828 
FXUS63 KLSX 301658
AFDLSX

Area Forecast Discussion...Updated Aviation
National Weather Service Saint Louis MO
1158 AM CDT Sun Jul 30 2017

.UPDATE...
Issued at 904 AM CDT Sun Jul 30 2017

High pressure in the Mid Missisissippi valley will stay in control
over the area through Monday afternoon. Northwest flow aloft will
continue over the region with a trough over the northeast US and 
a ridge covering most of the western part of the country. Winds 
will be generally light out of northeast to east through the 
forecast period. Temperatures today will continue below seasonal 
normals to begin the new work week. 



Kelly

&&

.SHORT TERM...  (Through Late Tonight)
Issued at 340 AM CDT Sun Jul 30 2017

Little change in the short term forecast. Northwest flow aloft 
continues with a trof over the eastern US and a large ridge of high 
pressure over the weatern US. Surface high pressure from northern IL 
to the Great Lakes will keep a northeast to east wind flow across 
the are today and Monday. Temperatures wil slowly increase into mid 
week. 

JPK

.LONG TERM...  (Monday through Saturday)
Issued at 340 AM CDT Sun Jul 30 2017

Even though upper ridge is beginning to break down by Monday, 
surface ridge to remain in control with dry and cooler weather. Then 
by Tuesday afternoon, weak upper level shortwave to undercut the 
surface ridge, so could see some isolated showers and storms, mainly 
along and north of I-70. With loss of daytime heating, activity to 
diminish by sunset on Tuesday.

By Wednesday, surface ridge to move off to the southeast allowing 
next system to approach region. Will see increasing low level 
moisture and instability with showers and storms developing. 
However, coverage to remain isolated and scattered through Wednesday 
night as system stalls overhead.

Better chances of showers and storms beginning Thursday as stronger 
upper level shortwave moves in. Shortwave will eventually help to 
push boundary south of forecast area by Friday night with storms 
coming to an end.

As for temperatures through the period, will see near normal temps 
through Thursday, then drier and cooler air to move in once again 
for the beginning of next weekend.

Byrd

&&

.AVIATION...  (For the 18z TAFs through 18z Monday Afternoon)
Issued at 1055 AM CDT Sun Jul 30 2017

High pressure over the Mid Mississippi Valley only providing for 
scattered clouds and light northeast to easterly flow over the 
region. VRF conditions will persist through Monday afternoon over 
the area terminals. 


SPECIFICS FOR KSTL:VFR conditions and lights winds expected 
through Monday afternoon at the terninal. 


Kelly

&&

.PRELIMINARY POINT TEMPS/POPS...
Saint Louis     85  70  87  70 /   0   0   5   0 
Quincy          82  62  83  65 /   0   0   5   5 
Columbia        81  62  83  65 /   0   0   0   5 
Jefferson City  82  63  85  66 /   0   0   0   5 
Salem           83  63  86  65 /   0   0   5   0 
Farmington      83  59  86  64 /   0   0   0   0 

&&

.LSX WATCHES/WARNINGS/ADVISORIES...
MO...None.
IL...None.
&&

$$

WFO LSX