND GUSTS TO 35 MILES AN HOUR AND
LOCALLY HEAVY RAIN. CONTINUED DEVELOPMENT IS EXPECTED THROUGH THE
BALANCE OF THE AFTERNOON.

WYOMING IS NOT UNDER THE DIRECT THREAT OF SEVERE WEATHER TODAY.
HOWEVER...A TORNADO WATCH IS IN EFFECT NEARBY FOR NORTHEAST COLORADO
AND THE NEBRASKA PANHANDLE UNTIL 9 PM MDT.
>
THIS MEANS THAT SOUTHEAST WYOMING COULD SEE A NUMBER OF STRONG
THUNDERSTORMS THROUGH THE AFTERNOON AND EVENING HOURS. KEEP AN
EYE ON THE SKY...AMD SEEK INDOOR SHELTER IF THUNDERSTORMS MOVE
INTO YOUR AREA.

CAS
Special weather statement, May 28, 3:18 PM MDT, 3 hours 43 minutes before
WYZ012-015-016-017-282230-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
315 PM MDT TUE MAY 28 1991

...THUNDERSTORMS CONTINUE TO GAIN STRENGTH OVER AND NEAR THE MOUNTAINS
OF SOUTHEAST WYOMING...

AT 305 PM THUNDERSTORMS HAD BECOME INTENSE OVER AND NEAR THE LARAMIE
AND SNOWY MOUNTAIN RANGES OF SOUTHEAST WYOMING. AT THAT TIME THE
STRONGEST STORMS WERE LOCATED 10 MILES SOUTHWEST OF CHUGWATER...OR 32
MILES SOUTHWEST OF WHEATLAND...AND 25 MILES SOUTHWEST OF WHEATLAND.

PEA SIZED HAIL WAS REPORTED AT 313 PM AT CHUGWATER.

ALL OF THESE INTENSE STORMS AS WELL AS THE OTHER THUNDERSTORMS OVER
SOUTHEAST AND SOUTH CENTRAL WYOMING WERE MOVING NORTH AT 15 MILES AN HOU
NORTH AT 15 MILES AN HOUR. THE STORMS WILL LIKELY AFFECT WHEATLAND
BETWEEN 400 PM AND 500 PM.
<
THE INTENSE STORMS WILL LIKELY PRODUCE SMALL HAIL...WIND GUSTS TO 45
MILES AN HOUR...DANGEROUS LIGHTNING AND HEAVY RAIN.

PEOPLE IN SOUTHEAST WYOMING...ESPECIALLY THOSE IN AND NEAR THE LARAMIE
AND SNOWY MOUNTAIN RANGES SHOULD BE ALERT TO THE POSSIBILITY OF
STRONG THUNDERSTORMS. DUE TO THE SLOW MOVEMENT OF THE STORMS AND THE
MOUNTAINOUS TERRAIN...FLASH FLOODING OF SMALL STREAMS AND CREEKS MAY
BE POSSIBLE. OF A STROM APPROACHES...MOVE INSIDE TO A SAFE SHELTER
RIGHT AWAY.
WEILAND
Special weather statement, May 28, 3:24 PM MDT, 3 hours 37 minutes before
WYZ012-015-016-017-282230-

SPECIAL WEATHER STATEMENT...CORRECTED
NATIONAL WEATHER SERVICE CHEYENNE WY
315 PM MDT TUE MAY 28 1991

...THUNDERSTORMS CONTINUE TO GAIN STRENGTH OVER AND NEAR THE MOUNTAINS
OF SOUTHEAST WYOMING...

AT 305 PM THUNDERSTORMS HAD BECOME INTENSE OVER AND NEAR THE LARAMIE
AND SNOWY MOUNTAIN RANGES OF SOUTHEAST WYOMING. AT THAT TIME THE
STRONGEST STORMS WERE LOCATED 10 MILES SOUTHWEST OF CHUGWATER...OR 32
MILES SOUTHWEST OF WHEATLAND...AND 25 MILES SOUTHWEST OF WHEATLAND.

PEA SIZED HAIL WAS REPORTED AT 313 PM AT CHUGWATER.

ALL OF THESE INTENSE STORMS AS WELL AS THE OTHER THUNDERSTORMS OVER
SOUTHEAST AND SOUTH CENTRAL WYOMING WERE MOVING NORTH AT 15 MILES AN
HOUR. THE STORMS WILL LIKELY AFFECT WHEATLAND BETWEEN 400 PM AND 500
PM.
<
THE INTENSE STORMS WILL LIKELY PRODUCE SMALL HAIL...WIND GUSTS TO 45
MILES AN HOUR...DANGEROUS LIGHTNING AND HEAVY RAIN.

PEOPLE IN SOUTHEAST WYOMING...ESPECIALLY THOSE IN AND NEAR THE LARAMIE
AND SNOWY MOUNTAIN RANGES SHOULD BE ALERT TO THE POSSIBILITY OF
STRONG THUNDERSTORMS. DUE TO THE SLOW MOVEMENT OF THE STORMS AND THE
MOUNTAINOUS TERRAIN...FLASH FLOODING OF SMALL STREAMS AND CREEKS MAY
BE POSSIBLE. IF A STORM APPROACHES...MOVE INSIDE TO A SAFE SHELTER
RIGHT AWAY.

CORRECTED FOR SPELLING ERRORS.

WEILAND
Special weather statement, May 28, 4:13 PM MDT, 2 hours 48 minutes before
WYZ012-015-016-017-282330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
410 PM MDT TUE MAY 28 1991

...THUNDERSTORMS CONTINUE OVER SOUTHEAST WYOMING...

AT 400 PM THUNDERSTORMS CONTINUED OVER EXTREME SOUTHERN WYOMING AS WELL
AS THE EAST THIRD OF THE STATE. IN THE SOUTHEAST...AN INTENSE STORM AT
THAT TIME WAS LOCATED 5 MILES EAST OF CHUGWATER...OR 40 MILES SOUTH OF
WHEATLAND. PEA SIZED HAIL HAD BEEN REPORTED AT BOTH CHUGWATER AND THE
EAST SIDE OF CHEYENNE BETWEEN 300 PM AND 400 PM.

ALL OF THE STORMS WERE MOVING TO THE NORTHEAST AT 15 MILES AN HOUR.
THUNDERSTORMS...ESPECIALLY IN EASTERN WYOMING WILL CONTINUE THROUGH
THE EVEVNING HOURS. SOME OF THE STORMS WILL BE INTENSE AND PRODUCE
SMALL HAIL...WIND GUSTS TO 45 MILES AN HOUR...DANGEROUS LIGHTNING AND
HEAVY RAIN. THE INTENSE STORM WILL MOVE THROUGH HAWK SPRINGS BY 430 PM.

PEOPLE IN EXTREME SOUTHERN WYOMING AS WELL AS THE EAST THIRD OF THE
STATE SHOULD BE PREPAJRED FOR STRONG THUNDERSTORMS IN THE AREA. DUE TO
THE SLOW MOVEMENT OF THE STORMS...SMALL STREAMS AND CREEKS MAY RISE.
IF A STORM APPROACHES...MOVE TO A SAFE SHELTER RIGHT AWAY.
WEILAND
Special weather statement, May 28, 4:47 PM MDT, 2 hours 14 minutes before
WYZ012-017-290030-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
445 PM MDT TUE MAY 28 1991

...THUNDERSTORMS DEVELOP NEAR CHEYENNE IN SOUTHEAST WYOMING...

AT 440 PM THUNDERSTORMS CONTINUED TO DEVELOP 8 MILES EAST OF CHEYENNE
IN THE SOUTHERN PORTION OF LARAMIE COUNTY. A SEVERE THUNDERSTORM
WAS LOCATED 10 MILES SOUTH OF CHEYENNE ABOUT THE SAME TIME AND MOVING
NORTH. AND NORTHEAST.

THE SEVERE STORM TO THE SOUTH OF CHEYENE WyILL BE INTO LARAMIE COUNTY
BEFORE 5 PM AND PEOPLE IN SOUTHERN AND EASTERN LARAMIE COUNTY SHOULD
BE ALERT TO THE THREAT OF HEAVY RAIN...HAIL AND GUSTY WINDS.

SGS
Special weather statement, May 28, 5:18 PM MDT, 1 hour 43 minutes before
NEZ001-005-011-290000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SCOTTSBLUFF NE
515 PM MDT TUE MAY 28 1991

...TORNADO WATCH SOUTHERN PANHANDLE UNTIL 9 PM MDT...

AT 512 PM MDT...RADAR INDICATED STRONG THUNDERSTORMS JUST ACROSS THE
NEBRASKA PANHANDLE BORDER IN EASTERN WYOMING.  THE STRONGEST STORMS WERE
LOCATED FROM 25 MILES WEST OF SCOTTSBLUFF TO 30 MILES SOUTHWEST OF
SCOTTSBLUFF NEBRASKA.  THE STORMS WERE MOVING TO THE NORTHEAST AT 25 MPH
AND WILL MOVE INTO SOUTHERN SIOUX...SCOTTS BLUFF...AND NORTHERN BANNER
COUNTIES OF THE NEBRASKA PANHANDLE.

HEAVY RAIN...SMALL HAIL...STRONG GUSTY WIND AND DEADLY LIGHTNING
ARE POSSIBLE WITH THESE STORMS AS THEY MOVE INTO SOUTHERN SIOUX...
SCOHTTS BLUFF...AND NORTHERN BANNER COUNTIES UNTIL 600 PM MDT.
EMANUEL

The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 28, 6:07 PM MDTSevere Thunderstorm WarningCYSBanner38 min
May 28, 6:32 PM MDTTornado WarningCYSBanner28 min
May 28, 7:32 PM MDTSevere Thunderstorm WarningCYSMorrill28 min

Nearby

Tornado Warnings in Nebraska, 1991Every tornado warning in 1991Tornadoes in 1991

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.