Area Forecast Discussion
Issued by NWS St. Louis, MO

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FXUS63 KLSX 271735
AFDLSX

AREA FORECAST DISCUSSION...UPDATED AVIATION
NATIONAL WEATHER SERVICE ST LOUIS MO
1235 PM CDT Wed May 27 2015

.SHORT TERM:  (Through Late This Afternoon)
Issued at 328 AM CDT Wed May 27 2015

Weak frontal boundary to slowly slide southeast through region
today. Initial activity over northern portions of forecast area to
exit before zone issuance. Next round firing up over southwestern MO
and moving east northeast towards forecast area. HRRR keeps activity
along and south of I-70 this morning before diminishing. So highest
pops will be over southern portions of forecast area. Otherwise,
warm conditions to persist with highs in the low to mid 80s.

Byrd

.LONG TERM:  (Tonight through Tuesday)
Issued at 328 AM CDT Wed May 27 2015

Weak ridging to build in tonight with precipitation tapering off.
Did keep slights/low chance pops for southern portions of forecast
area, but for the most part forecast area should be dry overnight.
On Thursday, more vigorous shortwave to approach from the
southwest. Will see increasing pops with best chances over central
and southern Missouri during the day, then chances to increase
beginning Thursday night as deepening upper level trof over the
Rockies begins to slide towards region. Best chances will be
Friday through Saturday, before tapering off on Sunday.

Highs will be in the 80s for the rest of the work week with lows in
the 60s. Cooler air to filter in behind this system with highs only
in the upper 60s on Sunday, then warm back up into the upper 70s to
low 80s by next Tuesday.

Byrd

&&

.AVIATION:  (For the 18z TAFs through 18z Thursday Afternoon)
Issued at 1225 PM CDT Wed May 27 2015

VFR conditions expected into Thursday morning at all TAF sites.
Light west to northwest winds this afternoon will become variable
around sunset...then southeasterly Thursday morning. MVFR ceilings
near 3000 feet AGL will move into KCOU TAF site by around 15Z
Thursday...and reach the KSTL metro TAF sites by around 20Z.

Specifics for KSTL: VFR conditions with light west winds this
afternoon. Winds will become light and variable overnight...then
southeasterly by around 15Z Thursday. Ceilings around 3000 feet
should approach the TAF site by 20Z Thursday.

Browning

&&

.LSX WATCHES/WARNINGS/ADVISORIES:
MO...NONE.
IL...NONE.
&&

$$

WFO LSX





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