Alert archive / Utah / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 4, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this severe thunderstorm warning at Jul 20, 1986, 5:01 PM MDT for Garfield County, Utah. It was in force for 59 min.
The area
The counties it named.
The facts
- Issued
- Jul 20, 1986, 5:01 PM MDT (23:01 UTC)
- Expired
- Jul 20, 1986, 6:00 PM MDT
- In force
- 59 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Whole counties
County Garfield County, UT
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
Grand Junction, CO (KGJT), launched 12:00Z, 11.0 hours before the alert went out and 293 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
- -303 J/kg
- Mixed-layer LCL
- 1923 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 30 m²/s²
- 0-3 km storm-relative helicity
- 110 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAAOO KSLC 202301
SVRSLC
UTC017-210000-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
501 PM MDT SUN JUL 20 1986
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 600 PM MDT FOR PEOPLE IN THE FOLLOWING COUNTIES:
IN SOUTH CENTRAL UTAH
..CENTRAL GARFIELD
A WEATHER OBSERVER IN ESCALANTE REPORTED ONE INCH HAIL BETWEEN 4PM
AND 445 PM THIS AFTERNOON ALONG WITH A FUNNEL CLOUD. THIS IS THE
RESULT OF HEAVY THUNDERSTORMS OVER CENTRAL GARFIELD COUNTY. OTHER
REPORTS OF LARGE HAIL HAVE BEEN RECEIVED IN SOUTHERN UTAH AND
NORTHERN ARIZONA THIS AFTERNOON.
IF YOU ARE CAUGHT OUTSIDE, SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING. DAMAGING WIND, LARGE HAIL, VERY HEAVY RAIN, AND
DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY
INSIDE AWAY FROM WINDOWS UNTIL THE STOR3M HAS PASSED.
ERC 20/2301ZWhat 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, Jul 20, 12:30 PM MDT, 4 hours 31 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 1230 PM MDT SUN JUL 20 1986 ...THUNDERSHOWERS RUMBLING IN THE SOUTHWEST PORTION OF UTAH... A MOIST UNSTABLE AIRMASS IS PRODUCING SCATTERED THUNDERSHOWERS IN MAINLY SOUTHWEST UTAH AT THIS TIME WITH SOME ACTIVITY OVER THE UINTAH MOUNTAINS OF NORTHERN UTAH. LIGHTNING DECTECTION EQUIPMENT INDICATES FREQUENT LIGHTNING IS OCCURRING FROM THESE CELLS. A REPORT WAS JUST RECEIVED FROM A WEATHER SPOTTER IN THE DUCK CREEK AREA OF SOUTHERN UTAH JUST EAST OF NAVAJO LAKE. HE INDICATED LITTLE RAINFALL BUT A CONSIDERABLE AMOUNT OF HAIL. THE HAIL COVERED THE GROUND ABOUT A 1/2 INCH IN SOME PLACES WITH PEA-SIZE DIAMETER HAIL WITH A FEW UP TO GOLF-BALL SIZE. MODERATE RAINFALL IS LIKELY THIS AFTERNOON IN PORTIONS OF SOUTHERN UTAH WITH SOME LOCALIZED HEAVY RAINFALL POSSIBLE AND SMALL HAIL. REMEMBER..LIGHTNING KILLS. DON`T BE A HUMAN LIGHTNING ROD. LIGHTNING NORMALLY STRIKES THE XTALLEST OBJECT IN THE AREA. SEEK PROPER PROTECTION WHEN LIGHTNING/THUNDER ARE IN THE AREA SUCH AS A CAR OR A BUILDING. FURTHER STATEMENTS WILL BE ISSUED AS REQUIRED. WJA/AX 1830Z....
Nearby
Severe Thunderstorm Warnings in Utah, 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.