Area Forecast Discussion
Issued by NWS Salt Lake City, UT

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
000
FXUS65 KSLC 210402
AFDSLC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1002 PM MDT WED AUG 20 2014

.SYNOPSIS...THE AIRMASS OVER THE FORECAST AREA WILL SLOWLY DRY
THROUGH FRIDAY...ALTHOUGH CONDITIONS WILL REMAIN UNSETTLED. A
COLD TROUGH WILL MOVE ACROSS NORTHERN UTAH OVER THE WEEKEND
BRINGING COOLER CONDITIONS AND A WET START TO THE WEEKEND.

&&

.DISCUSSION...LARGE-SCALE PATTERN CONSISTS OF A CUTOFF LOW OVER THE
SOUTHERN CALIFORNIA COAST WHILE A MEAN TROUGH EXTENDS OVER THE
PACIFIC NORTHWEST AND NORTHERN ROCKIES. SLIGHT DRYING HAS OCCURRED
ACROSS SOUTHERN UTAH...WITH LATEST GOES ESTIMATED PWAT AROUND 0.6 TO
0.75 INCHES. SOME STORMS DEVELOPED OVER SOUTHERN UTAH THIS AFTERNOON
WHICH PRODUCED LOCALLY HEAVY RAIN...BUT MOST OF THESE HAVE TAPERED
OFF WITH A CONTINUED DOWNWARD TREND IN ACTIVITY EXPECTED THE REST OF
THE NIGHT.

MEANWHILE ACROSS THE NORTH...AN EMBEDDED SHORTWAVE DISTURBANCE
RIPPLING ACROSS SOUTHERN IDAHO PROVIDED ADDITIONAL LIFT WHICH
PRODUCED SOME STRONG STORMS EARLIER THIS AFTERNOON/EVENING. THIS
WAVE WILL CONTINUE TO CROSS FAR NORTHERN UTAH THROUGH THE NIGHT...SO
NORTHERN UTAH WILL CONTINUE TO SEE SCATTERED STORMS. HOWEVER...WITH
INSTABILITY HAVING DECREASED SOMEWHAT...THE STORMS WILL NOT BE AS
STRONG AS THEY WERE EARLIER...BUT BRIEF HEAVY RAIN WILL REMAIN
POSSIBLE ACROSS PORTIONS OF NORTHERN UTAH TONIGHT.

ANTICIPATE COVERAGE OF STORMS TO BE A BIT LESS TOMORROW AS THE
AIRMASS CONTINUES TO DRY AND UTAH REMAINS LARGELY BETWEEN THE
INFLUENCE OF BOTH THE NORTHERN AND SOUTHERN BRANCH SYSTEMS. A
RELATIVELY SIGNIFICANT TROUGH DROPPING OUT OF THE NORTHWEST IS
EXPECTED TO BRING INCREASED STORMINESS BACK TO THE AREA FRIDAY NIGHT
THROUGH SATURDAY.  MADE MINOR UPDATES MAINLY TO POP/SKY BASED ON
CURRENT OBSERVATIONAL TRENDS AND LATEST RAP/HRRR FORECASTS.

&&

.AVIATION....NORTHERLY WINDS ARE EXPECTED AT THE SLC TERMINAL
THROUGH 06Z THEN GRADUALLY DECREASE AND SHIFT TO SOUTHERLY BETWEEN
06 AND 07Z. CIGS ARE EXPECTED TO REMAIN ABOVE 7K FT AGL THROUGH THE
TAF PERIOD. THERE IS A 20 PERCENT CHANCE OF THUNDERSTORMS IMPACTING
THE TERMINAL THROUGH 08Z.

&&

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

$$

CHENG/STRUTHWOLF

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)


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.