Alert archive / Utah / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 19, NWS Salt Lake City, UT

June 7, 1998Utah County, Wasatch County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Jun 7, 1998, 3:11 PM MDT for Utah County, Wasatch County, Utah. It was in force for 34 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
Jun 7, 1998, 3:11 PM MDT (21:11 UTC)
Expired
Jun 7, 1998, 3:45 PM MDT
In force
34 min
Issued by
NWS Salt Lake City, UT
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Utah County, UT, Wasatch County, UT

The radar

The Salt Lake City radar (KMTX), 127 km from the middle of the area, began a volume at 21:11 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Salt Lake City I, UT (KSLC), launched 12:00Z, 9.2 hours before the alert went out and 57 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-pSkew-T log-p diagram, Salt Lake City I, UT at 12:00Z on 1998-06-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Salt Lake City I, UT at 12:00Z on 1998-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 28 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1469 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
28 m²/s²
0-3 km storm-relative helicity
134 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.

903 
WUUS1 KSLC 072115 RRA
SVRSLC
UTC049-051-072145-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
311 PM MDT SUN JUN 7 1998

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A

   * SEVERE THUNDERSTORM WARNING FOR...
     NORTHWESTERN WASATCH COUNTY IN UTAH
     NORTH CENTRAL UTAH COUNTY IN UTAH
     INCLUDING HEBER CITY AND PROVO

   * UNTIL 345 PM MDT

   * AT 306 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
     SEVERE THUNDERSTORM OVER PROVO...MOVING NORTHEAST AT 20 MILES
     PER HOUR.

   * OTHER LOCATIONS IN THE WARNING INCLUDE SUNDANCE...MIDWAY...
     WALLSBURG AND DANIEL

   * SEVERE THUNDERSTORM WILL BE...
     
     6 MILES NORTHEAST OF DANIEL AT 325 PM MDT
     21 MILES NORTHEAST OF DANIEL AT 335 PM MDT

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



LAT...LON 4023 11173 4021 11166 4039 11120 4058 11158
ERC...2114Z

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 7, 3:13 PM MDTSevere Thunderstorm WarningSLCMorgan47 min

Nearby

Severe Thunderstorm Warnings in Utah, 1998Every 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; radar from the NEXRAD Level II archive.