Alert archive / Utah / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 83, NWS Salt Lake City, UT

August 26, 1998Box Elder County, Cache County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Aug 26, 1998, 3:57 PM MDT for Box Elder County, Cache County, Utah. It was in force for 63 min. 1 report came from 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, with what was reported inside it.

The facts

Issued
Aug 26, 1998, 3:57 PM MDT (21:57 UTC)
Expired
Aug 26, 1998, 5:00 PM MDT
In force
63 min
Issued by
NWS Salt Lake City, UT
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Box Elder County, UT, Cache County, UT

The radar

The Salt Lake City radar (KMTX), 60 km from the middle of the area, began a volume at 21:59 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.

What was reported inside it

TimeReportWhereRemark
Aug 26, 4:00 PM MDTHail 0.75Thatcher, UT

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Salt Lake City I, UT (KSLC), launched 12:00Z, 10.0 hours before the alert went out and 99 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 1998-08-26Temperature 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, Salt Lake City I, UT at 12:00Z on 1998-08-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 124 square meters per square second.19395878Sfc1 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
1925 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
124 m²/s²
0-3 km storm-relative helicity
136 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.

002 
WUUS1 KSLC 262159 RRA
SVRSLC
UTC003-005-262300-

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

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A

   * SEVERE THUNDERSTORM WARNING FOR...
     CACHE COUNTY IN UTAH
     EASTERN BOX ELDER COUNTY IN UTAH
     INCLUDING TREMONTON...BRIGHAM CITY AND LOGAN

   * UNTIL 500 PM MDT

   * AT 349 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
     SEVERE THUNDERSTORM 9 MILES SOUTH OF HOWELL...OR ABOUT 16 MILES
     WEST OF TREMONTON...MOVING EAST AT 50 MILES PER HOUR.

   * OTHER LOCATIONS IN THE WARNING INCLUDE NORTH LOGAN...MENDON...
     PERRY...CLARKSTON...HYRUM...TRENTON...WELLSVILLE...CORINNE...
     SMITHFIELD...PLYMOUTH...WILLARD...HOWELL AND RICHMOND

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 4198 11154 4192 11262 4124 11272 4144 11189
          4144 11153

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 26, 1:25 PM MDTSevere Thunderstorm WarningSLCBox Elder65 min
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, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.