Area Forecast Discussion
Issued by NWS Rapid City, SD
Issued by NWS Rapid City, SD
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573 FXUS63 KUNR 212324 AFDUNR Area Forecast Discussion For Western SD and Northeastern WY National Weather Service Rapid City SD 524 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 00Z TAFS Through 00Z Sunday Evening) Issued At 522 PM MDT Sat Sep 21 2024 Gusty northwest winds will continue to diminish throughout the early evening. VFR conditions will prevail through the TAF period. && .UNR WATCHES/WARNINGS/ADVISORIES... SD...Frost Advisory from 1 AM to 8 AM MDT Sunday for SDZ001-002-012. WY...Frost Advisory from 1 AM to 8 AM MDT Sunday for WYZ054>056- 058>060. && $$ DISCUSSION/KEY MESSAGES...JC AVIATION...Dye