National Weather Service Weather Forecast Office

• Home
• Site Map
• News
• Organization
• Search for: NWS All NOAA 

000
FXUS65 KSLC 190245
AFDSLC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
845 PM MDT FRI APR 18 2014

.SYNOPSIS...A WEAK SYSTEM WILL REMAIN ACROSS THE REGION THROUGH
THE WEEKEND. A STRONGER STORM WILL IMPACT THE AREA DURING THE
MIDDLE OF NEXT WEEK.

&&

.DISCUSSION...A LOW AMPLITUDE SHORT WAVE TROF IS MOVING OUT OF THE
ROCKIES AND INTO THE NRN PLAINS THIS EVE WHILE A WEAK CLOSED LOW
OVER SRN CA TRACKS SLOWLY EAST. THE NRN BRANCH TROF SENT A SHALLOW
COLD FRONT INTO NRN UT THAT IS STALLED NEAR A DELTA TO PRICE LINE
THIS EVE. NARROW BANDS OF RAIN DEVELOPED NORTH OF THIS FRONT
TODAY BUT HAVE PRETTY MUCH DISSIPATED. SOME ISOLATED WEAK
CONVECTION SPREAD INTO THE NWRN DESERTS FROM ERN NV LATE IN THE
DAY AND A FEW OF THESE SHOWERS PERSIST THIS EVE BUT DO NOT EXPECT
THEM TO LAST PAST MIDNIGHT.

THE CLOSED LOW HAS SPREAD CONVECTIVE SHOWERS INTO SRN UT BUT IT IS
LIKELY THAT NOT MUCH RAIN IS REACHING THE GROUND DUE TO DRY LOW
LEVELS. EXPECT THESE SHOWERS TO INCREASE OVERNIGHT AS ADDITIONAL
MOISTURE AND LIFT SPREADS INTO SRN UT AHEAD OF THE LOW AND THEY
SHOULD START TO REACH THE SURFACE AS THE LOW LEVELS MOISTEN UP
LATER TONIGHT.

THESE SHOULD EXIT THE CWA TOMORROW MORNING BUT EXPECT SCATTERED
CONVECTION TO FIRE DURING THE AFTN...MAINLY OVER HIGHER TERRAIN.
THE FLOW ALOFT IS VERY WEAK SO DONT EXPECT THESE SHOWERS TO MOVE
TOO FAR FROM WHERE THEY FORM BEFORE DISSIPATING. ANOTHER ROUND OF
DIURNAL CONVECTION IS EXPECTED SUN BUT RIDGING WILL BE MOVING INTO
THE AREA DURING THE DAY AND THIS WILL WORK AGAINST THE CONVECTION
KEEPING IT MORE ISOLATED.

THE RIDGE AXIS SHIFTS EAST MON AND THE AIRMASS WARMS STRONGLY
UNDER AN INCREASING SWLY FLOW. THIS FLOW BECOMES STRONG TUE WITH
A GOOD CHANCE OF WARNING LEVEL SOUTHERLY WINDS AHEAD OF A STRONG
COLD FRONT. EQUALLY STRONG WINDS ARE ALSO POSSIBLE BEHIND THIS
FRONT ACROSS THE SALT FLATS AND INTO THE WASATCH FRONT DURING THE
AFTN/EARLY EVE.

UPDATED FORECASTS EARLIER TO ADJUST POPS AND SKY A BIT BUT MADE NO
MAJOR CHANGES. NO ADDITIONAL UPDATES PLANNED.

&&

.AVIATION...NORTHERLY WINDS WILL CONTINUE AT THE SLC TERMINAL
THROUGH AROUND AROUND 05Z THEN BECOME LIGHT SOUTHERLY OR LIGHT AND
VARIABLE. THERE IS A 30 PERCENT CHANCE THAT WINDS REMAIN
LIGHT NORTHERLY THROUGH 08-09Z. VFR CONDITIONS WILL PREVAIL WITH
CIGS REMAINING ABV 7000 FT.

&&

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

$$

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)