Alert archive / Utah / Flash Flood Warnings in 1994
Flash Flood Warning 2, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Jul 21, 1994, 6:03 PM MDT for Washington County, Utah. It was in force for 117 min.
The area
The counties it named.
The facts
- Issued
- Jul 21, 1994, 6:03 PM MDT (00:03 UTC)
- Expired
- Jul 21, 1994, 8:00 PM MDT
- In force
- 117 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Whole counties
County Washington County, UT
The nearest sounding before it
Mercury/Desert R, NV (KDRA), launched 00:00Z, 0.1 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.
- Mixed-layer CAPE
- 963 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 2628 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- -22 m²/s²
- 0-3 km storm-relative helicity
- -23 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 220009 COR FFWSLC UTC053-220200- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SALT LAKE CITY UT 603 PM MDT THU JUL 21 1994 THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 800 PM MDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHWEST UTAH ...SOUTHERN AND EASTERN WASHINGTON COUNTY A SPOTTER IN HURRICANE (NORTHEAST OF ST. GEORGE) REPORTED EIGHT TENTHS /.80/ OF AN INCH OF RAIN IN 20 MINUTES. FLOODING WAS REPORTED IN THE HURRICANE AREA. THIS STORM IS COMING FROM ZION NATIONAL PARK (EASTERN WASHINGTON COUNTY). PARK RANGERS REPORT HEAVY RAIN AND HAIL THROUGHOUT MUCH OF THE PARK. PERSONS IN ZION NP AND ALONG THE VIRGIN RIVER BETWEEN THE PARK AND ST. GEORGE SHOULD MOVE TO HIGHER GROUND AWAY FROM THE WATERWAY IMMEDIATELY. 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.
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 21, 3:43 PM MDT, 2 hours 20 minutes before
UTZ006-007-011-220000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 345 PM MDT THU JUL 21 1994 ...THUNDERSTORMS DEVELOPING IN SOUTHERN UTAH... AT 330 PM THUNDERSTORMS HAVE DEVELOP OVER MOST OF SOUTHERN UTAH THIS AFTERNOON. A FEW HEAVY SHOWERS HAVE ACCOMPANIED THESE THUNDERSTORMS ESPECIALLY IN SOUTHWEST UTAH THIS AFTERNOON. AT 310 PM PAROWAN ALONG INTERSTATE 15 IN IRON COUNTY...4 TENTHS OF INCH OF RAIN FELL IN 15 MINUTES. HOWEVER NO FLOODING OR DAMAGE ACCOMPANIED THIS STORM. BRYCE CANYON ALSO HAD A THUNDERSTORM EARLIER AND RECEIVED .02 INCH OF RAIN. HEAVIER CELLS ARE ALSO REPORTED WEST OF FILLMORE. THE INTENSITY OF THESE THUNDERSTORMS IS SUCH THAT THEY ARE LIKELY TO PRODUCE WIND GUSTS TO 50 MPH...BRIEF HEAVY RAINFALL...AND DANGEROUS LIGHTNING. RESIDENTS AND TRAVELERS IN SOUTHERN UTAH SHOULD PAY ATTENTION TO THE WEATHER AND SEEK SHELTER AS THUNDERSTORMS APPROACH. STAY TUNED TO NOAA WEATHER RADIO OR TO YO<U LOCAL TELEVISION AND RADIO STATIONS FOR UPDATES ON THIS DEVELOPING STORM SYSTEM. SIU...2140Z.
Special weather statement, Jul 21, 3:45 PM MDT, 2 hours 18 minutes before
UTZ006-007-011-220000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 345 PM MDT THU JUL 21 1994 ...THUNDERSTORMS DEVELOPING IN SOUTHERN UTAH... AT 330 PM THUNDERSTORMS HAVE DEVELOP OVER MOST OF SOUTHERN UTAH THIS AFTERNOON. A FEW HEAVY SHOWERS HAVE ACCOMPANIED THESE THUNDERSTORMS ESPECIALLY IN SOUTHWEST UTAH THIS AFTERNOON. AT 310 PM PAROWAN ALONG INTERSTATE 15 IN IRON COUNTY...4 TENTHS OF INCH OF RAIN FELL IN 15 MINUTES. HOWEVER NO FLOODING OR DAMAGE ACCOMPANIED THIS STORM. BRYCE CANYON ALSO HAD A THUNDERSTORM EARLIER AND RECEIVED .02 INCH OF RAIN. HEAVIER CELLS ARE ALSO REPORTED WEST OF FILLMORE. THE INTENSITY OF THESE THUNDERSTORMS IS SUCH THAT THEY ARE LIKELY TO PRODUCE WIND GUSTS TO 50 MPH...BRIEF HEAVY RAINFALL...AND DANGEROUS LIGHTNING. RESIDENTS AND TRAVELERS IN SOUTHERN UTAH SHOULD PAY ATTENTION TO THE WEATHER AND SEEK SHELTER AS THUNDERSTORMS APPROACH. STAY TUNED TO NOAA WEATHER RADIO OR TO YOU LOCAL TELEVISION AND RADIO STATIONS FOR UPDATES ON THIS DEVELOPING STORM SYSTEM. SIU...2140Z.
Special weather statement, Jul 21, 5:50 PM MDT, 13 minutes before
UTZ006-007-220100-
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
550 PM MDT THU JUL 21 1994
...STRONG THUNDERSTORMS IN WEST CENTRAL UTAH...
AT 530 PM, SATELLITE IMAGERY INDICATED STRONG THUNDERSTORMS
DEVELOPING RAPIDLY IN THE WESTERN PORTIONS OF MILLARD AND BEAVER
COUNTIES. THE STRONGEST STORMS APPEARED TO BE ALONG THE BEAVER
/MILLARD COUNTY LINE AND WERE MOVING TO THE NORTH AT AROUND
15 MPH.
WEATHER SPOTTERS IN THE AREA REPORT WIND GUSTS TO 45 MPH WITH THESE
STORMS. SPOTTERS ALSO REPORT NEW RANGE FIRES HAVE RESULTED FROM THE
FREQUENT CLOUD-TO-GROUND LIGHTNING AND MINIMAL AMOUNTS OF RAIN
ASSOCIATED WITH THE STORMS.
THE AREA RECEIVING THE WINDS AND LIGHTNING IS MOSTLY REMOTE RANGELAND
WITH FEW IMPROVED ROADWAYS. PERSONS TRAVELING ON THESE ROADS NEED TO
WATCH FOR STRONG THUNDERSTORM WINDS THAT CAN REDUCE VISIBILITIES IN
BLOWING DUST. ALSO, IT IS LIKELY A NUMBER OF NEW RANGEFIRE HAVE
STARTED. AVOID ENTERING AREAS WHERE SMOKE IS PRESENT AS THE FIRE(S)
COULD MOVE IN A FAST, ERRATIC MANNER WHICH WOULD MAKE THEM EXTREMELY
DANGEROUS.
MCC...2350ZSpecial weather statement, Jul 21, 5:53 PM MDT, 10 minutes before
UTZ006-007-220100-
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
550 PM MDT THU JUL 21 1994
...STRONG THUNDERSTORMS IN WEST CENTRAL UTAH...
AT 530 PM, SATELLITE IMAGERY INDICATED STRONG THUNDERSTORMS
DEVELOPING RAPIDLY IN THE WESTERN PORTIONS OF MILLARD AND BEAVER
COUNTIES. THE STRONGEST STORMS APPEARED TO BE ALONG THE BEAVER
/MILLARD COUNTY LINE AND WERE MOVING TO THE NORTH AT AROUND
15 MPH.
WEATHER SPOTTERS IN THE AREA REPORT WIND GUSTS TO 45 MPH WITH THESE
STORMS. SPOTTERS ALSO REPORT NEW RANGE FIRES HAVE RESULTED FROM THE
FREQUENT CLOUD-TO-GROUND LIGHTNING AND MINIMAL AMOUNTS OF RAIN
ASSOCIATED WITH THE STORMS.
THE AREA RECEIVING THE WINDS AND LIGHTNING IS MOSTLY REMOTE RANGELAND
WITH FEW IMPROVED ROADWAYS. PERSONS TRAVELING ON THESE ROADS NEED TO
WATCH FOR STRONG THUNDERSTORM WINDS THAT CAN REDUCE VISIBILITIES IN
BLOWING DUST. ALSO, IT IS LIKELY A NUMBER OF NEW RANGEFIRE HAVE
START"ED. AVOID ENTERING AREAS WHERE SMOKE IS PRESENT AS THE FIRE(S)
COULD MOVE IN A FAST, ERRATIC MANNER WHICH WOULD MAKE THEM EXTREMELY
DANGEROUS.
MCC...2350ZNearby
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.