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fxus63 klsx 250747 

Area forecast discussion
National Weather Service Saint Louis MO
247 am CDT sun Jun 25 2017

Short term... (through monday)
issued at 245 am CDT sun Jun 25 2017

An amplified upper air pattern featuring a broad longwave trough
covering the eastern two-thirds of the Continental U.S. Will guarantee
northwest flow aloft and cooler than normal temperatures through the
early part of the work week. Next chance of precipitation will
arrive late tonight and Monday with a signal of warm advection
showers and storms developing ahead of a potent shortwave rotating
south and east around the broader trough. Could also see some
diurnal convection associated with cold core nature of the
shortwave/trough Monday afternoon.


Long term... (tuesday through saturday)
issued at 245 am CDT sun Jun 25 2017

Atmosphere will become more zonal by mid-week across the Midwest
with temperatures moderating back to seasonal averages. An active
storm track of shortwaves will setup across the Midwest bringing
an increasing chance of showers and thunderstorms from Wednesday
night through Friday. Timing of main front and best chances of
widespread rain differ between available global model guidance
with the ecwmf suggesting late Thursday night and Friday morning
and the GFS washing the front out across the southern County Warning Area on
Friday. Rain chances for next weekend will largely depend on how
strong the front is and how far south it can travel. At this point
the GFS would suggest additional rainfall chances south of
Interstate 70 Saturday and Sunday, while the ecwmf keeps the area
dry until late Sunday afternoon.



Aviation... (for the 06z tafs through 06z Sunday night)
issued at 1143 PM CDT Sat Jun 24 2017

VFR flight conditions are expected to prevail across the area
through Sunday evening. Light southwest flow will turn to the
northwest by morning as another cold front will moves through the
area. Northwest wind will likely become gusty at times Sunday
afternoon before diminishing in the early evening.

Specifics for kstl:

VFR flight conditions will prevail at Lambert through Sunday
night. Light southwest flow will turn back to the northwest
Sunday morning as another cold front passes through the terminal.
Wind will likely become gusty again during the afternoon before
calming down again in the evening.



Preliminary point temps/pops...
Saint Louis 80 59 77 58 / 0 10 40 30
Quincy 75 53 74 52 / 0 0 30 20
Columbia 79 55 73 54 / 5 10 40 30
Jefferson City 81 55 76 55 / 5 20 40 30
Salem 79 55 76 54 / 0 0 20 30
Farmington 82 55 76 54 / 0 10 30 40


Lsx watches/warnings/advisories...

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