Alert archive / Idaho / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 45, NWS Salt Lake City, UT

June 18, 1997Bear Lake County, Idaho

NWS Salt Lake City, UT issued this severe thunderstorm warning at Jun 18, 1997, 2:50 PM MDT for Bear Lake County, Idaho. It was in force for 45 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
Jun 18, 1997, 2:50 PM MDT (20:50 UTC)
Expired
Jun 18, 1997, 3:35 PM MDT
In force
45 min
Issued by
NWS Salt Lake City, UT
Area
Whole counties

County Bear Lake County, ID

The radar

The Pocatello radar (KSFX), 144 km from the middle of the area, began a volume at 20:53 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, 8.8 hours before the alert went out and 174 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 1997-06-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 91 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 12:00Z on 1997-06-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 117 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
91 J/kg
Mixed-layer CIN
-263 J/kg
Mixed-layer LCL
2206 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
117 m²/s²
0-3 km storm-relative helicity
117 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

557 
WUUS1 KSLC 182053 RRA
SVRSLC
IDC007-182135-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
250 PM MDT WED JUN 18 1997

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY UT HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 335 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTHEASTERN IDAHO

   ...NORTHERN BEAR LAKE COUNTY
 
AT 247 PM MDT...A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER
RADAR 15 MILES NORTH OF MONTPELIER OR 4 MILES NORTH OF GEORGETOWN
MOVING EAST AT 25 MPH.

THIS STORM IS EXPECTED TO REMAIN IN RURAL AREAS BUT WILL AFFECT U.S.
ROUTE 30. 
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND...DESTRUCTIVE
HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 18, 2:34 PM MDTSevere Thunderstorm WarningSLCFranklin46 min

Nearby

Severe Thunderstorm Warnings in Idaho, 1997Every severe thunderstorm warning in 1997

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.