Area Forecast Discussion
Issued by NWS St. Louis, MO

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FXUS63 KLSX 021106

606 AM CDT Tue Jun 2 2015

.SHORT TERM:  (Through Late This Afternoon)
Issued at 344 AM CDT Tue Jun 2 2015

Hi pressure over the Great Lakes Region continues to push cool air
into the Mississippi Valley.  Persistent cloud cover is trying to
clear out from the northeast at this time, and there is a large area
of clear sky across most of our Illinois counties.  However, the
clearing may have come to a halt for the time being and clouds will
likely persist for the remainder of the pre-dawn hours.  Once the
sun comes up and we start to get some heating, I think the clouds
will start to thin and scatter out.  Diurnal CU looks pretty likely
this afternoon, especially across much of southern and central
Missouri where drier air has had less chance to scour out the low
level moisture.  Temperatures should be warmer today than Monday,
though still below normal due to the lingering clouds and cool
east-northeast flow.


.LONG TERM:  (Tonight through Monday)
Issued at 344 AM CDT Tue Jun 2 2015

Little change to the long term forecast since previous forecast.
The upper level ridge currently over the Great Plains tries to build
over the Mississippi Valley Wednesday through Friday, though the
ridge axis never seems to quite make it up across eastern
Missouri/Illinois, it does look strong enough to keep the majority
of the area dry through Wednesday night.  Chance of preicp starts to
increase Thursday from central and northeast Missouri across the
remainder of the area through Friday as the ridge aloft retrogrades
back across the Plains and the flow aloft becomes northwesterly.
Should see a few disturbances move through in the northwest flow
causing thunderstorms as they pass.  The best chance for storms may
be Sunday/Sunday night with the best looking wave of the bunch which
actually produces a surface front.  Temperatures will be highly
dependent on convection through the period, but it generally looks
warm with highs in the low to mid 80s and lows in the 60s.



.AVIATION:  (For the 12z TAFs through 12z Wednesday Morning)
Issued at 604 AM CDT Tue Jun 2 2015

Expect gradual improvement of MVFR/VFR stratus today as high
pressure and June sun angle work on the cloud cover. Light
northeast wind to become east.





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