Terrytown, Nebraska Weather Forecast Discussion

924
FXUS65 KCYS 171759
AFDCYS
Area Forecast Discussion
National Weather Service Cheyenne WY
1159 AM MDT Wed Sep 17 2025
.KEY MESSAGES...
- A slow moving storm system will keep unsettled weather over
  the area through Thursday morning, with chances for scattered
  showers and thunderstorms and cooler temperatures expected.
- Temperatures are expected to warm Thursday through the
  weekend with some minor chances for precipitation during this
  time.
&&
.SHORT TERM /THROUGH THURSDAY NIGHT/...
Issued at 335 AM MDT Wed Sep 17 2025
Radar currently shows slow moving light rain showers over portions
of the forecast area early this morning. A sluggish upper-level low
moving over the CWA is responsible for the precipitation overnight
as well as the showers and storms expected during the day today. As
the low gradually tracks eastward throughout the day, northerly
winds will push wrap around moisture into the CWA. This moisture,
combined with lift from the low will allow stratiform precipitation
to persist throughout the day. Coverage of precipitation will
increase as the day progresses and gradually taper off Thursday
night. Little instability is present, mainly due to cooler
temperatures associated with the northerly winds. Therefore, severe
weather is not expected. However, with what little instability there
is, a few embedded rumbles of thunder could be possible. As
previously mentioned, northerly winds have ushered in much cooler
air. High temperatures will be in the 50s and 60s, which is about 10
to 15 degrees below average. Precipitation and cloud cover will help
ensure these cooler temperatures. Higher elevation areas in the
mountains may also see a few snowflakes fly early this morning
and Thursday night.
&&
.LONG TERM /FRIDAY THROUGH TUESDAY/...
Issued at 335 AM MDT Wed Sep 17 2025
Towards the end of the work week, the stagnant upper-level low will
slowly spin over the north central part of the country. By Thursday,
this low will start pushing its way into South Dakota, leaving
precipitation from this system lingering over the CWA. Instability
across the area will continue to be weak, suggesting stratiform-like
precipitation with perhaps a few embedded rumbles of thunder. With
the upper-level low slowly beginning to move out, Thursday will also
mark the start of a warm up as warmer 700 mb temperatures are
ushered in. High temperatures on Thursday will be about 5 to 8
degrees warmer than Wednesday, with highs in the 60s and low 70s.
Temperatures will continue warming into the day Friday, with mostly
sunny skies helping facilitate highs in the 70s across most of the
CWA.
Heading into the weekend, warming continues with high temperatures
on both Saturday and Sunday making it into the 70s and 80s. A weak
shortwave will make its way across the northern tier of the country
over the weekend, potentially providing enough lift and a bit of
moisture for showers and thunderstorms to develop. Any storms that
do develop look to be mainly confined to the high terrain with
minimal impacts. Headed into the beginning of the work week, weak
ridging/zonal flow will lead to a mild and dry pattern. Mostly sunny
skies and above average temperatures can be expected for Monday and
Tuesday.
&&
.AVIATION /18Z TAFS THROUGH 18Z THURSDAY/...
Issued at 1155 AM MDT Wed Sep 17 2025
Precipitation will continue to move across the region through
tonight, bringing a mixture of all flight categories across all
terminals. Any rain/thunder that move across will primarily
bring these reduced VIS or lowered CIGs, with breezy and erratic
winds possible though not expected on the strong side. Winds
will be overall breezy from a northerly component, with gusts
around 20-30 knots expected. Tonight expect lingering clouds
with occasional showers, with NE Panhandle sites potentially
seeing a return of mist and fog bringing IFR to LIFR conditions
through tomorrow morning. By tomorrow afternoon, precipitation
and clouds should be exiting the region.
&&
.CYS WATCHES/WARNINGS/ADVISORIES...
WY...None.
NE...None.
&&
$$
SHORT TERM...SF
LONG TERM...SF
AVIATION...CG

NWS CYS Office Area Forecast Discussion