Area Forecast Discussion
Issued by NWS Northern Indiana

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000
FXUS63 KIWX 262026
AFDIWX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTHERN INDIANA
326 PM EST MON JAN 26 2015

.SYNOPSIS...
ISSUED AT 355 AM EST MON JAN 26 2015

WEAK HIGH PRESSURE WILL BE ACROSS THE AREA TODAY. CLOUDS ARE
EXPECTED TO INCREASE THIS AFTERNOON AND TONIGHT. THERE IS A
CHANCE FOR VERY LIGHT SNOW ACROSS NORTHEAST ILLINOIS...INDIANA...AND
FAR SOUTHWEST LOWER MICHIGAN THIS EVENING AND TONIGHT. HIGHS TODAY
WILL BE IN THE IN THE 20S...BUT AREAS WHICH SAW SEVERAL INCHES OF
SNOW MAY STRUGGLE TO GET OUT OF THE TEENS. LOWS TONIGHT WILL BE IN
THE TEENS...EXCEPT COLDER SINGLE DIGITS IN THOSE SAME AREAS WITH
DEEPER SNOW.

&&

.SHORT TERM...(THIS EVENING THROUGH TUESDAY)
ISSUED AT 325 PM EST MON JAN 26 2015

AREA OF SHEARED CYCLONIC VORTICITY EMBEDDED WITHIN THE LEFT EXIT
REGION OF A 140 KT 3H JET WILL CONTINUE TO DROP INTO THE MID
MS/WESTERN OH VALLEYS THIS EVENING INTO THE EARLY OVERNIGHT. A
NARROW BAND OF -SN ORIENTED NW TO SE ACROSS WI-IL (AS OF 20Z) ALONG
THE ASSOCIATED FGEN INDUCED CIRCULATION/TIGHTENING THERMAL GRADIENT
MAY CLIP OUR FAR WSW WITH A LIGHT COATING OF SNOW DURING THIS TIME.
LIMITING FACTOR FOR ANYTHING MORE THAN A MID CHC POP HERE WILL BE A
PRONOUNCED LOW LEVEL DRY WEDGE WITH MUCH BETTER CHANCES JUST WEST OF
THE IWX CWA. DRY OUTSIDE OF A FEW FLURRIES OTHERWISE TONIGHT.

STRONG SUBSIDENCE/RAPID HEIGHT RISES WITH WEAK CONVERGENCE/PCPN
SETTLING WELL SOUTH SHOULD ENSURE A DRY TUESDAY AS WESTERN/CENTRAL
LAKES LOW LEVEL RIDGING BECOMES RE-ESTABLISHED. CLOUD COVER REMAINS
THE MAIN UNCERTAINTY WITH SIG MID LVL DRYING HOPEFULLY ALLOWING FOR A
N-S CLEARING TREND. WILL TREND TOWARD PARTLY CLOUDY WORDING FOR NOW
IN HOPE THAT BOUNDARY LAYER STRATOCU THINS/BREAKS UP.
OTHERWISE...ONLY MINOR TWEAKS MADE TO TEMPS.

&&

.LONG TERM...(TUESDAY NIGHT THROUGH MONDAY)
ISSUED AT 325 PM EST MON JAN 26 2015

WILL BE ISSUED SHORTLY...

&&

.AVIATION...(FOR THE 18Z TAFS THROUGH 18Z TUESDAY AFTERNOON)
ISSUED AT 1148 AM EST MON JAN 26 2015

WEAK HIGH PRESSURE OVER THE GREAT LAKES AND PRONOUNCED DRY LAYER
IN THE LOWEST 5 KFT WILL KEEP TERMINALS MAINLY VFR INTO TOMORROW.
AREA OF LIGHT SNOW AND ASSOCIATED VIS/CIG RESTRICTIONS ALONG A
TIGHT THERMAL GRADIENT SHOULD REMAIN JUST WEST OF SBN/FWA LATE
THIS AFTN INTO TONIGHT AS SHEARED VORT MAX SLIDES SE THROUGH
ILLINOIS. ALTHOUGH CANNOT RULE OUT A FEW FLURRIES DURING THIS TIME
ACROSS NORTHERN INDIANA. OTHERWISE...WINDS WILL GENERALLY REMAIN
UNDER 6 KNOTS INTO TONIGHT. BE LIGHT/VARIABLE.

&&

.IWX WATCHES/WARNINGS/ADVISORIES...
IN...NONE.
MI...NONE.
OH...NONE.
LM...NONE.
&&

$$

SYNOPSIS...LASHLEY
SHORT TERM...STEINWEDEL
LONG TERM...SKIPPER
AVIATION...STEINWEDEL


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