Alert archive / Utah / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 9, NWS Salt Lake City, UT

June 20, 2003Rich County, Utah; Bear Lake County, Idaho

NWS Salt Lake City, UT issued this severe thunderstorm warning at Jun 20, 2003, 6:15 PM MDT for Rich County, Utah; Bear Lake County, Idaho. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jun 20, 2003, 6:15 PM MDT (00:15 UTC)
Expired
Jun 20, 2003, 6:45 PM MDT
In force
30 min
Issued by
NWS Salt Lake City, UT
Area
Counties, with a storm outline in the text

Counties Bear Lake County, ID, Rich County, UT

The nearest sounding before it

Salt Lake City I, UT (KSLC), launched 00:00Z, 0.3 hours before the alert went out and 175 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 2003-06-21Temperature 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 00:00Z on 2003-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 14 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
3725 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
14 m²/s²
0-3 km storm-relative helicity
77 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.

000 
WUUS55 KSLC 210015
SVRSLC
IDC007-UTC033-210045-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
615 PM MDT FRI JUN 20 2003

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BEAR LAKE COUNTY IN IDAHO
  THIS INCLUDES THE CITY OF MONTPELIER
  NORTHERN RICH COUNTY IN UTAH
  THIS INCLUDES THE CITY OF LAKETOWN

* UNTIL 645 PM MDT

* AT 610 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  A LINE OF THUNDERSTORMS WITH STRONG WINDS FROM 8 MILES WEST OF 
  MONTPELIER TO LAKETOWN...OR FROM 8 MILES WEST OF MONTPELIER TO 2 
  MILES SOUTH OF LAKETOWN...MOVING NORTHEAST AT 30 MPH.

* SEVERE THUNDERSTORMS WILL BE...
  OVER MONTPELIER AT 625 PM MDT
  4 MILES SOUTHEAST OF GEORGETOWN AT 630 PM MDT

STRONG WIND GUSTS OF ABOUT 60 MPH ARE POSSIBLE AS THESE STORMS MOVE 
PAST.

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 4259 11165 4174 11141 4178 11102 4249 11107
          4260 11124

Nearby

Severe Thunderstorm Warnings in Utah, 2003Severe Thunderstorm Warnings in Idaho, 2003Every severe thunderstorm warning in 2003

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.