Alert archive / Utah / Flash Flood Warnings in 2001

Flash Flood Warning 8, NWS Salt Lake City, UT

July 8, 2001Tooele County, Utah

NWS Salt Lake City, UT issued this flash flood warning at Jul 8, 2001, 12:45 PM MDT for Tooele County, Utah. It was in force for 75 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 8, 2001, 12:45 PM MDT (18:45 UTC)
Expired
Jul 8, 2001, 2:00 PM MDT
In force
75 min
Issued by
NWS Salt Lake City, UT
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Tooele County, UT

The radar

The Salt Lake City radar (KMTX), 78 km from the middle of the area, began a volume at 18:45 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, 6.8 hours before the alert went out and 59 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 2001-07-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1053 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 2001-07-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -31 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
1053 J/kg
Mixed-layer CIN
-59 J/kg
Mixed-layer LCL
1357 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
-31 m²/s²
0-3 km storm-relative helicity
9 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

000 
WGUS55 KSLC 081845
FFWSLC

UTC045-082000-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1245 PM MDT SUN JUL 8 2001

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS CONTINUED THE

* FLASH FLOOD WARNING FOR...
  EAST CENTRAL TOOELE COUNTY IN UTAH
  THIS INCLUDES THE CITY OF GRANTSVILLE

* UNTIL 200 PM MDT

* AT 1235 PM MDT...WEATHER SERVICE PERSONNEL REPORTED FLASH FLOODING 
WEST OF GRANTSVILLE. MORE THUNDERSTORMS ARE APPROACHING THE AREA. 

FLASH FLOODING IS OCCURRING. IF YOU ARE IN THE WARNING AREA MOVE TO 
HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS 
IN THE GRANTSVILLE AREA SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT 
LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR 
WATERS OF UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE.

TO REPORT SEVERE WEATHER HAVE THE NEAREST LAW ENFORCEMENT AGENCY
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVI"CE FORECAST OFFICE IN
SALT LAKE CITY.

LAT...LON 4058 11260 4052 11253 4059 11243 4065 11251

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 7, 8:27 PM MDTFlash Flood WarningSLCPiute, Sevier78 min
Jul 8, 11:23 AM MDTFlash Flood WarningSLCTooele82 min
Jul 8, 12:58 PM MDTFlash Flood WarningSLCTooele92 min
Jul 8, 4:52 PM MDTSevere Thunderstorm WarningSLCCache, Rich38 min
Jul 8, 5:50 PM MDTFlash Flood WarningSLCKane, San Juan85 min

Nearby

Flash Flood Warnings in Utah, 2001Every flash flood 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.