Alert archive / Nebraska / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 8, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at May 23, 1987, 5:06 PM MDT for Dawes County, Sioux County, Nebraska. It was in force for 69 min.
The area
The counties it named.
The facts
- Issued
- May 23, 1987, 5:06 PM MDT (23:06 UTC)
- Expired
- May 23, 1987, 6:15 PM MDT
- In force
- 69 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
Counties Dawes 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
Denver, CO (KDEN), launched 12:00Z, 11.1 hours before the alert went out and 305 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
- 2 J/kg
- Mixed-layer CIN
- -186 J/kg
- Mixed-layer LCL
- 733 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 43 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, May 23, 1:48 PM MDT, 3 hours 18 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 150 PM MDT SAT MAY 23 1987 A LINE OF THUNDERSTORMS CONTINUED FROM EAST OF DOUGLAS WYOMING TO EAST OF WHEATLAND TO WEST OF CHEYENNE AT 145 PM. THE LINE WAS MOVING EAST AT 10 MILES AN HOUR...WHILE THE INDIVIDUAL THUNDERSTORMS WERE MOVING NORTHEAST AT 15 MILES AN HOUR. THE FUNNEL CLOUD REPORTED WEST OF WHEATLAND AT 1230 PM DISSIPATED AS THE THUNDERSTORM MOVED INTO THAT CITY. ONLY SOME BRIEF HEAVY RAINS AND INTENSE LIGHTNING WAS REPORTED IN THE CITY OF WHEATLAND. WHILE NO SEVERE WEATHER HAS BEEN REPORTED WITH ANY OF THESE STORMS... A FEW COULD STILL PRODUCE BRIEF HEAVY RAINS...HAIL AND STRONG WINDS. PEOPLE IN SOUTHEAST WYOMING THIS AFTERNOON SHOULD KEEP AN EYE ON THE SKY FOR THE THUNDERSTORMS. IF THREATENING WEATHER APPROACHES...BE READY TO SEEK SHELTER IMMEDIATELY. HATTEN
Special weather statement, May 23, 4:36 PM MDT, 30 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 435 PM MDT SAT MAY 23 1987 ...TORNADO WATCH FOR EXTREME EASTERN WYOMING UNTIL 10PM MDT... A TORNADO WATCH HAS BEEN POSTED FOR EXTREME EASTERN WYOMING UNTIL 10PM THIS SATURDAY EVENING. A VERY MOIST UNSTABLE AIRMASS PLUS FAVORABLE SURFACE AND UPPER LEVEL DISTURBANCES MAY PUSH A FEW THUNDERSTORMS IN THE EXTREME EAST INTO THE SEVERE CATEGORY THROUGH LATE EVENING. LARGE HAIL...DAMAGING WINDS AND TORNADOES ARE POSSIBLE WITH THE SEVERE THUNDERSTORMS. IN ADDITION HEAVY RAIN AND DANGEROUS LIGHTNING WILL OCCUR WITH THUNDERSTORMS. REMEMBER...SEVERE THUNDERSTORMS...AND ESPECIALLY TORNADOES...CAN STRIKE WITH LITTLE ADVANCE WARNING. WPEOPLE IN EXTREME EASTERN WYOMING SHOULD KEEP AN EYE TO THE SKY THROUGH LATE EVENING. IF YOU EXPERIENCE SEVERE WEATHER...REPORT IT TO THE NATIONAL WEATHER SERVICE OR TO THE NEAREST LAW ENFORCEMENT AGENCY AS SOON AS POSSIBLE. COX
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 5:00 PM MDT | Severe Thunderstorm Warning | CYS | Scotts Bluff | 45 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.