Alert archive / Utah / Flash Flood Warnings in 1997

Flash Flood Warning 44, NWS Salt Lake City, UT

September 8, 1997Garfield County, Iron County, Utah

NWS Salt Lake City, UT issued this flash flood warning at Sep 8, 1997, 3:38 PM MDT for Garfield County, Iron County, Utah. It was in force for 117 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: Sep 8, 1997, 3:38 PM MDT (21:38 UTC)
Expired: Sep 8, 1997, 5:35 PM MDT
In force: 117 min
Issued by: NWS Salt Lake City, UT
Area: Whole counties

Counties Garfield County, UT, Iron County, UT

The nearest sounding before it

Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 9.6 hours before the alert went out and 296 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: 337 J/kg
Mixed-layer CIN: -80 J/kg
Mixed-layer LCL: 1600 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 67 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 082140
FFWSLC
UTC021-017-082335-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
338 PM MDT MON SEP 8 1997

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY UT HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 535 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTHWESTERN UTAH

   ...EASTERN IRON COUNTY...AND WESTERN GARFIELD COUNTY...
 
...FLASH FLOOD WARNING FOR EASTERN IRON AND WESTERN GARFIELD
COUNTIES UNTIL 535 PM...
 
HEAVY RAINFALL AND FLASH FLOODING HAS BEEN REPORTED IN PARAGONAH
AND PAROGONAH CANYON.  ADDITIONAL HEAVY RAINFALL WILL CONTINUE
IN THE WARNING AREA UNTIL ABOUT 535 PM.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING O`R IS
IMMINENT. MOVE TO HIGHER GROUND TO ESCAPE RISING WATER.

&

ERC...2140Z

What forecasters said that day

The local office's own words before this flash flood 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, Sep 8, 10:31 AM MDT, 5 hours 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  SALT LAKE CITY UT
1031 AM MDT MON SEP 8 1997

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

0300 AM    PLEASANT GROVE            UT   1.25 INCH HAIL
09/07/97   UTAH

0300 AM    AMERICAN FORK             UT   1.00 INCH HAIL
09/07/97   UTAH

0300 AM    OREM                      UT   1.00 INCH HAIL
09/07/97   UTAH                           NORTHEAST OREM

0300 AM    PLEASANT GROVE            UT   1.50 INCH HAIL
09/07/97   UTAH                           IN CEDAR HILLS JUST EAST
                                          OF PLEASANT GROVE
END

Local storm report, Sep 8, 10:35 AM MDT, 5 hours 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  SALT LAKE CITY UT
1031 AM MDT MON SEP 8 1997

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

0300 AM    PLEASANT GROVE            UT   1.25 INCH HAIL
09/07/97   UTAH

0300 AM    AMERICAN FORK             UT   1.00 INCH HAIL
09/07/97   UTAH

0300 AM    OREM                      UT   1.00 INCH HAIL
09/07/97   UTAH                          H NORTHEAST OREM

0300 AM    PLEASANT GROVE            UT   1.50 INCH HAIL
09/07/97   UTAH                           IN CEDAR HILLS JUST EAST
                                          OF PLEASANT GROVE
END

Local storm report, Sep 8, 10:37 AM MDT, 5 hours 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  SALT LAKE CITY UT
1037 AM MDT MON SEP 8 1997

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

0658 AM    HILL AIR FORCE BASE       UT   0.75 INCH HAIL
09/07/97   DAVIS

END

Local storm report, Sep 8, 10:39 AM MDT, 4 hours 59 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  SALT LAKE CITY UT
1037 AM MDT MON SEP 8 1997

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

0R658 AM    HILL AIR FORCE BASE       UT   0.75 INCH HAIL
09/07/97   DAVIS

END

Special weather statement, Sep 8, 1:00 PM MDT, 2 hours 38 minutes before

IDZ024-025-UTZ001>027-WYZ021-090400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
100 PM MDT MON SEP 8 1997

...SHOWERS AND THUNDERSTORMS REDEVELOPING OVER UTAH AGAIN THIS
AFTERNOON AND EVENING...

A WEATHER DISTURBANCE IS MOVING INTO WEST CENTRAL UTAH THIS AFTERNOON
AND ANOTHER IS EXPECTED TO MOVE INTO SOUTHERN UTAH LATE THIS
AFTERNOON.  THESE DISTURBANCES IN ADDITION TO A PLENTIFUL SUPPLY OF
MOISTURE WILL CREATE CONDITIONS FAVORABLE FOR STRONG THUNDERSTORMS
ALONG WITH SIGNIFICANT RAINFALL FOR ALMOST ANYWHERE IN UTAH THIS
AFTERNOON AND EVENING.

SOME OF THESE THUNDERSTORMS WILL BE SLOW MOVING.  RAINFALL AMOUNTS OF
THREE-QUARTERS OF AN INCH OF RAIN OR MORE IN A SHORT PERIOD OF TIME
COULD CAUSE SOME SMALL STREAM AND URBAN FLOODING.  IN ADDITION...SOME
OF THE STRONGER THUNDERSTORMS WILL BE ACCOMPANIED BY BRIEF GUSTY
WINDS IN THE 40-45 MPH RANGE...FREQUENT LIGHTNING AND HAIL.

STRONG THUNDERSTORMS HAVE ALREADY DEVELOPED OVER AREAS OF UTAH THIS
AFTERNOON TO INCLUDE THE EXTREME NORTH...WEST CENTRAL AND SOUTH
CENTRAL PORTIONS.

STAY TUNED TO RADIO...TV...CABLE TV...OR NOAA WEATHER RADIO FOR
UPDATES ON THIS DEVELOPING WEATHER SITUATION.

ERC...1855Z

Special weather statement, Sep 8, 1:06 PM MDT, 2 hours 32 minutes before

IDZ024-025-UTZ001>027-WYZ021-090400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
100 PM MDT MON SEP 8 1997

...SHOWERS AND THUNDERSTORMS REDEVELOPING OVER UTAH AGAIN THIS
AFTERNOON AND EVENING...

A WEATHER DISTURBANCE IS MOVING INTO WEST CENTRAL UTAH THIS AFTERNOON
AND ANOTHER IS EXPECTED TO MOVE INTO SOUTHERN UTAH LATE THIS
AFTERNOON.  THESE DISTURBANCES IN ADDITION TO A PLENTIFUL SUPPLY OF
MOISTURE WILL CREATE CONDITIONS FAVORABLE FOR STRONG THUNDERSTORMS
ALONG WITH SIGNIFICANT RAINFALL FOR ALMOST ANYWHERE IN UTAH THIS
AFTERNOON AND EVENING.

SOME OF THESE THUNDERSTORMS WILL BE SLOW MOVING.  RAINFALL AMOUNTS OF
THREE-QUARTERS OF AN INCH OF RAIN OR MORE IN A SHORT PERIOD OF TIME
COULD CAUSE SOME SMALL STREAM AND URBAN FLOODING.  IN ADDITION...SOME
OF THE STRONGER THUNDERSTORMS WILL BE ACCOMPANIED BY BRIEF GUSTY
WINDS IN THE 40-45 MPH RANGE...FREQUENT LIGHTNING AND HAIL.

STRONG THUNDERSTORMS HAVE ALREADY DEVELOPED OVER AREAS OF UTAH THIS
AFTERNOON TO INCLUDE THE EXTREME NORTH...WEST CENTRAL AND SOUTH
CENTRAL PORTIONS.

STAY TUNED TO RADIO...TV...CABLE TV...OR NOAA WEATHER RADIO FOR
UPDATES ON THIS DEVELOPING WEATHER SITUATION.

ERC...1855Z

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 8, 1:49 PM MDT	Severe Thunderstorm Warning	SLC	Garfield, Iron	61 min
Sep 8, 5:44 PM MDT	Flash Flood Warning	SLC	Garfield, Iron	91 min

Nearby

Flash Flood Warnings in Utah, 1997 Every flash flood 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.