Jacinto, Nebraska Weather Forecast Discussion

273
FXUS65 KCYS 302106
AFDCYS
Area Forecast Discussion
National Weather Service Cheyenne WY
306 PM MDT Tue Sep 30 2025
.KEY MESSAGES...
- Mild to warm temperatures will continue through Friday.
- A potent weather disturbance aloft and its associated cold
  front will bring cooler and wetter weather for Saturday
  through Monday. Some mountain snowfall is expected.
&&
.SHORT TERM /THROUGH WEDNESDAY NIGHT/...
Issued at 134 PM MDT Tue Sep 30 2025
An upper-level trough and associated energy will slide across the CWA
today bringing with it an influx of clouds and increased chances of
showers along with the threat of isolated afternoon thunderstorms.
All this is evident on the current visible satellite imagery, with
clouds pushing into the CWA from the southwest along with some
returns on radar indicating potential shower activity. Model data
suggests, based off of GFS Omega fields, there are some pockets of
upward motion in the atmosphere primarily across southern portions
of the CWA. This will bring the greatest threat of precipitation and
potential thunderstorms from a line from Rawlins to Alliance and
points south, including Cheyenne. Winds are ramping up across the
CWA, with gusts already approaching 25 to 30 mph for such places as
Laramie and Alliance. Temperatures will continue to warm into
Wednesday as 700MB temps climb into the 7 - 9 degrees Celsius range,
with the warmer temps across eastern Wyoming and the Nebraska
Panhandle. This translates to the upper 60s to lowers 70s west of I-
25 and upper 70s to lower 80s east of the I-25 corridor. Zonal flow
aloft will result in a drier Wednesday, however expect breezy winds
once again, similar to today.
&&
.LONG TERM /THURSDAY THROUGH MONDAY NIGHT/...
Issued at 305 PM MDT Tue Sep 30 2025
Long range models in good agreement late this week and early
next weekend regarding the Pacific storm system forecast to move
into the Rocky Mountain region late Friday and Saturday.
Although models agree on the long wave pattern past Saturday,
significant model and ensemble disagreement persists with the
secondary system and associated (stronger) cold front Sunday
and Monday.
For Thursday and Friday, warm temperatures will continue across
the area as the mid to upper level flow backs into the southwest
ahead of the Pacific system. With 700mb temperatures climbing
above 10c and near 12c/13c, expect highs well into the 80s east
of the I-25 corridor each day. Further west, 70s are expected
with highs around 80 possible...especially on Friday. Lowered
some areas on south facing ridges below guidance due to gusty
southerly winds in the afternoon. Otherwise, a pleasant start to
October is expected. Precipitation is unlikely both days due to
the dry southwest winds and dewpoints lowering into the 20s and
30s.
Surface cold front and upper level trough axis are forecast to
push into the area early Saturday morning and continue eastward
into the eastern high plains through Saturday afternoon. Most
models show the system taking its time moving across southern
and eastern Wyoming, so increase high temperatures out ahead of
it into the mid 70s...mainly far eastern Wyoming and western
Nebraska. Increased POP ahead and behind the front Saturday
afternoon and evening with a good chance for scattered to
numerous showers and isolated thunderstorms. Kept a minimal
coverage of thunderstorms, however, due to unfavorable
convective parameters (CAPE 

NWS CYS Office Area Forecast Discussion