Area Forecast Discussion
Issued by NWS Indianapolis, IN

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000
FXUS63 KIND 061743
AFDIND

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1243 PM EST SAT FEB 6 2016

.UPDATE...
THE AVIATION SECTION HAS BEEN UPDATED BELOW

&&

.SYNOPSIS...
ISSUED AT 239 AM EST SAT FEB 6 2016

MILD TEMPERATURES WILL CONTINUE THIS WEEKEND...BUT A COLD FRONT AND
A LARGE UPPER LEVEL TROUGH WILL BRING A RETURN TO WINTER CONDITIONS
FOR THE EARLY PART OF NEXT WEEK...WITH FREQUENT CHANCES FOR SNOW.
LATER IN THE WEEK NEXT WEEK TEMPERATURES WILL WARM UP TO CLOSER TO
AVERAGE.

&&

.NEAR TERM /REST OF TODAY/...
ISSUED AT 939 AM EST SAT FEB 6 2016

AFTER A HAZY...SUNNY START...A SMALL AREA OF PREDOMINANT CLOUDS AT
6 TO 8KFT HAS ENCOMPASSED THE WESTERN HALF OF THE FORECAST AREA
IN ASSOCIATION WITH A WEAKENING WAVE ALOFT. 1430Z TEMPS REMAINED
IN THE 20S.

VERY LITTLE CHANGE NEEDED FOR THE MORNING UPDATE. THE AREA OF
CLOUDS WILL SHIFT EAST ACROSS THE FORECAST AREA THROUGH EARLY
AFTERNOON...PRODUCING A 2 TO 3 HOUR PERIOD OF MOSTLY CLOUDY SKIES
AT MOST LOCALES. THE SUN WILL RETURN FOR THE AFTERNOON WITH MILD
S/SW FLOW AS RIDGING ALOFT EXPANDS INTO THE REGION FROM THE WEST
BY LATE DAY. LOW LEVEL THERMALS SUPPORT A SEASONABLY MILD DAY WITH
HIGHS WARMING INTO THE 40S ACROSS CENTRAL INDIANA.

ZONE AND GRID UPDATES OUT.

&&

.SHORT TERM.../TONIGHT THROUGH MONDAY NIGHT/
ISSUED AT 239 AM EST SAT FEB 6 2016

FOCUS IS ON CHANCES FOR PRECIPITATION THROUGH THE PERIOD. MODELS
ARE CLOSE ENOUGH THAT A BLEND WAS USED.

CLOUDS WILL INCREASE ONCE AGAIN TONIGHT AHEAD OF AN APPROACHING COLD
FRONT...BUT THE THICKER CLOUDS WILL NOT ARRIVE UNTIL LATE. WENT WITH
A BLEND OF MODEL TEMPERATURES FOR LOWS...WHICH IS A BIT COOLER THAN
MOS.

A COLD FRONT WILL MOVE INTO THE AREA SUNDAY AFTERNOON. CLOUDS WILL
THICKEN AHEAD OF IT...BUT OVERALL MOISTURE IS NOT GREAT.
GFS/CANADIAN BRING IN RAIN DURING THE AFTERNOON...WHILE NAM/ECMWF
ARE DRY. WITH THE GULF CUT OFF...AT THE MOMENT FEEL THAT ODDS OF
RAIN ARE TOO LOW TO MENTION. WILL CONTINUE WITH A DRY FORECAST
SUNDAY.

THE FRONT WILL FINISH MOVING THROUGH ON SUNDAY NIGHT. UPPER SUPPORT
INCREASES WITH THE APPROACH OF AN UPPER LOW. THIS FORCING SHOULD BE
ENOUGH TO ALLOW FOR CHANCE POPS WITH THE FRONT DURING THE
EVENING...WITH HIGHEST POPS EAST NEAREST THE FRONT. FORCING FROM THE
UPPER SYSTEM WILL BE ENOUGH TO KEEP CHANCE POPS ALL AREAS OVERNIGHT
SUNDAY NIGHT...WITH HIGHEST POPS WEST CLOSER TO THE UPPER LOW.

MONDAY AND MONDAY NIGHT...AN UPPER LOW WILL MOVE INTO THE GREAT
LAKES...AND PIECES OF ENERGY WILL ROTATE AROUND IT. STRONG COLD
ADVECTION WILL MOVE IN AS WELL. THE COLD AIR WILL SQUEEZE OUT WHAT
MOISTURE IS LEFT IN THE AREA. THUS EXPECT SCATTERED SNOW SHOWERS ALL
AREAS MONDAY AND MONDAY NIGHT.

SNOW SQUALL PARAMETER INDICATES POTENTIAL FOR SOME INTENSE SQUALLS
MONDAY...WHICH DEPENDING ON EXACT TIMING COULD HAVE A SIGNIFICANT
IMPACT ON TRAVELERS ACROSS THE AREA. WILL CONTINUE TO HIGHLIGHT IN
THE HAZARDOUS WEATHER OUTLOOK. THERE IS THE POTENTIAL FOR SNOW
ACCUMULATIONS OF 1-2 INCHES BY LATE MONDAY NIGHT.

&&

.LONG TERM /TUESDAY THROUGH FRIDAY/...
ISSUED AT 215 AM EST SAT FEB 6 2016

MODELS AND ENSEMBLES IN GOOD AGREEMENT THAT THE UPPER TROUGH WILL BE
PUSHING OFF TO THE EAST AT THE START OF THE PERIOD WHICH WILL RESULT
IN LINGERING SMALL SNOW CHANCES ENDING FROM WEST TO EAST LATE
TUESDAY AND TUESDAY NIGHT. THEN...SURFACE HIGH PRESSURE WILL RESULT
IN DRY BUT COLD WEATHER THROUGH THURSDAY NIGHT. REGIONAL BLEND
TEMPERATURES IN THE 20S AND LOWS IN THE TEENS LOOK GOOD WITH COLD
LOW LEVEL THERMALS. COULD BE EVEN A BIT COLDER THAN THE BLEND
DEPENDING ON THE EXPECTED SNOW PACK AND HOW MUCH CLEARING OCCURS.
FINALLY...A CLIPPER SYSTEM COULD BRING MORE LIGHT SNOW TO THE AREA
ON FRIDAY.

&&

.AVIATION /DISCUSSION FOR THE 06/1800Z TAF ISSUANCE/...

ISSUED AT 1239 PM EST SAT FEB 6 2016

VFR CONDITIONS WILL PREVAIL FOR DURATION OF TAF PERIOD...BUT MID
CLOUDS WILL INCREASE TOMORROW MORNING AHEAD OF A COLD FRONT. IN
ADDITION...SOUTHWEST WINDS WILL STRENGTHEN AROUND MID MORNING
TOMORROW WITH SUSTAINED SPEEDS OF 10 TO 12 KTS AND GUSTS UP TO 20
KTS.

&&

.IND WATCHES/WARNINGS/ADVISORIES...NONE.

&&

$$

SYNOPSIS...50
NEAR TERM...RYAN
SHORT TERM...50
LONG TERM....MK
AVIATION...TDUD


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