Alert archive / Wyoming / Tornado Warnings in 1987
Tornado Warning 3, NWS Cheyenne, WY
NWS Cheyenne, WY issued this tornado warning at May 29, 1987, 4:10 PM MDT for Johnson County, Wyoming. It was in force for 50 min.
The area
The counties it named.
The facts
- Issued
- May 29, 1987, 4:10 PM MDT (22:10 UTC)
- Expired
- May 29, 1987, 5:00 PM MDT
- In force
- 50 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
County Johnson 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
Lander/Hunt Fiel, WY (KLND), launched 12:00Z, 10.2 hours before the alert went out and 218 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1027 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 35 m²/s²
- 0-3 km storm-relative helicity
- 66 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KSHR 292216
TORSHR
WYC019-292300-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHERIDAN WY
410 PM MDT FRI MAY 29 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING EFFECTIVE
UNTIL 500 PM FOR PEOPLE IN THE FOLLOWING COUNTY...
IN NORTHEAST WYOMING
...SOUTHERN JOHNSON...
A TORNADO WAS SIGHTED 5 TO 6 MILES NORTHWEST OF KAYCEE OR ABOUT
45 MILE NORTH OF CASPER WY IN SOUTHERN JOHNSON COUNT OF WYOMING.
PERSONS IN SOUTHERN JOHNSON COUNTY OF WYOMING SHOULD TAKE COVER.
$$
ZEGLINWhat 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, May 29, 10:45 AM MDT, 5 hours 25 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SCOTTSBLUFF NE 1044 AM MDT FRI MAY 29 1987 THUNDERSTORMS WERE RUMBLING THROUGH PARTS OF THE EASTERN NEBRASKA PANHANDLE THIS MORNING. AT 1040 AM MDT...A BAND OF THUNDERSTORMS WITH HEAVY RAIN...GUSTY WINDS AND POSSIBLE SMALL HAIL WERE IN SOUTHERN SHERIDAN COUNTY OF THE NORTHEAST NEBRASKA PANHANDLE. THE BAND OF THUNDERSTORMS EXTENDED FROM 35 MILES NORTHEAST OF ALLIANCE NEBRASKA TO 35 MILES EAST OF ALLIANCE NEBRASKA. THE STORMS WERE MOVING SLOWLY NORTH AT 10 MPH. PERSONS IN SHERIDAN COUNTY SHOULD REMAIN ALERT FOR THESE STORMS UNTIL 12 30 PM MDT. OTHER SCATTERED SHOWERS AND THUNDERSHOWERS WERE OVER THE EAST PART OF THE NEBRASKA PANHANDLE AND ISOLATED SHOWERS WERE ALSO NOTED IN THE WEST NEBRASKA PANHANDLE. KARR
Special weather statement, May 29, 2:09 PM MDT, 2 hours 1 minute before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE VALENTINE NE ISSUED BY SCOTTSBLUFF NE 208 PM MDT FRI MAY 29 1987 THE SEVERE THUNDERSTORM WARNING FOR NORTHEAST CHERRY COUNTY OF NORTH CENTRAL NEBRASKA AND THE CITY OF VALENTINE REMAINS IN EFFECT UNTIL 330 PM CDT...230 PM MDT. AT 3 PM CDT...2 PM MDT...RADAR SHOWED THE SEVERE THUNDERSTORM WAS NEARLY STATIONARY 5 MILES SOUTH OF VALENTINE. THIS STORM SHOULD BEGIN TO MOVE SLOWLY TO THE NORTH. OTHER SCATTERED SHOWERS AND THUNDERSTORMS CONTINUED TO DEVELOP IN ALL OF CHERRY COUNTY OF NORTH CENTRAL NEBRASKA. THE STRONGEST OF THESE STORMS WAS 30 MILES SOUTHWEST OF VALENTINE. THIS SECOND STORM MAY PRODUCE SOME SMALL HAIL IN ADDITION TO HEAVYm RAINS. THESE THUNDERSTORMS WERE MOVING NORTH AT 10 MPH. KARR
Nearby
Tornado Warnings in Wyoming, 1987Every tornado warning in 1987Tornadoes 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.