Flash Flood Warning 15, NWS Salt Lake City, UT

000 
WGUS75 KSLC 062132
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
322 PM MDT WED AUG 6 2008

UTC017-062245-
/O.CON.KSLC.FF.W.0015.000000T0000Z-080806T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GARFIELD UT-
322 PM MDT WED AUG 6 2008

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 445 PM MDT FOR
CENTRAL GARFIELD COUNTY...

AT 315 PM MDT...GRAND STAIRCASE NATIONAL MONUMENT RANGERS REPORTED A 
LARGE FLASH FLOOD CURRENTLY MOVING THROUGH THE UPPER ESCALANTE RIVER 
DRAINAGE INCLUDING THE MAINSTEM ESCALANTE RIVER.  THE FLASH FLOOD 
CONTINUES TO COURSE THROUGH THESE WATERWAYS AND IS EXPECTED TO 
REMAIN A THREAT THROUGH 445 PM THIS AFTERNOON. 

IF YOU ARE HEADING INTO THE ESCALANTE RIVER DRAINAGE FOR THE 
REMAINDER OF THE AFTERNOON...PLEASE USE CAUTION.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

LAT...LON 3771 11124 3770 11128 3760 11171 3763 11186
      3790 11187 3806 11168
TIME...MOT...LOC 2122Z 180DEG 0KT 3780 11169

$$

MCINERNEY

000 
WGUS75 KSLC 062241
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
437 PM MDT WED AUG 6 2008

UTC017-062247-
/O.EXP.KSLC.FF.W.0015.000000T0000Z-080806T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GARFIELD UT-
437 PM MDT WED AUG 6 2008

...THE FLASH FLOOD WARNING WILL EXPIRE AT 445 PM MDT FOR CENTRAL
GARFIELD COUNTY...

RUNOFF FROM EARLIER PRECIPITATION HAS DIMINISHED GREATLY AND FLOWS 
HAVE DECREASED ALONG THE UPPER ESCALANTE RIVER. THE OBSERVED FLASH 
FLOOD WILL CONTINUE TO FLOW DOWN THE ESCALANTE RIVER UNTIL IT 
TERMINATES AT LAKE POWELL.  HOWEVER...THE LARGE FLOWS ARE EXPECTED 
TO ATTENUATE ALONG THE WAY.

GRAND STAIRCASE ESCALANTE MONUMENT RANGERS OBSERVED THE LARGE FLASH 
FLOOD WHICH CARRIED LARGE WOODY DEBRIS AND HAD SIGNIFICANT RISES AND 
CONTRIBUTIONS FROM MANY TRIBUTARIES.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

LAT...LON 3771 11124 3770 11128 3760 11171 3763 11186
      3790 11187 3806 11168
TIME...MOT...LOC 2237Z 180DEG 0KT 3780 11169

$$

MCINERNEY

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1124 AM MDT WED AUG 6 2008

.SYNOPSIS...SUBTROPICAL MOISTURE HAS SPREAD OVER THE AREA AND WILL
REMAIN IN PLACE THROUGH THE END OF THE WEEK. DRIER AIR IS EXPECTED
TO MOVE BACK INTO THE REGION BY EARLY NEXT WEEK.

&&

.DISCUSSION...DEEP MOISTURE REMAINS IN PLACE TODAY ACROSS MOST OF
THE FORECAST AREA. THE 12Z SLC SOUNDING HAD PRECIPITABLE WATER
VALUE OF 1.11 INCHES AND MODELS SHOW PW VALUES AS HIGH AS 1.6
INCHES OVER EASTERN UTAH. THIS MOISTURE...COMBINED WITH A WEAK
CLOSED LOW FORECAST TO MOVE ACROSS THE SAN RAFAEL SWELL THIS
AFTERNOON...IS EXPECTED TO PRODUCE NUMEROUS THUNDERSTORMS THAT
SHOULD BE SIMILAR TO THE EFFICIENT RAINERS SEEN IN SOUTHERN UTAH
YESTERDAY. HAVE ISSUED A FLASH FLOOD WATCH FOR THE SOUTHERN AND
EASTERN PORTIONS OF THE CWA...AS WELL AS ADDED HEAVY RAIN WORDING
TO THE FORECAST IN AREAS IN AND AROUND THE WATCH. THIS MATCHES UP
WELL WITH THE WATCH AND WORDING FROM THE GRAND JUNCTION FORECAST
OFFICE.

IN THE EXTENDED...THE 12Z NAM HAS SOME DRIER AIR MOVING INTO THE
WESTERN HALF OF UTAH DURING THE DAY FRIDAY...WHICH IS SOMEWHAT
FASTER THAN PREVIOUS MODEL RUNS. WILL TAKE A LOOK AT THIS FASTER
SOLUTION...BUT WILL LIKELY KEEP POPS NEAR THEIR CURRENT LEVEL FOR
FRIDAY AND SATURDAY...AS MODELS ARE OFTEN OVER- AMBITIOUS IN
DRYING OUT THE AIRMASS.

&&

.AVIATION...DELAYED NORTHWEST FLOW LAKE BREEZE EXPECTED THIS
AFTERNOON IN THE 21-23Z TIME FRAME. THUNDERSTORMS ARE EXPECTED
TO DEVELOP OVER THE OQUIRRH MOUNTAINS THIS AFTERNOON AND POSSIBLY
THE WASATCH RANGE. STORMS WILL DRIFT TO THE EAST AND A 40 PERCENT
CHANCE OF GUSTY OUTFLOWS AFFECTING THE TERMINAL THIS AFTERNOON AND
EVENING.

&&

.FIRE WEATHER...UPPER LEVEL RIDGE AND DEEP MOISTURE REMAIN IN PLACE
OVER UTAH THIS MORNING. A WEAK UPPER LEVEL DISTURBANCE WILL MOVE
ACROSS THE SOUTHERN HALF OF UTAH THIS AFTERNOON WITH NUMEROUS
MOUNTAIN THUNDERSTORMS AND SCATTERED VALLEY STORMS EXPECTED TO
DEVELOP THIS AFTERNOON AND EVENING...ESPECIALLY ACROSS THE CENTRAL
AND SOUTH. THESE STORMS WILL BE CAPABLE OF PRODUCING HEAVY RAIN.
WITH WEAK FLOW ALOFT WINDS AWAY FROM THUNDERSTORMS ARE EXPECTED TO
BE LIGHT AND PRIMARILY TERRAIN DRIVEN.  WITH THE DEEP MOISTURE IN
PLACE MINIMUM RELATIVE HUMIDITY VALUES WILL REMAIN ABOVE CRITICAL
THRESHOLDS ACROSS MOST OF THE STATE AND OVERNIGHT RECOVERIES WILL BE
GOOD.  THE DEEP MOISTURE IS EXPECTED TO REMAIN IN PLACE INTO THE
WEEKEND BRINGING THE THREAT OF THUNDERSTORMS EACH DAY AND KEEPING
RELATIVE HUMIDITIES ABOVE CRITICAL THRESHOLDS.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...FLASH FLOOD WATCH UNTIL 9 PM WEDNESDAY FOR UTZ010-UTZ012-UTZ013-
     UTZ016-UTZ019-UTZ020-UTZ021-UTZ517-UTZ518.

WY...NONE.

&&

PUBLIC...SCHOENING
FIRE WEATHER...GRAHAM
AVIATION...TARDY

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
517 AM MDT WED AUG 6 2008

UTZ001>016-019>021-517-518-WYZ021-071130-
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-
UTAHS DIXIE AND ZION NATIONAL PARK-SOUTH CENTRAL UTAH-
GLEN CANYON RECREATION AREA/LAKE POWELL-CENTRAL MOUNTAINS-
SOUTHERN MOUNTAINS-SOUTHWEST WYOMING-
517 AM MDT WED AUG 6 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN TWO THIRDS OF
UTAH AND SOUTHWEST WYOMING.

.DAY ONE...TODAY AND TONIGHT

DEEP MOISTURE WILL RESULT IN ANOTHER DAY OF SCATTERED SHOWERS AND
THUNDERSTORMS ACROSS THE FORECAST AREA TODAY. HEAVY RAIN IS
POSSIBLE WITH THUNDERSTORMS THAT DEVELOP THIS AFTERNOON AND THIS COULD
PRODUCE ISOLATED FLASH FLOODING. FLASH FLOOD PRONE AREAS LIKE DRY
WASHES AND SLOT CANYONS SHOULD BE AVOIDED. SHOWERS AND
THUNDERSTORMS MAY CONTINUE INTO THIS EVENING...PRIMARILY OVER
SOUTHERN UTAH WHERE THE GREATEST MOISTURE IS PRESENT.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

DEEP SUBTROPICAL MOISTURE WILL LINGER INTO THE WEEKEND BEFORE A
DRYING TREND BEGINS. THIS WILL RESULT IN AN ACTIVE THUNDERSTORM PATTERN
WITH LOCALLY HEAVY RAIN AND AN ELEVATED THREAT OF FLASH FLOODING.

.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)