Area Forecast Discussion
Issued by NWS St. Louis, MO

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FXUS63 KLSX 292025
AFDLSX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE ST LOUIS MO
325 PM CDT Tue Jul 29 2014

.SHORT TERM:  (Through Late Tonight)
Issued at 323 PM CDT Tue Jul 29 2014

Hi pressure continues to dominate our weather.  Expect diurnal
cumulus field to dissipate quickly this evening and the sky should
remain mostly clear this evening.  With light wind and low relative
humidity, expect excellent radiational cooling.  MOS temps look
agreeable so have followed closely.


Carney


.LONG TERM:  (Wednesday through Next Tuesday)
Issued at 323 PM CDT Tue Jul 29 2014

Unseasonably amplified trough across the eastern two-thirds of the
CONUS will continue to bring cool...and for the most part dry weather
through the next seven days. Timing subtle/nearly indistinguishable
ripples embedded within northwest flow aloft is very difficult but
cannot rule out some isolated showers/weak storms diurnally driven
through Saturday. Best "chance" may come on Friday/Saturday due to
slightly better instability as mid/upper level
heights/temperatures fall.

Longwave pattern will finally begin to breakdown late this weekend
and into early next week as combination of tropical energy in the
Atlantic and sharp trough crossing south of Hudson Bay act to
significantly dampen Bermuda high. Upper-level heights and
low-level temperatures will rise across the mid-Mississippi
Valley with a corresponding climb up to more seasonal temperatures/
humidity levels.


Gosselin

&&

.AVIATION:  (For the 18z TAFs through 18z Wednesday Afternoon)
Issued at 1230 PM CDT Tue Jul 29 2014

VFR flight conditions and light west-northwest flow will continue
to prevail. Scattered to broken clouds with bases around 5000 FT
will dissipate by early evening. River fog will be possible again
tonight, so included vicinity fog in the KSUS TAF. Expect river
fog to dissipate quickly after sunrise.

Specifics for KSTL:

VFR flight conditions and light west-northwest flow will continue
to prevail. Scattered to broken clouds with bases around 5000 FT
will dissipate by early evening.

Carney

&&

.PRELIMINARY POINT TEMPS/POPS:
Saint Louis     63  84  64  85 /   5  10  10  20
Quincy          58  80  59  81 /   5  10  10  10
Columbia        60  82  60  84 /   5  10   5  10
Jefferson City  60  81  61  84 /   5  10   5  10
Salem           57  82  59  83 /   5  10  10  20
Farmington      57  79  58  82 /   5  10  10  20

&&

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

$$

WFO LSX





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