Alert archive / Utah / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 48, NWS Salt Lake City, UT

July 9, 1997Salt Lake County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Jul 9, 1997, 5:21 PM MDT for Salt Lake County, Utah. It was in force for 39 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
Jul 9, 1997, 5:21 PM MDT (23:21 UTC)
Expired
Jul 9, 1997, 6:00 PM MDT
In force
39 min
Issued by
NWS Salt Lake City, UT
Area
Whole counties

County Salt Lake County, UT

The radar

The Salt Lake City radar (KMTX), 79 km from the middle of the area, began a volume at 23:24 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, 11.4 hours before the alert went out and 13 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 1997-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 26 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 1997-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 7 square meters per square second.1939Sfc1 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
26 J/kg
Mixed-layer CIN
-458 J/kg
Mixed-layer LCL
3228 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
7 m²/s²
0-3 km storm-relative helicity
20 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 
TTAA00 KSLC 092325 RRA
SVRSLC
UTC035-100005-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING FOR HIGH WINDS
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
521 PM MDT WED JUL 9 1997

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY UT HAS ISSUED A
SEVERE THUNDERSTORM HIGH WIND WARNING EFFECTIVE UNTIL 600 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN NORTHWESTERN UTAH

   ...SALT LAKE COUNTY
 
AT 515 PM MDT MICROBURST WINDS WERE OCCURRING OVER SOUTHERN SALT
LAKE COUNTY. THESE WINDS WILL MOVE ACROSS MOST OF THE SALT LAKE
VALLEY BY 600PM.  WIND GUSTS IN EXCESS OF 60 MPH CAN BE EXPECTED
FROM THIS EVENT.



LB

Nearby

Severe Thunderstorm Warnings in Utah, 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.