Area Forecast Discussion
Issued by NWS Northern Indiana

Home | Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

FXUS63 KIWX 181932

Area Forecast Discussion
National Weather Service Northern Indiana
232 PM EST Thu Jan 18 2018

Issued at 220 PM EST Thu Jan 18 2018

Warmer weather expected into the weekend with the next chance of
rain as a system moves into the area Sunday night into Monday.
Cooler weather on the back side of the storm with rain changing
to snow on Tuesday and some lake effect snow into mid week.


.SHORT TERM...(This Evening through Friday)
Issued at 220 PM EST Thu Jan 18 2018

Quiet weather in the short term with gradually warming temperature
trend into the weekend. Moisture starved mid level wave dropping
down from Wisconsin this afternoon may lead to an increase in
upper level clouds late this afternoon and evening but main energy
is well up into Michigan. Southwesterly winds remain moderate
through the overnight and despite mostly clear skies and snow pack
low temperatures will remain near 20.


.LONG TERM...(Friday Night through Thursday)
Issued at 220 PM EST Thu Jan 18 2018

Not much change in the previous discussion as main concern in the
long term period is synoptically forced system that moves into the
region Sunday night into Monday.

Southwesterly warm air advection into the first half of the
weekend moderates temperatures into the 40s to near 50 by Sunday.
Combined with warmer temperatures and positive moisture advection
expect snow pack to greatly reduce over the next couple days.
Patchy fog possible Sat night due to warm air over snow pack but
left it out because not sure how long it will stick around as
current snow pack will decrease over next few days.

As system departs to our north back side wraparound moisture with
some lake enhancement possible on Tuesday. Temperatures begin to
cool with a more northwesterly flow changing the precip type to
snow by Tuesday. A few chances of lake effect snow possible next
week with another gradual warmup by the end of the forecast


.AVIATION...(For the 18Z TAFS through 18Z Friday Afternoon)
Issued at 1131 AM EST Thu Jan 18 2018

VFR conditions will persist through the TAF period as a large high
pressure area drifts across the Gulf states. The pressure gradient
between this system and a developing surface low over south
central Canada will keep brisk southwest winds over northern
Indiana. Have continued a low level wind shear group given in
response to these factors.




SHORT TERM...Heidelberger
LONG TERM...Heidelberger

Visit us at

Follow us on Facebook...Twitter...and YouTube at: is the U.S. government's official web portal to all federal, state and local government web resources and services.