textproduct: Aberdeen

KEY MESSAGES

- Patchy to areas of fog expected late tonight through early Wednesday morning. It could be dense at times, especially between the Missouri and James River with a probability of visibility of a quarter mile or less at 50 to 80%.

- Rain chances return to the region Wednesday, with the highest chances of 60-85% James Valley and eastward by afternoon. Weak thunderstorms are possible.

UPDATE

Issued at 1232 AM CDT Wed Oct 28 2026

The aviation discussion has been updated for the 06Z TAFS.

UPDATE Issued at 910 PM CDT Tue Oct 27 2026

Already seeing fog forming over portions of central and north central South Dakota. Satellite, webcams and surface observing stations confirm it. A few webcams/obs already showcasing visibility down below one mile, especially along the U.S. Highway 212 corridor. At this rate, it won't be long before a Dense Fog Advisory will be needed. Fog is already in the forecast. No updates needed tonight.

DISCUSSION

Issued at 1039 AM CDT Tue Oct 27 2026

The region remains socked in with low stratus this morning. Adjusted temperatures accordingly through tonight with stratus, drizzle, and fog in mind. Wednesday is a bit trickier, with some clearing ahead of the next low expected. However, morning fog and persistent, if higher, cloud cover in the east prompted a lean toward ConsShort/HRRR/ConsAll over NBM. Some of the fog may be dense on the edges of the stratus in central SD, but pinpointing exact extent of the lowest visibilities is too low confidence right now for any thought of a headline. Generally, though, vsby down to 1/2 to 2 miles will be widespread.

A weak low stretches northeast to southwest near the Coteau by Wednesday afternoon with some shortwave energy trailing over central SD. Both of these features will produce some rain showers. Can't rule out a rumble of thunder across the east along the front, either. Drier mid levels do move in behind this front, but high pressure at the sfc and the latent moisture from recent rain will likely lead to additional fog Wednesday night into Thursday morning before clearing.

Friday night into Saturday, a Plains low pushes some additional precipitation into the region. Another break is expected on Sunday before yet another low pressure system potentially affects the region Monday into Tuesday. Forecast temperatures are warm enough to support all rain over the next week.

AVIATION /06Z TAFS THROUGH 06Z THURSDAY/

Issued at 1232 AM CDT Wed Oct 28 2026

Terminals KABR,KATY,KPIR,KMBG

Fog and low stratus will continue to remain at a few of our TAF sites early this morning. IFR/LIFR cigs will remain prevalent at KABR/KATY through midday into this afternoon at KABR/KATY. LIFR to even VLIFR vsbys at these terminals will develop and persist through most of the morning hours. KMBG will see cigs fall to MVFR/IFR through the morning before improving closer to midday. KPIR looks to be the only terminal that will maintain VFR conditions through this TAF cycle. Light rain is anticipated to affect KABR/KATY/KMBG sites during by late morning through the afternoon.

ABR WATCHES/WARNINGS/ADVISORIES

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