Flash Flood Warning 46, NWS Salt Lake City, UT

000 
WGUS75 KSLC 052237
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
435 PM MDT THU OCT 5 2006

UTC017-025-055-060145-
GARFIELD UT-WAYNE UT-KANE UT-
435 PM MDT THU OCT 5 2006

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 PM MDT FOR
CENTRAL KANE...WESTERN WAYNE AND CENTRAL GARFIELD COUNTIES...

AT 418 PM MDT...FLASH FLOODING WAS REPORTED OVER A WIDE AREA NEAR 
THE SOUTHERN HALF OF CAPITOL REEF NATIONAL PARK...EASTERN GRAND 
STAIRCASE ESCALANTE NATIONAL MONUMENT...AND THE NORTHWESTERN EDGE OF 
GLEN CANYON RECREATION AREA.

IN ADDITION TO FLASH FLOODING TO NUMEROUS SMALL DRAINAGES...WAHWEAP 
DRAINAGE...WHICH FLOWS SOUTHWARD FROM GARFIELD COUNTY INTO WESTERN 
LAKE POWELL HAS EXPERIENCED A FLASH FLOOD ESTIMATED TO FLOW AT OVER 
3000 CUBIC FEET PER SECOND (CFS). THIS FLOW IS EXPECTED TO INCREASE 
IN VOLUME THROUGH THE LATE AFTERNOON HOURS. 

MULTIPLE ROADS ACROSS THE MONUMENT AND SOUTHERN CAPITOL REEF 
NATIONAL PARK AREA HAVE BEEN FLOODED AND CLOSED.  SMALL GROUPS OF 
VISITORS TO THE AREA HAVE BEEN TEMPORARILY STRANDED DUE TO EITHER 
ROAD DAMAGE OR FLOWING WATER.

AS OF THURSDAY EVENING...THE RAIN CONTINUES...WITH ADDITIONAL 
AMOUNTS FORECASTED THROUGH FRIDAY EVENING.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO TORREY...
TEASDALE...HENRIEVILLE...ESCALANTE...CAPITOL REEF NP...BOULDER AND
BICKNELL

LAT...LON 3704 11232 3703 11161 3705 11128 3717 11103
      3844 11093 3849 11149

$$

MCINERNEY

000 
WGUS75 KSLC 060136
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
735 PM MDT THU OCT 5 2006

UTC017-025-055-060145-
GARFIELD UT-WAYNE UT-KANE UT-
735 PM MDT THU OCT 5 2006

...THE FLASH FLOOD WARNING FOR CENTRAL KANE...WESTERN WAYNE AND 
CENTRAL GARFIELD COUNTIES HAS BEEN ALLOWED TO EXPIRE...

THE RAINFALL THAT CAUSED THE FLASH FLOOD EVENTS THIS AFTERNOON HAS 
DIMINISHED.  ADDITIONALLY...FLOOD WATERS HAVE TERMINATED AT LAKE 
POWELL AND ARE NO LONGER A MAJOR THREAT.  AS A RESULT...THE FLASH 
FLOOD WARNING HAS BEEN ALLOWED TO EXPIRE.

ALTHOUGH THE FLOOD WATERS HAVE SIGNIFICANTLY DECLINED...THERE IS A 
CHANCE THAT ADDITIONAL RAINFALL DURING THE NIGHTTIME HOURS MAY 
TEMPORARILY INCREASE STREAMFLOWS IN THE AREA.  

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE 
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE 
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS 
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

LAT...LON 3704 11232 3703 11161 3705 11128 3717 11103
      3844 11093 3849 11149

$$

MCINERNEY

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1041 AM MDT THU OCT 5 2006

.SYNOPSIS...A LARGE STORM OVER CALIFORNIA WILL BRING STRONG AND
MOIST SOUTHERLY FLOW TO UTAH THROUGH FRIDAY. THE SYSTEM WILL LIFT
ACROSS THE GREAT BASIN FRIDAY AFTERNOON AND EVENING.

&&

.DISCUSSION...SHOWERS AND THUNDERSTORMS ARE DEVELOPING OVER MUCH
OF THE STATE AND COVERAGE WILL INCREASE DURING THE DAY. BAND OF
PRECIPITATION OVER SOUTHWESTERN UTAH IS TRACKING QUICKLY INTO THE
WEST DESERTS. WILL UPDATE TO INCREASE POPS OVER THAT AREA. CLOSED LOW
REMAINS CENTERED OFF THE CALIFORNIA COAST THIS MORNING...BUT WILL
DRIFT ONSHORE BEGINNING THIS AFTERNOON. AS IT DOES SO...THE JET
MAX OVER NEVADA WILL MOVE TO THE EAST...RESULTING IN MORE
FAVORABLE DYNAMICS OVER THE AREA TONIGHT AND TOMORROW. AMPLE
MOISTURE IS ALREADY IN PLACE...BUT SUBTROPICAL MOISTURE WILL
CONTINUE TO STREAM IN TODAY. MODELS FORECAST PRECIPITABLE WATER
VALUES AROUND 1 INCH FOR MOST LOCATIONS BY THIS EVENING. WITH
THESE INGREDIENTS IN PLACE...HEAVY RAINFALL IS POSSIBLE OVER THE
AREA...ESPECIALLY IN EAST CENTRAL AND SOUTHERN UTAH WHERE THE
GREATEST MOISTURE IS IN PLACE. FLASH FLOOD WATCH REMAINS IN EFFECT
FOR THOSE AREAS UNTIL FRIDAY AFTERNOON.

THE LOW CONTINUES MOVING INLAND ON FRIDAY...REACHING THE STATE AS
AN OPEN WAVE LATE FRIDAY AFTERNOON. UPPER LEVEL DIVERGENCE WILL
BE STRONGEST AT THIS POINT AND COMBINED WITH STRONG
SHEAR...SEVERE THUNDERSTORMS ARE POSSIBLE. STORM PREDICTION
CENTER HAS PUT MUCH OF UTAH IN A SLIGHT RISK AREA FOR SEVERE
THUNDERSTORMS ON FRIDAY IN THE LATEST CONVECTIVE OUTLOOK. AIRMASS
DRIES OUT FROM THE SOUTH BEGINNING EARLY SATURDAY AS THE TROUGH
EXITS. HOWEVER...MODELS HAVE BEEN CONSISTENT IN PREDICTING THAT A
PIECE OF THE TROUGH WILL BREAK AWAY AND CLOSE OFF OVER SOUTHERN
CALIFORNIA ON SUNDAY. THIS SOLUTION WOULD RETURN MOISTURE TO
SOUTHERN AND CENTRAL UTAH AND COULD RESULT IN MORE WET WEATHER
FOR THE SOUTHERN HALF OF THE STATE.

&&

.HYDROLOGY...FLASH FLOOD WATCH CONTINUES THROUGH FRIDAY AFTERNOON.
MODELS STILL FORECASTING A LARGE AREA OF 2 TO 4 INCH STORM TOTAL
PRECIPITATION OVER SOUTHERN AND EASTERN UTAH. RIVER FORECAST
CENTER HYDRO MODELS INDICATING RESPONSE ON EASTERN AND SOUTHERN
UTAH RIVERS WITH PEAK FLOW BETWEEN 06Z AND 18Z SATURDAY. SMALLER
STREAMS AND WASHES SHOULD SEE RISING WATER BEGINNING THIS EVENING.

&&

.AVIATION...SHOWERS AND THUNDERSTORMS WILL BECOME MORE
NUMEROUS AROUND SLC THIS AFTERNOON...AND WINDS WILL BE ERRATIC IN
THE VICINITY OF THUNDERSTORMS. CEILINGS WILL REMAIN VFR...THOUGH
WILL OCCASIONALLY DIP BELOW 7000 FT IN SHOWERS.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...FLASH FLOOD WATCH UNTIL 6 PM FRIDAY FOR UTZ010-012-013-017>021.

WY...NONE.

&&

TRAPHAGAN/CHENG

FOR MORE INFORMATION FROM NOAA/S NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
627 AM MDT THU OCT 5 2006

UTZ001>021-WYZ021-061300-
CACHE VALLEY/UTAH PORTION-NORTHERN WASATCH FRONT-
SALT LAKE AND TOOELE VALLEYS-SOUTHERN WASATCH FRONT-
GREAT SALT LAKE DESERT AND MOUNTAINS-WASATCH MOUNTAIN VALLEYS-
WASATCH MOUNTAINS I-80 NORTH-WASATCH MOUNTAINS SOUTH OF I-80-
WESTERN UINTA MOUNTAINS-WASATCH PLATEAU/BOOK CLIFFS-
WESTERN UINTA BASIN-CASTLE COUNTRY-SAN RAFAEL SWELL-
SANPETE/SEVIER VALLEYS-WEST CENTRAL UTAH-SOUTHWEST UTAH-
CENTRAL AND SOUTHWEST MOUNTAINS-HENRY MOUNTAINS-
UTAHS DIXIE AND ZION NATIONAL PARK-SOUTH CENTRAL UTAH-
GLEN CANYON RECREATION AREA/LAKE POWELL-SOUTHWEST WYOMING-
627 AM MDT THU OCT 5 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL UTAH...
NORTHERN UTAH...SOUTHERN UTAH AND SOUTHWEST WYOMING.

.DAY ONE...TODAY AND TONIGHT

A MOIST SOUTHERLY FLOW WILL BRING RAIN TO MUCH OF UTAH AND
SOUTHWEST WYOMING THROUGH TONIGHT. THUNDERSTORMS WILL ALSO BE
EMBEDDED IN THE AREAS OF RAINFALL. RAIN MAY BE HEAVY ENOUGH TO
CAUSE FLASH FLOODING ON NORMALLY DRY WASHES AND STREAMS OF
SOUTHERN AND EASTERN UTAH. A FLASH FLOOD WATCH HAS BEEN ISSUED
FOR MUCH OF THE AREA.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

LOCAL HEAVY RAIN IS EXPECTED TO CONTINUE THROUGHOUT THE OUTLOOK
AREA. THE AIRMASS WILL REMAIN WARM...RESTRICTING ANY SNOWFALL TO
THE HIGHEST ELEVATIONS...ABOVE 12000 FEET. ON FRIDAY AFTERNOON
THUNDERSTORMS MAY BECOME SEVERE...WITH LARGE HAIL AND DAMAGING
WINDS POSSIBLE.

RAIN WILL DECREASE ACROSS THE AREA SATURDAY.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

FOR MORE INFORMATION FROM NOAA/S NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)

GIBSON