Alert archive / Nebraska / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 54, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Aug 6, 1987, 5:03 PM MDT for Cheyenne County, Nebraska. It was in force for 57 min.
The area
The counties it named.
The facts
- Issued
- Aug 6, 1987, 5:03 PM MDT (23:03 UTC)
- Expired
- Aug 6, 1987, 6:00 PM MDT
- In force
- 57 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
County Cheyenne 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
Denver, CO (KDEN), launched 12:00Z, 11.1 hours before the alert went out and 151 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
- 3312 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- -11 m²/s²
- 0-3 km storm-relative helicity
- 13 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, Aug 6, 2:38 PM MDT, 2 hours 25 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 240 PM MDT THU AUG 6 1987 A SEVERE THUNDERSTORM WATCH FOR SOUTHEAST WYOMING UNTIL 8 PM TONIGHT AT 230 PM MDT THUNDERSTORMS WITH HEAVY RAINS AND STRONG WINDS WERE OVER CHEYENNE WYOMING AND ALSO 30 MILES NORTHWEST OF CHEYENNE NEAR HORSE CREEK. OTHER STRONG THUNDERSTORMS WERE BETWEEN RAWLINS AND ROCK SPRINGS AND 50 MILES EAST OF DOUGLAS. MOVEMENT WAS TO THE EAST AT 30 MILES AN HOUR. p ROGASH
Special weather statement, Aug 6, 3:04 PM MDT, 1 hour 59 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 305 PM MDT THU AUG 6 1987 A SEVERE THUNDERSTORM WATCH FOR SOUTHEAST WYOMING UNTIL 8 PM TONIGHT AT 3 PM MDT A VERY STRONG THUNDERSTORM WITH HEAVY RAINS...HIGH WINDS AND HAIL WAS 30 MILES NORTH OF CHEYENNE MOVING INTO THE VICINITY OF HAWK SPRINGS...LA GRANGE AND YODER WYOMING. PERSONS IN THE PATH OF THIS STORM SHOULD BE PREPARED TO TAKE SHELTER AS IT APPROACHES THEIR AREA. OTHER STRONG THUNDERSTORMS WERE IN THE VICINITY OF CHEYENNE...LARAMIE AND RAWLINS. MOVEMENT WAS TO THE EAST AT 30 MILES AN HOUR. ROGASH
Special weather statement, Aug 6, 3:35 PM MDT, 1 hour 28 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 335 PM MDT THU AUG 6 1987 A VERY STRONG THUNDERSTORM WAS INDICATED BY RADAR ABOUT 25 MILES NORTHEAST OF RAWLINS. THIS STORM WAS MOVING TOWARDS THE NORTHEAST AT 25 MILES AN HOUR. THE STORM WILL REACH THE SOUTHERN END OF THE SEMINOE RESERVOIR ABOUT 430 PM MDT THIS AFTERNOON. THIS STORM IS CAPABLE OF PRODUCING HAIL AND STRONG GUSTY WINDS. PEOPLE WHO ARE BOATING ON THE SEMINOE RESERVOIR SHOULD MOVE OFF THE LAKE. REMEMBER...LIGHTNING IS VERY DANGEROUS AND CAN KILL. MENTZER
Special weather statement, Aug 6, 4:12 PM MDT, 51 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 410 PM MDT THU AUG 6 1987 AT 400 PM MDT A SEVERE THUNDERSTORM WITH LARGE HAIL...HIGH WINDS AND HEAVY RAINS WAS 40 MILES NORTHEAST OF CHEYENNE MOVING INTO THE VICINITY OF LAGRANGE AND ALBIN. PERSONS IN THE PATH OF THIS STORM SHOULD BE PREPARED TO TAKE SHELTER. NUMEROUS THUNDERSTORMS AND RAINSHOWERS COVERED SOUTHEAST WYOMING WITH OTHER HEAVY ACTIVTY NEAR CHEYENNE...10 TO 30 MILES EAST OF CHEYENNE NEAR BURNS AND PINE BLUFFS AND 40 MILES SOUTH OF DOUGLAS. THESE STORMS MAY PRODUCE SMALL HAIL AND HEAVY RAINS. MOVEMENT WAS TO THE EAST AT 30 MILES AN HOUR. ROGASH
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 6, 3:55 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 40 min |
| Aug 6, 4:35 PM MDT | Tornado Warning | CYS | Kimball | 25 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.