Area Forecast Discussion
Issued by NWS St. Louis, MO

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FXUS63 KLSX 300808

308 AM CDT Wed Jul 30 2014

.SHORT TERM: (Through Tonight)
Issued at 259 AM CDT Wed Jul 30 2014

Highs in the upper 70s to lower 80s will be around 5-10 degrees
below average for this time of year, similar to yesterday. Although
a few isolated light rain showers or sprinkles cannot be ruled
out, most areas should remain dry this afternoon. Good radiational
cooling conditions within a relatively dry air mass (Tds in the
50s) should yield another night with lows in the upper 50s to
around 60 degrees.


.LONG TERM: (Tomorrow through Tuesday)
Issued at 259 AM CDT Wed Jul 30 2014

In the continued absence of any strong signals for either
widespread precip or hot/humid conditions, there has been little
change in thinking since the previous forecast package was issued.
Ongoing northwest flow pattern will maintain cooler than average
temperatures through the end of the week and into the first part
of the weekend. Occasional ill-defined shortwaves moving through
the longwave trough might produce light rain showers or even a few
thunderstorms over the next few days, especially during the
afternoon hours. The upper air pattern begins to change over the
weekend, and temperatures/humidity are expected to warm back
towards seasonable levels next week after the departure of the
longwave trough over the eastern CONUS and the return of southerly
low-level flow over MO/IL.



.AVIATION:  (For the 06z TAFs through 06z Wednesday Night)
Issued at 1143 PM CDT Tue Jul 29 2014

Expect river fog to develop like last night that will affect KSUS.
Went ahead added IFR conditions between 10-13Z as current dewpoint
depressions are already close to what they were at this time last
night. Currently have worst conditions in a tempo group with 1/2SM
in fog, though it is possible like last night they could fall
briefly below airport minimums. Otherwise, expect mainly dry and
VFR conditions with light and variable winds.

Specifics for KSTL: Expect dry and VFR conditions with mainly
light variable wind over the next 30 hours.





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