Area Forecast Discussion
Issued by NWS St. Louis, MO

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FXUS63 KLSX 251136
AFDLSX

AREA FORECAST DISCUSSION...UPDATED AVIATION
NATIONAL WEATHER SERVICE ST LOUIS MO
636 AM CDT Mon Aug 25 2014

.SHORT TERM:  (Through Late This Afternoon)
Issued at 335 AM CDT Mon Aug 25 2014

No changes to heat headlines this morning as conditions to
persist across the region through Tuesday. For today, highs will
be in the mid to upper 90s with heat index values between 100 and
110. Will see some isolated storms possible this afternoon over
the eastern Ozarks, so kept mention there.

Byrd

.LONG TERM:  (Tonight through Sunday)
Issued at 335 AM CDT Mon Aug 25 2014

Very warm and muggy conditions once again tonight with lows only
dipping down into the low to mid 70s. By Tuesday pattern begins to
weaken as next frontal boundary approaches region. Tuesday will
still be hot and humid with highs 90s and heat index values
between 100 and 110. The threat of isolated activity to persist on
Tuesday but expand across entire forecast area by Tuesday
afternoon.

The extended models continue to show upper level ridge flattening
out over area with frontal boundary trying to push through region.
Front never fully moves through til towards end of the week. In the
meantime, will see chances of showers and thunderstorms through the
period with temperatures slowly cooling down. By Friday, highs will
be in the 80s everywhere and remain in the 80s through the weekend.

Byrd

&&

.AVIATION:  (For the 12z TAFs through 12z Tuesday Morning)
Issued at 624 AM CDT Mon Aug 25 2014

High pressure aloft will continue to dominate weather across mid-
Mississippi Valley bringing mostly clear skies and hot/humid
conditions. VFR conditions to continue outside of thunderstorms
and fog. Isolated storms again possible today...especially for
eastern Ozarks but likely will stay south of terminals. Light fog
will quickly dissipate at KCPS this morning only to return tonight
as well as KSUS. Winds will remain light (aob 10 kts) and range
from the southeast to south/southwest.

Specifics for KSTL:

VFR conditions to continue outside of thunderstorms. Isolated
storms again possible today...especially for eastern Ozarks but
likely will stay south of Lambert Field. Winds will remain light
(aob 10 kts) and range from the southeast to south/southwest.

Gosselin

&&

.LSX WATCHES/WARNINGS/ADVISORIES:
MO...HEAT ADVISORY until 8 PM CDT Tuesday FOR Audrain MO-Boone MO-
     Callaway MO-Cole MO-Crawford MO-Franklin MO-Gasconade MO-
     Iron MO-Knox MO-Lewis MO-Madison MO-Marion MO-Moniteau MO-
     Monroe MO-Montgomery MO-Osage MO-Ralls MO-Reynolds MO-
     Shelby MO-St. Francois MO-Ste. Genevieve MO-Warren MO-
     Washington MO.

     EXCESSIVE HEAT WARNING until 8 PM CDT Tuesday FOR Jefferson MO-
     Lincoln MO-Pike MO-St. Charles MO-St. Louis City MO-St.
     Louis MO.

IL...HEAT ADVISORY until 8 PM CDT Tuesday FOR Adams IL-Brown IL.

     EXCESSIVE HEAT WARNING until 8 PM CDT Tuesday FOR Bond IL-
     Calhoun IL-Clinton IL-Fayette IL-Greene IL-Jersey IL-
     Macoupin IL-Madison IL-Marion IL-Monroe IL-Montgomery IL-
     Pike IL-Randolph IL-St. Clair IL-Washington IL.

&&

$$

WFO LSX






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