Area Forecast Discussion
Issued by NWS St. Louis, MO

Home | Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary Off
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

000
FXUS63 KLSX 010845
AFDLSX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE ST LOUIS MO
345 AM CDT Mon Jun 1 2015

.SHORT TERM:  (Through Late This Afternoon)
Issued at 344 AM CDT Mon Jun 1 2015

Surface ridge centered over southeast Canada continues to filter
cool air down through the great lakes into the Mississippi Valley.
Meanwhile, the shortwave moving over the lower-mid Mississippi
Valley will continue to provide support for clouds to hang around
today.  The combination of these two features will result in another
cool day across Missouri and Illinois with temperatures running 5 to
10 degrees below normal.  Expect no additional precip today given
the low level cool/dry flow even with the shortwave overhead.

Carney

.LONG TERM:  (Tonight through Sunday)
Issued at 344 AM CDT Mon Jun 1 2015

Warming trend still looks on track for Tuesday through the end of
the week.  The upper level ridge over the Rockies will build
eastward through the latter half of the week.  This will allow
warmer air to build up across the southern Plains and into the
Missouri Valley.  Guidance builds 850mb temps to 14-16C across the
area by Thursday which should mix down to the low to mid 80s.  Don`t
see much chance for precip across the area through Thursday with the
upper level ridge providing large scale subsidence.  However, medium
range guidance pushes the ridge axis back over the Plains Friday and
into the weekend.  Current indications are that a couple of
shortwaves will move across the area in northwest flow aloft Friday
through Sunday.  With these disturbances in the area combined with
warm temperatures and increasing boundary layer moisture, the going
forecast for scattered thunderstorms Friday through Sunday still
looks good.

Carney

&&

.AVIATION:  (For the 06z TAFs through 06z Monday Night)
Issued at 1100 PM CDT Sun May 31 2015

Rain associated with an upper level disturbance and an inverted
surface trough should remain se of the taf sites late tonight. The
persistent stratus cloud deck will continue at the taf sites with
the current ceilings around 1500 feet lowering to around 1000
feet late tonight. Ceiling heights may be more variable at UIN as
some drier low level air has filtered into northern MO and west
central IL.  The cloud ceiling will gradually rise on Monday to
around 2000-3000 feet Monday afternoon, and eventually into the
VFR catagory Monday evening. Nely surface winds will continue
through the period with a surface ridge extending from WI and MI
southwest into northeast MO shifting only slowly eastward.

Specifics for KSTL: The cloud ceiling will lower late tonight to
around 1000 feet, then rise to around 2500 feet Monday afternoon.
The cloud ceiling should eventually scatter out Monday night.
Nely surface wind will continue through the period.

GKS

&&

.PRELIMINARY POINT TEMPS/POPS:
Saint Louis     70  58  76  61 /   5   5   5   5
Quincy          69  54  74  56 /   0   5   5   5
Columbia        68  55  75  58 /   0   5   5   5
Jefferson City  69  55  76  59 /   0   5   5   5
Salem           69  56  75  59 /  10   5   5   5
Farmington      68  54  74  54 /  10   5   5   5

&&

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

$$

WFO LSX






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