Area Forecast Discussion
Issued by NWS Northern Indiana

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000
FXUS63 KIWX 281722
AFDIWX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTHERN INDIANA
122 PM EDT SAT MAR 28 2015

.SYNOPSIS...
ISSUED AT 117 PM EDT SAT MAR 28 2015

STRONG HIGH PRESSURE WILL BE OVERHEAD TODAY...AND WILL MOVE
SOUTHEAST TO SOUTHERN OHIO LATER TONIGHT AS A FRONTAL SYSTEM
MOVES QUICKLY EASTWARD THROUGH THE NORTHERN PLAINS. HIGH
TEMPERATURES WILL BE IN THE UPPER 30S. LOWS TONIGHT WILL DIP BACK
INTO THE 20S.

&&

.SHORT TERM...(TODAY AND TONIGHT)
ISSUED AT 440 AM EDT SAT MAR 28 2015

EXTREMELY DRY AIRMASS OVHD TODAY WITH PWAT VALUES ONLY A FEW
HUNDREDTHS ABOVE REGIONAL RECORD MINIMA FOR THIS TIME OF YEAR.
WITH SHORTWAVE RIDGING ALOFT NEAR FULL INSOLATION POTNL WILL
RESULT AND SHOULD ALLOW FOR DIURNAL PLUS REBOUND...HIR THAN
NAM/MET MOS WITH APPARENT/OVERTLY STRONG SURFACE BASED
INVERSION/STABILITY ISSUES. PREFERENCE SIDED MORE TOWARDS RUC13
OFFERING GREATER DEPTH/STEEPNESS OF AFTN LAPSE RATES SFC-8H. WITH
4-6C MODERATION OF 8H TEMPERATURE PROFILES...HAVE GIVEN SLIGHT
NUDGE TO AFTN MAX TEMPS/ACQUIESCE TO LATE MARCH SOLAR ANGLE AS
CORE OF LLVL THERMAL TROF CONTS EWD SHUNT THROUGH LWR GRTLKS TO
UPSTATE NY/ERN PA LATER TODAY. LITTLE MORE THAN A FEW HIGH CI
CLOUDS LATER TONIGHT INADVOF HIGHLY PROGRESSIVE PAC NW SYSTEM MOVG
INTO THE UPR MIDWEST BY DAYBREAK. AGAIN SIDED SLIGHTLY WARMER WITH
MIN TEMPS OWING TO CONT LLVL WAA ALONG WITH UPTICK IN SFC GRADIENT
FLOW BY DAYBREAK.

&&

.LONG TERM...(SUNDAY THROUGH FRIDAY)
ISSUED AT 440 AM EDT SAT MAR 28 2015

AN UPPER LEVEL TROF OF PACIFIC ORIGIN WILL TOP THE WESTERN CONUS
RIDGE AND MOVE ACROSS THE FORECAST AREA SUNDAY. THE NAM HAS
TRENDED MUCH WARMER IN THE LOW LEVELS THE PAST 24 HOURS...AND IS
NOW SIMILAR TO THE GFS. GIVEN THE LATEST BUFKIT THERMAL
PROFILES...VIRTUALLY ALL OF THE PRECIPITATION SHOULD BE ALL RAIN.
THERE IS AN OUTSIDE CHANCE FOR A BRIEF PERIOD OF FREEZING RAIN
SUNDAY MORNING...BUT FOR NOW HAVE KEPT FREEZING RAIN OUT DUE TO
UNCERTAINTIES AND VERY LIMITED DURATION.

FOR THE REST OF THE PERIOD...TWO MORE SYSTEMS ARE EXPECTED TO
TRANSVERSE THE AREA THIS UPCOMING WEEK. THE FIRST SYSTEM SHOULD
BE VERY WEAK AND LITTLE PRECIPITATION IS EXPECTED. KEPT A MENTION
OF A RAIN AND SNOW MIX OVER NORTHERN AREAS WHERE 850 MB
TEMPERATURES WILL BE CLOSE TO 0C. A STRONGER UPPER TROF SHOULD BE
ABLE TO TAP MORE MOISTURE WITH A GOOD CHANCE FOR RAIN BY
THURSDAY. THE GFS AND CANADIAN EXTENDED ANALOGS SUPPORT
ANOMALOUSLY STRONG HIGH ZONAL FLOW DEVELOPING LATE THIS PERIOD
ACROSS THE MIDWEST...THE UPPER MIDWEST AND THE UPPER GREAT LAKES
REGIONS. THIS SHOULD ALLOW TEMPERATURES TO RISE ABOVE NORMAL BY
THE MIDDLE OF THE WEEK.

&&

.AVIATION...(FOR THE 18Z TAFS THROUGH 18Z SUNDAY AFTERNOON)
ISSUED AT 117 PM EDT SAT MAR 28 2015

VFR CONDITIONS EXPECTED THROUGH THE PERIOD AS HIGH PRESSURE MOVES
ACROSS THE AREA. AS RIDGE AXIS SHIFTS EAST OF THE AREA THIS
EVENING...WINDS WILL BECOME SOUTHERLY. A COLD FRONT WILL APPROACH
THE AREA FROM THE WEST TOMORROW MORNING WITH AN INCREASE IN
MID/HIGH CLOUD COVER AND GUSTY WINDS. PRECIP CHANCES WILL ARRIVE
AT THE TERMINALS JUST AFTER THIS FCST PERIOD.

&&

.IWX WATCHES/WARNINGS/ADVISORIES...
IN...NONE.
MI...NONE.
OH...NONE.
LM...GALE WARNING FROM 11 AM TO 5 PM EDT SUNDAY FOR LMZ043-046.

&&

$$

SYNOPSIS...MURPHY/NG
SHORT TERM...MURPHY
LONG TERM...SKIPPER
AVIATION...NG


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