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279
FXUS63 KUNR 260806
AFDUNR

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

.KEY MESSAGES...

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- Showers and Thunderstorms today

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

.DISCUSSION...
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(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.
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&&

.AVIATION...(For the 06Z TAFS Through 06Z Sunday Night)
Issued At 937 PM MDT Sat May 25 2024

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. Areas of IFR stratus/fog may develop on the SD
plains overnight, especially over southwest and south-central SD.

&&

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

$$

DISCUSSION/KEY MESSAGES...7
AVIATION...Johnson