Sidney, Nebraska 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

635
FXUS65 KCYS 181746
AFDCYS

Area Forecast Discussion
National Weather Service Cheyenne WY
1146 AM MDT Wed Jun 18 2025

.KEY MESSAGES...

- A warming and drying trend will take over Wednesday through
  Saturday. Near record high temperatures are possible on Friday
  and Saturday.

&&

.SHORT TERM /THROUGH THURSDAY NIGHT/...
Issued at 401 AM MDT Wed Jun 18 2025

Yesterday marked the end of an active pattern of daily storm
chances, while today marks the start of a warmer and drier trend
through the end of the week. Upper-level ridging will begin to build
into the Rockies today, ushering in warmer, as well as drier air
aloft. 700 mb temperatures will rise into the low teens this
afternoon, leading to high temperatures in the 70s and 80s. These
highs will be average for mid-June. Unfortunately these temperatures
will only be brief, with 700 mb temperatures climbing into the mid
to upper teens on Thursday. Temperatures on Thursday will warm
rapidly, leading to highs in the upper 80s to 90s. Precipitation
chances during this time are unlikely as subsidence under the ridge
should lead to mostly sunny skies. Hi-Res guidance backs this up,
showing no storm development across the CWA over the next 48 hours.

&&

.LONG TERM /FRIDAY THROUGH TUESDAY/...
Issued at 401 AM MDT Wed Jun 18 2025

Hot and dry weather continues into the end of the week with even
warmer temperatures expected on Friday and Saturday. With the upper-
level ridge over the center of the country, the CWA will be in
southwest flow, advecting dry, desert air into the area. 700 mb
temperatures will peak at +20C on Friday, putting these temperatures
in the 99th percentile and above for NAEFS climatology. Highs on
Friday will reach the low 100s in the Nebraska panhandle, 90s for
areas in Wyoming east of the Laramie Range, and upper 80s for areas
out west. These temperatures can once again be expected on Saturday
as 700 mb temperatures remain above the 90th percentile for NAEFS
climatology. Precipitation chances are not expected during this time
as the low and mid-level will be extremely dry. However, the CWA
will be in the vicinity of the 250 mb jet with a weak upper-level
disturbance. This will lead to a windy day on both Friday and
Saturday, especially out west where 700 mb winds will reach 40 to 50
kts. Dry and windy conditions will lead to widespread fire weather
concerns on both days.

A pattern change will come later in the day Sunday as a trough moves
into western CONUS. Cooler temperatures and precipitation chances
will once again be possible headed into the beginning of next week.
By Monday, temperatures will fall into the 60s and 70s as the trough
slowly moves through the Great Basin. The slow moving trough will
also bring chances for storms Sunday night, Monday afternoon and
Tuesday afternoon.

&&

.AVIATION /18Z TAFS THROUGH 18Z THURSDAY/...
Issued at 1140 AM MDT Wed Jun 18 2025

VFR through the period. A few gusts in the 20s are possible at
RWL. Wind shifts to southerly this evening, but remaining at or
below 10kts. Generally shift back to westerly/southwesterly by
Thursday morning, but again, remaining at or below 10kts.

&&

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

&&

$$

SHORT TERM...SF
LONG TERM...SF
AVIATION...PV