Area Forecast Discussion
Issued by NWS Northern Indiana

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FXUS63 KIWX 251736

Area Forecast Discussion
National Weather Service Northern Indiana
136 PM EDT MON JUL 25 2016

Issued at 458 AM EDT Mon Jul 25 2016

Just a low chance of showers and thunderstorms will exist today
along and south from about Lima, Ohio to Marion, Indiana.
Otherwise a noticeable trend toward more seasonable temperatures
with lesser humidity will begin and provide welcome relief to the
oppressive heat of the past several days. The humidity will return
later in the week, along with a chance of showers and
thunderstorms from Thursday into the weekend.


.SHORT TERM...(Today and Tonight)
Issued at 445 AM EDT Mon Jul 25 2016

Stabilization beneath decaying stratiform 150-300 j/kg MLCIN
throughout forecast area this morning with primary focus shifted
well southwest with well developed mesoscale convective complex in
vicinity of KSTL. Have relegated mention of additional early am
tsra to slight chance save for far nern cwa with exiting storms
that earlier this morning exhibited supercell characteristics with
mesoscale convective vorticy giving amplification to otherwise
weak 20-30 kts effective layer shear. Only low end concern within
overturned airmass that far sern forecast area on trailing edge of
midday/early afternoon destabilization with weak/shallow
convective development along latent outflow and/or differential
heating gradient...along cold frontal boundary dropping sewd.
Better focus appears to be farther southeast today as mid level
height fall centroid pushes into Lower Great Lakes with prefrontal
trof focus extending sewd into southern Indiana. Added patchy fog
mention along/se of Maumee/Wabash basins where anticipate lagged
surface dewpoints/relative high xover temperatures collocated with
near optimal radiational cooling overnight as NE/IA centered
surface ridge builds eastward into forecast area.


.LONG TERM...(Tuesday through Sunday)
Issued at 445 AM EDT Mon Jul 25 2016

Little change in long term forecast afforded by latest blends.
Retrogression of subtropical ridge from TX panhandle to srn NV/srn
CA to promote central CONUS troffing by midweek with PAC NW wave
train providing weak plains/wrn grtlks height falls and subsequent
weak plains cyclogenesis about midweek. Initial moisture return
circuitous around CWA, with eventual push of upper 60s/lower 70s
surface dewpoints by DY4. Chance tsra pops appears centered on
DY4/5, though with upstream trof persisting into the weekend, have
little confidence in removal of lower/slight chance mention through
the weekend at this time.


.AVIATION...(For the 18Z TAFS through 18Z Tuesday Afternoon)
Issued at 132 PM EDT Mon Jul 25 2016

The cdfnt has moved through northern IN with winds wnw at both
sites. High pressure builds into the area tonight with light and
variable winds and clear skies. Do not think there will be
sufficient bndry layer moisture to be concerned about fog so did
not mention it in the fcst.


.IWX Watches/Warnings/Advisories...
MI...Beach Hazards Statement until 3 PM EDT this afternoon for MIZ077.



LONG TERM...Murphy

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