Area Forecast Discussion
Issued by NWS Dodge City, KS

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000
FXUS63 KDDC 232015
AFDDDC

Area Forecast Discussion
National Weather Service Dodge City KS
315 PM CDT Sat Mar 23 2024

.KEY MESSAGES...

- Strong weather system on Sunday will bring high wind, fire
  weather, and severe storms to our area.

- Snowfall is expected on the back side of the weather system on
  Monday, with minor accumulations.

- Dry, warming trend Tuesday through the end of the forecast
  period.

&&

.SHORT TERM /THROUGH SUNDAY/...
Issued at 315 PM CDT Sat Mar 23 2024

Water vapor satellite imagery and RAP upper air analysis reveal
roughly zonal flow is in place above the central plains, with a
strong trough beginning to move over the far western CONUS.
Ahead of this feature, surface analysis indicates lee
cyclogenesis is well underway with a ~1000-mb low centered over
central WY, extending southward into eastern CO. Mass response
around this cyclone is resulting in strong southerly winds
across our area, especially the western zones closer to the
surface low. As the morning cloud cover continues to erode,
boundary layer mixing will support further strengthening of the
winds through the afternoon, becoming sustained in the 25-35 mph
range with gusts to 45 mph. Afternoon highs today will range
from the mid/upper 60s west to the mid/upper 50s east.
Overnight, southerly winds will remain elevated as the surface
low is mainained by the rapidly eastward shifting upper trough.
This along with increasing cloud cover will inhibit radiational
cooling, and Sunday morning lows will only reach the mid/upper
40s.

Daytime Sunday, the strong upper level trough will continue its
progression eastward, with a lead shortwave impulse ejecting
into the central plains by 00Z Monday. As this occurs, the
surface low over eastern CO will deepen to around 980-mb,
strengthening the winds over southwest KS into the 30-40 mph
range with gusts of 50-55 mph. There is a chance we reach High
Wind Warning criteria (sustained winds of 40+ mph and/or gusts
of 58+ mph), but HREF probability of achieving warning criteria
is 10-20% at best, so there are no plans to upgrade the current
High Wind Watch just yet.

Next weather element to discuss is fire weather potential.
Latest guidance suggests a dryline will extend southward from
the surface low, initially draped along/near the KS/CO border.
As this feature mixes east during the day Sunday to near US-283
by 00Z Monday, rapidly decreasing dewpoints west of the dryline
will support minimum relative humidity dropping in the 15-20%
range. This along with the aforementioned strong winds will
foster near critical to critical fire weather conditions, and
therefore at least some of the current Fire Weather Watch will
be upgraded to a Red Flag Warning later today.

Finally, focus shifts to the potential for severe convection
Sunday afternoon. Modest moisture advection will be ongoing
Sunday morning thanks to the strong southerly winds, although
the recent cold frontal passage has diminished available
moisture from the source region (the Gulf of Mexico where
dewpoints are currently only in the mid-50s), which will act to
limit how high dewpoints will reach ahead of the sharpening
dryline. That said, very cold mid-level temperatures and steep
lapse rates will help overcome the meager moisture and support
MLCAPE in the 750-1250 J/Kg range. Kinematically, the ejecting
upper level shortwave trough will easily provide 35-45 kts of
deep-layer shear, which is more than sufficient for organized
updrafts. Current thinking is thunderstorms will initiate along
the dryline near the US-83 corridor during the 20-21Z time
frame, increasing in coverage/intensity and reaching severe
limits with time as they quickly move northeast. Primary
hazards are hail up to 2" in diameter and wind gusts up to 70
mph. A brief, isolated tornado cannot be ruled out, but poor
moisture will be a significant limiting factor.


&&

.LONG TERM /SUNDAY NIGHT THROUGH FRIDAY/...
Issued at 315 PM CDT Sat Mar 23 2024

Thunderstorms, some potentially severe, may be ongoing across
the eastern zones at the beginning of the long term period, but
these will move northeast into central KS by 02-03Z Monday.
Focus then shifts to the wrap-around precipitation as the
strong upper level trough pushes the surface low northeast.
Latest guidance suggests precipitation will begin to impinge on
our northwest zones shortly after midnight Monday morning as a
cold front pushes southward through the central plains. Cold
advection via strong northerly winds in the wake of the front
will facilitate a switch to snow as this precipitation swings
across southwest KS daytime Monday. Thankfully, the moisture
problems that affected the severe event will also limit total
snowfall, and 13Z NBM probability of exceeding 1" of snow is
only in the 40-70% range for roughly the western half of our
area. However, strong north to northwesterly winds in the 25-35
mph range with gusts of 45-50 mph combined with the light snow
will bring impacts, and winter weather headlines are being
considered. Monday evening into the overnight period,
precipitation will diminish from west to east and northwest
winds will weaken as the surface low pulls away, and a chilly
morning will be on tap Tuesday with lows in the low teens
northwest to low 20s southeast.

Daytime Tuesday through the end of the long term period, medium
range ensembles agree the deep upper level longwave trough will
move slowly eastward, and weak upper level ridging will build
in its wake over the western and central CONUS. This synoptic
pattern change will foster a dry, warming trend with afternoon
highs increasing from the 40s/low 50s Tuesday to the low/mid 70s
by Thursday/Friday.

&&

.AVIATION /18Z TAFS THROUGH 18Z SUNDAY/...
Issued at 1240 PM CDT Sat Mar 23 2024

Recent visible satellite imagery indicates this morning`s
MVFR/IFR cloud cover is deteriorating, allowing all terminals to
return to VFR except for HYS, which should follow here shortly.
This however is permitting boundary layer mixing to strengthen,
and transport strong southerly winds to the surface where they
will stay through the TAF cycle. Winds will be in 15-25 kt
range gusting to 35 kts this afternoon through the overnight
period, before increasing further into the 25-30 kt range with
gusts of 40 kts Sunday morning. These winds will also result in
strong moisture advection, which will bring overcast skies and
MVFR cigs to all terminals after 10-12Z Sunday.

&&

.DDC WATCHES/WARNINGS/ADVISORIES...
High Wind Watch from Sunday morning through Sunday evening for
KSZ030-031-044>046-064>066-078>081-088>090.
Fire Weather Watch from Sunday afternoon through Sunday
evening for KSZ043-061>063-074>077-084>087.

&&

$$

SHORT TERM...Springer
LONG TERM...Springer
AVIATION...Springer


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