Alert archive / Utah / Flash Flood Warnings in 1994
Flash Flood Warning 12, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Aug 19, 1994, 3:58 PM MDT for Emery County, Utah. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Aug 19, 1994, 3:58 PM MDT (21:58 UTC)
- Expired
- Aug 19, 1994, 7:00 PM MDT
- In force
- 3 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Whole counties
County Emery County, UT
The nearest sounding before it
Grand Junction, CO (KGJT), launched 12:00Z, 10.0 hours before the alert went out and 191 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
- 76 J/kg
- Mixed-layer CIN
- -205 J/kg
- Mixed-layer LCL
- 1450 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- 178 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 192210 FFWSLC UTC015-200100- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SALT LAKE CITY UT 358 PM MDT FRI AUG 19 1994 THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 700 PM MDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN EAST CENTRAL UTAH ...SOUTHERN EMERY COUNTY AT 355 PM THE UTAH HIGHWAY PATROL STATION AT RICHFIELD REPORTED FLASH FLOODING 30 MILES NORTHWEST OF HANKSVILLE UTAH. FLOOD WATERS WERE APPARENTLY MOVING TOWARD INTERSTATE 70 APPROXIMATELY 35-50 MILES WEST SOUTHWEST OF GREEN RIVER UTAH. THE THUNDERSTORMS PRODUCING FLASHFLOODING OVER THE AREAS WERE MOVING EASTWARD AT 10-15 MPH. LOW LYING AREAS INCLUDE THE SAN RAFAEL SWELL AND MUDDY RIVER COULD BE AFFECTED BY FLASH FLOODING AS WELL STRETCHES OF INTERSTATE 70, APPROXIMATELY 25 MILES TO 50 MILES WEST OF GREEN RIVER. 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. SIU 2209Z &
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 19, 10:30 AM MDT, 5 hours 28 minutes before
UTZALL-191600-
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1030 AM MDT FRI AUG 19 1994
...THUNDERSTORMS WITH HEAVY RAIN POSSIBLE OVER UTAH TODAY...
THE MOIST AND UNSTABLE AIRMASS OVER UTAH WILL AGAIN PRODUCE
THUNDERSTORMS OVER MUCH OF UTAH TODAY. SHOWERS AND THUNDERSTORMS
HAVE ALREADY FORMED OVER EXTREME SOUTHWESTERN SECTIONS OF THE STATE
IN ADVANCE OF AN UPPER LEVEL WEATHER DISTURBANCE OVER SOUTHERN
NEVADA. THIS DISTURBANCE WILL ROLL EASTWARD THROUGH UTAH DURING THE
DAY AND EXIT THE STATE TONIGHT.
THE THUNDERSTORMS CURRENTLY OVER EXTREME SOUTHWEST UTAH EARLIER HAVE
DISSAPATED BUT AN AREA OF THUNDERSTORMS OVER EXTREME NORTHWEST
ARIZONA REMAINS ACTIVE. AT THE SAME TIME LOOK FOR THUNDERSTORMS TO
REDEVELOP OVER UTAH THIS AFTERNOON WITH LOCAL HEAVY RAIN POSSIBLE
EAST OF LINE FROM VERNAL TO ST GEORGE AND A THREAT OF FLASH FLOODING
IN SOUTHEAST UTAH EAST OF LINE FROM KANAB TO GRAND JUNCTION COLORADO.
BY EVENING MOST OF THE ACTIVITY WILL HAVE ENDED OR MOVED OUT OF THE
STATE.
THE POTENTIAL EXISTS FOR ANY OF TODAY'S THUNDERSTORM TO PRODUCE BRIEF
HEAVY RAIN, SMALL HAIL AND GUSTY WINDS. HOWEVER ANY FLOODING WILL BE
MINOR AND LOCALIZED.
PERSONS PLANNING OUTDOOR ACTIVITIES TODAY NEED TO KEEP AN EYE OUT FOR
RAPIDLY CHANGING WEATHER CONDITIONS. THIS IS ESPECIALLY TRUE IN THE
CANYON COUNTRY WHERE FLASH FLOODING CAN STRIKE QUICKLY AND WITHOUT
WARNING. STAY TUNED TO LOCAL RADIO, TELEVISION OR NOAA WEATHER RADIO
FOR UPDATES ON TODAY'S WEATHER.
SIU...1625Z.Special weather statement, Aug 19, 10:31 AM MDT, 5 hours 27 minutes before
UTZALL-191600-
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1030 AM MDT FRI AUG 19 1994
...THUNDERSTORMS WITH HEAVY RAIN POSSIBLE OVER UTAH TODAY...
THE MOIST AND UNSTABLE AIRMASS OVER UTAH WILL AGAIN PRODUCE
THUNDERSTORMS OVER MUCH OF UTAH TODAY. SHOWERS AND THUNDERSTORMS
HAVE ALREADY FORMED OVER EXTREME SOUTHWESTERN SECTIONS OF THE STATE
IN ADVANCE OF AN UPPER LEVEL WEATHER DISTURBANCE OVER SOUTHERN
NEVADA. THIS DISTURBANCE WILL ROLL EASTWARD THROUGH UTAH DURING THE
DAY AND EXIT THE STATE TONIGHT.
THE THUNDERSTORMS CURRENTLY OVER EXTREME SOUTHWEST UTAH EARLIER HAVE
DISSAPATED BUT AN AREA OF THUNDERSTORMS OVER EXTREME NORTHWEST
ARIZONA REMAINS ACTIVE. AT THE SAME TIME LOOK FOR THUNDERSTORMS TO
REDEVELOP OVER UTAH THIS AFTERNOON WITH LOCAL HEAVY RAIN POSSIBLE
EAST OF LINE FROM VERNAL TO ST GEORGE AND A THREAT OF FLASH FLOODING
IN SOUTHEAST UTAH EAST OF LINE FROM KANAB TO GRAND JUNCTION COLORADO.
BY EVENING MOST OF THE ACTIVITY WILL HAVE ENDED OR MOVED OUT OF THE
STATE.
THE POTENTIAL EXISTS FOR ANY OF TODAY'S THUNDERSTORM TO PRODUCE BRIEF
HEAVY RAIN, SMALL HAIL AND GUSTY WINDS. HOWEVER ANY FLOODING WILL BE
MINOR AND LOCALIZED.
PERSONS PLANNING OUTDOOR ACTIVITIES TODAY NEED TO KEEP AN EYE OUT FOR
RAPIDLY CHANGING WEATHER CONDITIONS. THIS IS ESPECIALLY TRUE IN THE
CANYON COUNTRY WHERE FLASH FLOODING CAN STRIKE QUICKLY AND WITHOUT
WARNING. STAY TUNED TO LOCAL RADIO, TELEVISION OR\ NOAA WEATHER RADIO
FOR UPDATES ON TODAY'S WEATHER.
SIU...1625Z.The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 7:17 PM MDT | Flash Flood Warning | SLC | Sevier | 58 min |
Nearby
Flash Flood Warnings in Utah, 1994Every flash flood warning in 1994
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.