Alert archive / Utah / Flash Flood Warnings in 1999

Flash Flood Warning 9, NWS Salt Lake City, UT

July 14, 1999Carbon County, Emery County, Utah

NWS Salt Lake City, UT issued this flash flood warning at Jul 14, 1999, 2:41 PM MDT for Carbon County, Emery County, Utah. It was in force for 34 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 14, 1999, 2:41 PM MDT (20:41 UTC)
Expired
Jul 14, 1999, 3:15 PM MDT
In force
34 min
Issued by
NWS Salt Lake City, UT
Area
Whole counties

Counties Carbon County, UT, Emery County, UT

The nearest sounding before it

Grand Junction, CO (KGJT), launched 12:00Z, 8.7 hours before the alert went out and 186 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, Grand Junction, CO at 12:00Z on 1999-07-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Grand Junction, CO at 12:00Z on 1999-07-14The 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2355 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
-4 m²/s²
0-3 km storm-relative helicity
72 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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.

NWS Salt Lake City, UT wrote its last area forecast discussion before this flash flood warning went out at Jul 14, 9:30 AM MDT, 5 hours 11 minutes earlier.

Area forecast discussion, Jul 14, 9:30 AM MDT, 5 hours 11 minutes before
UTAH AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UTAH
930 AM MDT WED JUL 14 1999

SYNOPSIS...TROPICAL MOISTURE WILL COVER MOST OF UTAH TODAY FOR
WIDESPREAD SHOWERS AND THUNDERSTORMS...SOME WITH HEAVY RAIN. A COLD
FRONT WILL PUSH INTO UTAH TONIGHT THEN STALL OVER THE NORTH PORTION.
DRY AND SOMEWHAT COOLER WEATHER WILL BE NORTH OF THE FRONT THURSDAY
WHILE SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE TO THE SOUTH.

DISCUSSION...TWO SHORT WAVES TO AFFECT CWFA TODAY.  BOTH BEST
CORRESPOND TO 12Z RUN OF RUC WITH 300MB VORTICITY.  ONE EAST OF RNO
TO MOVE INTO NORTHWEST UTAH BY 00Z.  ONE IN SOUTHWEST UTAH TO SWEEP
ACROSS STATE AND BE NEAR VEL BY 00Z.  BOTH PROMISE TO LIFT MOIST
AIRMASS AND MAKE FOR ACTIVE DAY.

SLC 771  CDC 853

.SLC...FLASH FLOOD WATCH NOON TIL 8PM MOST OF CFWA EXCEPT NW AND SW
CORNERS.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 14, 2:41 PM MDTFlash Flood WarningSLCCarbon, Emery2 hr

Nearby

Flash Flood Warnings in Utah, 1999Every flash flood warning in 1999

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.