Area Forecast Discussion
Issued by NWS Dodge City, KS
FXUS63 KDDC 252311
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DODGE CITY KS
611 PM CDT Fri Jul 25 2014
...Updated Aviation Section...
.SHORT TERM...(This evening through Saturday)
ISSUED AT 109 PM CDT FRI JUL 25 2014
I will change very little to this current forecast, since the
ongoing forecast seems on track and in agreement with the short
term, high definition models. We have been heating up faster than
yesterday, and I see no reason why we won`t reach the 100 to 104
degree range today. Dew points in our eastern tier of counties
are in the upper 60s, which will combine with the 103F or so surface
temperatures to give heat indices in the 105F range. Thus, the NPW
Heat Advisory will continue through 8 PM CDT this evening. All of
the counties may not reach the 105F Heat Advisory criteria, but they
will come close. There is a lee side trough moving near the
Colorado border, and if any storms do form this evening, it should
be near the trough axis. Later, the trough could slide east into
our central CWA, and isolated storms could fire there towards
midnight. As for low temperatures, we should be just a little
cooler than this morning, and min temps are forecast to be in the
upper 60s near Syracuse, and range to the mid 70s in Coldwater and
Medicine Lodge. I expect winds will not be as brisk as they were
last night, either.
As for Saturday, we will be under the dome of a hot, upper high
pressure dome centered off to our southwest. A surface trough will
again form in Colorado during Saturday afternoon, and then move into
western Kansas during the evening. So, at this time, I do not
expect any thunderstorms during Saturday, but just after sundown.
Maximum temps Saturday will reach the 99 to 103F degree range, but
dew points will be slightly lower than today. Thus, a heat advisory
does not seem imminent Saturday. Winds will vary from south at 10
to 20 mph in the Medicine Lodge area to the east across our northern
2/3rd of the forecast area.
.LONG TERM...(Saturday night through Friday)
ISSUED AT 420 PM CDT FRI JUL 25 2014
Isolated convection be possible Saturday night along a zone of enhanced
low level frontogenesis. The global models (EC/GFS) are in fair agreement
with storms developing as is with the mesoscale models (WRF, less 4
km NAM). Broad brushed slight pops as no real one area is preferred
over another. An inverted-v thermo profile is expected, so storms could
produce microbursts. Shear is on the weak side, so winds and lightning
should be the main threats. Brief heavy rainfall is also a lower end
threat. Storms will be diurnally driven and activity should quickly
end by dusk. Overnight minimums expected to be in the 70s.
For Sunday, we will be behind the front in a post-frontal upslope
regime. Will have to watch out for orographic convection forming over
the Colorado terrain and propagating east Sunday night across the western
zones. Have the highest pops for far southwest Kansas as well as lower
maximums for Sunday. Highs in the 80s to low 90s.
Those who like cooler temperatures will be happy to know that there
is still the signal for cooler conditions next week. There is some similar
synoptic hints of this upcoming cooler spell as to the last cooler temperature
outbreak we saw earlier - however, the overall magnitude should be somewhat
tapered compared to the previous event.
The most interesting weather looks to be Monday and particularly Tuesday.
Northwesterly flow aloft and low level upslope flow all point to the
synoptic/mesoscale pattern that of which is conducive to MCS formation.
The best area for the most precipitation through next week will be across
far southwest Kansas - exactly where they need it - as they are experiencing
the most severe drought conditions.
I pretty much left the allblend temps alone, but there probably is a
good chance that these temps will be too warm. The EC suggests some areas
that remain under precip and clouds will not break out of the 60s. Something
to watch. Still for the end of July, there isn`t much room to complain
even if we are only in the 70s for highs midweek. Next Wednesday looks
to the coolest during my period. Way out by the end of the extended
pd, the EC and particularly the GFS indicate amplification and possible
slight retrogression of a downstream trof/low. The associated mid level
cold pool could result in more shower/iso storms for the end of next
week, but confidence is extremely low. Some modification of allblend
pops were done after WFO coordination.
.AVIATION...(For the 00Z TAFS through 00Z Saturday evening)
ISSUED AT 604 PM CDT FRI JUL 25 2014
VFR conditions will prevail through Saturday. Upper level high
pressure will persist from New Mexico into Oklahoma, while a deep
upper level trough moves from southern Saskatchewan into southeast
Manitoba by Saturday evening. At the surface, a weak trough from
north central Kansas into eastern Colorado will move little tonight.
Widely scattered evening thunderstorms are possible along the trough
axis. Other thunderstorms in eastern Colorado will propagate into
western Kansas after 9 PM but should gradually weaken to only
scattered showers by midnight. Scattered to broken clouds with bases
aoa 200 can be expected to spread across western Kansas this
evening. Local ceilings near 080 will occur as weakening
thunderstorms approach GCK after 03Z, and scattered clouds near 080
with ceilings aoa 200 can be expected as the weakening area of
showers moves east through 12z.
.PRELIMINARY POINT TEMPS/POPS...
DDC 72 101 71 90 / 20 10 20 10
GCK 69 100 70 89 / 20 20 20 20
EHA 70 101 70 89 / 30 10 20 30
LBL 72 103 72 91 / 20 10 20 30
HYS 72 100 71 90 / 20 10 20 10
P28 75 103 74 94 / 10 10 10 10
HEAT ADVISORY until 8 PM CDT this evening FOR KSZ031-046-065-066-