Area Forecast Discussion
Issued by NWS Northern Indiana

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FXUS63 KIWX 121735

Area Forecast Discussion
National Weather Service Northern Indiana
135 PM EDT Wed Aug 12 2020

Issued at 300 AM EDT Wed Aug 12 2020

Quiet weather conditions are expected through the end of the week
with lows in the upper 50s to mid 60s and highs in the 80s. Low
chances for showers and storms return this weekend, followed by
cooler weather early next week.


.SHORT TERM...(Today through Thursday Night)
Issued at 300 AM EDT Wed Aug 12 2020

Confluent westerly flow aloft over the Great Lakes today will give
way to upper level height rises tomorrow, allowing high pressure to
linger over the Great Lakes region through the period. This will be
the primarily influence on our weather through at least Friday
morning as dry/stable air holds within low level easterly flow.
Temperatures will generally be near to slightly above normal.


.LONG TERM...(Friday through Tuesday)
Issued at 300 AM EDT Wed Aug 12 2020

Models do diverge a bit later Friday into Saturday in handling of a
leftover OH Valley shear/moisture axis and an approaching northern
stream trough/cold front. The 00z GFS lifts this moisture axis
into southern/eastern zones during this time, while the ECMWF/GEM
and the bulk of ensemble guidance continues to hold these potential
forcing mechanisms south and west of the local area during this
time. Opted to hold a little below NBM PoPs as a result.

The aforementioned northern stream trough likely amplifies into the
Eastern US Sunday into early next week. This transition will force a
cold front through sometime Sunday or early Monday with a chance for
showers/storms, followed by dry/cooler wx early next week.


.AVIATION...(For the 18Z TAFS through 18Z Thursday Afternoon)
Issued at 135 PM EDT Wed Aug 12 2020

VFR conds to prevail at both terminal sites through the fcst
period. High level clouds this aftn for both sites though some
sctd diurnal cu as well at KFWA. High pressure over the Gtlks
region this morning will slowly move east overnight though winds
will remain an east component at less than 10 kts.




SHORT TERM...Steinwedel
LONG TERM...Steinwedel

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