Alert archive / Utah / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 9, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this severe thunderstorm warning at Sep 9, 1986, 10:59 AM MDT for Davis County, Salt Lake County, Tooele County, Utah. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Sep 9, 1986, 10:59 AM MDT (16:59 UTC)
- Expired
- Sep 9, 1986, 1:00 PM MDT
- In force
- 2 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Whole counties
Counties Davis County, UT, Salt Lake County, UT, Tooele 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
Salt Lake City I, UT (KSLC), launched 12:00Z, 5.0 hours before the alert went out and 42 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
- 80 J/kg
- Mixed-layer CIN
- -213 J/kg
- Mixed-layer LCL
- 1829 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 127 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 091659
SVRSLC
UTC011-035-057-003-045-091900-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1059 AM MDT TUE SEP 9 1986
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 100 PM MDT FOR PEOPLE IN THE FOLLOWING COUNTIES:
IN NORTH CENTRAL UTAH
..DAVIS..SALT LAKE..WEBER
IN NORTHWEST UTAH
..EASTERN BOX ELDER..NORTHEASTERN TOOELE
MILITARY PERSONNEL AT EAGLE RANGE REPORTED 3/4 TO 1 INCH DIAMETER
HAIL JUST BEFORE 1100 AM MDT. EAGLE RANGE IS ALONG THE WESTERN SHORES
OF THE GREAT SALT LAKE.
THIS LINE OF THUNDERSTORMS IS EXPECTED TO MOVE INTO THE WASATCH FRONT
DURING THE NEXT TWO HOURS. IT WILL BE ACCOMPANIED BY STRONG GUSTING
WINDS IN EXCESS OF 55 MPH.. POSSIBLE LARGE HAIL AND BRIEF HEAVY RAIN.
IF YOU ARE CAUGHT OUTSIDE, SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING. DAMAGING WIND, LARGE HAIL, BVERY HEAVY RAIN, AND
DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY
INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.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, Sep 9, 6:04 AM MDT, 4 hours 55 minutes before
SPECIAL WEATHER STATEMENT AND UTAH WEATHER SUMMARY NATIONAL WEATHER SERVICE SALT LAKE CITY UT 600 AM MDT TUE SEP 9 1986 TASTE OF AUTUMN..ANYONE?? AN UNSEASONABLY COLD LATE SUMMER TROUGH CENTERED OVER THE COLUMBIA RIVER BASIN OF OREGON AND WASHINGTON IS STILL HEADED TOWARDS UTAH. THE MAIN BATCH OF COLD AIR IS HAVING TROUBLE GETTING ORGANIZED IN SOUTHEAST OREGON AND NORTHWEST NEVADA BUT SHOULD GET ITS ACT TOGETHER DURING THIS MORNING. A COLD FRONT IS EXPECTED TO PASS THROUGH THE WASATCH FRONT DURING THE AFTERNOON AND THE REMAINDER OF THE STATE DURING TONIGHT. MUCH COLDER AIR WILL FOLLOW WITH A PERIOD OF RAIN TONIGHT INTO EARLY WEDNESDAY. THE SNOW LEVEL WILL BE LOWERING ALSO..GIVING MUCH OF THE HIGH COUNTY IN NORTHERN UTAH ITS FIRST SNOW OF THE SEASON. THE MAIN SNOW LEVEL SHOULD HOLD ABOUT 8000FT AND A FEW INCHES OF ACCUMULATION IS LIKELY ABOVE THAT ZONE. THIS MEANS MOST OF THE HIGH UINTA LAKES AS WELL AS STRAWBERRY RESERVOIR WILL GET AN EARLY DEPOSIT OF SNOW. THE GUSTY SOUTH WINDS OF MONDAY AFTERNOON MAY REAPPEAR TO SOME EXTENT TODAY ESPECIALLY IN THE SOUTHWEST VALLEYS. GUSTY WINDS FROM THE NORTHWEST SHOULD ACCOMPANY THE FRONTAL PASSAGE IN SOME AREAS ALONG WITH INCREASING SHOWERS AND THUNDERSHOWERS. AROUND THE STATE THIS MORNING..A BAND OF SHOWERS LINGERS OVER THE EXTREME NORTHWEST WITH A FEW LIGHT SPRINKLES REPORTED. A FEW SHOWERS OR THUNDERSHOWERS ARE ALSO IN PROGRESS ACROSS THE SOUTHEAST SECTION AND WILL LIKE)LY INCREASE AS THE DAY WEARS ON. TEMPERATURES JUST BEFORE DAWN ARE IN THE 50S AND 60S. KML...1200Z
The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 9, 10:59 AM MDT | Severe Thunderstorm Warning | SLC | Box Elder, Weber | 2 hr |
| Sep 9, 12:05 PM MDT | Tornado Warning | SLC | Davis, Weber | 55 min |
| Sep 9, 3:55 PM MDT | Flash Flood Warning | SLC | San Juan | 2 hr |
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.