Scientific Forecaster Discussion

Return to Local Conditions & Forecast

Without Abbreviations
With Abbreviations

fxus63 kunr 250508 
afdunr

Area forecast discussion for western South Dakota and northeastern Wyoming
National Weather Service Rapid City South Dakota
1008 PM MST Fri Feb 24 2017

Short term...(this evening through Saturday night)
issued at 149 PM MST Fri Feb 24 2017

Upper low has moved over western IA, and weak ridging
has developed over then northern rockies. Another upper low is
moving into the Pacific northwest. Mid to low stratus covers
northeastern WY, the Black Hills, and southwestern South Dakota. Some cumulus
are forming in an area of clearing over the Missouri River. Radar
shows some light snow showers gradually dissipating over
southwestern SD, and some forming over the Black Hills. With a
surface high over the northern plains, winds are light and variable.
Temperatures are in the 20s to low 30s.

Winds will turn southwesterly tonight ahead of the next surface
trough. Under mostly cloudy skies, lows will be in the single digits
and teens.

As the upper wave moves into the northern plains, light showers will
develop mainly over the Black Hills, northeastern WY, and
northwestern South Dakota on Saturday. Precipitation will be mostly in the
form of snow, but some rain may mix in as temperatures rise into the
30s. Showers will dissipate Saturday night.

Long term...(sunday through friday)
issued at 149 PM MST Fri Feb 24 2017

Mostly dry weather is expected Sunday into Monday, with
near to slightly below average temperatures in the 30s to low 40s.
Weak disturbances will bring clouds and the possibility for showers
at times. Best chances look to be Monday night into Tuesday, and
again Wednesday night. Drier and slightly warmer weather is expected
towards the end of next week, as an upper ridge builds over the
western Continental U.S..

&&

Aviation...(for the 06z tafs through 06z Saturday night)
issued at 1007 PM MST Fri Feb 24 2017

Mainly VFR conditions are expected tonight with some local MVFR
ceilings. MVFR/local IFR ceilings and snow showers will move into
northeastern Wyoming Saturday morning and into western South Dakota on Saturday
afternoon.

&&

Unr watches/warnings/advisories...
South Dakota...none.
Wyoming...none.
&&

$$

National Weather Service Glossary of Abbreviations