Alert archive / Utah / Flash Flood Warnings in 1987
Flash Flood Warning 1, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Aug 7, 1987, 7:35 PM MDT for Iron County, Utah. It was in force for 115 min.
The area
The counties it named.
The facts
- Issued
- Aug 7, 1987, 7:35 PM MDT (01:35 UTC)
- Expired
- Aug 7, 1987, 9:30 PM MDT
- In force
- 115 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Whole counties
County Iron 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
Ely/Yelland Fld, NV (KELY), launched 00:00Z, 1.6 hours before the alert went out and 205 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
- 2864 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 49 m²/s²
- 0-3 km storm-relative helicity
- 107 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 080135
FFWSLC
UTC021-080330-
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
735 PM MDT FRI AUG 7 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 930 PM MDT FOR PEOPLE IN THE FOLLOWING COUNTY...
IN SOUTHWEST UTAH
...EASTERN IRON
THE UTAH HIGHWAY PATROL HAS REPORTED FLASH FLOODING OCCURRING IN
PAROWAN AND PARAGONAH CANYONS.
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING.
MOST FLASH FLOOD DEATHS 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. TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.
FURTHER STATEMENTS WILL BE ISSUED AS NECESSARY.
ERC 08/0143ZWhat 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, Aug 7, 5:25 PM MDT, 2 hours 10 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY 520 PM MDT FRI AUG 7 1987 ...HEAVY THUNDERSTORM ACTIVITY EXPECTED OVER MUCH OF SOUTHERN UTAH THIS EVENING... AT 445 PM SATELLITE IMAGERY INDICATED HEAVY THUNDERSTORMS WERE DEVELOP- ING OVER MUCH OF SOUTHWEST UTAH AND MOVING EASTWARD. THE MAIN ACTIVITY APPEARED TO BE OCCURRING OVER MILLARD...NORTHEAST IRON...AND NORTHWEST GARFIELD COUNTIES. AT ABOUT 445 PM THE UHP REPORTED THAT JUST SOUTH OF BEAVER HAIL ACCUMULATED UP TO 4 INCHES DEEP. THE HAIL MEASURED UP TO 1/2 INCH IN DIAMETER. THESE THUNDERSTORMS WILL BRING LOCALLY HEAVY RAINFALL...SMALL HAIL... AND POSSIBLY STRONG GUSTY WINDS TO MUCH OF SOUTHERN UTAH THROUGH THIS EVENING. THOSE IN SOUTHERN UTAH SHOULD BE ALERT FOR AREAS OF HEAVY SHOWERS AND LIGHTNING. VERY LOCALIZED FLASH FLOODING IS POSSIBLE IN FLOOD PRONE AREAS SUCH AS DIPS AND WASHES THROUGH THE MORNING HOURS. FURTHER STATEMENTS WILL BE ISSUED AS NEED6ED. ERC...07/2322Z
Nearby
Flash Flood Warnings in Utah, 1987Every flash flood warning in 1987
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.