Area Forecast Discussion
Issued by NWS Indianapolis, IN

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000
FXUS63 KIND 161028
AFDIND

Area Forecast Discussion
National Weather Service Indianapolis IN
628 AM EDT Mon Jul 16 2018

.UPDATE...
The AVIATION section has been updated below.

&&

.SYNOPSIS...
Issued at 345 AM EDT Mon Jul 16 2018

A frontal zone will move through the area later today, with
scattered thunderstorms possible, particularly this afternoon into
early evening. High pressure in the wake of the front will provide
a less humid and pleasant period mid week, before a large low
pressure system moves into the Great Lakes, returning daily
thunderstorm chances to the area late week into the weekend.

&&

.NEAR TERM /Today/...
Issued at 345 AM EDT Mon Jul 16 2018

Another warm and humid day expected across central Indiana ahead
of an approaching cold frontal zone. A few pop up showers and
storms cannot be ruled out this morning, but expect more coverage
of convective activity this afternoon into early evening. Will
limit pops to less than likely owing to coverage uncertainties.

Temps should be in the mid to upper 80s, which will combine with
humid airmass to push peak heat index values well into the 90s in
some spots today.

&&

.SHORT TERM /Tonight through Wednesday Night/...
Issued at 345 AM EDT Mon Jul 16 2018

After a lingering chance this evening as the front passes, the
remainder of the short term will be dry as high pressure dominates
the area. Dewpoints will fall significantly, and the mid week
period will be quite pleasant weather wise, with highs near to
slightly below normal and relatively low humidity.

Consensus numbers were in the ballpark and generally acceptable.

&&

.LONG TERM (Thursday Through Sunday)...
Issued at 213 AM EDT Mon Jul 16 2018

Models are close enough that the model blend initialization
was accepted for most items.

An upper level low will dominate the long term, bringing chances for
rain each day during the period. At the surface, a cold front will
move through the area in the Friday-Saturday time frame.

Models are similar early in the period, then begin to vary more with
the placement of the upper system. This leads to a lower confidence
forecast for the weekend.

Although confidence is high that scattered convection will move in
with the upper and surface systems, feel that confidence isn`t high
enough to go higher than chance PoPs any one period. Thus removed
any likely PoPs that the initialization tried to put in.

&&


.AVIATION (Discussion for the 161200Z TAF Issuance)...
Issued at 628 AM EDT Mon Jul 16 2018

MVFR/IFR or worse conditions expected early in the period, then VFR
outside of convection by 16Z or so.

Low clouds and fog are slowly spreading northeast across the area at
the moment, already impacting KHUF and KBMG. Some uncertainty on how
these will impact the KIND & KLAF sites. For now plan to compromise
and just go MVFR at KIND/KLAF, while keeping IFR or worse at the
other sites. Can`t rule out KIND going IFR for a brief period.

Fog/ceilings will lift during the morning and should be VFR most
sites by 16Z or so.

Isolated convection will be around this morning, but more coverage
is expected this afternoon with a cold front. Will use VCTS as
needed.

&&

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

&&

$$

SYNOPSIS...Nield
NEAR TERM...Nield
SHORT TERM...Nield
LONG TERM...50
AVIATION...50



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