Alert archive / Nebraska / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 20, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Jun 8, 1987, 2:44 PM MDT for Deuel County, Nebraska. It was in force for 46 min. 1 report 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 8, 1987, 2:44 PM MDT (20:44 UTC)
- Expired
- Jun 8, 1987, 3:30 PM MDT
- In force
- 46 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
County Deuel County, NE
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 8, 3:00 PM MDT | Tornado F1 | Deuel, NE |
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
N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 8.7 hours before the alert went out and 145 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
- 735 J/kg
- Mixed-layer CIN
- -112 J/kg
- Mixed-layer LCL
- 1020 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 58 m²/s²
- 0-3 km storm-relative helicity
- 11 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
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 8, 11:11 AM MDT, 3 hours 33 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 1105 AM MDT MON JUNE 8 1987 ...FLASH FLOOD WATCH CONTINUES FOR SOUTHEAST WYOMING LATE THIS AFTERNOON AND EVENING... ABUNDANT MOISTURE IS AVIABLE IN SOUTHEAST WYOMING FOR POSSIBLE HEAVY DOWNPOURS THROUGH THE EVENING. THE RAIN THAT FELL YESTERDAY AND LAST NIGHT SATURATED THE GROUND OVER SOUTHEAST WYOMING. ADDITIONAL RAIN TODAY WILL POSE A FLASH FLOODING THREAT. THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WATCH FROM 3 PM THIS AFTERNOON UNTIL 12 MIDNIGHT TONIGHT FOR THE FOLLOWING COUNTIES IN SOUTHEAST WYOMING...ALBANY...LARAMIE...PLATTE...AND GOSHEN. PEOPLE IN THE WATCH AREA SHOULD KEEP INFORMED ABOUT THE DnEVELOPING WEATHER. STRONG THUNDERSTORMS WILL AGAIN DEVELOP OVER THE EASTERN HALF OF WYOMING THIS AFTERNOON. HAIL...GUSTY WINDS...AND FREQUENT LIGHTNING WILL ACCOMPANY SOME OF THESE STORMS. SIGLER
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 7, 6:30 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Platte | 60 min |
| Jun 7, 7:25 PM MDT | Severe Thunderstorm Warning | CYS | Platte | 65 min |
| Jun 7, 7:35 PM MDT | Tornado Warning | CYS | Platte | 55 min |
| Jun 7, 8:30 PM MDT | Severe Thunderstorm Warning | CYS | Laramie, Platte | 60 min |
| Jun 7, 9:03 PM MDT | Flash Flood Warning | CYS | Platte | 3 hr |
| Jun 7, 9:33 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 57 min |
| Jun 7, 10:04 PM MDT | Tornado Warning | CYS | Goshen | 56 min |
| Jun 8, 2:58 PM MDT | Tornado Warning | CYS | Deuel | 32 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.