Area Forecast Discussion
Issued by NWS Denver/Boulder, CO

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FXUS65 KBOU 042000
AFDBOU

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
200 PM MDT FRI SEP 4 2015

.SHORT TERM...(THIS EVENING THROUGH SATURDAY)
ISSUED AT 200 PM MDT FRI SEP 4 2015

STRONG UPPER LEVEL SW FLOW WILL CONTINUE INTO SATURDAY BRINGING
MOISTURE INTO THE STATE. SHOWERS AND THUNDERSTORMS OVER THE
MOUNTAINS WILL CONTINUE INTO THE EARLY EVENING WITH SOME MAKING
THEIR WAY OVER THE PLAINS MAINLY WEST OF I-25 AND NORTH OVER
LARIMER COUNTY. BRIEF MODERATE RAIN WITH GUSTY WINDS UP TO 30 MPH
CONTINUE TO BE THE MAIN THREATS. STORMS WILL LAST INTO THE EVENING
HOURS BEFORE DISSIPATING LEAVING MOSTLY CLOUDY SKIES. THIS WILL
KEEP OVERNIGHT TEMPERATURES A LITTLE WARMER THAN LAST NIGHT WITH
LOWS IN THE UPPER 50S TO LOWER 60S. UPPER LEVEL FORCING OVER THE
MOUNTAINS COMBINED WITH LINGERING MOISTURE WILL HELP TO DEVELOP
SHOWERS AND THUNDERSTORMS IN THE AFTERNOON ON SATURDAY. SOUTHERLY
FLOW AT THE SURFACE WILL KEEP THE PLAINS MOSTLY DRY BUT SOME
STORMS COULD MAKE THEIR WAY OFF THE HIGHER TERRAIN BRINGING A FEW
SHOWERS AND GUSTY WINDS TO THE URBAN CORRIDOR. TEMPERATURES WILL
BE CLOSER TO SEASONAL NORMALS WITH HIGHS IN THE MID 80S FOR THE
PLAINS AND 50S TO 60S FOR THE MOUNTAINS.

.LONG TERM...(SATURDAY NIGHT THROUGH FRIDAY)
ISSUED AT 200 PM MDT FRI SEP 4 2015

AN UPPER LEVEL RIDGE WILL REMAIN OVER THE SOUTHERN PLAINS SATURDAY
AND SUNDAY WHILE AN UPPER LEVEL LOW MOVES ACROSS THE NORTHERN
ROCKIES. A SOUTHWEST FLOW WILL PREVAIL SATURDAY NIGHT. SCATTERED TO
ISOLATED THUNDERSTORMS THAT DEVELOPED SATURDAY AFTERNOON WILL
DISSIPATE DURING THE EVENING. AS THE UPPER LEVEL LOW MOVES EAST-
NORTHEAST OVER THE NORTHERN ROCKIES...FLOW ALOFT WILL SHIFT A LITTLE
MORE WESTERLY AND PUSH A WEAK COLD FRONT THROUGH COLORADO.
TEMPERATURES WILL BE SLIGHTLY COOLER BEHIND THE FRONT WITH HIGHS IN
THE LOWER TO MID 80S FOR SUNDAY AND MONDAY. AIRMASS WILL BE DRIER
AND PLAN ON KEEPING THE FORECAST DRY SUNDAY AND MOST OF MONDAY.
MAYBE ENOUGH MOISTURE AND INSTABILITY FOR A FEW WEAK SHOWERS AND
STORMS MONDAY AFTERNOON...MAINLY OVER FAR NORTHEAST COLORADO. THE
DRIER AIR WILL LEAD TO COOL OVERNIGHT LOWS.

FLOW ALOFT WILL BECOME WESTERLY MONDAY NIGHT AS A SHORT WAVE TROUGH
MOVE ACROSS WYOMING AND MONTANA. ANOTHER COLD FRONT WILL ALSO DROP
SOUTH THROUGH THE AREA. THIS WILL BRING COOLER TEMPERATURES FOR
TUESDAY. THERE WILL BE A CHANCE FOR SHOWERS AND STORMS BEHIND THE
FRONT TUESDAY AFTERNOON/EVENING...MAINLY OVER THE HIGHER TERRAIN AND
PALMER DIVIDE.

THE RIDGE OVER THE SOUTHERN PLAINS WILL SLOWLY MIGRATE WESTWARD NEXT
WEEK AND EVENTUALLY BE CENTERED OVER THE DESERT SOUTHWEST LATE NEXT
WEEK. THIS WILL CAUSE FLOW ALOFT TO TURN NORTHWESTERLY. EXPECT THIS
TO BRING NEAR NORMAL TEMPERATURES AND DRY CONDITIONS. A SURFACE HIGH
OVER THE PLAINS WILL BRING AN EASTERLY LOW LEVEL FLOW THURSDAY AND
FRIDAY. CAN`T RULE OUT THIS BRINGING ENOUGH MOISTURE FOR A FEW
SHOWERS AND STORMS SO WILL HAVE LOW POPS IN THE FORECAST FOR LATE
DAY CONVECTION.

&&

.AVIATION...(FOR THE TAFS THROUGH 00Z SATURDAY LATE AFTERNOON)
ISSUED AT 200 PM MDT FRI SEP 4 2015

VFR CONDITIONS WILL ARE EXPECTED FOR ALL AIRPORTS THROUGH THE
PERIOD. THERE CONTINUES TO BE A CHANCE FOR ISOLATED SHOWERS
BETWEEN 23 AND 02Z WITH GUSTY WINDS UP TO 25 MPH INTO THE EVENING
HOURS. CEILINGS WILL GET DOWN TO AROUND 080 WITH THE ONSET OF THE
SHOWERS AND WILL LINGER OVERNIGHT. DRAINAGE WINDS ARE EXPECTED BY
06Z TO 07Z THIS EVENING WITH CEILINGS REMAINING INTO SATURDAY
MORNING.

&&

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

$$

SHORT TERM...BOWEN
LONG TERM...MEIER
AVIATION...BOWEN



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