327
FXUS65 KCYS 251128
AFDCYS

Area Forecast Discussion
National Weather Service Cheyenne WY
528 AM MDT Fri Jul 25 2025

.KEY MESSAGES...

- Today will be warmer, with a decrease in shower and
  thunderstorm coverage as a drier airmass moves in. Drier and
  hotter weather will prevail for Saturday through Monday,
  before an increase in shower and thunderstorm coverage and
  cooler temperatures develops for Tuesday through Thursday.

&&

.SHORT TERM /THROUGH SUNDAY/...
Issued at 112 AM MDT Fri Jul 25 2025

Today...The atmosphere dries out somewhat with precipitable water
values dropping to 0.5 to 1 inch. With warmer temperatures aloft and
less available moisture, only isolated to widely scattered afternoon
showers and thunderstorms are expected along the Colorado state line
from Laramie to Sidney. Will also see a corresponding rise in high
temperatures.

Tonight...Showers and thunderstorms will dissipate quickly in the
evening with the loss of daytime heating.

Saturday...The warming and drying trend continues under southwest
flow aloft. With a drier airmass, and 700 mb temperatures near 16
Celsius, the day looks likely dry, with maximum temperatures from
the upper 80s to near 100 degrees.

Saturday night...Looks like a quiet overnight, with temperatures
slightly warmer than the previous night at most locations.

Sunday...500 mb heights rise even more to 5940 meters, and with 700
mb temperatures near 18 Celsius, high temperatures will warm a few
more degrees at most locations. Continued dry with limited low and
mid level moisture.

&&

.LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/...
Issued at 112 AM MDT Fri Jul 25 2025

Monday...Ridging aloft remains entrenched across the region,
producing another hot day with highs in the 90s to near 100 degrees.

Tuesday...We may see another influx of monsoonal moisture, with
scattered showers and thunderstorms in the afternoon and evening.
With more cloud cover and precipitation coverage, maximum
temperatures will be a bit cooler, though still in the lower 80s to
lower 90s.

Wednesday-Thursday...Models indicate a wet pattern with the influx
of monsoonal moisture overhead, along with low level upslope
southeast winds. Thus, expect scattered to numerous afternoon and
evening showers and thunderstorms, which will also help to lower
maximum temperatures even more, into the lower 70s to lower 80s.

&&

.AVIATION /12Z TAFS THROUGH 12Z SATURDAY/...
Issued at 523 AM MDT Fri Jul 25 2025

West to southwest flow aloft will prevail, as a ridge aloft
builds across the region.

Wyoming TAFS...Scattered to broken clouds near 12000 feet will
prevail. Thunderstorms will be in the vicinity of Laramie and
Cheyenne from 21Z to 01Z. Winds will gust to 23 knots at all
terminals from 15Z to 18Z, to 01Z.

Nebraska TAFS...Scattered clouds from 10000 to 12000 feet will
prevail. Winds will gust to 25 knots at Chadron after 15Z, to
25 knots at Alliance from 15Z to 06Z, and to 23 knots at
Scottsbluff and Sidney from 15Z to 18Z, to 01Z.

&&

.CYS WATCHES/WARNINGS/ADVISORIES...
WY...None.
NE...None.

&&

$$

SHORT TERM...RUBIN
LONG TERM...RUBIN
AVIATION...RUBIN