267
FXUS63 KUNR 220442
AFDUNR

Area Forecast Discussion For Western SD and Northeastern WY
National Weather Service Rapid City SD
1042 PM MDT Sat Sep 21 2024

.KEY MESSAGES...

-Much cooler this weekend, with some frost early Sunday morning
 across northeast WY and northwest SD

-Warming back up next week with little to no precipitation
 expected

&&

.DISCUSSION...(This Evening Through Saturday)
Issued at 1243 PM MDT Sat Sep 21 2024

Upper trough will continue to shift east across the northern
CONUS with sfc ridging ongoing locally. Winds will die off this
evening with clear skies, light winds, and dry air combining to
support the formation of frost across northeast WY and far
northwest SD early Sunday. Slightly warmer Sunday with highs in
the 70s most places under mostly sunny skies. Mean ridging can be
expected through next week, although a week upper trough will
shift through the region Monday, possibly supporting some high
based sprinkles or showers. Any precip will likely be confined to
the higher elevations given dry BL conds. Otherwise, expect a
gradual warming trend through the week, with temps back in the 80s
most places by the middle of the week, under dry conds.

&&

.AVIATION...(For the 06Z TAFS Through 06Z Sunday Night)
Issued At 1041 PM MDT Sat Sep 21 2024

VFR conditions will prevail through the TAF period.


&&

.UNR WATCHES/WARNINGS/ADVISORIES...
SD...Frost Advisory until 8 AM MDT Sunday for SDZ001-002-012.
WY...Frost Advisory until 8 AM MDT Sunday for WYZ054>056-058>060.
&&

$$

DISCUSSION/KEY MESSAGES...JC
AVIATION...Dye