Area Forecast Discussion
Issued by NWS Dodge City, KS

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490
FXUS63 KDDC 200818
AFDDDC

Area Forecast Discussion
National Weather Service Dodge City KS
318 AM CDT Fri Oct 20 2017

...UPDATE TO SHORT TERM...

.SHORT TERM...(Today and tonight)
Issued at 315 AM CDT Fri Oct 20 2017

Albeit a slight chance, thunderstorms will be possible later today
as an upper level shortwave, and associated H5 vort maxima, lift
northeast across the Texas Panhandle into central Kansas this
afternoon. A prevailing return flow will continue to slowly advect
moisture northward into the Central Plains, pushing surface
dewpoints to near 60F as far north as south central Kansas. Short
range model soundings show favorable shear later today while
instability increases upward of 1000 J/kg by mid to late afternoon.
However, lack of a triggering mechanism, a fairly weak flow aloft,
and a strong cap may very well hinder any storm development.
Still, an isolated storm or two cannot be completely ruled out
late this afternoon/early evening, so will keep a mention of
slight pops across south central Kansas.

Strong southerlies will reinforce a warmer air mass already in place
across the high plains today with H85 temperatures ranging from the
mid teens(C) in central Kansas to near 20C along the Colorado border
by this afternoon. Expect highs up into the lower to mid 80s(F)
across west central and portions of southwest Kansas to the mid to
upper 70s(F) in south central Kansas where increased cloud cover may
limit climbing temperatures. Temperatures will be well above normal
tonight with lows only down into the 50s(F) and 60s(F).

.LONG TERM...(Saturday through Thursday)
Issued at 223 AM CDT Fri Oct 20 2017

Thunderstorm chances bump up a little Saturday as a progressive
upper level trough pushes through the Intermountain West into the
Western High Plains early in the period. In response, surface low
pressure will develop and strengthen lee of the Rockies while a
sharpening dryline edges slowly eastward into southwest Kansas.
Meanwhile, moisture will continue to advect northward ahead of the
dryline with surface dewpoints reaching into the lower to mid
60s(F), particularly across south central Kansas. Taking into
account the timing and positioning of the fast approaching front,
thunderstorms are expected to develop along and ahead of the
boundary as it pushes into increased instability more readily
available in south central Kansas. Favorable shear profiles and
sufficient dynamics aloft in the form of a +70kt jet may be
enough to support strong to marginally severe thunderstorms before
they quickly move off to the east with the front. A quieter pattern
will return Sunday as much drier air filters into western Kansas
in wake of the aforementioned frontal passage and is reinforced
by yet another cold front moving through early next week.

More seasonable temperatures can be expected across western Kansas
Saturday as much cooler air filters southward across the high plains
in wake of a cold frontal passage. Highs are only expected to reach
up into the 60s(F) from west central Kansas to portions of southwest
Kansas. Highs should still climb into the 70s(F) ahead of the front
in south central Kansas before it moves through later in the
afternoon. A brief warming trend will ensue Sunday as surface high
pressure extends from the Colorado Rockies southeast into the South
Plains setting up a westerly downslope flow across western Kansas.
Expect highs to reach back up into the lower to mid 70s(F) Sunday
afternoon with slightly warmer highs Monday before another cold
front pushes through western Kansas.

&&

.AVIATION...(For the 06Z TAFS through 06Z Friday night)
Issued at 1209 AM CDT Fri Oct 20 2017

VFR conditions will prevail at all TAF sites through early Friday
evening. South winds 5 to 15kt will persist across western Kansas
overnight as a lee side trough of low pressure remains anchored
across southeast Colorado. South winds will then increase 25 to 35kt
through early Friday afternoon as the lee side trough strengthens
near and along the Colorado border. Wind gusts up to 40 to 45kt
will be possible mid to late afternoon.


&&

.PRELIMINARY POINT TEMPS/POPS...
DDC  80  61  69  39 /  10  10  10   0
GCK  82  55  65  34 /   0   0   0   0
EHA  82  54  65  37 /   0   0   0   0
LBL  83  59  68  36 /  10  10   0   0
HYS  80  62  67  38 /  10  10  20   0
P28  77  66  75  43 /  20  20  50  20

&&

.DDC WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

$$

SHORT TERM...JJohnson
LONG TERM...JJohnson
AVIATION...JJohnson



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