Flash Flood Warning 1, NWS Salt Lake City, UT

675 
WGUS75 KSLC 050737
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
137 AM MDT FRI JUL 5 2013

UTC023-027-050900-
/O.CON.KSLC.FF.W.0001.000000T0000Z-130705T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MILLARD UT-JUAB UT-
137 AM MDT FRI JUL 5 2013

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 300 AM MDT FOR
SOUTHEASTERN JUAB AND NORTHEASTERN MILLARD COUNTIES...

AT 130 AM MDT...DOPPLER RADAR INDICATED THAT EARLIER HEAVY RAINFALL 
HAS MOVED EAST OF THE CLAY SPRINGS BURN SCAR. STEADY LIGHT TO 
MODERATE RAIN WILL CONTINUE THROUGH AROUND 230 AM. THE HEAVIEST 
RAINFALL OCCURRED OVER THE FOOLS CREEK DRAINAGE. THIS EXCESSIVE 
RAINFALL WILL CREATE DEBRIS FLOWS THROUGH THAT DRAINAGE WITH 
FLOODING POSSIBLE ALONG STATE ROUTE 125 BETWEEN OAK CITY TO NEAR 
LEAMINGTON.  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF A DEBRIS FLOW HAS OCCURRED IT IS IMPORTANT REALIZE THAT THE RUNOUT
AREA REMAINS VERY DANGEROUS. ADDITIONAL DEBRIS FLOWS MAY OCCUR WITHIN
MINUTES OF THE ORIGINAL FLOW. PLEASE REMAIN VIGILANT AND BE PREPARED
TO TAKE SWIFT ACTION.

&&

LAT...LON 3956 11221 3949 11219 3944 11210 3937 11242
      3956 11245

$$

CONGER

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
717 PM MDT THU JUL 4 2013

.SYNOPSIS...THE UPPER HIGH OVER THE GREAT BASIN WILL SHIFT SOUTH AND
EAST THROUGH THE WEEKEND WITH A MOIST AND UNSTABLE AIRMASS REMAINING
IN PLACE OVER THE REGION. A DRIER AIRMASS WILL MOVE IN BY THE
MIDDLE OF NEXT WEEK.

&&

.DISCUSSION...SHORTWAVE RIDGING/SUBSIDENCE HAS LARGELY INHIBITED
CONVECTION ACROSS NORTHERN UT EARLY THIS EVENING...WITH A LAYER OF
CONVECTIVE INHIBITION EVIDENT BETWEEN 650 AND 600MB ON THE 00Z
KSLC SOUNDING. ANY ACTIVITY WHICH MANAGED TO DEVELOP EARLIER HAS
SINCE DISSIPATED...INCLUDING CU. AS SUCH HAVE REMOVED EVENING POPS
FOR THE NORTHERN THIRD OF THE FORECAST AREA. HRRR RUNS HAVE
SUGGESTED CONVECTION MOVING ACROSS SOUTHWEST ID MAY SPREAD INTO
NORTHERN UT OVERNIGHT IF IT MAINTAINS ITSELF. AS SUCH HAVE LEFT
OVERNIGHT CHANCE POPS IN FORECAST FOR NOW.

FURTHER SOUTH SHOWERS AND THUNDERSTORMS CONTINUE ACROSS THE
SOUTHERN HALF OF THE STATE...BUT HAVE BEEN GRADUALLY WANING IN
INTENSITY OVER THE PAST HOUR OR SO. WITH THE LOSS OF DAYTIME
HEATING AND LACK OF ANY SUBSTANTIAL DYNAMIC FORCING MECHANISM
ANTICIPATE THIS ACTIVITY TO CONTINUE ITS DOWNWARD TREND THROUGH
THE REMAINDER OF THE EVENING HOURS. ADDITIONALLY WILL ALLOW THE
GOING HEAT ADVISORY FOR LOWER ELEVATIONS TO EXPIRE.

MID LEVEL RIDGE IS FORECAST TO SHIFT SOUTHEAST FRIDAY THROUGH THE
WEEKEND AS A TROUGH DEVELOPS OVER THE PACIFIC NORTHWEST. RESULTING
SOUTHWESTERLY FLOW WILL ALLOW MOISTURE TO REMAIN IN PLACE ACROSS
THE FORECAST AREA THROUGH THE WEEKEND...MAINTAINING A CHANCE OF
SHOWERS AND THUNDERSTORMS AREAWIDE.

&&

.AVIATION...VFR CONDITIONS EXPECTED AT KSLC THROUGH THE REMAINDER
OF THE EVENING. THERE IS A 20 PERCENT CHANCE OF A THUNDERSTORM
IMPACTING THE TERMINAL DURING THE 07-12Z TIMEFRAME.

ACCOMANIED BY MVFR VIS AND GUSTY/ERRATIC WINDS. OUTSIDE OF THE
ABOVE MENTIONED CONCERNS...SURFACE WINDS WILL REMAIN NORTHWEST
THROUGH 03-04Z BEFORE RETURNING TO THE SOUTH FOR THE OVERNIGHT
HOURS.

&&

.FIRE WEATHER...THUNDERSTORM COVERAGE INCREASES THROUGH THIS WEEKEND
AS A RIDGE OF HIGH PRESSURE WITH PLENTY OF MOISTURE EMBEDDED SHIFTS
EAST INTO THE FOUR CORNERS REGION. IN THIS PATTERN...CONVECTION WILL
NOT BE LIMITED TO AFTERNOON/EARLY EVENING. ACROSS NORTHERN
UTAH...THE CHANCE OF WETTING RAINS WILL INCREASE. IT WILL REMAIN DRY
ENOUGH IN THE LOWER LEVELS FOR THE THREAT OF GUSTY/ERRATIC WINDS
WITH CONVECTIVE ACTIVITY ALONG WITH LIGHTNING ACROSS CENTRAL AND
SOUTHERN UTAH THOUGH LOCALLY HEAVY RAINFALL CANNOT BE RULED OUT
UNDER THE STRONGER ACTIVITY.

ACROSS SOUTHWEST UTAH FRIDAY INTO THIS WEEKEND...SOUTHWEST WINDS
WILL BECOME GUSTY...THOUGH RH VALUES WILL BE MARGINAL FOR CRITICAL
FIRE WEATHER CONDITIONS. ISOLATED CRITICAL FIRE WEATHER CONDITIONS
ARE POSSIBLE ACROSS THIS PORTION OF THE STATE. TEMPERATURES ACROSS
THE REGION WILL DECREASE...AT THE EXPENSE OF RISING HUMIDITY VALUES
THROUGH THIS WEEKEND.

DRIER SOUTHWESTERLY FLOW ALOFT SETTLES INTO THE REGION EARLY NEXT
WEEK. VERY WARM CONDITIONS WILL CONTINUE WITH HUMIDITY VALUES
FALLING SIGNIFICANTLY (WITH MANY AREAS IN THE SINGLE DIGITS).
CONVECTION EARLY NEXT WEEK SHOULD BECOME MORE DIURNAL IN NATURE AND
BETTER TIED TO MOUNTAINOUS TERRAIN.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...HEAT ADVISORY UNTIL 10 PM MDT THIS EVENING FOR UTZ019>021.

WY...NONE.
&&

SEAMAN/ROGOWSKI

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
158 PM MDT THU JUL 4 2013

UTZ001>016-019>021-517-518-WYZ021-051300-
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-
158 PM MDT THU JUL 4 2013

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

SCATTERED SHOWERS AND THUNDERSTORMS ARE FORECAST FOR THE REGION
TODAY. THESE STORMS WILL PRODUCE LOCALLY HEAVY RAIN AND GUSTY
WINDS ALONG WITH LIGHTNING. IF A HEAVIER STORM PASSES OVER A BURN
SCAR OR SLOT CANYONS...THERE IS A THREAT OF ISOLATED FLASH
FLOODING.

STORMS WILL CONTINUE INTO TONIGHT AND MAY INCREASE ACROSS THE
NORTH AFTER MIDNIGHT.

TEMPERATURES ACROSS THE OUTLOOK AREA WILL BE COOLER TODAY
ALTHOUGH TRIPLE DIGIT READINGS ARE STILL EXPECTED ACROSS THE FAR
SOUTH AND SOUTHEAST. TEMPERATURES WILL ONCE AGAIN RISE TO NEAR
110 ACROSS UTAHS DIXIE.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

AFTERNOON AND EVENING THUNDERSTORMS WILL REMAIN SCATTERED ACROSS
THE OUTLOOK AREA FRIDAY INTO THE WEEKEND AS MOISTURE REMAINS IN
PLACE. THERE WILL BE AN INCREASING THREAT OF LOCAL HEAVY RAIN
ALONG WITH ISOLATED FLASH FLOODING HEADING INTO THE WEEKEND.

GUSTY SOUTHWEST WINDS AND MARGINALLY LOW HUMIDITY LEVELS MAY
COMBINE TO PRESENT LOCALLY CRITICAL FIRE WEATHER CONDITIONS ACROSS
SOUTHWEST UTAH FRIDAY AND SATURDAY.

.SPOTTER INFORMATION STATEMENT...

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

ROGOWSKI

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

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
905 PM MDT THU JUL 4 2013

UTZ005-050400-
GREAT SALT LAKE DESERT AND MOUNTAINS UT-
905 PM MDT THU JUL 4 2013

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN BOX ELDER COUNTY UNTIL
1000 PM MDT...

AT 902 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 7 MILES NORTH OF MONTELLO...MOVING EAST AT 35
MPH.

PENNY TO NICKEL SIZE HAIL AND WIND GUSTS OF 40 TO 55 MPH ARE EXPECTED
WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS
LIGHTNING.

* LOCATIONS IMPACTED INCLUDE...
   LUCIN...

THESE STORMS HAVE A HISTORY OF PRODUCING WIND GUSTS TO 55 MPH AS
THEY CROSSED EASTERN NEVADA.

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

LAT...LON 4200 11295 4159 11298 4106 11334 4104 11403
      4198 11404
TIME...MOT...LOC 0304Z 280DEG 32KT 4135 11417

MPS

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1047 PM MDT THU JUL 4 2013

UTZ002-005-050545-
GREAT SALT LAKE DESERT AND MOUNTAINS UT-NORTHERN WASATCH FRONT UT-
1047 PM MDT THU JUL 4 2013

...SIGNIFICANT WEATHER ADVISORY FOR BOX ELDER AND NORTHWESTERN TOOELE
COUNTIES UNTIL 1145 PM MDT...

AT 1041 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF STRONG THUNDERSTORMS CROSSING WESTERN BOX ELDER AND WESTERN
TOOELE COUNTIES...MOVING EAST AT 30 MPH.

WIND GUSTS OF TO 55 MPH ARE EXPECTED WITH THESE STORMS...ALONG WITH
LOCALLY HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING.

* LOCATIONS IMPACTED INCLUDE...
  WENDOVER...
  SNOWVILLE...
  I-80 FROM MILE POST 1 TO MILE POST 50

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

LAT...LON 4037 11287 4036 11404 4197 11403 4200 11224
TIME...MOT...LOC 0446Z 264DEG 19KT 4080 11384

MPS