Alert archive / Utah / Flash Flood Warnings in 1989

Flash Flood Warning 1, NWS Salt Lake City, UT

January 1, 1989Washington County, Utah

NWS Salt Lake City, UT issued this flash flood warning at Jan 1, 1989, 3:05 AM MST for Washington County, Utah. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
Jan 1, 1989, 3:05 AM MST (10:05 UTC)
Expired
Jan 1, 1989, 9:00 AM MST
In force
6 hr
Issued by
NWS Salt Lake City, UT
Area
Whole counties

County Washington County, UT

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Mercury/Desert R, NV (KDRA), launched 00:00Z, 10.1 hours before the alert went out and 234 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, Mercury/Desert R, NV at 00:00Z on 1989-01-01Temperature 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, Mercury/Desert R, NV at 00:00Z on 1989-01-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -58 square meters per square second.1939587897Sfc1 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
1945 m above ground
0-6 km bulk shear
67 kt
0-1 km storm-relative helicity
-58 m²/s²
0-3 km storm-relative helicity
48 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.

In the hours before

Special weather statement, Dec 31, 9:09 PM MST, 5 hours 56 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY
910 PM MST SAT DEC 31 1988

  ...SNOW ADVISORY FOR PORTIONS OF NORTHERN UTAH TONIGHT...

THE NATIONAL WEATHER SERVICE HAS ISSUED A SNOW ADVISORY COVERING THE
NORTHERN WASATCH FRONT AND THE CACHE VALLEY FOR TONIGHT. THIS INCLUDES
DAVIS...WEBER...CACHE AND EASTERN BOX ELDER COUNTIES.

A MOIST SOUTHERLY FLOW OVER UTAH IS COLLIDING WITH A WESTERLY FLOW
MOVING THROUGH SOUTHERN IDAHO. THIS COLLISION OF AIR MASSES HAS
ALREADY CAUSED 2 TO 4 INCHES OF SNOW ACROSS PORTIONS OF EXTREME
NORTHERN UTAH DURING THE LATE AFTERNOON AND EVENING. BRIGHAM CITY
AND LOGAN RECEIVED 6 TO 8 INCHES. ADDITIONAL ACCUMULATION OF 3 TO 5
INCHES ARE LIKELY THE REST OF TONIGHT.

EXTRA CAUTION AND PEAK ALERTNESS ARE ADVISED FOR TRAVELING TONIGHT
DUE TO THE SLICK ROADWAYS.

MCC/DDH...0410Z

Nearby

Flash Flood Warnings in Utah, 1989Every flash flood warning in 1989

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.