Area Forecast Discussion
Issued by NWS Northern Indiana

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FXUS63 KIWX 261933

Area Forecast Discussion
National Weather Service Northern Indiana
233 PM EST Sun Feb 26 2017

Issued at 222 PM EST Sun Feb 26 2017

A series of systems will impact the region starting Monday night,
each one bringing increasing temperatures, moisture and rain
chances. Highs by Tuesday are expected to reach the upper 50s to
lower 60s. Colder air will arrive by Thursday with chances for
snow showers lingering through the end of the week.


.SHORT TERM...(This Evening through Monday)
Issued at 222 PM EST Sun Feb 26 2017

Weak disturbance passing through with little more than some
increase clouds and locally gusty winds. Conditions should remain
dry with clearing skies/diminishing winds tonight. Highs will be
several more degrees warmer on Monday with highs in the middle 40s
to around 50. Clouds will increase in the SE with an area of light
rain passing just outside out area. Kept a mention of some
sprinkles at best in the far SE.


.LONG TERM...(Monday Night through Sunday)
Issued at 222 PM EST Sun Feb 26 2017

Warm front will surge north Monday night into Tuesday and bring
at least a chance of showers with it. Differences then begin after
this point with track of surface low and resultant
thermal/moisture profiles key to rain/storm chances into
Wednesday. Models agree on sharp trough digging into the region in
response to 120+ kt 300 mb jet streak with some indications of a
period of a coupled jet structure. This will cause rapid
cyclogenesis somewhere across the Great Lakes with track of
surface from anywhere from U.P. of Michigan to across our NW
areas. SWODY3 has the area in a marginal risk for severe Tuesday
night. While the chance exists, concerned that best moisture may
be cut off to the south along the Ohio River where convection may
be ongoing (and likely stronger). Have changed little from overall
forecast for now, leaving mention of thunder in Tuesday night and
adding on Wednesday in the SE.

Colder air will stream southeast behind the system and bring snow
showers chances back to the area. Exact evolution of lake effect
potential still up in the air with fast moving wave dropping SE in
the flow to bring a chance for snow to the area. Models still vary
on impacts from the system, but should bring at least some
enhancement to any lake effect precip that may be ongoing. Chances
diminish quickly into the weekend as flow becomes more zonal.


.AVIATION...(For the 18Z TAFS through 18Z Monday Afternoon)
Issued at 1153 AM EST Sun Feb 26 2017

Vfr conditions this period as expansive sfc ridge holds across the
OH valley. Gusty sw winds this aftn will diminish rapidly toward


LM...Gale Warning until 7 PM EST this evening for LMZ043-046.



LONG TERM...Fisher

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