Alert archive / Idaho / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 70, NWS Salt Lake City, UT

August 8, 1998Franklin County, Idaho; Cache County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Aug 8, 1998, 8:25 PM MDT for Franklin County, Idaho; Cache County, Utah. It was in force for 50 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 8, 1998, 8:25 PM MDT (02:25 UTC)
Expired
Aug 8, 1998, 9:15 PM MDT
In force
50 min
Issued by
NWS Salt Lake City, UT
Area
Whole counties

Counties Franklin County, ID, Cache County, UT

The nearest sounding before it

Salt Lake City I, UT (KSLC), launched 00:00Z, 2.4 hours before the alert went out and 131 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 00:00Z on 1998-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 160 joules per kilogram.LCLLFCEL10008507005003002001001 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 00:00Z on 1998-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -9 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
160 J/kg
Mixed-layer CIN
-49 J/kg
Mixed-layer LCL
3482 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
-9 m²/s²
0-3 km storm-relative helicity
19 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.

668 
WUUS1 KSLC 090227 RRA
SVRSLC
IDC041-UTC005-090315-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
825 PM MDT SAT AUG 8 1998

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A

   * SEVERE THUNDERSTORM WARNING FOR...
     SOUTHEASTERN FRANKLIN COUNTY IN IDAHO
     NORTHERN CACHE COUNTY IN UTAH

   * UNTIL 915 PM MDT

   * AT 820 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
     SEVERE THUNDERSTORM 2 MILES EAST OF FRANKLIN...OR ABOUT 8 MILES
     SOUTHEAST OF PRESTON...MOVING SOUTHEAST AT 20 MILES PER HOUR.

   * OTHER LOCATIONS IN THE WARNING INCLUDE LEWISTON...RICHMOND AND
     FRANKLIN

   * SEVERE THUNDERSTORM WILL BE...
     10 MILES EAST OF RICHMOND AT 850 PM MDT

HAIL...INTENSE RAIN AND STRONG DAMAGING WINDS ARE LIKELY WITH THIS 
STORM. TAKE COVER IN A SUBSTANTIAL SHELTER UNTIL THE STORM PASSES.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 9, 1:32 PM MDTFlash Flood WarningSLCKane, Washington118 min

Nearby

Severe Thunderstorm Warnings in Idaho, 1998Severe 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.