Alert archive / Wyoming / Tornado Warnings in 1989

Tornado Warning 12, NWS Cheyenne, WY

July 13, 1989Goshen County, Wyoming

NWS Cheyenne, WY issued this tornado warning at Jul 13, 1989, 3:07 PM MDT for Goshen County, Wyoming. It was in force for 68 min.

The area

The counties it named.

The facts

Issued
Jul 13, 1989, 3:07 PM MDT (21:07 UTC)
Expired
Jul 13, 1989, 4:15 PM MDT
In force
68 min
Issued by
NWS Cheyenne, WY
Area
Whole counties

County Goshen County, WY

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, 9.1 hours before the alert went out and 251 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 1989-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 208 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 1989-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 67 square meters per square second.1939Sfc1 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
208 J/kg
Mixed-layer CIN
-94 J/kg
Mixed-layer LCL
1403 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
67 m²/s²
0-3 km storm-relative helicity
-13 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 KCYS 132107
TORCYS
WYC015-132215-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING 
NATIONAL WEATHER SERVICE CHEYENNE WY
307 PM MDT THU JUL 13 1989

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 415 PM MDT FOR PEOPLE IN THE FOLLOWING COUNTY

   IN THE SOUTHEAST PART OF WYOMING
      SOUTHERN GOSHEN COUNTY

THIS WARNING INCLUDES THE TOWNS OF HAWK SPRINGS...LA GRANGE...AND
YODER.

AT 300 PM MDT THE PUBLIC REPORTED A FUNNEL CLOUD 10 MILES
SOUTHWEST OF HAWK SPRINGS. THIS STORM WAS MOVING EAST AT 20
MILES AN HOUR.

THIS IS A DANGEROUS STORM.  ACT QUICKLY.  IF YOU ARE IN THE PATH
OF THIS TORNADO MOVE TO A SHELTER BELOW GROUND IF AVAILA+BLE.
OTHERWISE...GO TO A SMALL INTERIOR ROOM ON THE LOWEST FLOOR
POSSIBLE.  AVOID WINDOWS.  ABANDON CARS AND MOBILE HOMES FOR A
REINFORCED BUILDING OR GET INTO A DITCH OR CULVERT.

MENTZER

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, Jul 13, 2:21 PM MDT, 46 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SCOTTSBLUFF NE
220 PM MDT THU JUL 13 1989

...THUNDERSTORMS IN THE NORTHERN NEBRASKA PANHANDLE...
...A SEVERE THUNDERSTORM WATCH FOR THE NEBRASKA PANHANDLE FROM 245PM MDT
TO 9PM MDT...

AT 215PM MDT...RADAR INDICATED THUNDERSTORMS IN THE NORTHERN NEBRASKA
PANHANDLE.  THE STRONGEST STORMS WERE LOCATED JUST WEST OF CHADRON
NEBRASKA IN DAWES COUNTY AND JUST EAST OF RUSHVILLE NEBRASKA IN NORTH
SHERDIDAN COUNTY.  THE STORMS WERE MOVING NORTHEAST AT 20 MPH.

STRONG GUSTY WINDS...BRIEF HEAVY RAIN...AND SMALL HAIL ARE POSSIBLE WITH
THESE STORMS AS THEY MOVE ACROSS DAWES AND SHERIDAN COUNTIES OF THE
NEBRASKA PANHANDLE UNTIL 430PM MDT.
PLISCHKE

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 12, 6:29 PM MDTSevere Thunderstorm WarningCYSSweetwater61 min
Jul 12, 6:34 PM MDTSevere Thunderstorm WarningCYSSweetwater56 min
Jul 13, 2:52 PM MDTSevere Thunderstorm WarningCYSGoshen68 min

Nearby

Tornado Warnings in Wyoming, 1989Every tornado warning in 1989Tornadoes in 1989

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.