Flash Flood Warning 24, NWS Salt Lake City, UT

774 
WGUS75 KSLC 192327
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
527 PM MDT FRI JUL 19 2013

UTC025-053-200015-
/O.CON.KSLC.FF.W.0024.000000T0000Z-130720T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON UT-KANE UT-
527 PM MDT FRI JUL 19 2013

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 PM MDT FOR
SOUTHWESTERN KANE AND SOUTHEASTERN WASHINGTON COUNTIES...

AT 517 PM MDT...HEAVY RAINFALL FROM EARLIER THUNDERSTORMS BROUGHT 1 
TO 2 INCHES OF RAINFALL TO THE HILDALE/COLORADO CITY AREA. TRAINED 
SPOTTERS REPORTED FLOODING UP TO A FOOT DEEP IN THIS AREA AS A 
DIRECT RESULT FROM THIS RAINFALL. ADDITIONALLY...FLASH FLOODING OF 
THE SHORT CREEK AREA MAY STILL OCCUR AS MUCH OF THIS RAIN FELL OVER 
ITS HEADWATERS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3707 11297 3709 11290 3701 11288 3700 11292
      3700 11303 3701 11301

$$

MERRILL

743 
WGUS75 KSLC 200014
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
614 PM MDT FRI JUL 19 2013

UTC025-053-200019-
/O.EXP.KSLC.FF.W.0024.000000T0000Z-130720T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON UT-KANE UT-
614 PM MDT FRI JUL 19 2013

...THE FLASH FLOOD WARNING WILL EXPIRE AT 615 PM MDT FOR THE TOWN OF 
HILDALE...

RUNOFF FROM EARLIER PRECIPITATION HAS DIMINISHED BUT REMAINS 
POSSIBLE INTO THIS EVENING ALONG SHORT CREEK. THIS SAID...ADDITIONAL 
FLASH FLOODING IS NOT ANTICIPATED. THEREFORE... THE FLASH FLOOD 
WARNING HAS BEEN ALLOWED TO EXPIRE. MONITOR NOAA WEATHER RADIO OR 
LOCAL TELEVISION OR RADIO FOR THE LATEST WEATHER INFORMATION.

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 3707 11297 3709 11290 3701 11288 3700 11292
      3700 11303 3701 11301

$$

MERRILL

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
323 PM MDT FRI JUL 19 2013

.SYNOPSIS...LIGHT NORTHERLY FLOW WILL ALLOW THE DRYING TREND FROM
NORTH TO SOUTH TO CONTINUE THROUGH SUNDAY...WITH MOISTURE
BECOMING INCREASINGLY CONFINED TO FAR SOUTHERN UTAH THROUGH THE
WEEKEND. HIGH PRESSURE WILL STRENGTHEN OVER NEVADA KEEPING
TEMPERATURES WELL ABOVE NORMAL.

&&

.DISCUSSION...MID LEVEL RIDGE AXIS IS SITUATED OVER NEVADA THIS
AFTERNOON AND WILL REMAIN INTO THE WEEKEND. A LIGHT NORTH TO
NORTHEAST FLOW ALOFT AROUND THE HIGH WILL REMAIN ACROSS THE
FORECAST AREA. THIS FLOW CONTINUES TO ADVECT DRIER AIR INTO
NORTHERN UTAH. THIS DRY AIR WILL CONTINUE TO SPREAD SOUTH TONIGHT
AND SATURDAY. SIGNIFICANT MOISTURE REMAINS ACROSS CENTRAL AND
SOUTHERN UTAH WHERE WIDESPREAD SHOWERS AND THUNDERSTORMS CONTINUE
TO DEVELOP. LIKE YESTERDAY...THE NORTHERLY COMPONENT TO THE FLOW
WILL PUSH CONVECTION SOUTHWARD OFF THE HIGHER TERRAIN. THE
DOWNBASIN PROPAGATION WILL ENHANCE THE POTENTIAL FOR LOCALIZED
FLASH FLOODING OVER SOUTHERN UTAH ESPECIALLY OVER FLOOD PRONE
BASINS...BURN SCARS AND SLOT CANYONS. A FLASH FLOOD WATCH WAS
ISSUED AROUND NOON AS THE POTENTIAL EXISTS FOR FLASH FLOODING
ACROSS THE SOUTH THROUGH 900 PM THIS EVENING. A WARNING HAS BEEN
ISSUED FOR THE SLOT CANYONS OF ZION PARK THROUGH LATE AFTERNOON.

FIRE WEATHER CONCERNS WILL BEGIN AGAIN AS THE AIRMASS DRIES OUT
ESPECIALLY OVER THE NORTH. HOWEVER...NO EXTREME FIRE WEATHER
BEHAVIOR IS ANTICIPATED AT THIS TIME. SEE FIRE WEATHER
DISCUSSION BELOW.

DRIER AIR WILL CONTINUE TO WORK ITS WAY SOUTHWARD INTO CENTRAL
UTAH THIS EVENING...WHILE MOISTURE REMAINS IN PLACE ACROSS THE
SOUTH. CONVECTION WILL SLOWLY DISSIPATE IN THE DRIER AIR. HEAVY
RAIN WILL BE THE PRIMARY CONCERN WITH CONVECTION OVER THE SOUTH.
HAIL AND ERRATIC WINDS ARE NOT EXPECTED...ALTHOUGH A SMALL
CHANCE ALWAYS EXISTS WITH THUNDERSTORMS.

THE AIRMASS WILL CONTINUE TO DRY FROM NORTH TO SOUTH INTO
WEEKEND...WITH ANY REMAINING MOISTURE SETTLING NEAR THE UTAH-
ARIZONA BORDER REGION. THE RIDGE AXIS IS FORECAST TO ELONGATE IN
AN EAST-WEST FASHION OVER THE WEEKEND INTO EARLY NEXT WEEK. THIS
WILL KEEP ANY SIGNIFICANT MOISTURE SUPPRESSED TO THE SOUTH. A VERY
WARM AND DRY AIRMASS ACROSS THE MAJORITY OF THE FORECAST AREA WILL
REMAIN KEEPING TEMPERATURES WELL ABOVE NORMAL STATEWIDE.

LATEST MODELS SUGGEST THE RIDGE AXIS EVENTUALLY SHIFTS BACK TO
THE EAST SOMETIME MID-WEEK. IF AND WHEN THIS OCCURS...MOISTURE
WILL AGAIN WORK BACK INTO THE STATE FROM THE SOUTH OPENING UTAH TO
ANOTHER BOUT OF AFTERNOON AND EVENING THUNDERSTORMS.

&&

.AVIATION...THE SLC TERMINAL WILL SEE VFR CONDITIONS THROUGHOUT THE
REMAINDER OF THE EVENING WITH MOSTLY CLEAR SKIES. NORTHWEST WINDS
ARE EXPECTED TO SHIFT TO THE SOUTHEAST BETWEEN 03-04Z.

&&

.FIRE WEATHER...DRIER AIR OVER NORTHERN UTAH WILL CONTINUE TO SPREAD
SOUTHWARD THROUGH THE WEEKEND AS HIGH PRESSURE REMAINS CENTERED TO
OUR WEST WITH A PERSISTENT NORTHERLY FLOW OVER THE DISTRICT. SHOWERS
AND THUNDERSTORMS...SOME WITH HEAVY RAIN...WILL CONTINUE ACROSS THE
SOUTH INTO THIS EVENING. SHOWERS AND THUNDERSTORMS WILL BE CONFINED
TO FAR SOUTHERN UTAH SATURDAY AND THE FAR SOUTHWEST SUNDAY. WARM
TEMPERATURES AND LOWER HUMIDITY WILL ACCOMPANY THE DRIER AIR INTO
THE AREA. OUTSIDE OF THUNDERSTORMS...WINDS WILL BE GENERALLY LIGHT
AND TERRAIN DRIVEN OVER THE NEXT FEW DAYS ALTHOUGH AFTERNOON WEST
WINDS WILL PICK UP ACROSS THE FAR NORTHEAST. MOISTURE WILL PERSIST
OVER THE FAR SOUTHWEST THROUGH EARLY NEXT WEEK THEN START TO WORK
BACK NORTH BY MIDWEEK.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...FLASH FLOOD WATCH UNTIL 9 PM MDT THIS EVENING FOR
     UTZ013-019>021-517-518.

WY...NONE.
&&

PUBLIC/AVIATION...YOUNG
FIRE WEATHER......WILENSKY

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

FOR FREQUENTLY ASKED QUESTIONS ABOUT THE AREA FORECAST DISCUSSION
VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY/GENERAL/AFD_FAQS.PHP (ALL LOWER CASE)

HAZARDOUS WEATHER OUTLOOK...CORRECTED
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
541 AM MDT FRI JUL 19 2013

UTZ001>016-019>021-517-518-WYZ021-201145-
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-
541 AM MDT FRI JUL 19 2013

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

.DAY ONE...TODAY AND TONIGHT

SHOWERS AND THUNDERSTORMS CAPABLE OF PRODUCING LOCALLY HEAVY
RAINFALL CAN BE EXPECTED ACROSS SOUTHERN UTAH THIS AFTERNOON AND
EVENING. ISOLATED FLASH FLOODING WILL BE POSSIBLE...PARTICULARLY
WITHIN SLOT CANYONS...NORMALLY DRY WASHES...AND NEAR RECENT BURN
SCARS.

DRIER AIR SPREADING INTO NORTHERN AND CENTRAL UTAH WILL KEEP THE
THREAT FOR THUNDERSTORMS ISOLATED...AND MAINLY CONFINED TO THE
HIGHER TERRAIN.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

ISOLATED THUNDERSTORMS WILL REMAIN POSSIBLE ACROSS SOUTHERN UTAH
THROUGH THE WEEKEND...HOWEVER THE THREAT FOR HEAVY RAINFALL WILL
BE DIMINISHED AS DRIER AIR SPREADS INTO THE AREA.

STRENGTHENING HIGH PRESSURE WILL KEEP TEMPERATURES ABOVE NORMAL
THROUGH THE WEEKEND AND INTO EARLY NEXT WEEK ACROSS MUCH OF THE
OUTLOOK AREA...WITH TEMPERATURES NEAR OR ABOVE 100 DEGREES IN
MOST VALLEY LOCATIONS.

.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)

FOR INFORMATION ON POTENTIAL TRAVEL IMPACTS VISIT...
HTTP://WWW.UDOTTRAFFIC.UTAH.GOV/ROADWEATHERFORECAST.ASPX