Scientific Forecaster Discussion

Return to Local Conditions & Forecast

Without Abbreviations
With Abbreviations

Area forecast discussion for western South Dakota and northeastern Wyoming 
National Weather Service Rapid City South Dakota
202 am MDT Monday Oct 20 2014

Short through Tuesday night
issued at 156 am MDT Monday Oct 20 2014

Upper level analysis has a wave digging into the Great
Lakes...with ridging across the western states. With high pressure
over the area...winds are light and skies are clear. Temperatures are in
and around the 40s.

Upper ridge will make for a dry and mild beginning to the week with
sunny skies. Return flow sets up across western South Dakota today. Slightly
breezy southerly winds will advect in warm air...resulting in above
average highs in the 70s. Lows tonight will be in the 40s. The
pressure gradient tightens on Tuesday...causing breezier winds and
more warm and moist air advection. Temperatures in the 70s to lower 80s are
expected for Tuesday. Breezy overnight winds will keep lows in the
middle 40s to middle 50s.


Long term...Wednesday through Sunday
issued at 156 am MDT Monday Oct 20 2014

Upper trough crosses the area Wednesday...with best lift/moisture
shifting east of the forecast area by middle day. Upper ridge
rebuilds across the area for the end of the week into the
weekend...resulting in dry weather and above average temperatures.


Aviation...for the 12z tafs through 12z Monday night
issued at 156 am MDT Monday Oct 20 2014

VFR conditions expected through tonight.


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


Short term...pojorlie
long term...7

National Weather Service Glossary of Abbreviations