Alert archive / Utah / Flash Flood Warnings in 1993
Flash Flood Warning 2, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Aug 10, 1993, 4:40 PM MDT for Utah County, Utah. It was in force for 60 min.
The area
The counties it named.
The facts
- Issued
- Aug 10, 1993, 4:40 PM MDT (22:40 UTC)
- Expired
- Aug 10, 1993, 5:40 PM MDT
- In force
- 60 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Whole counties
County Utah County, UT
The nearest sounding before it
Salt Lake City I, UT (KSLC), launched 12:00Z, 10.7 hours before the alert went out and 76 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
- 138 J/kg
- Mixed-layer CIN
- -238 J/kg
- Mixed-layer LCL
- 1828 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 92 m²/s²
- 0-3 km storm-relative helicity
- 117 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 102243 FFWSLC UTC049-055-102340- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SALT LAKE CITY UT 440 PM MDT TUE AUG 10 1993 THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 530 PM MDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN CENTRAL UTAH ...NORTHERN UTAH COUNTY IN SOUTH CENTRAL UTAH ...EAST CENTRAL WAYNE COUNTY HEAVY THUNDERSTORMS IN NORTHERN UTAH COUNTY HAS CAUSED LOCAL FLOODING OF STREETS AND ROADWAYS. RAINFALL REPORTS RECEIVED WERE 1.03 IN 15 MINUTES IN LEHI AND .62 OF AN INCH IN 15 MINUTES IN AMERICAN FORK. THESE THUNDERSTORMS ARE MOVING TO THE NORTHEAST AT 35 MPH AND WILL BE AFFECTING THE NORTHERN END OF UTAH COUNTY INCLUDING THE CITIES OF LEHI...ALPINE...HIGHLAND...AMERICAN FORK AND AMERICAN FORK CANYON. IN SOUTH CENTRAL UTAH THE HIGHWAY PATROL REPORTS WATER RUNNING OVER THE ROAD ON STATE ROUTE 95 ABOUT 4 MILES SOUTH OF HANKSVILLE. THUNDERSTORMS IN THE AREA ARE MOVING NORTHEAST AT 35 MPH AND WILL AFFECT THOSE PEOPLE TRAVELING ON STATE ROUTE 95 AND CAMPERS AND HIKERS IN NEAR THE MUDDY AND DIRTY DEVIL RIVERS IN EASTERN WAYNE COUNTY. A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS IMMINENT. 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 NEEDED. SMITH...2241Z &
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, Aug 10, 2:11 PM MDT, 2 hours 29 minutes before
UTZALL-102030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 220 PM MDT TUE AUG 10 1993 ...STRONG THUNDERSTORMS DEVELOPING OVER WESTERN UTAH... STRONG THUNDERSTORMS ARE DEVELOPING OVER WESTERN UTAH THIS AFTERNOON. THESE STORMS ARE PRODUCING LOCAL AREAS OF HEAVY RAIN AND FREQUENT LIGHTNING. ONE HALF INCH OF RAIN IN TEN MINUTES WAS REPORTED NEAR DELTA AROUND 1 PM THIS AFTERNOON. LIGHTNING DETECTION EQUIPMENT INDICATES NUMEROUS LIGHTNING STRIKES WITH THESE STORMS...WITH SOME THUNDERSTORMS PRODUCING NEARLY 2 STRIKES PER MINUTE. THUNDERSTORMS WILL CONTINUE TO DEVELOP THIS AFTERNOON AND CONTINUE AFTER DARK. IF THUNDERSTORMS APPROACH...SEEK SHELTER INDOORS. BEWARE OF~ LIGHTNING WHICH IS UTAHS BIGGEST WEATHER RELATED KILLER. FURTHER STATEMENTS WILL BE ISSUED AS NEEDED. LBD 2010 UTC
Special weather statement, Aug 10, 2:20 PM MDT, 2 hours 20 minutes before
UTZALL-102030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 220 PM MDT TUE AUG 10 1993 ...STRONG THUNDERSTORMS DEVELOPING OVER WESTERN UTAH... STRONG THUNDERSTORMS ARE DEVELOPING OVER WESTERN UTAH THIS AFTERNOON. THESE STORMS ARE PRODUCING LOCAL AREAS OF HEAVY RAIN AND FREQUENT LIGHTNING. ONE HALF INCH OF RAIN IN TEN MINUTES WAS REPORTED NEAR DELTA AROUND 1 PM THIS AFTERNOON. LIGHTNING DETECTION EQUIPMENT INDICATES NUMEROUS LIGHTNING STRIKES WITH THESE STORMS...WITH SOME THUNDERSTORMS PRODUCING NEARLY 2 STRIKES PER MINUTE. THUNDERSTORMS WILL CONTINUE TO DEVELOP THIS AFTERNOON AND CONTINUE AFTER DARK. IF THUNDERSTORMS APPROACH...SEEK SHELTER INDOORS. BEWARE OF LIGHTNING WHICH IS UTAHS BIGGEST WEATHER RELATED KILLER. FURTHER STATEMENTS WILL BE ISSUED AS NEEDED. LBD 2010 UTC
Special weather statement, Aug 10, 3:55 PM MDT, 45 minutes before
UTZALL-110000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 355 PM MDT TUE AUG 10 1993 ...HEAVY RAINFALL AND HAIL IN THE SALT LAKE VALLEY... STRONG THUNDERSTORMS HAVE DROPPED HEAVY RAIN AND SMALL HAIL IN THE SALT LAKE VALLEY. SINCE 3 PM MDT NUMEROUS REPORTS OF BETWEEN ONE THIRD AND ONE HALF INCHES OF RAIN HAVE BEEN RECEIVED WITH GREATER AMOUNTS IN THE SOUTH END OF THE VALLEYS. IN SOUTH JORDAN ONE INCH OF RAIN WAS REPORTED IN 15 MINUTES WHILE IN RIVERTON /.70/ FELL IN THE SAME TIME PERIOD. HAIL REPORTS RANGED FROM 1/4 INCH DIAMETER UP TO 5/8 INCH DIAMETER NEAR LITTLE COTTONWOOD CANYON. THESE THUNDERSTORMS WILL CONTINUE ACROSS UTAH THE REST OF THIS EVENING. PERSONS EXPERIENCING THESE STORMS CAN EXPECT HEAVY RAIN...HAIL AND FREQUENT CLOUD-TO-GROUND LIGHTNING. IF A STORM APPROACHES THE BEST SHELTER IS INDOORS AWAY FROM WINDOWS. AVOID OPEN AREAS OR TALL.. ISOLATED TREES TO PREVENT BEING STRUCK BY LIGHTNING. MCC...2155Z
Special weather statement, Aug 10, 3:56 PM MDT, 44 minutes before
UTZALL-110000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 355 PM MDT TUE AUG 10 1993 ...HEAVY RAINFALL AND HAIL IN THE SALT LAKE VALLEY... STRONG THUNDERSTORMS HAVE DROPPED HEAVY RAIN AND SMALL HAIL IN THE SALT LAKE VALLEY. SINCE 3 PM MDT NUMEROUS REPORTS OF BETWEEN ONE THIRD AND ONE HALF INCHES OF RAIN HAVE BEEN RECEIVED WITH GREATER AMOUNTS IN THE SOUTH END OF THE VALLEYS. IN SOUTH JORDAN ONE INCH OF RAIN WAS REPORTED IN 15 MINUTES WHILE IN RIVERTON /.70/ FELL IN THE SAME TIME PERIOD. HAIL REPORTS RANGED FROM 1/4 INCH DIAMETER UP TO 5/8 INCH DIAMETER NEAR LITTLE COTTONWOOD CANYON. THESE THUNDERSTORMS WILL CONTINUE ACROSS UTAH THE REST OF THIS EVENING. PERSONS EXPERIENCING THESE STORMS CAN EXPECT HEAVY RAIN...HAIL AND FREQUENT CLOUD-TO-GROUND LIGHTNING. IF A STORM APPROACHES THE BEST SHELTER IS INDOORS AWAY FROM WINDOWS. AVOID OPEN AREAS OR TALL.. ISOLATED TREES TO PREVENT BEING STRUCK BY LIGHTNING. MCC...2155Z
The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 8:10 PM MDT | Flash Flood Warning | SLC | Wayne | 110 min |
| Aug 10, 4:40 PM MDT | Flash Flood Warning | SLC | Wayne | 60 min |
Nearby
Flash Flood Warnings in Utah, 1993Every flash flood warning in 1993
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.