Area Forecast Discussion
Issued by NWS Denver/Boulder, CO

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FXUS65 KBOU 120915
AFDBOU

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
315 AM MDT FRI SEP 12 2014

.SHORT TERM...(TODAY THROUGH TONIGHT )
ISSUED AT 315 AM MDT FRI SEP 12 2014

A MIX OF DRIZZLE AND VERY LIGHT SNOW ACROSS THE FOOTHILLS AND
PLAINS IS GRADUALLY DIMINISHING EARLY THIS MORNING. SHOULD SEE
THE VERY LIGHT PRECIP CONTINUE TO DECREASE IN COVERAGE THROUGH THE
EARLY MORNING RUSH AS AIRMASS CONTINUES TO DRY PER LATEST
SATELLITE IMAGERY AND GPS INTEGRATED PRECIPITABLE WATER TRENDS.
SNOW ACCUMULATION LAST NIGHT WAS LIMITED TO A FEW SPOTS MAINLY
IN/RIGHT NEXT TO THE FOOTHILLS AND HIGHER RIDGES...AND ONLY VERY
LIGHT AMOUNTS AS CLOUD DEPTH WAS NOT SUFFICIENT TO PRODUCE
SIGNIFICANT SEEDER-FEEDER INTERACTION.

THE LOW LEVEL CLOUD DECKS WILL LINGER THROUGH THE MORNING BUT
GRADUALLY LIFT/BREAK THROUGH THE AFTERNOON HOURS. MOISTURE DEPTH
IS ALREADY SHOWING SIGNS OF LIFTING TO THE NORTH. MODEST SUN
ANGLE WILL AID MIXING/DISSIPATION...AND ONLY LIGHT UPSLOPE
COMPONENT SHOULD ALLOW THE ANTICIPATED BREAKUP. A COUPLE HOURS OF
SUNSHINE THIS AFTERNOON WOULD ALSO HELP TEMPS RISE INTO THE 50S SO
RAISED THE FORECAST MAX TEMPS A FEW DEGREES.

FOR TONIGHT...MOSTLY CLEAR SKIES SHOULD PREVAIL SETTING UP ANOTHER
COLD NIGHT. FROST ADVISORIES MAY BE NEEDED FOR WELD/EASTERN
LARIMER COUNTY AREAS WHERE STRONG INVERSIONS WILL DEVELOP IN LIGHT
WIND REGIME. THERE MAY BE ENOUGH MOISTURE FOR PATCHY FOG INSTEAD.
FARTHER SOUTH AND EAST...SOUTHERLY WINDS INCREASE WHICH WOULD
INCREASE MIXING AND LIMIT FROST THREAT OVER THE EASTERN PLAINS AND
PALMER DIVIDE.

.LONG TERM...(SATURDAY THROUGH THURSDAY)
ISSUED AT 315 AM MDT FRI SEP 12 2014

SATURDAY MORNING WILL BEGIN WITH PATCHY FOG AND FROST OVER THE
PLAINS...BEFORE TEMPERATURES WARM TO NEAR NORMAL READINGS UNDER
MOSTLY CLEAR SKIES THROUGH THE DAY. MOUNTAINS MAY SEE SOME FAIR
WEATHER CUMULUS IN THE AFTERNOON...BUT OVERALL NO PRECIPITATION IS
EXPECTED.

WARM ADVECTION AND AN INCREASE IN MOISTURE WILL MOVE OVER THE
AREA SUNDAY WITH TEMPERATURES WARMING TO ABOVE NORMAL...READINGS
IN THE LOW TO MID 80S FOR THE PLAINS AND 60S AND 70S FOR THE
MOUNTAINS. EXPECT ISOLATED SHOWERS AND THUNDERSTORMS OVER THE HIGH
TERRAIN IN THE AFTERNOON AND EVENING WITH A SLIGHT CHANCE TO SEE
THEM MOVE OVER THE PLAINS. A COLD FRONT PUSHED BY A WEAK DISTURBANCE
WILL MOVE IN AFTER MIDNIGHT. THIS MAY PRODUCE SHOWERS AND A FEW
STORMS POSSIBLE AHEAD OF IT BEFORE STRATUS FILLS IN OVER THE
PLAINS TOWARD MORNING. THE COLD FRONT WILL COOL TEMPERATURES ABOUT
10 DEGREES FOR MONDAY WITH A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS TOWARD THE FOOTHILLS AND OVER THE MOUNTAINS.

TUESDAY THROUGH THURSDAY WILL WARM BACK TO OR ABOVE NORMAL
TEMPERATURES AS AN UPPER RIDGE MOVES FROM THE GREAT BASIN OVER THE
STATE. RESIDUAL MOISTURE UNDER THE RIDGE WILL ALLOW FOR A SLIGHT
CHANCE OF SHOWERS AND THUNDERSTORMS IN THE AFTERNOONS AND EARLY
EVENINGS.

&&

.AVIATION...(FOR THE TAFS THROUGH 12Z SATURDAY MORNING)
ISSUED AT 315 AM MDT FRI SEP 12 2014

AREAS OF LIGHT DRIZZLE OR FLURRIES MAY LINGER TIL AROUND 12Z
BEFORE DECREASING. THREAT OF LIGHT PRECIPITATION SHOULD BE OVER BY
14Z-15Z WITH UNRESTRICTED VISIBILITIES AND INCREASING CEILINGS
THEREAFTER. VISUAL LANDING CONDITIONS ARE EXPECTED BY 21Z-23Z AS
CLOUDS CONTINUE TO LIFT/DISSIPATE. EAST WINDS MOST OF THE DAY
UNDER 10 KTS SWITCHING MORE SOUTHERLY OVERNIGHT. ONLY A SLIGHT
CHANCE OF PATCHY FOG TOWARD 12Z SATURDAY AT KBJC AND KDEN IF WEAK
DENVER CYCLONE DEVELOPS.

&&

.BOU WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

$$

SHORT TERM...BARJENBRUCH
LONG TERM...KRIEDERMAN
AVIATION...BARJENBRUCH



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