Area Forecast Discussion
Issued by NWS Wilmington, OH

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FXUS61 KILN 262032

Area Forecast Discussion
National Weather Service Wilmington OH
432 PM EDT FRI AUG 26 2016

Warm and humid conditions will continue through the weekend. In
the warm and humid airmass on Saturday, a few afternoon
thunderstorms will be possible. By Sunday into Monday, several
weak upper level disturbances will provide a little better chance
for a few showers and thunderstorms in the area.


Isolated convection has developed along the remnants of an
outflow boundary. Have kept the 20 PoPs across se IN and srn OH
for the late afternoon into the early evening hours. The
convection should die with the loss of daytime heating.

With the lingering low level humidity, temperatures will be in
the upper 60s across portions of central OH to the lower 70s
along the Ohio River.


H5 ridge centered over the central Appalachians builds a little
to the north on Saturday. With dewpoints in the lower 70s, we see
an increase in the instability Saturday afternoon. Because of the
position of the H5 ridge, there is a lack of forcing across the
fa, so limited pops to 20 to 30 percent in se IN and wrn OH.

Temperatures will be a few degrees cooler in the extreme wrn
locations because of the pcpn chances so held high temperatures
in the upper 80s. Farther e, highs should make the lower 90s. this
will push heat indices in the upper 90s to around 100, so will
adjust the wording in the HWO.

Saturday`s convection could bleed over in the early evening hours
before it dissipates. For Sunday, we get a little more upper
support as some vortices rotate around the ridge. Have chance
PoPs for the entire fa.

Muggy conditions are expected again on Sunday with highs from the
upper 80s nw to the lower 90s se. Heat indices on Sunday will be
similar to Saturday.


The proximity of a weak and somewhat nebulous surface boundary over
the region through early Wednesday will continue to necessitate the
potential for diurnally driven thunderstorm activity peaking in the
late day in a continued humid airmass.

Upper level high over the southeastern U.S. will flatten out and
retrograde into the Arklatex region as northwest flow sets up over
the northeastern U.S. with ridging in the Great Plains. The
northwest flow will help push a surface front through the Ohio
Valley on Wednesday, ushering in another welcome dry and cooler
period to start out September. Highs in the upper 80s to around 90
will be found Monday and Tuesday, drop into the 80s Wednesday and be
a more pleasant low to mid 80s for the end of the week. Min temps in
the upper 60s to lower 70s Monday and Tuesday will drop into the
lower 60s by weeks end.


Scattered to broken cumulus at the beginning of the period will
dissipate with loss of heating. Will just be left with some
cirrus. Expect some mist/fog to develop at the usually more
favorable locations. All sites will return to VFR late in the TAF

OUTLOOK...Thunderstorms possible through Wednesday...mainly in
the afternoon and evening.




LONG TERM...Franks
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