Area Forecast Discussion
Issued by NWS St. Louis, MO

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FXUS63 KLSX 260719
AFDLSX

Area Forecast Discussion
National Weather Service Saint Louis MO
219 AM CDT Mon Jun 26 2017

.SHORT TERM...  (Through Late Tonight)
Issued at 216 AM CDT Mon Jun 26 2017

Shortwave and associated cloud cover/showers developing ahead of it
evident on satellite/regional radar this morning across the northern
Plains and upper Midwest.  This feature will move south and bring
scattered showers and isolated thunderstorms to the CWA today. Think
greatest coverage will be this afternoon when diurnal heating aids
convective development. Have gone on warmer side of guidance for
temperatures given yesterdays highs and sunshine expected this
morning.

Any lingering convection should diminish quickly this evening with
loss of daytime heating and the shortwave exiting the region.
Temperatures will once again cool into the 50s areawide.

Sieveking

.LONG TERM...  (Tuesday through Sunday)
Issued at 216 AM CDT Mon Jun 26 2017

Upper level ridge to build in on Tuesday, so will see one more dry
and cooler day before going back to more summer like conditions for
the rest of the forecast period.

By Wednesday, upper level flow becomes zonal with active period
moving in. Will see several rounds of storms from Wednesday
afternoon through the rest of the forecast period. However, it will
not be continuous rain. First system on Wednesday will slowly drag a
frontal boundary south into forecast area. With upper flow being
zonal, boundary to stall out and will have the potential for locally
heavy rainfall for areas along and north of Interstate 70 through
Friday. The best chances will be from Thursday afternoon through
Friday.

By the weekend, upper level trof builds in allowing system to
finally push through region. Will still have chances of showers and
storms though.

As for temperatures, will see them moderate from mid week on with
highs back in the mid to upper 80s. Then dip back down a bit below
normal for the weekend.

Byrd
&&

.AVIATION...  (For the 06z TAFs through 06z Monday Night)
Issued at 1151 PM CDT Sun Jun 25 2017

VFR conditions are expected for the first 0-6 hours and perhaps
for the first 0-12 hours. There is greater uncertainty regarding
VFR conditions after 26/15z because an approaching disturbance
will generate widely scattered SHRA/TSRA across the area, although
the best opportunity for precipitation at the terminals will be
after 26/18z. Winds will become westerly after 09-12z.

Kanofsky
&&

.PRELIMINARY POINT TEMPS/POPS...
Saint Louis     83  57  81  65 /  40  20   0   0
Quincy          73  51  78  62 /  40  20   0   0
Columbia        78  54  79  64 /  40  20   0   0
Jefferson City  78  55  81  65 /  40  20   0   0
Salem           78  55  78  59 /  30  20   0   0
Farmington      82  55  80  60 /  40  20   0   0

&&

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

$$
WFO LSX



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