635
FXUS63 KUNR 261028
AFDUNR

Area Forecast Discussion For Western SD and Northeastern WY
National Weather Service Rapid City SD
428 AM MDT Sun May 26 2024

.KEY MESSAGES...

- Showers and Thunderstorms today

- Warmer and drier for the first half of the week with
  thunderstorms returning for the second half of the week.

&&

.DISCUSSION...(Today Through Saturday)
Issued at 151 AM MDT Sun May 26 2024

Current surface map places weak trough across the Northern
Plains. A few showers located across southeastern Montana into
northwestern South Dakota associated with weak impulse moving
through eastern Montana/northern Wyoming. A stronger shortwave
is located along the Idaho/Montana border. Showers linger across
northwestern South Dakota early this morning with initial wave.
Second shortwave moves through Wyoming into western South
Dakota/Nebraska late this afternoon with shower/thunderstorm
coverage increasing. Severe thunderstorms are not expected due to
weak buoyancy.

Upper level ridge builds across the Northern Plains Monday/Tuesday
with warmer/drier conditions. High reach the mid 70s/lower 80s on
Tuesday/Wednesday Upper trough moves into the northern Rockies
Wednesday and into the Plains for the end of the week. This will
bring a daily chance of showers and thunderstorms along with
slightly cooler temperatures.

&&

.AVIATION...(For the 12Z TAFS Through 12Z Monday Morning)
Issued At 422 AM MDT Sun May 26 2024

Patchy MVFR/IFR conditions associated with low stratus/fog have
moved into central through southwestern SD. Fog/stratus should
lift by 17-18z.

Isolated to scattered showers and thunderstorms are expected
through the period. Mainly VFR conditions will occur, although LCL
MVFR conditions are possible with the stronger showers/storms.

&&

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

$$

DISCUSSION/KEY MESSAGES...7
AVIATION...Wong