Area Forecast Discussion
Issued by NWS Indianapolis, IN

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FXUS63 KIND 230635
AFDIND

Area Forecast Discussion
National Weather Service Indianapolis IN
235 AM EDT Wed Aug 23 2017

.UPDATE...
The SYNOPSIS...NEAR TERM and SHORT TERM Sections have been updated
below.

&&

.SYNOPSIS...
Issued at 232 AM EDT Wed Aug 23 2017

High pressure is expected across the area through the weekend. An
upper level low may affect the area by the early part of next
week.

&&

.NEAR TERM /Today/...
Issued at 232 AM EDT Wed Aug 23 2017

Dry weather expected today as high pressure builds in from the
northwest. Some diurnal cloud development likely under the 850mb
thermal trough.

Low level thicknesses suggest the GFS MOS highs for tonight may be a
little on the cool side. Will nudge up the guidance a bit.

&&

.SHORT TERM /Tonight through Friday night/...
Issued at 232 AM EDT Wed Aug 23 2017

Fairly static upper air pattern expected during this period, as long
wave troughing sets up over the eastern parts of the country. This
will result in a dry northwest upper flow locally. Models suggest
little threat for precipitation as a large surface high drifts
slowly through the region. Will continue with a dry forecast through
Friday night.

Progged low level thicknesses suggest the GFS MOS highs for the next
couple of days are probably a little on the cool side. Will bump the
guidance highs Thursday and Friday. The guidance lows look OK.

&&

.LONG TERM /Friday Night through Tuesday/...
Issued at 232 PM EDT Tue Aug 22 2017

Unseasonably cool conditions will continue into the long term
period as high pressure dominates through the weekend. The next
chance for precipitation looks to be early next week as the
remnants of Harvey are forecast to move into the region.
Confidence is low on timing at this time, so will keep low POPs
starting on Monday.

Mostly ran with initialized temps with highs in the upper 70s and
lows in the 50s through the weekend and lower 60s early next week.
High pressure will keep the air quite comfortable with dewpoints
in the 50s before moisture return ahead of the remnants of Harvey
begin to moisten the atmosphere.

&&

.AVIATION /Discussion for the 23/06Z TAFs/...
Issued at 1151 PM EDT Tue Aug 22 2017

VFR through the period.

High pressure will begin building into the area overnight in the
wake of the departing cold front. Skies will clear and winds will
diminish. Cannot entirely rule out light MVFR fog mainly at the
outlying sites near daybreak, but at this time continue to expect
drier air to work in in time to prevent this. Will monitor trends
through the night.

Winds will be 10KT or less through the period, generally out of
the northwest.

&&

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

$$

SYNOPSIS...JAS
NEAR TERM...JAS
SHORT TERM...JAS
LONG TERM...White/Ryan
AVIATION...Nield



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