Alert archive / Utah / Flash Flood Warnings in 1989
Flash Flood Warning 2, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Jul 27, 1989, 5:20 PM MDT for Washington County, Utah. It was in force for 115 min.
The area
The counties it named.
The facts
- Issued
- Jul 27, 1989, 5:20 PM MDT (23:20 UTC)
- Expired
- Jul 27, 1989, 7:15 PM MDT
- In force
- 115 min
- 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 12:00Z, 11.3 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 0 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 38 m²/s²
- 0-3 km storm-relative helicity
- -24 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KSLC 272322
FFWSLC
UTC053-280115-
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
520 PM MDT THU JUL 27 1989
THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 715 PM MDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
IN SOUTHWEST UTAH
...EASTERN WASHINGTON COUNTY
THE UTAH HIGHWAY PATROL REPORTS FLOODING ACROSS HIGHWAY 9 BETWEEN
ROCKVILLE AND SPRINGDALE IN WASHINGTON COUNTY. WATER HAS COVERED THE
ROADWAY IN THIS AREA AND MOTORISTS SHOULD AVOID DRVING INTO THIS
SITUATION. SEVERAL OF THE NORMALLY DRY WASHES THAT FEED THE VIRGIN
RIVER HAVE FILLED TO CAPACITY AND ARE OVERFLOWING.
SPOTTERS IN THE AREA HAVE ALSO REPORTED HEAVY RAIN AND SMALL HAIL.
ONE SPOTTER IN SPRINGDALE RECEIVED 0.90 INCHES OF RAIN IN LESS THAN
HALF AN HOUR.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
CROSS SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY. MOVE TO HIGHER GROUND.
MOST DEATHS IN FLASH FLOODING OCCUR IN AUTOMOBILES. DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS
THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A
SMALL ONE...ON FOOT.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, Jul 27, 5:07 PM MDT, 13 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
505 PM MDT THU JUL 27 1989
...HEAVY THUNDERSTORMS OVER THE SOUTHWEST...
SPOTTERS IN EASTERN WASHINGTON COUNTY INCLUDING ZION NATIONAL PARK HAVE
REPORTED HEAVY RAINFALL FROM A CLUSTER OF THUNDERSTORMS THAT HAS MOVED
NORTHWARD INTO THE STATE. A SPOTTER IN SPRINGDALE RECEIVED 0.90 INCHES
OF RAIN IN LESS THAN 30 MINUTES. SMALL HAIL HAS ACCOMPANIED THE HEAVY
RAINFALL. THE PARK SERVICE IN ZION NATIONAL PARK REPORTED HEAVY
RAINFALL AND SMALL HAIL ALSO. A SMALL ROCK SLIDE HAD OCCURRED OVER ONE
OF THE ROAD WAYS IN THE PARK.
RADAR INDICATES THAT THESE STORMS CONTINUE TO SHOW HEAVY RAINFALL AND
ARE MOVING SLOWLY NORTHWARD. PERSONS DRIVING THROUGH THIS AREA OF THE
STATE... OR INVOLVED IN OUTDOOR ACTIVITIES SHOULD BE PREPARED FOR BRIEF
HEAVY RAINFALL AND SMALL HAIL.
ROCK SLIDES AND ROADWAYS COVERED WITH WATER MAY ALSO BE ENCOUNTERED.
ADDITIONAL STATEMENTS WILL BE ISSUED AS NEEDED.
DMC...2305ZNearby
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.