Area Forecast Discussion
Issued by NWS Northern Indiana

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FXUS63 KIWX 250823

Area Forecast Discussion
National Weather Service Northern Indiana
423 AM EDT Fri May 25 2018

Issued at 412 AM EDT Fri May 25 2018

High pressure will continue to provide fair and warm weather
conditions through today. Afternoon highs will soar into middle
to upper 80s today. Temperatures, humidity and rain chances will
be on the increase for the holiday weekend. Highs each day will
range between the middle 80s and lower 90s. There is a low chance
for showers and thunderstorms Friday night into Saturday. Mainly
dry conditions are expected otherwise into early next week.


.SHORT TERM...(Today and Tonight)
Issued at 420 AM EDT Fri May 25 2018

Primary focus on upstream shortwave moving into Upper Great Lakes.
Less than optimal timing/tied closer to highest diurnal stability
to preclude anything more than chance showers/lesser chance
thunderstorms. Upstream temperatures yesterday suggest higher end
of guidance with near full insolation potential today.


.LONG TERM...(Saturday through Thursday)
Issued at 420 AM EDT Fri May 25 2018

Primary focus on holiday with first extended period of seasonably
warm/hot temperatures. In wake of shortwave passage will continue
to maintain only diurnally driven chances Sunday afternoon. Then
dry/hot Monday as intervening rex block/building heights over the
southern portion of the Upper Great Lakes ensues early next week.
Eventually ridging begins to falter by midweek and allows tropical
remnant circultion to lift northward into the Ohio Valley with
return chances of shra/tsra.


.AVIATION...(For the 06Z TAFS through 06Z Friday Night)
Issued at 1243 AM EDT Fri May 25 2018

No flight concerns through the period with light and variable
winds overnight increasing somewhat to 5 to 10 kts from the
southwest as limited mixing of weak wind field occurs. A few
cirrus will start to move in ahead of a weak system during the
afternoon hours with lower cigs (still 10Kft-15Kft) edging in
towards the end of the forecast period. A few showers, possibly a
rumble of thunder could be in the offing outside the valid period.




LONG TERM...Murphy

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