504
FXUS65 KRIW 061040
AFDRIW

Area Forecast Discussion
National Weather Service Riverton WY
440 AM MDT Mon Oct 6 2025

.KEY MESSAGES...

- Decreasing clouds today with still chilly temperatures.

- Clear skies overnight tonight will bring most areas near or
  below freezing, with more Warnings expected.

- Moderating conditions through the rest of the week, with
  temperatures back to near or above normal by Wednesday.

&&

.DISCUSSION...
Issued at 212 AM MDT Mon Oct 6 2025

The remaining trough axis continues to drift southward today,
but will still be producing some light precip across central WY
through around noon today. As the trough axis moves south, it
will allow northerly flow aloft to begin to carve out the low
clouds across the state. Most areas should be nearly clear by
late this afternoon. With the core of the coldest temps with
this system still in the vicinity, temperatures will struggle
to reach back into the 50s this afternoon. With clear skies
tonight, another round of freezing temperatures is expected
across all of western and central WY.

Behind this trough, a large ridge builds across the
Intermountain West, paired against a large cutoff low settling
just off the PacNW Coast. This should keep the weather more
tranquil for the latter half of the week, allowing temps to
recover back to near to just above normal in the 60s to near 70.

&&

.AVIATION /12Z TAFS THROUGH 12Z TUESDAY/...
Issued at 439 AM MDT Mon Oct 6 2025

MVFR to IFR conditions across most terminals to start the TAF
period. Low ceilings have developed across nearly all terminals west
of the Divide with OVC003-010. KBPI is the one exception to this as
it is on the outskirts of the cloud deck and will likely remain VFR.
Terminals east of the Divide have seen precipitation end with the
exception being KRIW and KLND were some isolated showers have
developed nearby this morning. These showers should dissipate
shortly after the start of the period. All terminals will likely
remain MVFR to IFR for the next 3 to 6 hours after the start of the
period. This is due to low ceilings persisting across the region
with occasional visibility drops as well. Conditions should
begin to improve by around 15Z with ceilings gradually raising
and breaking apart through the afternoon and evening. Most
terminals should begin to see SKC conditions by 00z Tuesday.
Winds remain light across all terminals through the TAF period.
Another round of fog/low ceilings may be possible for Tuesday
morning but confidence remains low at this time. KJAC and KPNA
have VCFG starting around 09Z Tuesday to indicate this
possibility. Mountain tops may be obscured for much of Monday
morning with decreasing obscuration throughout the afternoon.

Please see the Aviation Weather Center and/or CWSU ZDV and ZLC for
the latest information on smoke, icing, and turbulence
forecasts.

&&

.RIW WATCHES/WARNINGS/ADVISORIES...
Freeze Warning until 10 AM MDT this morning for WYZ003-016-019-
028>030.

Freeze Watch from late tonight through Tuesday morning for
WYZ003>006-010-011-017>020-028>030.

&&

$$

DISCUSSION...Straub
AVIATION...Dziewaltowski