textproduct: Aberdeen

KEY MESSAGES

- Mainly dry conditions will continue through next week with temperatures around average for this time of year. However, there is a 30-60% chance for showers and thunderstorms during the day Sunday over central SD, and increasing to 50-70% Sunday night across much of central and northeastern SD.

UPDATE

Issued at 1143 AM CDT Fri Aug 21 2026

No significant changes have been needed from the ongoing forecast. We've been starting to see some fair weather cumulus clouds develop over the far northeastern corner of SD into west central MN late this morning and will be watching for potential shower development over that area through this afternoon. The chance of precipitation remains low at this time, around 15% or less.

DISCUSSION

Issued at 103 AM CDT Fri Aug 21 2026

As of 1 AM CDT, temperatures across the region are in the 60s with winds out of the north to northwest at generally less than 10 mph. Expecting relatively quiet weather today with highs in the 80s and some very light showers across northeastern SD this afternoon. We remain on the downwind side of an upper level ridge today with a potential shortwave moving across the area Saturday which may produce some showers but CAMs aren't super excited about it.

Our next chance for some storms will be Sunday as a low develops off the Rockies. This has the potential to produce some thunderstorms throughout the day starting in central SD and spreading east during the late afternoon into the evening. In this area, models are showing 1000-1200 J/kg MLCAPE with lapse rates around 7 C/km during the afternoon hours. PWATs are in the 99th NAEFS percentile at 1.25 to 1.5 inches which will help storms and could lead to some heavier rainfall from storms. SPC may add in a marginal risk for severe storms. This low looks to move east Monday, spreading the potential for storms into eastern SD and west central MN. Afternoon precipitation chances return almost daily through the middle of next work week. Temperatures through the period will be right around normal with highs in the 80s. The HRRR smoke model is bringing some elevated smoke to the region today with some higher concentrations over northeast SD. This does look to remain elevated and result in some hazy skies.

AVIATION /18Z TAFS THROUGH 18Z SATURDAY/

Issued at 1143 AM CDT Fri Aug 21 2026

Terminals KABR,KATY,KPIR,KMBG

VFR conditions are expected over the next 24 hours.

ABR WATCHES/WARNINGS/ADVISORIES

SD...None. MN...None.