Area Forecast Discussion
Issued by NWS St. Louis, MO

Home | Current Version | Previous Version | Text Only | 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
000
FXUS63 KLSX 222038
AFDLSX

Area Forecast Discussion
National Weather Service Saint Louis MO
338 PM CDT Mon Jul 22 2019

.SHORT TERM...  (Through Late Tuesday Night)
Issued at 336 PM CDT Mon Jul 22 2019

High pressure centered over the northern Plains will drop southeast
through Tuesday and Tuesday night.  Northerly flow on the eastern
side of this high will bring cooler and drier air into the mid
Mississippi Valley through the short term.  Upstream minimum
temperatures from this morning were in the mid 50s to low 60s across
northern Iowa and Minnesota.  These temperatures agree well with
12Z MOS, so have followed it closely.

The high should keep a mostly sunny sky over the forecast area on
Tuesday. There could be some diurnal CU, but I don`t expect more
than few-scattered coverage.  Strong July sunshine should warm
temperatures into the upper 70s to low 80s.  It should be another
clear and cool night on Tuesday night as the high settles into
western Missouri with similar temperatures as tonight in the mid 50s
to low 60s.

Carney

.LONG TERM...  (Wednesday through Next Monday)
Issued at 336 PM CDT Mon Jul 22 2019

The high will drift slowly east through the end of the week.
Temperatures should slowly warm up as the Canadian high modifies.
However, below normal temperatures in the low to mid 80s are
expected through at least Thursday, with some spots in the St. Louis
metro area possibly hitting the upper 80s by Friday.  Medium range
guidance shows the center of the high over the Mid Atlantic States
by Saturday-Sunday which reestablishes southerly flow over the mid
Mississippi Valley.  This will help bring highs back into the upper
80s and low 90s for Saturday through Monday with dew point
temperatures rising through the 60s to around 70 by Monday.  The
warmer temperatures and higher humidity will also bring the area a
chance of thunderstorms late Sunday night and Monday.

Carney

&&

.AVIATION...  (For the 18z TAFs through 18z Tuesday Afternoon)
Issued at 1215 PM CDT Mon Jul 22 2019
IFR and MVFR ceilings will likely hang
over the eastern Ozarks for several more hours this
afternoon...likely lifting and clearing out by 20-21Z. Elsewhere
and otherwise, expect VFR flight conditions to prevail with
northerly flow as high pressure builds from the northern Plains
into the Midwest.

SPECIFICS FOR KSTL:
VFR flight conditions and northerly flow are expected to prevail
at Lambert through Tuesday afternoon. There is some cumulus
popping up in the vicinity of the terminal, but bases are expected
to be at or above 5,000 feet this afternoon. Cumulus should
dissipate quickly around sunset this evening.

Carney

&&

.PRELIMINARY POINT TEMPS/POPS...
Saint Louis     60  81  63  83 /   0   0   0   0
Quincy          57  80  59  82 /   0   0   0   0
Columbia        59  79  59  82 /   0   0   0   0
Jefferson City  61  80  60  83 /   0   0   0   0
Salem           56  79  59  82 /   0   0   0   0
Farmington      57  78  59  81 /   5   0   0   0

&&

.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.