Alert archive / Utah / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 21, NWS Salt Lake City, UT

July 6, 2001Salt Lake County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Jul 6, 2001, 6:30 PM MDT for Salt Lake County, Utah. 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 the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued
Jul 6, 2001, 6:30 PM MDT (00:30 UTC)
Expired
Jul 6, 2001, 7:00 PM MDT
In force
30 min
Issued by
NWS Salt Lake City, UT
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Salt Lake County, UT

The radar

The Salt Lake City radar (KMTX), 70 km from the middle of the area, began a volume at 00:29 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, 0.5 hours before the alert went out and 15 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 2001-07-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 453 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 00:00Z on 2001-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -4 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
453 J/kg
Mixed-layer CIN
-84 J/kg
Mixed-layer LCL
2520 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
-4 m²/s²
0-3 km storm-relative helicity
78 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

Open this sounding in Storm Lab

The text

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

000 
WUUS55 KSLC 070032
SVRSLC

UTC035-070100-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
630 PM MDT FRI JUL 6 2001

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN SALT LAKE COUNTY IN UTAH
  THIS INCLUDES THE CITY OF WEST VALLEY CITY

* UNTIL 700 PM MDT

* AT 618 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 5 MILES SOUTHWEST OF KEARNS...OR ABOUT 7 MILES
  SOUTHWEST OF WEST VALLEY CITY...MOVING NORTH AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE...
  BETWEEN MAGNA AND WEST VALLEY CITY AT 640 PM AND NEAR SALT LAKE
  INTERNATIONAL AIRPORT AT 700 PM.  

STRONG WINDS AND LARGE HAIL ARE POSSIBLE WITH THIS STORM. 

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 4059 11217 4054 11194 4080 11190 4088 11200
          4086 11211

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 6, 6:10 PM MDTSevere Thunderstorm WarningSLCBeaver, Iron35 min
Jul 6, 6:20 PM MDTSevere Thunderstorm WarningSLCKane, San Juan25 min
Jul 6, 7:26 PM MDTFlash Flood WarningSLCWashington64 min
Jul 7, 5:15 PM MDTSevere Thunderstorm WarningSLCRich, Summit45 min

Nearby

Severe Thunderstorm Warnings in Utah, 2001Every severe thunderstorm warning in 2001

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.