textproduct: Aberdeen

KEY MESSAGES

- Wind chills of -20 to near -40 degrees will continue into Monday morning, with the lowest readings across the Leola Hills of north central and Prairie Coteau of northeastern South Dakota.

- High temperatures briefly return to near normal values Monday, with highs in the upper teens and 20s. 30s are expected across Stanley, Jones, and Lyman Counties.

- Temperatures will return to below normal values Monday night through Friday, with highs around 10 to 20 degrees below normal.

DISCUSSION

Issued at 215 PM CST Sun Jan 25 2026

The current weather map shows a 1035mb surface high over northeastern SD and far southwestern ND. The surface high will reside over north central/central SD at 00Z Monday before quickly sinking across NE and into KS by late this evening.

The cold air and low wind chill readings will be the main concern over the next 24 hours. Wind chills of -20 to near -40 degrees will continue into Monday morning, with the lowest readings across the Leola Hills of north central and Prairie Coteau of northeastern South Dakota where the winds stay a little more elevated tonight with gusts of 15-25mph as the pressure gradient increases behind the exiting surface high. The dangerously cold wind chills could cause frostbite on exposed skin in as little as 10 minutes. A Cold Weather Advisory remains in effect tonight into mid-morning Monday, with McPherson County already in a Cold Weather Advisory due to the earlier onset of lower wind chills.

After lows in the -10 to -15 degree range, much warmer air briefly takes hold Monday afternoon behind a warm front extending south from a low across Hudson Bay/Canada. Temperatures will rise into the teens above to 20s above zero Monday. 30s are expected over south central South Dakota. Winds Monday, similar to today, have been increased from their original forecast. Winds out of the southwest at 12z Monday will shift out of the west by 18Z, and then out of the northwest through the rest of the afternoon with gusts of 30 to 40 mph. The strongest winds will be over the eastern slopes of the Prairie Coteau. These will be the strongest winds/gusts we experience through the work week.

The cold front will be sliding south across the forecast area Monday afternoon, with 850mb temperatures topping out between -2 and -8C at 18Z, falling -7 to -16C by 03Z Tuesday. Our brief return to seasonal normal temperatures will be just during the daytime hours Monday.

Cold Canadian high pressure will again build across the Northern Plains, and be overhead Tuesday afternoon into Tuesday night and stay over our far northeastern counties through at least Thursday evening as a weak lee trough tries to get better organized to our west.

Expect cold conditions, with highs around 10 to 20 degrees below normal for this time of year Tuesday through Friday. Mainly dry weather will continue through at least the first half of the work week, although it will be difficult to completely rule out flurries or a light dusting of snow over central SD.

AVIATION /18Z TAFS THROUGH 18Z MONDAY/

Issued at 1056 AM CST Sun Jan 25 2026

Terminals KABR,KATY,KPIR,KMBG

VFR conditions are expected to continue over the next 24 hours. The only exception will be early at ATY, which could experience MVFR ceilings or visibility under flurries of light snow showers for the first hour or so. Winds will increase out of the northwest, with gusts of 20-25kts at all locations through the daytime hours Monday.

ABR WATCHES/WARNINGS/ADVISORIES

SD...Cold Weather Advisory from 6 PM this evening to 9 AM CST Monday for SDZ006>008-010-011-017>023-036-037.

Cold Weather Advisory until 9 AM CST Monday for SDZ005.

MN...Cold Weather Advisory from 6 PM this evening to 9 AM CST Monday for MNZ039-046.