Alert archive / Wyoming / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 69, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Aug 3, 1986, 3:05 PM MDT for Laramie County, Wyoming. It was in force for 25 min. 2 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
- Aug 3, 1986, 3:05 PM MDT (21:05 UTC)
- Expired
- Aug 3, 1986, 3:30 PM MDT
- In force
- 25 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
County Laramie 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 |
|---|---|---|---|
| Aug 3, 3:06 PM MDT | Hail 1 | Laramie, WY | |
| Aug 3, 3:10 PM MDT | Hail 1 | Laramie, 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, 9.1 hours before the alert went out and 202 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
- 440 J/kg
- Mixed-layer CIN
- -303 J/kg
- Mixed-layer LCL
- 1851 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 109 m²/s²
- 0-3 km storm-relative helicity
- 115 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KCYS 032106 SVRCYS WYC021-032130- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE CHEYENNE WY 0305 PM MDT SUN AUG 3 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 330 PM MDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF SOUTHEAST WYOMING..SOUTHERN LARAMIE AT 300 PM MDT 1 INCH HAIL WAS REPORTED OVER SOUTH CHEYENNE SOUTH OF INTERSTATE 80. THE THINDERSTORM WAS MOVING TO THE SOUTHE%AST AT 15 MPH. PEOPLE IN SOUTHERN LARAMIE COUNTY WYOMING SHOULD STAY IN A REINFORCED SHELTER AND BE PREPARED FOR LARGE HAIL...DAMAGING WINDS...DEADLY LIGHTNING AND HEAVY RAINS. LAUZE
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 3, 11:14 AM MDT, 3 hours 51 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 1115 AM MDT SUN AUG 3 1986 ...AFTERNOON THUNDERSTORMS EXPECTED FOR EASTERN WYOMING... HERE WE GO AGAIN WITH ANOTHER AFTERNOON AND EVENING OF WIDELY SCATTERD THUNDERSTORMS BUT OVER A LARGER AREA THAN YESTERDAY. THE ENTIRE EAST PLAINS OF WYOMING AS WELL AS THE BIG HORN BASIN OF NORTHCENTRAL WYOMING ARE UNDER THE GUN LATER IN THE DAY. LOW LEVEL MOSITURE CONTINUED TO FEED INTO EASTERN WYOMING THIS MORNING ON A SOUTH TO SOUTHEAST BREEZE. MEANWHILE ANOTHER UPPER LEVEL DISTURBANCE OVER NORTHWEST WYOMING THIS MORNING WAS EXPECTED TO SPREAD ITS DESTABILIZING INFLUENCE OVER NORTHCENTRAL AND EASTERN WYOMING LATER IN THE DAY. DAYTIME HEATING COMBINED WITH THE ABOVE MENTIONED INGREDIENTS WILL TRIGGER THE EXPECTED ROUND OF AFTERNOON THUNDERSTORMS. A FEW OF THESE THUNDERSTORMS COULD BECOME SEVERE AGAIN..WITH LARGE HAIL AND STRONG WINDS. LAUZE
Special weather statement, Aug 3, 1:48 PM MDT, 1 hour 17 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 145 PM MDT SUN AUG 3 1986 A SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED FOR MUCH OF EASTERN WYOMING UNTIL 9 PM MDT THIS SUNDAY EVENING. TOWNS INCLUDED IN THIS WATCH ARE CHEYENNE...WHEATLAND...TORRINGTON....LUSK...AND NEWCASTLE. AT 130 PM THIS AFTERNOON...WEATHER RADAR INDICATED THAT THUNDERSHOWERS HAD ALREADY BEGUN TO DEVELOP OVER THE SOUTHEAST CORNER OF WYOMING. THESE SHOWERS WERE MOVING TOWARD THE SOUTHEAST AT 25 MILES PER HOUR. MOIST UPSLOPE LOW LEVEL FLOW COMBINED WITH SURFACE HEATING WILL CONTINUE TO TRIGGER THUNDERSHOWERS THROUGH THIS AFTERNOON AND EVENING. SOME OF THESE THUNDERSHOWERS WILL CONTAIN LARGE HAIL...DAMAGING WINDS... AND BRIEF HEAVY RAIN. REMEMBER...LIGHTNING ALSO IS VERY DANGEROUS. IF YOU SEE THREATENING WEATHER...SEEK SHELTER IMMEDIATELY. PLEASE INFORM YOUR LOCAL LAW ENFORCEMENT AGENCY OR THE NATIONAL WEATHER SERVICE OF ANY SEVERE WEATHER AFTER THE DANGER HAS PASSED. MENTZER
Special weather statement, Aug 3, 2:34 PM MDT, 31 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SCOTTSBLUFF NE 230 PM MDT SUN AUG 3 1986 ...SEVERE THUNDERSTORMS WATCH IN EFFECT UNTIL 9PM MDT FOR ENTIRE NEBRASKA PANHANDLE... AT 230 PM MDT...RADAR INDICATED A STRONG THUNDERSTORM 45 MILES NORTHWEST OF CHADRON NEBRASKA...NEAR HOT SPRINGS SOUTH DAKOTA...MOVING SOUTHEAST AT 25 MILES AN HOUR. THIS STORM WILL MOVE INTO THE NORTHERN PORTIONS OF DAWES AND SHERIDAN COUNTIES OF THE PANHANDLE AROUND 4PM MDT THIS AFTERNOON. LOCALLY HEAVY RAIN..STRONG GUSTY WIND AND HAIL ARE POSSIBLE WITH THIS THUNDERSTORM. THE SEVERE THUNDERSTORM WATCH NUMBER 463 REMAINS IN EFFECT FOR ALL OF THE NEBRASKA PANHANDLE UNTIL 9PM MDT SUNDAY EVENING. PF EIFFER
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 6:45 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 45 min |
| Aug 3, 3:30 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 60 min |
| Aug 3, 5:15 PM MDT | Severe Thunderstorm Warning | CYS | Platte | 40 min |
Nearby
Severe Thunderstorm Warnings in Wyoming, 1986Every severe thunderstorm warning in 1986
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.