Alert archive / Nebraska / Tornado Warnings in 1991

Tornado Warning 31, NWS Cheyenne, WY

June 22, 1991Cheyenne County, Morrill County, Nebraska

NWS Cheyenne, WY issued this tornado warning at Jun 22, 1991, 5:57 PM MDT for Cheyenne County, Morrill County, Nebraska. It was in force for 28 min.

The area

The counties it named.

The facts

Issued
Jun 22, 1991, 5:57 PM MDT (23:57 UTC)
Expired
Jun 22, 1991, 6:25 PM MDT
In force
28 min
Issued by
NWS Cheyenne, WY
Area
Whole counties

Counties Cheyenne County, NE, Morrill County, NE

The nearest sounding before it

Denver, CO (KDEN), launched 12:00Z, 12.0 hours before the alert went out and 179 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 12:00Z on 1991-06-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 299 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 12:00Z on 1991-06-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 161 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
299 J/kg
Mixed-layer CIN
-102 J/kg
Mixed-layer LCL
841 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
161 m²/s²
0-3 km storm-relative helicity
217 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KBFF 222357
TORBFF
NEC123-033-230030-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING 
NATIONAL WEATHER SERVICE SCOTTSBLUFF NE
557 PM MDT SAT JUN 22 1991

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 630 PM MDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE PANHANDLE OF NEBRASKA
      SOUTHERN MORRILL...NORTHERN CHEYENNE

AT 553 PM MDT A TORNADO WAS INDICATED BY RADAR 15 MILES NORTH OF
SIDNEY IN NORTHERN CHEYENNE AND SOUTHERN MORRILL COUNTIES OF THE
PANHANDLE.  THE STORM WAS MOVING NORTHEAST AT 25 MPH.

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.

GIVE REPORTS OF SEVERE WEATHER OR DAMAGE TO A LAW ENFORCEMENT AGENCY
FOR RELAY TO THE NATIONAL WEATHER SERVICE.

TAKE COVER NOW.


TORNADO WATCH NUMBER 583 IS IN EFFECT FOR THE ENTIRE PANHANDLE UNTIL
E11 PM MDT.

KYLE

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 22, 1:43 PM MDT, 4 hours 14 minutes before
WYZ016-017-222100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
142 PM MDT SAT JUN 22 1991

...A TORNADO WATCH HAS BEEN ISSUED FOR A LARGE PART OF EASTERN
WYOMING UNTIL 8PM TONIGHT...

THUNDERSTORMS HAVE BEGUN TO DEVELOP OVER A PART OF SOUTHEAST
WYOMING.  SHORTLY AFTER 130PM THIS AFTERNOON WEATHER RADAR INDICATED
THAT THE STRONGEST STORMS WERE MOVING INTO THE SOUTHEAST CORNER OF
WYOMING FROM NORTHERN COLORADO.  AT THAT TIME THEY WERE 15 TO 20 MILES
SOUTHWEST OF CHEYENNE...MOVING NORTHEAST AROUND 20 MILES AN HOUR.

OTHER THUNDERSTORMS WERE INTENSIFYING OVER CENTRAL AND NORTHERN
ALBANY COUNTY.  THE STRONGEST WERE JUST NORTH OF THE TOWN OF GARRETT
...WHICH IS 33 MILES WEST OF WHEATLAND.

A TORNADO WATCH REMAINS IN EFFECT FOR A LARGE PART OF EASTERN WYOMING
UNTIL 8PM THIS EVENING.  PERSONS IN THIS AREA SHOULD KEEP ABREAST OF
THE LATEST WEATHER DEVELOPEMENTS.  BE PREPARED TO SEEK SHELFTER IF
THREATENING WEATHER APPROACHES.

CGB
Special weather statement, Jun 22, 3:47 PM MDT, 2 hours 10 minutes before
WYZ017-222245-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
345 PM MDT SAT JUN 22 1991

...A BAND OF STRONG THUNDERSTORMS CONTINUING THROUGH EASTERN LARAMIE
COUNTY...

AT 340PM CHEYENNE RADAR SHOWED A BAND OF STRONG THUNDERSTORMS IN
EASTERN LARAMIE COUNTY OF SOUTHEAST WYOMING.  THE BAND EXTENDED FROM
25 MILES NORTHEAST OF CHEYENNE TO 15 MILES SOUTHEAST OF CHEYENNE AND
WAS APPROACHING THE TOWNS OF BURNS AND CARPENTER.

THE THUNDERSTORMS WERE MOVING TO THE NORTHEAST AT 20 MILES AN HOUR.

BRIEF HEAVY RAIN...STRONG WINDS AND SMALL HAIL SHOULD BE EXPECTED WITH
THESE THUNDERSTORMS.  THE STORMS WILL BE MONITORED CLOSELY FOR POSSIBLE
INTENSIFICATION.

A TORNADO WATCH REMAINS VIN EFFECT FOR A LARGE PART OF EASTERN WYOMING
UNTIL 800PM THIS EVENING.  PEOPLE IN EASTERN WYOMING SHOULD KEEP
ABREAST OF THE LATEST WEATHER DEVELOPMENTS.  BE PREPARED TO SEEK
SHELTER IF THREATENING WEATHER APPROACHES.
COX
Special weather statement, Jun 22, 3:50 PM MDT, 2 hours 7 minutes before
NEZ001-005-011-222315-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SCOTTSBLUFF NE
350 PM MDT SAT JUN 22 1991

...THUNDERSTORMS EXPECTED IN NEBRASKA PANHANDLE...

AT 348 PM MDT...NUMEROUS SHOWERS AND THUNDERSTORMS WERE IN EASTERN
WYOMING APPROACHING THE NEBRASKA/WYOMING STATELINE.  THE STORMS WERE
LOCATED FROM EAST OF GREELEY COLORADO...TO JUST EAST OF CHEYENNE...AND
NORTH TO LUSK WYOMING.  THE STORMS WERE MOVING NORTHEAST AT 20 MPH.

THE STORMS WILL BE ENTERING WESTERN BANNER COUNTY BY 4PM MDT...KIMBALL
COUNTY BY 430 PM MDT...NORTHWESTERN SIOUX COUNTY BY 430 PM MDT...AND
SOUTHWESTERN SCOTTS BLUFF COUNTY BY 430 PM MDT.

HEAVY RAIN...STRONG GUSTY WINDS...AND SMALL HAIL ARE POSSIBLE WgITH THESE
STORMS IN THE WESTERN PANHANDLE UNTIL 515 PM MDT.
PFEIFFER
Special weather statement, Jun 22, 4:42 PM MDT, 1 hour 15 minutes before
WYZ017-222315-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
440 PM MDT SAT JUN 22 1991

...THE LINE OF STORMS WAS MOVING EAST OUT OF SOUTHEAST WYOMING AT 440
PM...

RADAR AT 440 PM SHOWED THAT THE LINE OF THUNDERSTORMS HAD MOVED EAST
INTO THE NEBRASKA PANHANDLE.  OUTSIDE OF SOME BRIEF HEAVY RAIN AND
SMALL HAIL...NO SEVERE WEATHER WAS REPORTED IN EASTERN LARAMIE COUNTY
AS THE LINE OF STORMS WENT THROUGH.

A TORNADO WATCH REMAINS IN EFFECT FOR A LARGE PART OF EASTERN WYOMING
UNTIL 8 PM.  HOWEVER...CURRENT RADAR AND SURFACE WEATHER REPORTS
INDICATE THAT THE THREAT OF STRONG STORMS HAS DIMINISHED...AND HENCE
PARTS OF THE WATCH AREA MAY BE CANCELLED SHORTLY.

JAD
Special weather statement, Jun 22, 5:06 PM MDT, 51 minutes before
NEZ001-005-011-230000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SCOTTSBLUFF NE
505 PM MDT SAT JUN 22 1991

...TORNADO WATCH EFFECTIVE UNTIL 11 PM MDT...
...STRONG THUNDERSTORMS IN WESTERN NEBRASKA PANHANDLE...

AT 502 PM MDT...RADAR INDICATED A LINE OF THUNDERSTORMS OVER SCOTTS
BLUFF...BANNER AND KIMBALL COUNTIES IN THE PANHANDLE.  THE LINE OF
STORMS WAS FROM 12 MILES NORTH OF SCOTTSBLUFF TO 40 MILES SOUTHWEST OF
SIDNEY...NEAR FORT MORGAN IN COLORADO.  THE STORMS WERE MOVING NORTHEAST
AT 25 MPH.

BRIEF HEAVY RAIN...STRONG GUSTY WINDS...HAIL AND DANGEROUS LIGHTNING ARE
POSSIBLE WITH THIS LINE OF STORMS OVER SIOUX...BOX BUTTE...SCOTTS BLUFF
...MORRILL...BANNER...KIMBALL AND CHEYENNE COUNTIES OF THE PANHANDLE
UNTIL 6 PM MDT.

TORNADO WATCH NUMBER 583 IS IN EFFECT FOR THE PANHANDLE UNTIL 11 PM MDT.
KYLE
Special weather statement, Jun 22, 5:42 PM MDT, 15 minutes before
WYZ015-016-017-230015-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
540 PM MDT SAT JUN 22 1991

...THE TORNADO WATCH HAS BEEN CANCELLED FOR LARAMIE...ALBANY AND FAR
EASTERN CARBON COUNTIES OF SOUTHEAST WYOMING AS OF 530 PM...

ALMOST ALL THE THUNDERSTORMS HAVE MOVED OUT OF SOUTHEAST WYOMING AT 530
PM...AND SO THE TORNADO WATCH HAS BEEN CANCELLED FOR THE COUNTIES OF
LARAMIE...ALBANY AND FAR EASTERN CARBON.

A TORNADO WATCH STILL CONTINUES UNTIL 8 PM FOR MUCH OF NORTHEAST AND
EAST CENTRAL WYOMING HOWEVER...INCLUDING PLATTE AND GOSHEN COUNTIES.
A FEW SMALL THUNDERSTORMS WERE MOVING THROUGH PLATTE COUNTY AT 530 PM
...WITH ANOTHER STRONGER STORM OVER THE LARAMIE RANGE SOUTH OF DOUGLAS.
THESE STORMS WERE MOVING EAST AT ABOUT 30 MILES AN HOUR.

JAD

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.