Alert archive / Nebraska / Tornado Warnings in 1991

Tornado Warning 33, NWS Cheyenne, WY

June 27, 1991Banner County, Nebraska

NWS Cheyenne, WY issued this tornado warning at Jun 27, 1991, 8:32 PM MDT for Banner County, Nebraska. It was in force for 28 min.

The area

The counties it named.

The facts

Issued: Jun 27, 1991, 8:32 PM MDT (02:32 UTC)
Expired: Jun 27, 1991, 9:00 PM MDT
In force: 28 min
Issued by: NWS Cheyenne, WY
Area: Whole counties

County Banner County, NE

The nearest sounding before it

Denver, CO (KDEN), launched 00:00Z, 2.5 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-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: 30 J/kg
Mixed-layer CIN: -75 J/kg
Mixed-layer LCL: 3617 m above ground
0-6 km bulk shear: 73 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 223 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 280232
TORBFF
NEC007-280300-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING 
NATIONAL WEATHER SERVICE SCOTTSBLUFF NE
832 PM MDT THU JUN 27 1991

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 900 PM MDT FOR PEOPLE IN THE FOLLOWING COUNTY

   IN THE PANHANDLE OF NEBRASKA
      EASTERN BANNER

AT 829 PM...RADAR CONTINUED TO INDICATE A TORNADO 25 MILES SOUTH OF
SCOTTSBLUFF OR JUST 5 MILES EAST OF HARRISBURG.  MOVEMENT WAS TO THE
NORTH 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.

PEEK

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 27, 7:04 PM MDT, 1 hour 28 minutes before

WYZ012-017-280145-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
704 PM MDT THU JUN 27 1991

SINCE 600 PM...WIDELY SCATTERED THUNDERSTORMS HAD DEVELOPED RAPIDLY
OVER THE SOUTHEAST CORNER OF WYOMING.  AT 655 PM...THE STRONGEST
STORM WAS JUST NORTHWEST OF PINE BLUFFS OR SOME 35 MILES EAST OF
CHEYENNE.  ANOTHER STRONG STORM WAS ABOUT 15 MILES SOUTHWEST OF
TORRINGTON...IN SOUTHERN GOSHEN COUNTY.

ALL OF THE THUNDERSTORMS WERE MOVING NORTH AT 20 MILES AN HOUR.

SCATTERED THUNDERSTORMS WILL CONTINUE IN THE SOUTHEAST CORNER OF
WYOMING UNTIL AROUND 10 PM THIS EVENING.  A FEW OF THESE STORMS MAY
PRODUCE BRIEF HEAVY RAIN...SMALL HAIL AND GUSTY WINDS.

HATTEN

Special weather statement, Jun 27, 7:12 PM MDT, 1 hour 20 minutes before

NEZ001-005-011-280200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SCOTTSBLUFF NE
708 PM MDT THU JUN 27 1991

...STRONG THUNDERSTORM IN THE SOUTHERN NEBRASKA PANHANDLE...

AT 706 PM MDT...RADAR INDICATED A STRONG THUNDERSTORM 15 MILES WEST OF
KIMBALL NEBRASKA...OR 40 MILES SOUTHWEST OF SCOTTSBLUFF...IN KIMBALL
COUNTY.  THE STORM WAS MOVING TO THE NORTH AT 20 MILES PER HOUR.

HEAVY RAIN...GUSTY WIND...SMALL HAIL AND LIGHTNING ARE POSSIBLE W=ITH THE
THUNDERSTORM IN KIMBALL AND BANNER COUNTIES OF THE NEBRASKA PANHANDLE
UNTIL 815 PM MDT.                                        ...EMANUEL...

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 27, 7:24 PM MDT	Severe Thunderstorm Warning	CYS	Banner, Kimball	36 min
Jun 27, 8:01 PM MDT	Tornado Warning	CYS	Banner	29 min
Jun 27, 8:57 PM MDT	Severe Thunderstorm Warning	CYS	Scotts Bluff	63 min
Jun 27, 9:47 PM MDT	Severe Thunderstorm Warning	CYS	Sioux	58 min
Jun 27, 10:06 PM MDT	Tornado Warning	CYS	Banner	39 min
Jun 27, 10:28 PM MDT	Tornado Warning	CYS	Scotts Bluff	32 min
Jun 27, 10:48 PM MDT	Severe Thunderstorm Warning	CYS	Sioux	57 min
Jun 27, 10:56 PM MDT	Severe Thunderstorm Warning	CYS	Scotts Bluff	34 min
Jun 27, 11:16 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte	29 min
Jun 27, 11:48 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte	57 min
Jun 28, 12:49 AM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Dawes	26 min
Jun 28, 1:12 AM MDT	Severe Thunderstorm Warning	CYS	Sheridan	33 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.