Flash Flood Warning 28, NWS Salt Lake City, UT

765 
WGUS75 KSLC 150234
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
834 PM MDT SUN JUN 14 2015

UTC015-150315-
/O.CON.KSLC.FF.W.0028.000000T0000Z-150615T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
EMERY UT-
834 PM MDT SUN JUN 14 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 PM MDT FOR
NORTHWESTERN EMERY COUNTY...

AT 823 PM MDT...DOPPLER RADAR INDICATED THAT HEAVY RAINFALL HAS 
ENDED OVER THE SEELEY BURN SCAR. RADAR ESTIMATES INDICATE THAT 
AROUND 0.60 INCHES OF RAINFALL FELL ON THE BURN SCAR IN ABOUT A 30 
MINUTE PERIOD. RUNOFF FROM THIS RAINFALL IS LIKELY STILL MOVING DOWN 
HUNTINGTON CREEK.

THIS AMOUNT OF RAINFALL SHOULD HAVE BEEN SUFFICIENT TO GENERATE 
FLASH FLOODING AND A DEBRIS FLOW OFF THE SEELEY BURN SCAR WHICH 
WOULD IMPACT HUNTINGTON CREEK AND STATE ROUTE 31 IN HUNTINGTON 
CANYON. 

IF A DEBRIS FLOW IS MOVING THROUGH HUNTINGTON CANYON IT WOULD 
CONSIST OF ROCK...MUD...VEGETATION AND OTHER LOOSE MATERIALS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE AWAY FROM RECENTLY BURNED AREAS. LIFE THREATENING FLOODING OF 
CREEKS...ROADS AND NORMALLY DRY WASHES IS POSSIBLE. THE HEAVY RAINS 
COULD HAVE TRIGGERED ROCKSLIDES...MUDSLIDES AND DEBRIS FLOWS IN 
STEEP TERRAIN...ESPECIALLY IN AND AROUND THESE AREAS.

&&

LAT...LON 3933 11102 3941 11116 3950 11123 3961 11123
      3962 11119 3959 11116 3960 11114 3946 11109
      3941 11109 3936 11099

$$

PW

911 
WGUS75 KSLC 150312
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
912 PM MDT SUN JUN 14 2015

UTC015-150320-
/O.EXP.KSLC.FF.W.0028.000000T0000Z-150615T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
EMERY UT-
912 PM MDT SUN JUN 14 2015

...THE FLASH FLOOD WARNING FOR NORTHWESTERN EMERY COUNTY WILL EXPIRE
AT 915 PM MDT...

THE THREAT OF FLASH FLOODING FROM THE SEELEY BURN SCAR HAS 
DIMINISHED...AND IS NO LONGER EXPECTED TO POSE A THREAT TO LIFE OR 
PROPERTY. PLEASE CONTINUE TO HEED ANY ROAD CLOSURES.

LAT...LON 3933 11102 3941 11116 3950 11123 3961 11123
      3962 11119 3959 11116 3960 11114 3946 11109
      3941 11109 3936 11099

$$

PW

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
334 PM MDT SUN JUN 14 2015

.SYNOPSIS...A WEAK WEATHER DISTURBANCES MOVING INTO WESTERN UTAH
WILL MAINTAIN SOME SHOWERS AND THUNDERSTORMS TONIGHT. A SECOND
DISTURBANCE WILL FOCUS SHOWERS AND STORMS OVER THE NORTH
TUESDAY. A WARMER AND SUBSTANTIALLY DRIER AIR MASS WILL FOLLOW
MIDWEEK.

&&

.SHORT TERM (THROUGH 06Z THURSDAY)...SHOWER SAND THUNDERSTORMS
HAVE FIRED UP ONCE AGAIN ACROSS MAINLY THE SOUTHERN TWO-THIRDS OF
THE FORECAST AREA THIS AFTERNOON. A STILL FAIRLY MOIST AIR MASS
COMBINED WITH GOOD DIFFERENTIAL HEATING DROVE MOST OF THE EARLY
CONVECTION OVER THE HIGHER TERRAIN...WITH A WEAK SHORTWAVE MOVING
OUT OF EAST-CENTRAL NEVADA SUPPLYING THE NECESSARY LIFT FOR
SHOWERS AND THUNDERSTORMS ACROSS WEST-CENTRAL UTAH LATE THIS
AFTERNOON. WILL LIKELY SEE LOOSELY ORGANIZED CONVECTION PERSIST
AHEAD OF THIS WEAK DYNAMIC FEATURE OVERNIGHT...WITH THE REMAINING
ACTIVITY WORKING INTO PORTIONS OF NORTHERN UTAH FOR LATE THIS
EVENING THROUGH EARLY MONDAY. A SUBSTANTIALLY DRIER LOW-LEVEL
AIRMASS MEANS MORE HIGH-BASED CONVECTION AND MICROBURST WINDS
VERSUS THE RECENT CONVECTION PRODUCING HEAVY RAINFALL.

THE WESTERLY WILL STRENGTHENING ACROSS THE NORTHERN ROCKIES AND
NORTHERN GREAT BASIN BEGINNING EARLY THIS WEEK, A TRAILING
SHORTWAVE WILL REACH FAR NORTHERN UTAH BY MONDAY NIGHT. THIS
FEATURE SHOULD HAVE ENOUGH BAROCLINIC STRUCTURE TO SUPPORT
CONVECTION EVEN IN THE SOMEWHAT DRIER AIR MASS IN PLACE ACROSS
NORTHERN UTAH. LOOKING AT FAIRLY DECENT AREAL COVERAGE OF
CONVECTION WITH THIS DYNAMIC FEATURE...THOUGH SIGNIFICANT RAINFALL
WILL BE SOMEWHAT LIMITED IN AREAL COVERAGE.

SIGNIFICANTLY DRIER/WARMER AIR USHERED IN BY THE WESTERLIES WILL
COVER MUCH OF THE GREAT BASIN BY MIDWEEK. CAN NOT RULED OUT
ISOLATED DIURNAL CONVECTION DURING THE LATTER HALF OF THE WEEK...
THOUGH THE PREVAILING CONDITIONS WILL LIKELY CONSIST OF MOSTLY
CLEAR SKIES AND ABOVE NORMAL TEMPS FOR MID-JUNE.

.LONG TERM (AFTER 06Z THURSDAY)..AIRMASS OVER THE FORECAST AREA
LOOKS TO REMAIN QUITE DRY THROUGH THE END OF THE FORECAST PERIOD.
HIGH PRESSURE IS PROGGED TO FLATTEN ON THURSDAY AS A SERIES OF
WEAK TROUGHS MOVE OVER THE RIDGE. ONE SYSTEM IS EXPECTED TO GET
CLOSE ENOUGH ON FRIDAY TO BRING A DRY FRONT THROUGH NORTHERN UTAH.
CANNOT RULE OUT A FEW STORMS OVER THE HIGHER TERRAIN OF NORTHERN
UTAH...BUT THINK THE AIRMASS WILL BE TOO DRY TO PRODUCE ANYTHING
MORE THAN THAT. BY SATURDAY...MAXES OVER NORTHERN UTAH ARE
EXPECTED TO BE RIGHT AROUND SEASONAL NORMALS WITH SOME ADDITIONAL
COOLER AIR MOVING IN. EC/GFS AGREE THAT STRONG RIDGING WILL
REBOUND FOR DAY 7... COMMENCING ANOTHER WARMING TREND AS THE
AIRMASS REMAINS DRY.

&&

.AVIATION...SHOWERS AND THUNDERSTORMS CURRENTLY DEVELOPING OVER
EASTERN NEVADA ARE EXPECTED TO TRANSLATE EAST...AND A 20 PERCENT
CHANCE EXISTS THEY WILL IMPACT THE KSLC TERMINAL THIS EVENING. THESE
STORMS ARE EXPECTED TO BE HIGH BASED WITH GUSTY WEST TO NORTHWEST
OUTFLOW AND ISOLATED MICROBURST WINDS...MOST LIKELY AFTER 23Z. THE
BULK OF THIS ACTIVITY IS EXPECTED TO WANE BY 03Z...BUT A 10 PERCENT
CHANCE THEY WILL LINGER THROUGH 06Z.

&&

.FIRE WEATHER...CONDITIONS ACROSS ALL FIRE DISTRICT WILL TURN
WARMER AND DRIER AS A WESTERLY FLOW ALOFT SETS UP ACROSS THE GREAT
BASIN. IN THE SHORT TERM RESIDUAL MOISTURE HAS SPAWNED ANOTHER
ROUND OF SHOWERS/STORMS ACROSS MAINLY THE SOUTHERN TWO-THIRDS OF
UTAH THIS AFTERNOON. THIS CONVECTION IS GENERATING MORE WIND THAN
RAIN AS THE LOW-LEVEL OF THE AIR MASS HAVE DRIED A BIT SINCE
YESTERDAY. A WEAK WEATHER DISTURBANCE WILL ENTER WESTERN UTAH
TONIGHT...DRIVING SOME SHOWER/THUNDERSTORM ACTIVITY INTO THE
NORTHERN PORTION OF UTAH FOR LATER TONIGHT THROUGH EARLY MONDAY.
A TRAILING WEATHER DISTURBANCE ON TUESDAY WILL RENEW THE CHANCES
AT CONVECTION TUESDAY...THEN THE DRY AND WARM AIR MASS WILL FOLLOW
FOR MIDWEEK.

BY THE NUMBERS CRITICAL FIRE WEATHER CONDITIONS COULD ARRIVE OVER
MOST AREAS BY MIDWEEK. FUELS STILL REMAIN MOIST ENOUGH THAT FIRE
WEATHER HIGHLIGHTS WILL NOT BE ISSUED AT THIS TIME.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...NONE.
WY...NONE.
&&

SHORT TERM/FIRE WEATHER...CONGER
AVIATION...MERRILL
LONG TERM...TRAPHAGAN

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
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
337 AM MDT SUN JUN 14 2015

UTZ001>016-019>021-517-518-WYZ021-151300-
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-
337 AM MDT SUN JUN 14 2015

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

.DAY ONE...TODAY AND TONIGHT

ISOLATED TO SCATTERED THUNDERSTORMS ARE EXPECTED TO BE MOST
PREVALENT ACROSS SOUTH CENTRAL UTAH THIS AFTERNOON...PROPAGATING
NORTHEAST TOWARD I-80 THIS EVENING. THE PRIMARY THREAT IS STRONG
GUSTY WINDS. VERY WARM TEMPERATURES WILL BE IN PLACE CLIMBING INTO
THE 90S UP TO NEAR 105.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

THUNDERSTORMS ARE FORECAST TO FOCUS ACROSS NORTHERN UTAH AND
SOUTHWEST WYOMING MONDAY AFTERNOON AND EVENING...WHICH MAY BRING
A RISK OF GUSTY WINDS AND SMALL HAIL.

VERY WARM TEMPERATURES WILL PERSIST THROUGH MUCH OF THE WEEK.

.SPOTTER INFORMATION STATEMENT...

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

ROGOWSKI/STRUTHWOLF

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

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

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
355 PM MDT SUN JUN 14 2015

UTZ004-142245-
SOUTHERN WASATCH FRONT UT-
355 PM MDT SUN JUN 14 2015

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL UTAH COUNTY UNTIL
445 PM MDT...

AT 353 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 9 MILES WEST OF LAKE SHORE...OR 13 MILES
NORTHWEST OF PAYSON...MOVING EAST AT 20 MPH. THIS STORM WILL TRACK
ACROSS UTAH LAKE THROUGH 430 PM MDT.

PEA SIZE HAIL...FREQUENT CLOUD TO GROUND LIGHTNING AND WINDS OF 40
TO 55 MPH WILL BE POSSIBLE.

LOCATIONS IMPACTED INCLUDE...
PROVO...OREM...SPANISH FORK...SPRINGVILLE...EAGLE MOUNTAIN...
LINDON...MAPLETON...VINEYARD...LAKE SHORE...PALMYRA...BENJAMIN...WEST
MOUNTAIN...SARATOGA SPRINGS AND FAIRFIELD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF ON OR NEAR UTAH LAKE...GET OUT OF THE WATER AND MOVE INDOORS OR
INSIDE A VEHICLE. REMEMBER...LIGHTNING CAN STRIKE OUT TO 15 MILES
FROM THE PARENT THUNDERSTORM. IF YOU CAN HEAR THUNDER...YOU ARE
CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. MOVE TO SAFE SHELTER NOW. DO
NOT BE CAUGHT ON THE WATER IN A THUNDERSTORM.

&&

LAT...LON 4005 11206 4023 11212 4035 11175 4015 11157
TIME...MOT...LOC 2153Z 250DEG 17KT 4016 11192

GM