Area Forecast Discussion
Issued by NWS Springfield, MO

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FXUS63 KSGF 222253

553 PM CDT Tue Apr 22 2014

...Aviation Forecast Update...

.SHORT TERM...(This Evening through Wednesday)
Issued at 302 PM CDT TUE APR 22 2014

A picture-perfect Spring day is underway this afternoon across the
region, with abundant sunshine, light north winds and temperatures
in the mid to upper 60s.  This is all courtesy of high pressure that
is building behind a weak cold front that passed through the region
yesterday evening/night.  This high will continue to slide east
across the Missouri Valley this evening, and should be positioned to
give us a rather cool night across the region, especially the
eastern Ozarks, where morning lows will dip into the low 40s.

Southerly winds will begin to increase tomorrow as that area of high
pressure moves east of the region, with relatively breezy conditions
expected by tomorrow afternoon across the area.  Moisture will be
somewhat slow to return to the region, especially over central
Missouri, where elevated fire weather conditions will be possible
tomorrow afternoon.

Those southerly winds, combined with large scale subsidence as an
upper level ridge moves overhead, should give us a rather warm day
tomorrow over western Missouri, where temperatures will approach 80
degrees.  Somewhat cooler readings are expected to the east, with
low to mid 70s common across south central Missouri and the eastern

.LONG TERM...(Wednesday Night through Tuesday)
Issued at 302 PM CDT TUE APR 22 2014

By Thursday morning, a quick moving mid level trough is expected to
swing east across the Central Plains, with an accompanying cold front
sweeping across the region during the day Thursday.  This will set
the stage for showers and thunderstorms from late Wednesday
night/early Thursday morning through Thursday evening.  Right now,
precipitation and cloud cover ahead of the front, along with
lackluster moisture return, should limit instability considerably
for Thursday afternoon, though an isolated strong/severe storm isn`t
out of the question as the front moves through.  Marginally severe
hail and perhaps wind would be the primary threat.

That front should clear the area by late Thursday evening, with the
threat of precipitation ending as the front clears the area.  The
post-frontal airmass isn`t particularly cool, and temperatures on
Friday will remain in the mid 70s.

The cold front that passes through the region Thursday will only
make it to I-40 or so before stalling out Friday, and that boundary
will then return back to the north on Saturday as a warm front.
There remains a fairly large spread among guidance members as to
how quickly and how far north that front will move, but where it
does move through, a much warmer and more moist airmass will build
in.  A few showers or thunderstorms will be possible later Saturday
in association with the front.

Sunday is looking to be the most interesting day within the coming
week, as a deep western trough ejects east across the Great Plains, and
a dry line sets up along and just east of I-35 by Sunday morning.
While the details differ, the global model suite is in general
agreement in the large scale pattern, which is one that would favor
severe weather across a large portion of the nation`s mid section,
including the SGF forecast area.  While too early to talk specifics,
we would certainly encourage everyone to stay tuned over the coming
days as the threat area and specific hazards are refined.  The
severe threat may linger into Monday, before a much cooler pattern
take hold for next week.


.AVIATION...(For the 00Z TAFS through 00Z Wednesday Evening)
Issued at 550 PM CDT TUE APR 22 2014

VFR conditions will continue through tomorrow. Winds will become
light and variable this evening eventually becoming light
southeasterly by Wednesday morning. Winds will become gusty by
late morning through tomorrow afternoon for SGF and JLN.




LONG TERM...Boxell
AVIATION...Griffin is the U.S. government's official web portal to all federal, state and local government web resources and services.