


Area Forecast Discussion
Issued by NWS Aberdeen, SD
Issued by NWS Aberdeen, SD
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834 FXUS63 KABR 300545 AAC AFDABR Area Forecast Discussion...UPDATED National Weather Service Aberdeen SD 1245 AM CDT Mon Jun 30 2025 .KEY MESSAGES... - Heat and humidity return by the end of the week with highs approaching 90F degrees once again and dewpoints back into the 60s. && .UPDATE... Issued at 1238 AM CDT Mon Jun 30 2025 Aviation discussion updated below for the 06Z TAFs. && .DISCUSSION... Issued at 249 PM CDT Sun Jun 29 2025 A shortwave trough is expected to move across south central SD this evening, setting off some showers and thunderstorms. While the official outlook for severe storms remains south of this forecast area, wouldn`t be surprised if one or two of the storms reached severe criteria. There`s still 1500 to 2000 J/kg CAPE, 7 to 8 C/km lapse rates and 35 to 40 kts of bulk shear along the UNR/ABR border. The bigger question will be storm placement. Some of the hi-res CAMs slide the storms southeast in western SD, missing our cwa completely. Late tonight an upper trough digs into the Dakotas with a weak backdoor cold front. Sfc high pressure will keep central SD dry Monday, but decent mid level moisture and unstable northwest flow in the east could lead to some afternoon popcorn showers. Added 20 to 30% pops east of the James Valley Monday afternoon to cover the potential. After 0z, the drier air mass intrudes from the west and should cut off any precip. Upper ridging builds back in on Tuesday. A 25 kt llj develops Tuesday night and could bring another round of showers and thunderstorms to the region. By Wednesday, some of the guidance members show a warm front pushing north through South Dakota. This will usher in even more heat and humidity for the end of the work week under the upper ridge. && .AVIATION /06Z TAFS THROUGH 06Z MONDAY/... Issued at 1238 AM CDT Mon Jun 30 2025 Terminals KABR,KATY,KPIR,KMBG VFR conditions are forecast through the TAF period. There`s an area of -SHRA/-TSRA departing the KATY vicinity right at the start of the TAF period, so no plans to include VC at this time. Otherwise, breezy northwest surface winds may gust to around 25 knots during the day Monday. && .ABR WATCHES/WARNINGS/ADVISORIES... SD...None. MN...None. && $$ UPDATE...TMT DISCUSSION...20 AVIATION...TMT