Alert archive / Wyoming / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 21, NWS Rapid City, SD
NWS Rapid City, SD issued this severe thunderstorm warning at Jun 19, 1986, 6:30 PM MDT for Converse County, Natrona County, Wyoming. It was in force for 60 min.
The area
The counties it named.
The facts
- Issued
- Jun 19, 1986, 6:30 PM MDT (00:30 UTC)
- Expired
- Jun 19, 1986, 7:30 PM MDT
- In force
- 60 min
- Issued by
- NWS Rapid City, SD
- Area
- Whole counties
Counties Converse County, WY, Natrona County, WY
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
Lander/Hunt Fiel, WY (KLND), launched 00:00Z, 0.5 hours before the alert went out and 208 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
- 494 J/kg
- Mixed-layer CIN
- -108 J/kg
- Mixed-layer LCL
- 2678 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 89 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KCPR 200034 SVRCPR WYC025-009-200130- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE CASPER WY 630 PM MDT THU JUN 19 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 730 PM MDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF EAST CENTRAL WYOMING...NATRONA AND CONVERSE AT 630 PM MDT RADAR INDICATED SEVERE THUNDERSTORMS IN THE CASPER AREA. THE THUNDERSTORMS ARE MOVING NORTHEAST AT 20 MILES AN HOUR. WITH THE HEAVY RAIN WITH THESE STORMS SOME FLOODING IS EXPECTED. PEOPLE IN NATRONA AND CONVERSE COUNTIES SHOULD SEEK SHELTER. SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH..LARGE HAIL.. DEADLY LIGHTNING..AND VERY HEAVY RAIN THAT CAN QUICKLY FLOOD LOW LYING AREAS. CHIELLINI
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 19, 3:36 PM MDT, 2 hours 54 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RAPID CITY SD 335 PM MDT THU JUN 19 1986 ...THUNDERSTORMS IN SOUTHWEST SOUTH DAKOTA... AT 330 PM MDT THUNDERSTORMS CONTINUED ALONG THE EAST SLOPES OF THE BLACK HILLS OF SOUTHWEST SOUTH DAKOTA..FROM JUST NORTH OF RAPID CITY TO 40 MILES SOUTH OF RAPID CITY..NEAR CUSTER. NO SEVERE WEATHER HAD BEEN REPORTED FROM THE THUNDERSTORMS..BUT SOME SMALL HAIL HAD FALLEN NEAR CUSTER AND WINDS GUSTED TO 48 MILES AN HOUR AT THE RAPID CITY REGIONAL AIRPORT..AT 311 PM MDT. THE THUNDERSTORMS WILL PRODUCE GUSTY WINDS..DANGEROUS LIGHTNING.. AND SOME HAIL. ALL PERSONS IN SOUTHWEST SOUTH DAKOTA SHOULD BE ALERT TO CHANGING WEATHER CONDITIONS AND SEEK SHEcLTER IF THREATENING WEATHER APPROACHES. DYRDAHL
The office that day
Everything else NWS Rapid City, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 7:25 PM MDT | Flash Flood Warning | UNR | Converse, Natrona | 3 hr |
| Jun 19, 7:45 PM MDT | Severe Thunderstorm Warning | UNR | Converse, Natrona | 45 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; the sounding from the Mesonet's radiosonde archive.