Alert archive / Nebraska / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 13, NWS Cheyenne, WY

May 26, 1987Box Butte County, Sioux County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at May 26, 1987, 5:04 PM MDT for Box Butte County, Sioux County, Nebraska. It was in force for 56 min.

The area

The counties it named.

The facts

Issued
May 26, 1987, 5:04 PM MDT (23:04 UTC)
Expired
May 26, 1987, 6:00 PM MDT
In force
56 min
Issued by
NWS Cheyenne, WY
Area
Whole counties

Counties Box Butte County, NE, Sioux County, NE

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Rapid City, SD (KRAP), launched 12:00Z, 11.1 hours before the alert went out and 196 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, Rapid City, SD at 12:00Z on 1987-05-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Rapid City, SD at 12:00Z on 1987-05-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -20 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
2 J/kg
Mixed-layer CIN
-16 J/kg
Mixed-layer LCL
659 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
-20 m²/s²
0-3 km storm-relative helicity
78 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 262304
SVRBFF
NEC013-165-270000-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SCOTTSBLUFF NE
504 PM MDT TUE MAY 26 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 600 PM MDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

PANHANDLE OF NEBRASKA...BOX BUTTE...SOUTHEAST SIOUX AND THE CITY OF 
 ALLIANCE

AT 5 PM MDT..RADAR INDICATED A SEVERE THUNDERSTORM 10 MILES
NORTHEAST OF SCOTTSBLUFF NEBRASKA THAT WAS MOVING NORTHEAST AT
35 MPH.

REMEMBER A SEVERE THUNDERSTORM CAN PRODUCE DAMAGING WINDS IN EXCESS
OF 60 MPH..LARGE HAIL..DEADLY LIGHTNING AND VERY HEAVY RAIN THAT
CAN QUICKLY FLOOD LOW LYING AREAS.

THESE STORMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO WITH LITTLE
OR NO ADVANCE WARNING..SO BE ON THE LOOKOUT AND BE PREPARED TO MOVE
TO A PLACE OF SAFETY IF ONE IS SPOTTED.

KOSEL

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, May 26, 1:07 PM MDT, 3 hours 57 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
105 PM MDT TUE MAY 26 1987

A LINE OF STRONG THUNDERSTORMS EXTENDED FROM SOUTH OF CASPER WYOMING...
SOUTHEAST TO LARAMIE AND THEN DOWN ALONG THE FRONT RANGE IN COLORADO
AT 1 PM.  ANOTHER STRONG THUNDERSTORM WAS OCCURRING JUST SOUTH OF
CHEYENNE.

ALL OF THE THUNDERSTORMS WERE MOVING NORTH AT 15 MILES AN HOUR.

PEOPLE IN SOUTHEAST WYOMING SHOULD BE PREPARED FOR BRIEF HEAVY RAIN...
SMALL HAIL AND GUSTY WINDS WITH THE THUNDERSTORMS.  IF THREATENING
WEATHER APPROACHES...BE READY TO SEEK SHELTER IMMEDIATELY.

HATTEN
Special weather statement, May 26, 3:37 PM MDT, 1 hour 27 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SCOTTSBLUFF NE
335 PM MDT TUE MAY 26 1987

...THUNDERSTORMS MOVING INTO THE SOUTHWEST NEBRASKA PANHANDLE...

STRONG THUNDERSTORMS THAT DEVELOPED OVER SOUTHEAST WYOMING EARLIER
THIS AFTERNOON WERE BEGINNING TO MOVE INTO THE SOUTHWEST NEBRASKA
PANHANDLE. AT 330PM MDT THE STRONGEST STORMS WERE LOCATED ABOUT 40
MILES SOUTHWEST OF SCOTTSBLUFF NEBRASKA THAT WERE MOVING TO THE
NORTHEAST AT 35 MPH.

BRIEF HEAVY RAIN...STRONG GUSTY WIND AND HAIL IS POSSIBLE WITH THESE
STORMS OVER BANNER AND SCOTTS BLUFF COUNTIES OF THE NEBRASKA PANHANDLE
UNTIL 530PM MDT.

3/4 INCH HAIL WAS REPORTED IN SOUTHEAST WYOMING WITH THESE STORMS
EARLIER THIS AFTERNOOHN.
KOSEL

The office that day

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

IssuedProductOfficeCountiesLasted
May 26, 4:09 PM MDTSevere Thunderstorm WarningCYSBanner, Scotts Bluff56 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 1987Every severe thunderstorm warning in 1987

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.