Alert archive / Utah / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 103, NWS Salt Lake City, UT

September 12, 1998Davis County, Salt Lake County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Sep 12, 1998, 2:29 PM MDT for Davis County, Salt Lake County, Utah. It was in force for 41 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: Sep 12, 1998, 2:29 PM MDT (20:29 UTC)
Expired: Sep 12, 1998, 3:10 PM MDT
In force: 41 min
Issued by: NWS Salt Lake City, UT
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Davis County, UT, Salt Lake County, UT

The nearest sounding before it

Salt Lake City I, UT (KSLC), launched 12:00Z, 8.5 hours before the alert went out and 8 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1350 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 53 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

393 
WUUS1 KSLC 122033 RRA
SVRSLC
UTC011-035-122100-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
229 PM MDT SAT SEP 12 1998

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A

   * SEVERE THUNDERSTORM WARNING FOR...
     EASTERN DAVIS COUNTY IN UTAH
     SALT LAKE COUNTY IN UTAH
     INCLUDING KAYSVILLE...BOUNTIFUL...LAYTON AND SALT LAKE CITY

   * UNTIL 310 PM MDT

   * AT 222 PM MDT THE PUBLIC REPORTED A SEVERE THUNDERSTORM OVER    
     SALT LAKE INTERNATIONAL AIRPORT...OR ABOUT 6 MILES SOUTHWEST    
     OF SALT LAKE CITY...MOVING NORTHEAST AT 10 MILES PER HOUR.

   * OTHER LOCATIONS IN THE WARNING INCLUDE SOUTH SALT LAKE...
     TAYLORSVILLE...NORTH SALT LAKE...WEST VALLEY CITY...HOLLADAY...
     FARMINGTON...MURRAY AND CENTERVILLE

LARGE HAIL HAS BEEN REPORTED WITH THIS STORM. IF YOU ARE IN THE PATH 
OF THE STORM...PUT YOUR CAR IN A GARAGE AND MOVE TO A SUBSTANTIAL 
SHELTER.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN SALT LAKE CITY.

LAT...LON 4081 11215 4057 11190 4078 11172 4109 11198

The office that day

Everything else NWS Salt Lake City, UT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 12, 11:43 AM MDT	Severe Thunderstorm Warning	SLC	San Juan	17 min
Sep 12, 2:19 PM MDT	Severe Thunderstorm Warning	SLC	San Juan	26 min
Sep 12, 2:42 PM MDT	Severe Thunderstorm Warning	SLC	San Juan	18 min
Sep 12, 3:02 PM MDT	Severe Thunderstorm Warning	SLC	Utah	38 min
Sep 12, 3:31 PM MDT	Severe Thunderstorm Warning	SLC	Summit	39 min
Sep 12, 3:34 PM MDT	Severe Thunderstorm Warning	SLC	Utah	41 min
Sep 12, 5:10 PM MDT	Tornado Warning	SLC	Davis, Weber	35 min
Sep 12, 5:35 PM MDT	Severe Thunderstorm Warning	SLC	Box Elder, Weber	40 min

Nearby

Severe Thunderstorm Warnings in Utah, 1998 Every severe thunderstorm warning in 1998

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.