Alert archive / Wyoming / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 30, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Jun 23, 1987, 5:10 PM MDT for Goshen County, Wyoming. It was in force for 65 min. 3 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jun 23, 1987, 5:10 PM MDT (23:10 UTC)
- Expired
- Jun 23, 1987, 6:15 PM MDT
- In force
- 65 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 23, 5:15 PM MDT | Hail 0.75 | Goshen, WY | |
| Jun 23, 6:00 PM MDT | Hail 0.75 | Goshen, WY | |
| Jun 23, 6:00 PM MDT | Thunderstorm Wind 50 | Goshen, WY |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Denver, CO (KDEN), launched 12:00Z, 11.2 hours before the alert went out and 264 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
- 964 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 31 m²/s²
- 0-3 km storm-relative helicity
- 149 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 23, 3:31 PM MDT, 1 hour 39 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 330 PM MDT TUE JUN 23 1987 AT 325 PM A STRONG THUNDERSTORM HAS DEVELOPED IN SOUTHERN PLATTE COUNTY JUST NORTHWEST OF CHUGWATER...SOME 40 MILES NORTH OF CHEYENNE. THE STORM HAS DEVELOPED RAPIDLY...AND PEOPLE IN SOUTHERN PLATTE COUNTY SHOULD WATCH THIS STORM CLOSELY. GUSTY WINDS...BRIEF HEAVY RAIN...AND SOME SMALL HAIL ARE POSSIBLE AS IT MOVES NORTHEAST TOWARDS THE TOWN OF SLATER...ABOUT 50 MILES NORTH OF CHEYENNE. THE STORM SHOULD BE MOVING INTO GOSHEN COUNTY BY 415 PM. DASELER
Special weather statement, Jun 23, 3:57 PM MDT, 1 hour 13 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 350 PM MDT TUE JUN 23 1987 AT 345 PM VERY STRONG THUNDERSTORMS WERE IN SOUTH PLATTE COUNTY OF WYOMING 40 MILES NORTHWEST TO 60 MILES NORTH OF CHEYENNE AROUND SLATER... AND CHUGWATER. THESE STORMS HAVE PRODUCED PEA TO MARBLE SIZED HAIL ONE MILE NORTH OF SLATER. THESE STORMS WILL ALSO PRODUCE STRONG WINDS AND VERY HEAVY RAINS WITH POSSIBLE LOW AREA FLOODING. MOVEMENT WAS TO THE EAST TO 20 MILES AN HOUR. PERSONS LIVING AROUND SLATER AND CHUGWATER SHOULD STAY ALERT FOR DANGEROUS WEATHER. ROGASH
Special weather statement, Jun 23, 4:01 PM MDT, 1 hour 9 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 350 PM MDT TUE JUN 23 1987 AT 345 PM VERY STRONG THUNDERSTORMS WERE IN SOUTH PLATTE COUNTY OF WYOMING 40 MILES NORTHWEST TO 60 MILES NORTH OF CHEYENNE AROUND SLATER... AND CHUGWATER. THESE STORMS HAVE PRODUCED PEA TO MARBLE SIZED HAIL ONE MILE NORTH OF SLATER. THESE STORMS WILL ALSO PRODUCE STRONG WINDS AND VERY HEAVY RAINS WITH POSSIBLE LOW AREA FLOODING. MOVEMENT WAS TO THE EAST AT 20 MILES AN HOUR. PERSONS LIVING AROUND SLATER AND CHUGWATER SHOULD STAY ALERT FOR DANGEROUS WEATHER. ROGASH
Special weather statement, Jun 23, 4:44 PM MDT, 26 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 440 PM MDT TUE JUN 23 1987 AT 435 PM TWO VERY STRONG THUNDERSTORMS WERE NOTED BY WEATHER RADAR. ONE THUNDERSTORM WAS LOCATED IN SOUTHERN PLATTE COUNTY AND THE OTHER THUNDERSTORM WAS IN SOUTH CENTRAL GOSHEN COUNTY IN SOUTHEAST WYOMING. THE TWO SEPERATE STORMS WERE MOVING TO THE EAST AT NEARLY 20 MILES AN HOUR. THE STORM IN SOUTHERN PLATTE COUNTY IS 60 MILES NORTH OF CHEYENNE NEAR THE TOWN OF CHUGWATER AND THE OTHER STORM IN GOSHEN COUNTY IS SOME 80 MILES NORTH NORTHEAST OF CHEYENNE NEAR THE TOWN OF YODER. THESE STORMS WILL PRODUCE STRONG WINDS AND BRIEF HEAVY RAIN WITH HAIL. SOME LOW AREA FLOODING IS POSSIBLE UNTIL 6PM THIS TUESDAY EVENING. NEAR THE THUNDERSTORMS. PERSONS LIVING AROUND YODER AND CHUGWATER SHOULD STAY ALERT FOR DANGEROUS WEATHER. SIGLER
Nearby
Severe Thunderstorm Warnings in Wyoming, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.