Alert archive / Nebraska / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 97, NWS Cheyenne, WY

June 5, 1991Scotts Bluff County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Jun 5, 1991, 7:00 PM MDT for Scotts Bluff County, Nebraska. It was in force for 39 min.

The area

The counties it named.

The facts

Issued
Jun 5, 1991, 7:00 PM MDT (01:00 UTC)
Expired
Jun 5, 1991, 7:39 PM MDT
In force
39 min
Issued by
NWS Cheyenne, WY
Area
Whole counties

County Scotts Bluff County, NE

The nearest sounding before it

Denver, CO (KDEN), launched 00:00Z, 1.0 hours before the alert went out and 224 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 1991-06-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1991-06-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 54 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2407 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
54 m²/s²
0-3 km storm-relative helicity
222 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this severe thunderstorm 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 5, 2:26 PM MDT, 4 hours 34 minutes before
WYZ012-017-052230-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
225 PM MDT WED JUN 5 1991

...THUNDERSTORMS CONTINUED IN SOUTHEAST WYOMING AND WERE MOVING INTO
WESTERN LARAMIE AND PLATTE COUNTIES...

AT 220 PM MDT...RADAR SHOWED THUNDERSTORMS WITH VERY HEAVY RAIN AND SMALL
HAIL HAD MOVED INTO LARAMIE AND PLATTE COUNTIES OF SOUTHEAST WYOMING.
THESE THUNDERSTORMS WERE LIKELY PRODUCING STRONG GUSTY WINDS AND DANGEROUS
LIGHTNING. THE STORNGEST THUNDERSTORMS WERE 30 MILES WEST OF CHEYENNE AND
30 MILES SOUTHWEST OF WHEATLAND. THE THUNDERSTORMS WERE MOVING NORTHEAST
AT 10 TO 15 MILES AN HOUR. WITH THE VERY HEAVY RAIN AND SLOW MOVEMENT...
SOME FLOODING MAY OCCUR.

PEOPLE IN WESTlERN PLATTE AND WESTERN LARAMIE COUNTIES INCLUDING THE TOWNS
OF WHEATLAND...CHUGWATER AND CHEYENNE SHOULD BE ALERT FOR THUNDERSTORMS
THIS AFTERNOON. MOVE IMMEDIATELY TO SHELTER IF THUNDERSTORMS APPROACH
BAKER
Special weather statement, Jun 5, 3:11 PM MDT, 3 hours 49 minutes before
WYZ012-016-017-052330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
310 PM MDT WED JUN 5 1991

...A TORNADO WATCH HAS BEEN ISSUED PARTS OF SOUTHEAST WYOMING UNTIL 9 PM...

A TORNADO WATCH HAS BEEN ISSUED FOR PARTS OF SOUTHEAST WYOMING INCLUDING
CONVERSE...PLATTE...ALBANY...NIOBRARA...GOSHEN AND LARAMIE COUNTIES. SOME
OF THE TOWNS IN THE WATCH AREA INCLUDE...LUSK...DOUGLAS...GLENROCK...
LARAMIE...WHEATLAND...TORRINGTON...ROCK RIVER...CHEYENNE AND PINE BLUFFS.
THUNDERSTORMS CONTINUED TO DEVELOP AND MOVE ACROSS SOUTHEAST WYOMING THIS
AFTERNOON.

AT 300 PM SOME OF THE STRONGEST THUNDERSTORMS WERE 15 MILES SOUTHWEST OF
WHEATLAND AND 15 MILES NORTHWEST OF DOUGLAS. THESE THUNDERSTORMS WERE
MOVING NORTHEAST AT 20 MILES AN HOUR. THUNDERSTORMS IN SOUTHEAST WYOMING
THIS AFTERNOON AND THIS EVENING MAY PRODUCE TORNADOES...HAIL...VERY HEAVY
RAIN...DAMAGING WINDS AND DANGEROUS LIGHTNING.
<
PEOPLE IN SOUTHEAST WYOMING SHOULD BE ALERT FOR THUNDERSTORMS. IF
A THUNDERSTORM APPROACHES...MOVE TO SHELTER IN A STRONG BUILDING.
MOBILE HOMES ARE NOT SAFE SHELTER FROM TORNADOES. MOVE TO THE LOWEST
LEVEL AND TO AN INTERIOR ROOM OF THE BUILDING. AVOID WINDOWS AND
ELECTRICAL EQUIPMENT WHEN THUNDERSTORMS ARE NEAR.
BAKER
Special weather statement, Jun 5, 4:25 PM MDT, 2 hours 35 minutes before
WYZ012-016-017-052330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
420 PM MDT WED JUN 5 1991

...A TORNADO WATCH HAS BEEN ISSUED PARTS OF SOUTHEAST WYOMING UNTIL 9 PM...

THUNDERSTORMS HAVE INCREASED IN COVERAGE OVER SOUTHEAST WYOMING SINCE
ABOUT 330 PM MDT. THE CITIES OF LARAMIE...ROCK RIVER...WHEATLAND...
CHUGWATER...CHEYENNE...AND CARPENTER HAVE HAD THUNDERSTORMS DURING
THE PAST HOUR. HOWEVER...NO SEVERE WEATHER HAS BEEN REPORTED SO FAR.
THE STRONGER STORMS HAVE PRODUCED ONE QUARTER TO FIVE EIGHTHS INCH
HAIL.

AT 420 PM RADAR SHOWED THE STRONGEST THUNDERSTORM WAS PASSING THROUGH
THE CARPENTER AREA. CARPENTER IS ABOUT 24 MILES EAST SOUTHEAST OF
CHEYENNE ALONG THE COLORADO BORDER. HEAVY RAIN...FREQUENT LIGHTNING...
MARBLE SIZED OR LARGER HAIL AND WIND GUSTS OVER 50 MILES AN HOUR ARE
POSSIBLE WITH THIS STORM.
<
THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES. THE CARPENTER
AREA CAN EXPECT VERY STRONG THUNDERSTORMS BETWEEN NOW AND 500 PM MDT.

PEOPLE IN SOUTHEAST WYOMING SHOULD BE ALERT FOR THUNDERSTORMS. IF
A THUNDERSTORM APPROACHES...MOVE TO SHELTER IN A STRONG BUILDING.
MOBILE HOMES ARE NOT SAFE SHELTER FROM TORNADOES. MOVE TO THE LOWEST
LEVEL "AND TO AN INTERIOR ROOM OF THE BUILDING. AVOID WINDOWS AND
ELECTRICAL EQUIPMENT WHEN THUNDERSTORMS ARE NEAR.

CAS
Special weather statement, Jun 5, 5:04 PM MDT, 1 hour 56 minutes before
NEZ001-005-011-060000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SCOTTSBLUFF NE
502 PM MDT WED JUN 5 1991

...TORNADO WATCH 488 UNTIL 9 PM MDT FOR MOST OF NEBRASKA PANHANDLE...

AT 500 PM MDT...RADAR INDICATED A LINE OF THUNDERSTORMS EXTENDING FROM
70 MILES WEST OF SIDNEY TO 60 MILES WEST IF CHADRON NEBRASKA IN EXTREME
EASTERN WYOMING.  THE LINE OF THUNDERSTORMS WAS MOVING NORTHEAST AT 20
MPH AND WILL BE ENTERING THE WESTERN NEBRASKA PANHANDLE AFTER 515 PM MDT.

BRIEF HEAVY RAIN...STRONG GUSTY WIND...HAIL AND DEADLY LIGHTNING ARE
POSSIBLE WITH THESE STORMS AS THEY MOVE INTO THE NEBRASKA PANHANDLE
UNTIL 600 PM MDT.

TORNADO WATCH 488 IS IN EFFECT FOR MOST OF THE NEBRASKA PANHANDLE UNTIL
9 PM MDT.
KYLE
Special weather statement, Jun 5, 5:45 PM MDT, 1 hour 15 minutes before
WYZ012-060020-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
545 PM MDT WED JUN 5 1991

...A TORNADO WATCH REMAINS IN EFFECT FOR SOUTHEAST WYOMING UNTIL 900 PM
MDT THIS EVENING...

AT 535 PM MDT...A LINE OF STRONG THUNDERSTORMS WAS DEVELOPING IN FAR
EASTERN GOSHEN COUNTY.  THIS LINE OF STORMS WAS LOCATED FROM TORRINGTON
TO LAGRANGE..WHICH IS 29 MILES SOUTH OF TORRINGTON...AND WAS MOVING
NORTHEAST AT 20 MILES AN HOUR.  THESE STORMS SHOULD BE MOVING OUT OF
WYOMING AND INTO NEBRASKA BY 620 PM MDT.

HEAVY RAIN...STRONG WINDS...FREQUENT LIGHTNING...PEA TO MARBLE SIZED
HAIL...AND LOCALIZED STREET FLOODING CAN BE EXPECTED WITH THESE STORMS.
IF YOU SEE A STORM APPROACHING...wSEEK SHELTER IMMEDIATELY.

PEOPLE IN SOUTHEAST WYOMING ARE REMINDED THAT A TORNADO WATCH ALSO
REMAINS IN EFFECT UNTIL 900 PM MDT THIS EVENING.
<
VIRGILLITO
Special weather statement, Jun 5, 6:26 PM MDT, 34 minutes before
WYZ012-016-017-060100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
625 PM MDT WED JUN 5 1991

...THE TORNADO WATCH FOR SOUTHEAST WYOMING HAS BEEN CANCELLED...

AT 625 PM MDT...THE STRONG THUNDERSTORMS WHICH WERE ALONG THE WYOMING/
NEBRASKA BORDER EARLIER HAD MOVED INTO THE NEBRASKA PANHANDLE.
SHOWERS AND THUNDERSTORMS WILL LINGER IN THE BORDER AREA FOR ANOTHER
HOUR OR SO...BUT THEY ARE NOT EXPECTED TO BE SEVERE. THEREFORE...THE
TORNADO WATCH HAS BEEN CANCELLED AS OF 630 PM MDT.

CAS

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 5, 6:08 PM MDTSevere Thunderstorm WarningCYSScotts Bluff, Sioux52 min
Jun 5, 6:25 PM MDTSevere Thunderstorm WarningCYSDawes50 min
Jun 5, 6:34 PM MDTTornado WarningCYSScotts Bluff26 min
Jun 5, 7:00 PM MDTSevere Thunderstorm WarningCYSBox Butte, Dawes39 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 1991Every severe thunderstorm warning 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.