Alert archive / Nebraska / Tornado Warnings in 1991

Tornado Warning 22, NWS Cheyenne, WY

June 9, 1991Morrill County, Nebraska

NWS Cheyenne, WY issued this tornado warning at Jun 9, 1991, 4:39 PM MDT for Morrill County, Nebraska. It was in force for 36 min.

The area

The counties it named.

The facts

Issued: Jun 9, 1991, 4:39 PM MDT (22:39 UTC)
Expired: Jun 9, 1991, 5:15 PM MDT
In force: 36 min
Issued by: NWS Cheyenne, WY
Area: Whole counties

County Morrill County, NE

The nearest sounding before it

Denver, CO (KDEN), launched 12:00Z, 10.7 hours before the alert went out and 206 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2 J/kg
Mixed-layer CIN: -512 J/kg
Mixed-layer LCL: 2648 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 71 m²/s²
0-3 km storm-relative helicity: 63 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KBFF 092241 COR
TORBFF
NEC123-092315-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SCOTTSBLUFF NE
439 PM MDT SUN JUN 9 1991

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING
EFFECTIVE UNTIL 515 PM MDT FOR PEOPLE IN THE FOLLOWING COUNTY

   IN THE PANHANDLE OF NEBRASKA
      NORTHERN MORRILL

AT 436 PM MDT...A FUNNEL CLOUD WAS IN SIGHT 20 MILES NORTHEAST OF
SCOTTSBLUFF...NORTHEAST OF BAYARD NEBRASKA AND SOUTHWEST OF ANGORA.
THE STORM WAS MOVING EAST AT 20 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.
LARGE HAIL...DANGEROUS LIGHTNING AND VERY HEAVY RAIN ARE LIKELY WITH
THIS STORM...IN ADDITION TO THE THREAT OF TORNADOES.

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, Jun 9, 2:00 PM MDT, 2 hours 39 minutes before

WYZ013-014-015-016-017-092200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
155 PM MDT SUN JUN 9 1991

...THUNDERSTORMS WERE DEVELOPING OVER EXTREME SOUTHERN WYOMING...

AT 140 PM THUNDERSTORMS WERE DEVELOPING OVER THE EXTREME SOUTH PART OF
WYOMING. AT THAT TIME THE STRONGEST STORMS WERE LOCATED JUST WEST OF
THE FLAMING GORGE RESERVOIR...45 MILES SOUTHWEST OF ROCK SPRINGS AND
ABOUT 20 MILES SOUTH OF LARAMIE...NEAR TIE SIDING.

ALL OF THE THUNDERSTORMS WERE MOVING TO THE NORTHEAST AT 25 MILES AN
HOUR. STORMS WILL CONTINUE TO DEVELOP AND SPREAD OVER MUCH OF THE
SOUTHEAST HALF OF WYOMING THROUGH THE EVENING. SOME STORMS MAY EVEN
CONTINUE AFTER MIDNIGHT.

AT 147 PM A FUNNEL CLOUD WAS REPORTED ABOUT 10 MILES SOUTH OF LARAMIE.

THE STORMS IN SOUTHWEST WYOMING WILL MAINLY PRODUCE STRONG WIND GUSTS
TO 45 MILES AN HOUR. THOSE IN THE SOUTHEAST WILL PRODUCE BRIEF HEAVY
RAIN...HAIL AND STRONG WINDS.

PEOPLE IN THE SOU\THEAST HALF OF WYOMING SHOULD BE AWARE OF THE
POSSIBILITY OF THUNDERSTORMS FOR THE REST OF THE AFTERNOON AND INTO
TONIGHT. IF A STORM APPROACHES...SEEK SAFE INDOOR SHELTER RIGHT
AWAY.
WEILAND

Local storm report, Jun 9, 3:12 PM MDT, 1 hour 27 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE SCOTTSBLUFF NE
300 PM MDT SUN JUN 9 1991

SELS MKC OMA A BFF...DATA FROM EARLY SUN.MORN  6/9/1991...

TIME         EVENT
 158 AM MDT  CHADRONA POLICE REPORTED HEAVY RAIN AND PEA-SIZE HAIL  IN
             THE CITY OF CHADRON...DAWES COUNTY.

 205 AM MDT  CHADRON WARNING POINT REPORTED RISING WATER AND LOWLAND
             FLOODING CHADRON STATE PARK...12S OF CHADRON...DAWES COUNTY

 232 AM MDT  LOWLAND FLOOpDING IN CHADRON STATE PARK...DAWES COUNTY.

 239 AM MDT  1/2 INCH HAIL AND HEAVY RAIN IN HAY SPRINGS...SHERIDAN
             COUNTY

EMANUEL/PEEK/PFEIFFER

Special weather statement, Jun 9, 3:41 PM MDT, 58 minutes before

NEZ001-005-011-092230-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SCOTTSBLUFF NE
340 PM MDT SUN JUN 9 1991

...TORNADO WATCH IN EFFECT UNTIL 9PM MDT FOR NEBRASKA PANHANDLE...

AT 338 PM MDT RADAR INDICATED A STRONG THUNDERSTORM 7 MILES NORTHWEST OF
KIMBALL...OR 35 MILES SOUTH OF SCOTTSBLUFF...IN KIMBALL COUNTY OF THE
NEBRASKA PANHANDLE.  THE STORM WAS MOVING TO THE EAST AT 20 MPH.

BRIEF HEAVY RAIN...STRONG GUSTY WIND...DEADLY LIGHTNING AND SMALL HAIL
IS POSSIBLE WITH THIS STORM IN KIMBALL COUNTY UNTIL 430 PM MDT.
EMANUEL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 8, 6:02 PM MDT	Severe Thunderstorm Warning	CYS	Deuel	28 min
Jun 9, 12:50 AM MDT	Severe Thunderstorm Warning	CYS	Sioux	40 min
Jun 9, 1:02 AM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Dawes	28 min
Jun 9, 1:30 AM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Dawes, Sheridan	45 min
Jun 9, 2:19 AM MDT	Severe Thunderstorm Warning	CYS	Sheridan	26 min
Jun 9, 4:00 PM MDT	Tornado Warning	CYS	Kimball	3 hr
Jun 9, 5:49 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne	26 min
Jun 9, 5:54 PM MDT	Tornado Warning	CYS	Box Butte	36 min

Nearby

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