Alert archive / Wyoming / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 42, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Jun 30, 1986, 12:50 AM MDT for Weston County, Wyoming. It was in force for 40 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
- Jun 30, 1986, 12:50 AM MDT (06:50 UTC)
- Expired
- Jun 30, 1986, 1:30 AM MDT
- In force
- 40 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
County Weston 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 30, 1:00 AM MDT | Hail 2 | Weston, WY | |
| Jun 30, 1:31 AM MDT | Hail 2 | Weston, 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
Rapid City, SD (KRAP), launched 00:00Z, 6.8 hours before the alert went out and 137 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
- 2168 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 1204 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- -66 m²/s²
- 0-3 km storm-relative helicity
- -30 m²/s²
- Significant tornado parameter
- -0.7
- Supercell composite
- -8.2
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 29, 9:27 PM MDT, 3 hours 23 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 925 PM MDT SUN JUN 29 1986 ...SEVERE THUNDERSTORM WATCH NUMBER 318 FOR NORTHEAST WYOMING HAS BEEN CANCELLED... THUNDERSTORM ACTIVITY WAS BEGINNING TO DECREASE IN INTENSITY IN WYOMING. HOWEVER...AT 920 PM RADAR INDICATED A STRONG THUNDERSTORM IN NORTH CENTRAL GOSHEN COUNTY ABOUT 55 MILES NORTHWEST OF SCOTTSBLUFF NEBRASKA. THIS STORM WAS MOVING TO THE NORTHEAST AT 20 MILES AN HOUR. RESIDENTS OF NORTHERN GOSHEN COUNTY SHOULD BE WATCHFUL AS THIS STORM MOVES TO THE EAST. SMALL HAIL...STRONG GUSTY WINDS...AND DANGEROUS LIGHTNING ARE ALL POSSIBLE. IF ANY SEVERE WEATHER IS SPOTTED...TAKE COVER...AND WHEN SAFE NOTIFY YOUR C5OUNTY SHERIFF. GLANCY
Local storm report, Jun 29, 9:51 PM MDT, 2 hours 59 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
945 PM MDT SUN JUNE 30 1985
ALL TIMES MOUNTAIN DAYLIGHT TIME..
858 PM... PATROL CAR DRIVING BACK FROM 25 MILES NORTH OF TORRINGTON
IN GOSHENA COUNTY IN SOUTHEAST WY..BROUGHT BACK EGG AND
BASEBALL SIZE HAIL TO TORRINGTION PD OFFICE ...APPROXIMATE
TIME OF OCCURANCE 815 TO 830 PM MDT
RIZZOSpecial weather statement, Jun 29, 10:17 PM MDT, 2 hours 33 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SCOTTSBLUFF NE 1015PM MDT SUN JUN 29 1986 ...SEVERE THUNDERSTORM WARNING CANCELLED FOR NORTHERN NEBRASKA PANHANDLE... THE SEVERE THUNDERSTORM WARNING ISSUED AT 920 PM MDT FOR NORTHERN SIOUX...WESTERN DAWES...AND NORTHWEST BOX BUTTE COUNTIES IN THE NORTHERN NEBRASKA PANHANDLE HAS BEEN CANCELLED. THE THUNDERSTORMS WHICH PROMPTED THE WARNING HAVE WEAKENED GREATLY AND ARE NO LONGER A THREAT TO THE AREA. AT 1010 PM MDT...RADAR INDICATES A STRONG THUNDERSTORM 8 MILES WEST OF HARRISON NEBRASKA ALONG THE NEBRASKA/WYOMING STATELINE MOVING NORTHEAST AT 20 MILES AN HOUR. HEAVY RAIN AND HAIL ARE POSSIBLE WITH THIS STORM AS IT MOVES NORTH OF HARRISON TOWARDS THE SOUTH DAKOTA LINE. PFEIFFER
Special weather statement, Jun 29, 10:42 PM MDT, 2 hours 8 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SCOTTSBLUFF NE 1040PM MDT SUN JUN 29 1986 ...SEVERE THUNDERSTORM WARNING CANCELLED FOR SIOUX AND DAWES COUNTIES... THE SEVERE THUNDERSTORM WARNING ISSUED AT 1024 PM MDT FOR NORTHERN SIOUX AND NORTHWEST DAWES COUNTIES OF THE NEBRASKA PANHANDLE HAS BEEN CANCELLED. THE THUNDERSTORM WHICH PROMPTED THE WARNING HAS WEAKENED GREATLY AND IS NO LONGER A THREAT TO THE AREA. AT 1040 PM MDT...RADAR INDICATES A THUNDERSTORM 25 MILES WEST OF CHADRON NEBRASKA IN NORTHEASTERN SIOUX COUNTY MOVING NORTHEAST AT 20 MILES AN HOUR. LOCALLY HEAVY RAIN AND SMALL HAIL ARE STILL POSSIBLE WITH THIS STORM AS IT MOVES TOWARD THE SOUTH DAKOTA LINE. PFEIFFER
Local storm report, Jun 29, 11:30 PM MDT, 1 hour 20 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE SCOTTSBLUFF NE
1130 PM MDT SUN JUN 29 1986
SELS MKC OMA A BFF
TIME EVENT
2 45 PM MDT BRIEF HEAVY RAIN BUT NO WIND OR HAIL AT KIMBALL NEBRASKA
FROM CIVIL DEFENSE DIR.
5 40 PM MDT WIND GUSTS TO 53 MPH AT WSMO ALLIANCE. NO THUNDER.
9 10 PM MDT TORNADO REPORTED BY PUBLIC 20 MILES NORTH OF SCOTTSBLUFF
NEBRASKA IN SIOUX COUNTY.
9 20 PM MDT GOLFBALL SIZE HAIL 7 MILES SOUTH OF HARRISON NEBRASKA IN
SIOUX COUNTY. KNOCKED OUT WINDSHIELD OF SPOTTER'S CAR.
11 05 PM MDT HOUSE STRUCK BY LIGHTNING IN CHADRON NEBRASKA CAUSED A
COMPLETE POWER LOSS...IN DAWES COUNTY.
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KOSEL/PFEIFFERLocal storm report, Jun 29, 11:35 PM MDT, 1 hour 15 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE SCOTTSBLUFF NE
1130 PM MDT SUN JUN 29 1986
SELS MKC OMA A BFF
TIME EVENT
2 45 PM MDT BRIEF HEAVY RAIN BUT NO WIND OR HAIL AT KIMBALL NEBRASKA
FROM CIVIL DEFENSE DIR.
5 40 PM MDT WIND GUSTS TO 53 MPH AT WSMO ALLIANCE. NO THUNDER.
9 10 PM MDT TORNADO REPORTED BY PUBLIC 20 MILES NORTH OF SCOTTSBLUFF
NEBRASKA IN SIOUX COUNTY.
9 20 PM MDT GOLFBALL SIZE HAIL 7 MILES SOUTH OF HARRISON NEBRASKA IN
SIOUX COUNTY. KNOCKED OUT WINDSHIELD OF SPOTTER'S CAR.
11 05 PM MDT HOUSE STRUCK BY LIGHTNING IN CHADRON NEBRASKA CAUSED A
COMPLETE POWER LOSS...IN DAWES COUNTY.
<
KOSEL/PFEIFFERThe office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 8:21 PM MDT | Severe Thunderstorm Warning | CYS | Sioux | 54 min |
| Jun 29, 8:34 PM MDT | Tornado Warning | CYS | Sioux | 26 min |
| Jun 29, 8:58 PM MDT | Tornado Warning | CYS | Sioux | 32 min |
| Jun 29, 9:26 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Dawes, Sioux | 54 min |
| Jun 29, 10:24 PM MDT | Severe Thunderstorm Warning | CYS | Dawes, Sioux | 51 min |
| Jun 30, 4:31 AM MDT | Severe Thunderstorm Warning | CYS | Dawes | 59 min |
| Jun 30, 5:28 AM MDT | Severe Thunderstorm Warning | CYS | Sheridan | 57 min |
| Jun 30, 4:44 PM MDT | Severe Thunderstorm Warning | CYS | Sioux | 51 min |
| Jun 30, 5:10 PM MDT | Severe Thunderstorm Warning | CYS | Dawes, Sheridan | 55 min |
| Jun 29, 7:15 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 30 min |
| Jun 29, 8:06 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 24 min |
| Jun 30, 12:01 AM MDT | Severe Thunderstorm Warning | CYS | Weston | 44 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.