Alert archive / Utah / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 32, NWS Salt Lake City, UT

June 11, 1997Box Elder County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Jun 11, 1997, 3:53 PM MDT for Box Elder County, Utah. It was in force for 32 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 11, 1997, 3:53 PM MDT (21:53 UTC)
Expired: Jun 11, 1997, 4:25 PM MDT
In force: 32 min
Issued by: NWS Salt Lake City, UT
Area: Whole counties

County Box Elder County, UT

The radar

The Salt Lake City radar (KMTX), 60 km from the middle of the area, began a volume at 21:53 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

Elko, NV (KLKN), launched 12:00Z, 9.9 hours before the alert went out and 118 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 10 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 1031 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 55 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.

314 
WUUS1 KSLC 112200 RRA
SVRSLC
UTC003-112225-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
353 PM MDT WED JUN 11 1997

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY UT HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 425 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN NORTHWESTERN UTAH

   ...SOUTHWESTERN BOX ELDER COUNTY
 
AT 353 PM MDT...A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER
RADAR 18 MILES NORTH OF WENDOVER MOVING NORTH AT 30 MPH.

THIS STORM IS EXPECTED TO REMAIN OVER THE SALT FLATS.
 
THESE STORMS MAY PRODUCE STRONG GUSTY WIND...LARGE HAIL...AND
FREQUENT LIGHTNING.  TAKE COVER WHEN THREATENING WEATHER APPROACHES.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Local storm report, Jun 11, 10:05 AM MDT, 5 hours 48 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SALT LAKE CITY UTAH
1005 AM MDT WED JUN 11 1997

TIME(MDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1204 PM    CAINEVILLE                UT   1.75 INCH HAIL
06/10/97   WAYNE

0112 PM    HANKSVILLE                UT   1 INCH HAIL
06/10/97   WAYNE

0140 PM    BOUNTIFUL                 UT   .75 INCH HAIL
06/10/97   DAVIS

0140 PM    SALT LAKE CITY            UT   .75 INCH HAIL
06/10/97   SALT LAKE

0210 PM    SALT LAKE CITY            UT   .75 INCH HAIL
06/10/97   SALT LAKE                      ACTUAL REPORT FROM WEST
                                          VALLEY CITY

0235 PM    SALT LAKE CITY            UT   1 INCH HAIL
06/10/97   SALT LAKE                       ACTUAL REPORT FROM U OF UT
                                          AH

0240 PM    SALT LAKE CITY            UT   .75 INCH HAIL
06/10/97   SALT LAKE                      ACTUAL REPORT FROM CAPITOL
                                          HILL

0632 PM    HARRISVILLE               UT   1 INCH HAIL
06/10/97   WEBER

0636 PM    NORTH OGDEN               UT   .88 INCH HAIL
06/10/97   WEBER

0638 PM    NORTH OGDEN               UT   .75 INCH HAIL
06/10/97   WEBER

Local storm report, Jun 11, 10:06 AM MDT, 5 hours 47 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SALT LAKE CITY UTAH
1005 AM MDT WED JUN 11 1997

TIME(MDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1204 PM    CAINEVILLE                UT   1.75 INCH HAIL
06/10/97   WAYNE

0112 PM    HANKSVILLE                UT   1 INCH HAIL
06/10/97   WAYNE

0140 PM    BOUNTIFUL                 UT   .75 INCH HAIL
06/10/97   DAVIS

0140 PM    SALT LAKE CITY            UT   .75 INCH HAIL
06/10/97   SALT LAKE

0210 PM    SALT LAKE CITY            UT   .75 INCH HAIL
06/10/97   SALT LAKE                      ACTUAL REPORT FROM WEST
                                          VALLEY CITY

0235 PM    SALT LAKE CITY            UT   1 INCH HAIL
06/10/97   SALT LAKE                       ACTUAL REPORT FROM U OF UT
                                          AH

0240 PM    SALT LAKE CITY            UT   .75 INCH HAIL
06/10/97   SALT LAKE                      ACTUAL REPORT FROM CAPITOL
                                          HILL

0632 PM    HARRISVILLE               UT   1 INCH HAIL
06/10/97   WEBER

0636 PM    NORTH OGDEN               UT   .88 INCH HAIL
06/10/97   WEBER

0638 PM    NORTH OGDEN               UT   .75 INCH HAIL
06/10/97   WEBER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 10, 6:16 PM MDT	Severe Thunderstorm Warning	SLC	Weber	29 min
Jun 10, 6:41 PM MDT	Severe Thunderstorm Warning	SLC	Weber	29 min
Jun 11, 4:32 PM MDT	Severe Thunderstorm Warning	SLC	Box Elder	33 min

Nearby

Severe Thunderstorm Warnings in Utah, 1997 Every 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.