National Weather Service Text Product Display

Area Forecast Discussion
Issued by NWS Amarillo, TX
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FXUS64 KAMA 071121 AAA
AFDAMA

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE AMARILLO TX
521 AM CST FRI MAR 7 2014

.AVIATION...
FOR THE 12Z TAFS...A COLD FRONT WILL MOVE ACROSS THE AREA LATER THIS
MORNING CAUSING WINDS TO SHIFT OUT OF THE NORTH. LOW CEILINGS WILL
LAG BEHIND IN THE EVENING. CHANCE OF WINTER PRECIP LATE TONIGHT BUT
CONFIDENCE IS CURRENTLY TO LOW TO MENTION IN TAFS...BETTER CHANCES
FOR PRECIP AT KDHT AND KGUY AFTER 00Z...LOWER CHANCES AT KAMA.

&&

.PREV DISCUSSION... /ISSUED 359 AM CST FRI MAR 7 2014/

SHORT TERM...TODAY THROUGH SATURDAY NIGHT

THE FOCUS OF THE SHORT TERM IS ON A COLD FRONT TODAY AND UPR LEVEL
SYSTEM/ASSOC PRECIP CHCS TONIGHT. FORECAST MODELS ARE IN POOR
AGREEMENT ON THE EVOLUTION OF AN APPROACHING SHRTWV TROUGH OVER THE
NEXT 24 HRS. MODEL PREFERENCE IS WITH A BLEND OF ALL MODELS NOT
NAMED NAM AS ITS PROGRESSIVE SOLUTION SEEMS UNLIKELY.

TODAY...
HIGHS WILL BE A BIT TRICKY TODAY...BUT WE CONTINUE TO FEEL LIKE
MIXING WILL BE DEEP ENOUGH BEFORE THE TRUE ARRIVAL OF COLD AIR TO
SQUEEZE OUT A GENERALLY WARM DAY, IN SPITE OF A NORTHERLY COMPONENT
WINDS AFTER MID MORNING. HIGH CLOUDS WILL LIKELY TEMPER HIGHS TO A
DEGREE. ANY PRECIP SHOULD HOLD OFF UNTIL AFTER SUNSET.

TONIGHT...
EXPECT AN INITIAL PERIOD OF RAIN SHOWERS TO AFFECT THE OK PANHANDLE
AND FAR NW TX PANHANDLE THIS EVENING WITH A TRANSITION TO SNOW
EXPECTED TO OCCUR BETWEEN 03-06Z. HAVE SIDED WITH THE COLDER AND
FASTER ECMWF WRT LOW LVL THERMAL FIELDS AS THIS MODEL HAS PROVEN
SUPERIOR IN SITUATIONS LIKE THIS IN THE PAST FEW WEEKS AND COLDER,
QUICKER JUST SEEMS LIKE THE GUT FEELING. GIVEN THIS PREFERENCE...TOP
DOWN TECHNIQUES SUGGEST A PRETTY CLEAN TRANSITION FROM RAIN TO SNOW
WITH MAYBE JUST A VERY BRIEF PERIOD OF SLEET DURING TRANSITION.

THE BEST CHCS FOR ACCUMULATIONS WILL BE IN THE OKLAHOMA PANHANDLE
TONIGHT BETWEEN ABOUT 04Z-14Z, WHERE 1 TO 2 INCHES LOOK POSSIBLE.
GIVEN POOR MODEL AGREEMENT WITH THE UPR SYSTEM...WAS RELUCTANT TO
PULL THE TRIGGER ON AN ADVISORY FOR THESE LOCATIONS, BUT GIVEN SOME
EXPECTED BLOWING AND DRIFTING AND REDUCED VISIBILITIES...THINK
CONFIDENCE IS JUST HIGH ENOUGH TO GET THE WORD OUT WITH A MILDLY
WORDED ADVISORY.

FURTHER SOUTH...CHANCES FOR SNOW ACCUMULATIONS GREATER THAN AN INCH
SEEM PRETTY LOW...AND IN FACT MOISTURE MAY LEAVE THE SNOW GROWTH
ZONE BY 12Z SAT IN THE SW HALF OF THE PANHANDLES...MEANING SOME
DRIZZLE OR FREEZING DRIZZLE MAY MIX IN, DEPENDING ON EXACT
TEMPS...WHICH SHOULD HOVER AROUND 32F DURING THE MORNING HRS.

PRECIPITATION MAY LINGER IN THE EASTERN HALF OF THE PANHANDLES
THROUGH ABOUT NOON, WITH MAINLY SNOW OR DRIZZLE/FRIZZLE EXPECTED.
HIGHS ON SATURDAY WILL BE DEPENDENT ON SNOW ACCUMULATIONS IN THE
NORTH AND PACE OF CLOUD COVER DETERIORATION IN THE WEST...BUT A
FAIRLY COLD DAY LOOKS LIKELY.

SIMPSON

LONG TERM...SUNDAY THROUGH NEXT FRIDAY

STILL A GOOD AMOUNT OF UNCERTAINTY IN THE LONG TERM AS MODELS ARE
HAVING A TOUGH TIME DEPICTING THE NEXT 36 HOURS...WHICH LEADS TO
DECREASED CONFIDENCE IN THE LONG TERM. HAVE TRENDED TOWARDS THE ECMWF
WHICH WANTS TO BRING IN A FRONT AND COLD AIR IN TUESDAY AFTERNOON
ABOUT 12 TO 24 HOURS AHEAD OF THE GFS. ECMWF LOOKS TO HAVE A LITTLE
BETTER UPPER LEVEL SUPPORT AND WANTS TO BRING IN PRECIP TO THE AREA
WHILE THE GFS KEEPS THE BRUNT OF THE PRECIP WELL OFF TO OUR EAST.
BREEZY NORTHERLY WINDS WILL ACCOMPANY THE FRONT AS IS USUAL THIS TIME
OF YEAR AND WILL KNOCK DOWN HIGH TEMPS ABOUT 20 DEGREES ACROSS THE
AREA. THERE WILL BE A CHANCE OF PRECIP BEHIND THE FRONT BUT HAVE VERY
LOW CONFIDENCE IN PRECIP TYPE AT THIS POINT. SLOW WARMING TREND
BEGINS THE SECOND HALF OF THE WEEK.

MOULTON

FIRE WEATHER...

THE PROXIMITY OF AN AREA OF LOW PRESSURE WILL KEEP WINDS GENERALLY
IN CHECK TODAY...LIKELY PRECLUDING WIDESPREAD ELEVATED FIRE WEATHER
CONDITIONS.

NEITHER ELEVATED NOR CRITICAL FIRE WEATHER CONDITIONS ARE EXPECTED
THIS WEEKEND INTO NEXT WEEK THOUGH TUESDAY WILL NEED TO BE WATCHED
IN CASE THE COLD FRONT FORECAST FOR THAT DAY MOVES THROUGH SLOWER
THAN EXPECTED AND ELEVATED FIRE WEATHER CONDITIONS CAN DEVELOP AHEAD
OF IT.

SIMPSON

&&

.AMA WATCHES/WARNINGS/ADVISORIES...
TX...NONE.
OK...WINTER WEATHER ADVISORY FROM 9 PM THIS EVENING TO 9 AM CST
     SATURDAY FOR THE FOLLOWING ZONES: BEAVER...CIMARRON...TEXAS.


&&

$$

19/09
National Weather Service Weather Forecast Office
