Area Forecast Discussion
Issued by NWS Northern Indiana

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426
FXUS63 KIWX 242251
AFDIWX

Area Forecast Discussion
National Weather Service Northern Indiana
651 PM EDT Sat Jun 24 2017

.SYNOPSIS...
Issued at 207 PM EDT Sat Jun 24 2017

Mainly dry and cooler conditions are in store for the remainder of
the weekend into early next week. An isolated shower will be
possible through Monday, but expect most locations to remain dry.
Lows tonight and Sunday night will be in the 50s, with highs on
Sunday and Monday in the upper 60s to lower 70s. Fair weather and
gradual warming are expected Tuesday and Wednesday before a more
active weather pattern returns Thursday into Friday.

&&

.SHORT TERM...(Late This Afternoon through Monday)
Issued at 207 PM EDT Sat Jun 24 2017

Mainly dry and unseasonably cool weather will persist through Monday
as a large/broad upper level trough settles into the Great Lakes
region. There will be a few low chances for isolated rain showers
through the period. Steepening low level lapse rates augmented by
weak forcing (from a mid level impulse leading a much more
pronounced circulation over MN) may force a few isolated showers
this afternoon, mainly over ne IN/sc Lower MI/far nw OH where some
weak instability may be realized.

The aforementioned upper low over MN will translate ese through the
lower Great lakes later tonight, with a few showers possibly
surviving into northern portions of the forecast area later this
evening/overnight on leading edge of height falls/weak trough. Most
locations will likely remain dry this afternoon into tonight.

Sunday will be another mainly quiet and slightly cooler day as
another surge of cold advection rushes in behind tonight`s
secondary trough. Shower chances once again look very low with the
local area likely in between shortwaves. More of the same then
into Sunday night and Monday, though will continue with low
chances for isolated showers/sprinkles (mainly north) as
additional shortwaves pivot through in cool/cyclonic flow.

&&

.LONG TERM...(Monday Night through Saturday)
Issued at 207 PM EDT Sat Jun 24 2017

Temperatures will moderate back closer to seasonal norms into the
middle of the week as heights build aloft. A more unsettled/active
pattern then returns Thursday through Saturday as a series of
pacific waves interact with a low level frontal zone/theta-e
ridge laying out from IA east into the Lower/Central Great Lakes.

&&

.AVIATION...(For the 00Z TAFS through 00Z Sunday Evening)
Issued at 643 PM EDT Sat Jun 24 2017

VFR conditions expected to cont through the taf period. A shrtwv
over the mid MS valley will move east across nrn IN tonight.
SHRA/TS associated with this system should grdly diminish with
loss of heating but a remnant strato cu deck may move over SBN
late tonight with a brief -shra not out of the question. Westerly
gradient will remain fairly strong for this time of year, with
gusts in the 20-25kt range again Sunday aftn. Diurnal heating will
lead to an increase in Cu by midday Sunday with a period of vfr
ceilings and isolated shra psbl, but not included in tafs at this
juncture.


&&

.IWX WATCHES/WARNINGS/ADVISORIES...
IN...Beach Hazards Statement through Sunday evening for INZ003.

MI...Beach Hazards Statement through Sunday evening for MIZ077.

OH...NONE.
LM...Small Craft Advisory until 8 PM EDT Sunday for LMZ043-046.

&&

$$

SYNOPSIS...Steinwedel
SHORT TERM...Steinwedel
LONG TERM...Steinwedel
AVIATION...JT


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