Severe Thunderstorm Warning 25, NWS Salt Lake City, UT

544 
WWUS55 KSLC 240305
SVSSLC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
905 PM MDT FRI AUG 23 2013

UTC015-240330-
/O.CON.KSLC.SV.W.0025.000000T0000Z-130824T0330Z/
EMERY UT-
905 PM MDT FRI AUG 23 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM MDT
FOR CENTRAL EMERY COUNTY...

AT 902 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE 
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS 
LOCATED OVER CENTRAL EMERY COUNTY...OR ABOUT 31 MILES WEST OF GREEN 
RIVER...MOVING NORTH AT 20 MPH. THIS STORM HAS MOVED NORTH OF 
INTERSTATE 70.

* LOCATIONS IN THE WARNING INCLUDE...
  RURAL CENTRAL EMERY COUNTY

LAT...LON 3888 11068 3888 11077 3911 11096 3912 11066
TIME...MOT...LOC 0304Z 185DEG 17KT 3896 11074

$$

ROGOWSKI

333 
WWUS55 KSLC 240325
SVSSLC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
925 PM MDT FRI AUG 23 2013

UTC015-240335-
/O.EXP.KSLC.SV.W.0025.000000T0000Z-130824T0330Z/
EMERY UT-
925 PM MDT FRI AUG 23 2013

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL EMERY COUNTY WILL
EXPIRE AT 930 PM MDT...

THE STORM HAS WEAKENED AND IS NO LONGER SEVERE. THEREFORE THE WARNING
HAS BEEN ALLOWED TO EXPIRE.

LAT...LON 3888 11068 3888 11077 3911 11096 3912 11066
TIME...MOT...LOC 0325Z 185DEG 27KT 3915 11071

$$

ROGOWSKI

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
744 PM MDT FRI AUG 23 2013

.SYNOPSIS...A DISTURBANCE MOVING ACROSS THE STATE WILL EXIT LATER
TONIGHT. TROPICAL MOISTURE WILL BEGIN TO BE PULLED INTO THE AREA
SUNDAY AND REMAIN IN PLACE THROUGH EARLY NEXT WEEK.

&&

.DISCUSSION...WATER VAPOR LOOP SHOWS A DISTURBANCE LIFTING NORTHERN
UTAH AHEAD OF AN APPROACHING TROUGH OFF THE PACIFIC NORTHWEST. A
RIDGE IS LOCATED ACROSS THE PLAINS. ACARS 400-250MB WIND
OBSERVATIONS PLACE A 50-95KT CYCLONICALLY CURVED JET OVER THE
PACIFIC NORTHWEST AND NORTHERN ROCKIES. RAP...GOES...GPS
SENSORS...AND 00Z SLC RAOB INDICATE PRECIPITABLE WATER VALUES RANGE
FROM 0.75" TO 1.25".

UPDATED TO FOCUS POPS ALONG NORTHERN AND EASTERN ZONES AS THE
DISTURBANCE CONTINUES TO LIFT NORTHEAST THROUGH THE AREA. INCREASED
CLOUD COVER SIGNIFICANTLY ACROSS THE NORTH THIS EVENING BEFORE
BECOMING PARTLY CLOUDY OVERNIGHT. UPDATE TO TEMPERATURES MAINLY TO
DIURNAL TEMPERATURE CURVE. REST UNCHANGED.

PREVIOUS DISCUSSION FOLLOWS...
SHOWERS AND THUNDERSTORMS CONTINUE ACROSS MUCH OF
THE STATE THIS AFTERNOON. THE MAIN THREATS WILL CONTINUE TO BE
GUSTY WINDS AND HEAVY RAINFALL...ALTHOUGH SMALL HAIL CANNOT BE
RULED OUT ACROSS EASTERN UTAH THROUGH THE EVENING. AS THE VORT MAX
RESPONSIBLE FOR THIS CONVECTION MOVES OUT OF THE AREA
TONIGHT...PRECIPITATION SHOULD LARGELY COME TO AN END. ENOUGH
MOISTURE REMAINS IN PLACE FOR CONVECTIVE DEVELOPMENT AGAIN
SATURDAY...ALTHOUGH COVERAGE WILL BE LESS THAN TODAY.

ATTENTION THEN TURNS TO THE POTENTIAL FOR A LONG DURATION MODERATE
RAINFALL EVENT ACROSS EASTERN AND SOUTHERN UTAH SUNDAY INTO
MONDAY. TROPICAL STORM IVO IS CURRENTLY LOCATED SOUTH OF BAJA
CALIFORNIA AND WILL GRADUALLY MOVE TO THE NORTH OVER THE NEXT
SEVERAL DAYS. AS A TROUGH BEGINS TO IMPACT THE WESTERN UNITED
STATES...MOISTURE FROM THIS SYSTEM WILL BE PULLED INTO THE
SOUTHWESTERN UNITED STATES. THIS TROPICAL MOISTURE FEED WILL BUILD
INTO SOUTHERN UTAH SUNDAY...REACHING CENTRAL UTAH LATER ON SUNDAY.

IN ADDITION TO THIS TROPICAL FEED OF MOISTURE MOVING NORTHWARD...A
FAIRLY STRONG JET WILL SET UP ACROSS THE WEST...WITH THE ENTRANCE
REGION TO A NORTH-SOUTH ORIENTED JET STREAK IN A FAVORABLE
LOCATION. WHILE MODELS DIFFER IN THE AMOUNT OF QPF THROUGH THIS
PERIOD...GENERALLY 2 TO 3 INCHES OF RAIN OVER THE SUNDAY TO MONDAY
PERIOD CAN BE EXPECTED ACROSS EASTERN AND SOUTHERN UTAH. THIS WILL
LIKELY CAUSE ENHANCED RUNOFF IN SLOT CANYONS AND DRY SLOTS AS WELL
THE POSSIBILITY OF DEBRIS FLOWS OFF BURN SCARS. IN
ADDITION...PONDING ON ROADWAYS AND IN LOW DRAINAGE AREAS WILL BE
POSSIBLE IN URBAN ENVIRONMENTS INCLUDING SAINT GEORGE.

GIVEN ALL OF THESE INGREDIENTS...ISSUE A FLOOD WATCH FOR EASTERN
AND SOUTHERN UTAH FOR SUNDAY AFTERNOON TO MONDAY AFTERNOON. ANYONE
TRAVELING TO OR LIVING IN THESE AREAS SHOULD MONITOR FUTURE
FORECASTS AND WATCH FOR POSSIBLE WARNINGS SUNDAY AND MONDAY.

&&

.AVIATION...SOUTH WINDS WILL CONTINUE AT THE SLC TERMINAL THROUGH
THE NIGHT...SHIFTING TO THE EAST AT TIMES EARLY EVENING AS
SHOWERS PASS OVER THE MOUNTAINS. CEILINGS ABOVE 6KFT. THREAT OF
CONVECTION WANES OVERNIGHT.

&&

.FIRE WEATHER...SHOWERS AND THUNDERSTORMS WILL CONTINUE INTO THIS
EVENING ACROSS MUCH OF THE STATE. THESE STORMS WILL BE ACCOMPANIED
BY WETTING RAIN. THE MAIN FIRE WEATHER THREAT FROM STORMS THIS
AFTERNOON WILL BE GUSTY AND ERRATIC WINDS.

SOMEWHAT DRIER AIR WILL MOVE INTO NORTHWESTERN UTAH TOMORROW
AFTERNOON. WITH INCREASING SOUTHWESTERLY WINDS...ISOLATED PORTIONS
OF NORTHWESTERN UTAH MAY SEE CRITICAL FIRE WEATHER CONDITIONS.
HOWEVER...RH VALUES LOOK TO BE MARGINAL. STORMS WILL DEVELOP AGAIN
TOMORROW AFTERNOON...INITIALLY OVER THE HIGHER TERRAIN.
AGAIN...WITH DEEP MOISTURE THESE STORMS WILL BE ACCOMPANIED BY
WETTING RAIN.

DEEP MOISTURE WILL MOVE INTO SOUTHERN UTAH SUNDAY...AND SURGE
NORTHWARD THROUGH MONDAY. AS A RESULT...A WIDESPREAD OF WETTING
RAIN IS EXPECTED ACROSS CENTRAL/SOUTHERN UTAH SUNDAY...AND
POSSIBLY SPREAD NORTHWARD MONDAY. MOISTURE WILL REMAIN OVER THE
AREA THROUGH THE WEEK NEXT WEEK.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...FLOOD WATCH FROM SUNDAY AFTERNOON THROUGH MONDAY AFTERNOON FOR
     UTZ010>014-016-019>021-517-518.

WY...NONE.
&&

PUBLIC...ROGOWSKI/KRUSE
FIRE WEATHER...HOSENFELD
AVIATION...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
330 PM MDT FRI AUG 23 2013

UTZ001>016-019>021-517-518-WYZ021-241200-
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-
330 PM MDT FRI AUG 23 2013

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

.DAY ONE...TODAY AND TONIGHT

SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS MUCH OF THE OUTLOOK
AREA THIS EVENING INTO TONIGHT. HEAVY RAINFALL AND GUSTY WINDS WILL
BE THE MAIN THREATS FROM ANY THUNDERSTORMS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

SHOWERS AND THUNDERSTORMS ARE EXPECTED AGAIN ACROSS THE OUTLOOK AREA
SATURDAY AFTERNOON AND EVENING...ALTHOUGH TO A LESSER EXTENT THAN
FRIDAY. GUSTY WINDS AND HEAVY RAINFALL WILL CONTINUE TO BE A THREAT
WITH ANY THUNDERSTORMS.

WIDESPREAD RAINFALL IS EXPECTED ACROSS EASTERN AND SOUTHERN PORTIONS
OF UTAH SUNDAY AFTERNOON THROUGH MONDAY NIGHT. THIS LONG DURATION
RAINFALL MAY CAUSE DRY WASHES AND SLOT CANYONS TO EXPERIENCE
ENHANCED RUNOFF. BURN SCARS WILL ALSO BE AT RISK OF DEBRIS FLOW.
POOR DRAINAGE AND LOW LYING AREAS IN URBAN ENVIRONMENTS WILL ALSO BE
PRONE TO 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)

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