Alert archive / Idaho / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 13, NWS Salt Lake City, UT

May 31, 1997Bear Lake County, Idaho

NWS Salt Lake City, UT issued this severe thunderstorm warning at May 31, 1997, 7:49 PM MDT for Bear Lake County, Idaho. It was in force for 31 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
May 31, 1997, 7:49 PM MDT (01:49 UTC)
Expired
May 31, 1997, 8:20 PM MDT
In force
31 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 01:48 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 00:00Z, 1.8 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 00:00Z on 1997-06-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 826 joules per kilogram.LCLEL10008507005003002001001 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 1997-06-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 83 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
826 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
3347 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
83 m²/s²
0-3 km storm-relative helicity
155 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.8

Open this sounding in Storm Lab

The text

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

001 
WUUS1 KSLC 010153 RRA
SVRSLC
IDC007-010220-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
749 PM MDT SAT MAY 31 1997

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY UT HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 820 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTHEASTERN IDAHO

   ...BEAR LAKE COUNTY
 
AT 747 PM MDT...A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER
RADAR 3 MILES SOUTHWEST OF MONTPELIER OR 3 MILES SOUTH OF BERN
MOVING NORTHEAST AT 35 MPH.

THIS STORM CAN BE EXPECTED IN THE VICINITY OF...
BERN                   AT AROUND 750 PM MDT
MONTPELIER             AT AROUND 750 PM MDT
PESCADERO              AT AROUND 755 PM MDT
BENNINGTON             AT AROUND 755 PM MDT

AT 745 PM WIND GUSTS TO 60 MPH WERE REPORTED NEAR BERN.
 
THESE STORMS MAY PRODUCE STRONG GUSTY WIND...LARGE HAIL...AND
FREQUENT LIGHTNING.  TAKE COVER WHEN THREATENING WEATHER APPROACHES.

&

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.