Area Forecast Discussion
Issued by NWS St. Louis, MO

Home | Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
FXUS63 KLSX 182023

323 PM CDT Thu Sep 18 2014

.SHORT TERM:  (Through Late Tonight)
Issued at 321 PM CDT Thu Sep 18 2014

High pressure centered across the Great Lakes continues to advect
dry low level airmass into the region, which along with the
September sun was able to break the stratus up across Illinois and
the eastern half of Missouri.  Expect there could be some valley fog
that develops overnight, but otherwise quiet weather expected with a
light southeast wind.


.LONG TERM:  (Friday through Next Thursday)
Issued at 321 PM CDT Thu Sep 18 2014

By Friday, surface ridge to move off to the east allowing warmer
southerly flow to return to the region. Highs on Friday will be in
the mid to upper 70s and in the low to mid 80s on Saturday.

In the meantime, next weather system to move in by Saturday
afternoon with showers and thunderstorms developing and spreading
southeast across region as cold front moves through. Best chances of
precipitation will be Saturday night before tapering off Sunday

On Sunday after system exits, begin to cool back down as next ridge
of high pressure builds in. Cooler and drier weather to persist
through the middle of next week with highs in the 70s and lows in
the 50s.


.AVIATION:  (For the 18z TAFs through 18z Friday Afternoon)
Issued at 1207 PM CDT Thu Sep 18 2014

Stratus breaking up as drier air advects into the region from the
east and is aided by September sunshine. Will see this trend
continue into the afternoon with most locations becoming clear by
evening. Some concern for valley fog tonight and have kept some
MVFR visibility at a few of the favored terminals. Otherwise,
light east/southeast wind to continue.

Specifics for KSTL:

Stratus breaking up and should see sky clear by this evening.
Light east wind will become southeast on Friday.



WFO LSX is the U.S. government's official web portal to all federal, state and local government web resources and services.