081
FXUS63 KUNR 292002
AFDUNR

Area Forecast Discussion For Western SD and Northeastern WY
National Weather Service Rapid City SD
202 PM MDT Tue Sep 29 2026

.KEY MESSAGES...

- Near or slightly above normal through the forecast period.

- Mostly dry conditions expected the remainder of the week.


&&

.DISCUSSION...(This Evening Through Tuesday)
Issued at 133 PM MDT Tue Sep 29 2026

Current Water Vapor and upper air models show shortwave just east
of the forecast area and an upper low over the four corners
region, with northwest flow over us. 19Z surface analysis shows
frontal boundary associated with the wave over far eastern SD this
afternoon. Mostly clear skies sit over the area, with
temperatures in the 70s and light winds out of the west to
northwest. Some patchy areas of fog and low ceilings is possible
overnight into Wednesday morning, generally for eastern SD,
however could impact south-central SD. Little change to the
overall pattern is expected through the week, with northwest flow
aloft hanging around. Mostly dry conditions are expected as well.
A cold front is expected Thursday, dropping temperatures from the
mid-70s down into the 60s, and bringing a small chance for some
light precipitation into the area. A couple weak impulses move
through the northern plains over the weekend and early next week,
however models currently show little to no moisture associated
with these waves.

&&

.AVIATION...(For the 18Z TAFS Through 18Z Wednesday)
Issued At 1114 AM MDT Tue Sep 29 2026

VFR conditions and generally light winds are forecast through the
TAF period.

&&

.UNR WATCHES/WARNINGS/ADVISORIES...
SD...None.
WY...None.
&&

$$

DISCUSSION...Dye
AVIATION...SE