Alert archive / Utah / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 76, NWS Salt Lake City, UT

August 26, 1998Box Elder County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Aug 26, 1998, 1:25 PM MDT for Box Elder County, Utah. It was in force for 65 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
Aug 26, 1998, 1:25 PM MDT (19:25 UTC)
Expired
Aug 26, 1998, 2:30 PM MDT
In force
65 min
Issued by
NWS Salt Lake City, UT
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Box Elder County, UT

The radar

The Salt Lake City radar (KMTX), 115 km from the middle of the area, began a volume at 19:27 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

Elko, NV (KLKN), launched 12:00Z, 7.4 hours before the alert went out and 90 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, Elko, NV at 12:00Z on 1998-08-26Temperature 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, Elko, NV at 12:00Z on 1998-08-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 7 square meters per square second.1939587897Sfc1 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
3174 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
7 m²/s²
0-3 km storm-relative helicity
65 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.

999 
WUUS1 KSLC 261927 RRA
SVRSLC
UTC003-262030-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
125 PM MDT WED AUG 26 1998

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A

   * SEVERE THUNDERSTORM WARNING FOR...
     WESTERN BOX ELDER COUNTY IN UTAH
     INCLUDING PARK VALLEY

   * UNTIL 230 PM MDT

   * AT 117 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
     SEVERE THUNDERSTORM 8 MILES SOUTHWEST OF LUCIN...OR ABOUT 36
     MILES NORTH OF WENDOVER...MOVING EAST AT 25 MILES PER HOUR.

   * OTHER LOCATIONS IN THE WARNING INCLUDE LUCIN...YOST AND GROUSE
     CREEK

VERY LARGE HAIL IS POSSIBLE WITH THIS SEVERE THUNDERSTORM. 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 4199 11404 4102 11403 4102 11329 4200 11332

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 26, 2:01 PM MDTSevere Thunderstorm WarningSLCBox Elder, Cache44 min
Aug 26, 2:14 PM MDTSevere Thunderstorm WarningSLCTooele46 min
Aug 26, 2:24 PM MDTSevere Thunderstorm WarningSLCBox Elder51 min
Aug 26, 2:41 PM MDTSevere Thunderstorm WarningSLCCache, Rich64 min
Aug 26, 3:06 PM MDTSevere Thunderstorm WarningSLCBox Elder54 min
Aug 26, 3:57 PM MDTSevere Thunderstorm WarningSLCBox Elder, Cache63 min
Aug 26, 4:25 PM MDTSevere Thunderstorm WarningSLCDavis, Morgan, Weber50 min
Aug 26, 4:29 PM MDTSevere Thunderstorm WarningSLCSalt Lake, Utah, Wasatch31 min
Aug 26, 4:29 PM MDTSevere Thunderstorm WarningSLCSummit31 min
Aug 26, 5:15 PM MDTSevere Thunderstorm WarningSLCDavis, Morgan, Weber45 min
Aug 26, 5:15 PM MDTSevere Thunderstorm WarningSLCRich, Summit45 min
Aug 26, 5:27 PM MDTSevere Thunderstorm WarningSLCSalt Lake, Tooele48 min
Aug 26, 5:41 PM MDTSevere Thunderstorm WarningSLCBox Elder64 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.