Area Forecast Discussion
Issued by NWS Northern Indiana

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000
FXUS63 KIWX 011753
AFDIWX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTHERN INDIANA
153 PM EDT WED JUL 1 2015

.SYNOPSIS...
ISSUED AT 336 AM EDT WED JUL 1 2015

HIGH PRESSURE IS BUILDING INTO THE AREA WHICH WILL KEEP MOST OF
OUR AREA DRY INTO THE WEEKEND. LOWS TONIGHT WILL BE IN THE MIDDLE
50S AND HIGHS TOMORROW WILL BE IN THE MID 70S.

&&

.SHORT TERM...(TODAY AND TONIGHT)
ISSUED AT 336 AM EDT WED JUL 1 2015

MOTHER NATURE LOOKS TO HAVE FINALLY TURNED OFF THE FAUCET ON THE
AREA AS THE FOCUS OF SHOWERS AND STORMS SHIFTS WELL SOUTH OF THE
AREA COURTESY OF HIGH PRESSURE BUILDING IN FROM THE UPPER
MISSISSIPPI VALLEY. UNTIL IT FULLY SETTLES INTO THE
REGION...LINGERING LOW LEVEL MSTR AND A FEW WEAK DISTURBANCES WILL
CAUSE CLOUD COVER ISSUES...FIRST IN THE FORM OF STRATUS...WHICH CAN
BE SEEN SLOWLY EXPANDING SOUTHWARD FROM LWR MI/LK MI/WI. HAVE KEPT
MENTION OF PATCHY FOG FOR ALL AREAS...BUT BACKED OFF "AREAS" WORDING
FOR NOW. SOME MIXING WILL TAKE PLACE THROUGH THE MORNING AS TEMPS
CLIMB INTO THE LOW TO MID 70S FOR MOST SPOTS. HOWEVER...MID LEVEL
LAPSE RATES SHOULD BE JUST ENOUGH TO ALLOW FOR CU/STRATOCU THROUGH
MUCH OF THE DAY. BACKED OFF SOMEWHAT ON INLAND EXTENT FOR THE TIME
BEING GIVEN SEVERAL HI RES MODELS SHOWING CLOUDS STICKING THROUGH
MOST OF THE AFTERNOON.

TONIGHT MODELS NOT IN AGREEMENT ON AMOUNT OF LEFT OVER MOISTURE AND
SUBSEQUENT CLOUD COVER. KEPT WITH MIDDLE OF THE ROAD PARTLY
CLOUDY/MOSTLY CLEAR AS DRIER AIR SHOULD CONTINUE TO ADVECT IN. LOWS
WILL DROP INTO THE MIDDLE 50S.

&&

.LONG TERM...(THURSDAY THROUGH TUESDAY)
ISSUED AT 336 AM EDT WED JUL 1 2015

A MUCH WELCOMED SIGH OF RELIEF WHEN PERUSING THE 00Z NWP SUITE.
EARLIER NOTED DRYING TREND CONTINUES WITH LOW LEVEL THETA-E GRADIENT
AND ASSOCIATED BELT OF ACTIVE WEATHER PUSHING JUST FAR ENOUGH SOUTH
TO GIVE OUR CWA A BREATHER FROM WET WEATHER THROUGH AT LEAST THE
WEEKEND. MID/UPPER LEVEL SHORTWAVE AND ASSOCIATED JET STREAK WILL
DIG INTO THE HIGH AMPLITUDE TROUGH OVER THE EASTERN CONUS ON
THURSDAY...TRACKING THROUGH THE SOUTHERN OHIO VALLEY PER LATEST
GUIDANCE. MEANWHILE...SHORTWAVE RIDGING WILL SLIDE OVER ONTARIO WITH
SPLIT FLOW/WEAK HIGH PRESSURE NESTLED ACROSS THE GREAT LAKES. THIS
PATTERN ALOFT AND ASSOCIATED EASTERLY LOW LEVEL FLOW SHOULD KEEP
THETA-E TROUGH IN PLACE LOCALLY WITH NO INSTABILITY BENEATH A
MODERATE SUBSIDENCE INVERSION NOTED AROUND 800MB. DRY CONDITIONS
EXPECTED TO PERSIST EVERYWHERE THROUGH AT LEAST FRIDAY MORNING WITH
JUST PARTLY CLOUDY SKIES AND HIGH TEMPS A PLEASANT MID TO UPPER 70S.
00Z GFS DOES TRY TO GLANCE OUR FAR SOUTHERN COUNTIES WITH QPF
THURSDAY NIGHT BUT IS AN OUTLIER IN THIS RESPECT AND WILL BE IGNORED.

SPLIT FLOW THEN LOOKS TO PERSIST THROUGH EARLY NEXT WEEK WITH TEMPS
SLOWLY MODERATING BACK TO SEASONAL AVERAGES. DID MAINTAIN SOME TOKEN
SLIGHT CHANCE POPS IN OUR FAR SOUTHERN COUNTIES FRIDAY AFTERNOON AS
BOTH NAM AND GFS SUGGEST MIDLEVEL VORT MAX MAY PASS JUST FAR ENOUGH
NORTH TO DRAG SOME SLIGHTLY BETTER MOISTURE INTO OUR SOUTHERN CWA
WITH MARGINAL SURFACE BASED INSTABILITY AND WEAK CVA TOUCHING OFF A
FEW SHOWERS. HAVE SERIOUS DOUBTS PRECIP WILL MAKE IT THIS FAR NORTH
THOUGH GIVEN PRIMARILY DRY EASTERLY FLOW IN BOTH GFS AND ECMWF AS
WELL AS WEAK FORCING AND LOW INSTABILITY. EVEN IF IT DOES...SHOULD
BE LIGHT...SCATTERED...AND OF LITTLE CONSEQUENCE TO FLOODING
CONCERNS. ANOTHER RIDGE LOOKS TO BUILD OVER THE GREAT LAKES LATER
THIS WEEKEND AND HAVE REMOVED ALL POPS BASED ON CONSENSUS OF LATEST
GLOBAL GUIDANCE. EVEN MONDAY COULD BE DRY AS LATEST GFS AND GEM
(EVEN ECMWF TO A LESSER EXTENT) ARE ALL MUCH SLOWER WITH NEXT COLD
FRONTAL PASSAGE. MAINTAINED LOW CHANCE POPS FOR MONDAY BUT THESE TOO
COULD BE CUT IF SLOWER/DRIER TREND CONTINUES. BEST CHANCES FOR RAIN
DONT LOOK TO RETURN UNTIL TUESDAY...ALLOWING PLENTY OF TIME FOR
FLOODING TO ABATE.

&&

.AVIATION...(FOR THE 18Z TAFS THROUGH 18Z THURSDAY AFTERNOON)
ISSUED AT 147 PM EDT WED JUL 1 2015

IFR CONDITIONS EXPECTED THROUGH THE AREA. MVFR CEILINGS ARE BEING
OBSERVED ACROSS NORTHERN ILLINOIS...BUT EXPECT THOSE LOWER CIGS TO
REMAIN SOUTH AND WEST OF BOTH KSBN AND KFWA. WINDS WILL VEER FROM
NW TO NNE DURING THE LATE EVENING AND INTO THE OVERNIGHT HOURS.

&&

.IWX WATCHES/WARNINGS/ADVISORIES...
IN...BEACH HAZARDS STATEMENT UNTIL 8 PM CDT THIS EVENING FOR INZ003.

MI...BEACH HAZARDS STATEMENT UNTIL 9 PM EDT THIS EVENING FOR MIZ077.

OH...NONE.
LM...SMALL CRAFT ADVISORY UNTIL 9 PM EDT THIS EVENING FOR LMZ043-046.

&&

$$

SYNOPSIS...BENTLEY
SHORT TERM...FISHER
LONG TERM...AGD
AVIATION...BENTLEY


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