Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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000
FXUS65 KSLC 280407
AFDSLC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1007 PM MDT SAT SEP 27 2014

.SYNOPSIS...A COOL MOIST UPPER LOW WILL SLOWLY CROSS THE EASTERN
GREAT BASIN THROUGH MONDAY. ANOTHER WEAKER SYSTEM WILL CROSS
NORTHERN PORTIONS OF THE AREA TUESDAY NIGHT INTO WEDNESDAY. A
DRIER NORTHWEST FLOW WILL DEVELOP FOR THE LATTER PART OF THE WEEK.


&&

.DISCUSSION...BROAD STORM SYSTEM IS CENTERED OVER NEVADA THIS
EVENING...BUT HAS BEEN BRINGING WIDESPREAD RAIN TO UTAH AND
SOUTHWEST WYOMING OUT AHEAD OF IT. SATELLITE INDICATES A WELL
DEFINED BACK EDGE TO THE PRECIP OVER SOUTHWEST UTAH. AS THE LOW
MOVES INTO UTAH OVERNIGHT AND TOMORROW...FOCUS OF THE PRECIP WILL
SHIFT EAST...THOUGH PIVOTING OF THE LOW WILL MOVE SOME MOISTURE
BACK INTO NORTHWEST UTAH.

WITH THE DEEPLY MOIST AIRMASS OVER THE STATE...STORMS TODAY
PRODUCED HEAVY RAINFALL WHICH CAUSED AREAS OF FLASH FLOODING OVER
SOUTHERN AND EASTERN PORTIONS OF THE FORECAST AREA. RADAR
INDICATES THAT COVERAGE OF PRECIP HAS DECREASED AND IT HAS
WEAKENED OVERALL...BUT THE THREAT OF HEAVY RAINFALL CONTINUES
OVERNIGHT. GOING FLASH FLOOD WATCH COVERS THE GREATEST THREAT
AREAS WELL. OVERALL...CONCERN FOR HEAVY RAIN SHIFTS INTO EASTERN
UTAH OVERNIGHT INTO THE EARLY MORNING.

MODELS INDICATE THE CENTER OF THE LOW WILL MOVE INTO THE AREA
TOMORROW AFTERNOON/EARLY EVENING AND ASSOCIATED COLD POOL
INSTABILITY WILL ALLOW FOR SCATTERED CONVECTION TO FIRE OVER THE
REGION AGAIN. TRAILING SHORTWAVE ENERGY ON THE BACKSIDE OF THE LOW
WILL KEEP A THREAT OF PRECIPITATION OVER PRIMARILY NORTHERN AND
EASTERN UTAH ON MONDAY. A TRAILING TROUGH BEHIND THE MAIN SYSTEM
WILL KEEP A THREAT OF PRECIP OVER AT LEAST NORTHERN AND CENTRAL
UTAH THROUGH THE MIDDLE OF THE UPCOMING WEEK.

UPDATED POPS EARLIER TO ACCOUNT FOR CURRENT TRENDS. NO ADDITIONAL
UPDATES PLANNED.

&&

.AVIATION...AT THE SLC TERMINAL...VFR CONDITIONS SHOULD PREVAIL
DURING THE NIGHTTIME HOURS WITH CIGS LIKELY REMAINING AT OR BELOW
7000 FT AGL. WINDS WILL PRIMARILY BE OUT OF THE EAST SOUTHEAST
THROUGH THE NIGHT...THOUGH THE RAIN WILL CAUSE WIND DIRECTIONS TO BE
PERIODICALLY ERRATIC AND GUSTY AT TIMES.

&&

.FIRE WEATHER...A LOW PRESSURE SYSTEM IS BRINGING WIDESPREAD WETTING
RAIN TO UTAH. THIS WIDESPREAD RAIN WILL CONTINUE INTO THE
OVERNIGHT HOURS...WITH SHOWERS LINGERING ACROSS PARTS OF THE AREA
THROUGH SUNDAY. MOIST CONDITIONS WILL LIKELY CONTINUE INTO THE
BEGINNING OF THE WORK WEEK...AS WEAKER WEATHER DISTURBANCES BRING
A CONTINUED CHANCE OF RAIN SHOWERS THROUGH WEDNESDAY...ESPECIALLY
ACROSS NORTHERN UTAH. DRIER AND WARMER WEATHER WILL RETURN FOR THE
END OF THE WEEK.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...FLASH FLOOD WATCH UNTIL 6 AM MDT SUNDAY FOR UTZ010-012>014-020-
     021-517-518.

WY...NONE.
&&

$$

PUBLIC...TRAPHAGAN
AVIATION...STRUTHWOLF
FIRE WEATHER...SCHOENING

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)


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