textproduct: Aberdeen

KEY MESSAGES

- A Slight Risk for severe weather along and south of Hwy 12. Areas to the north of Hwy 12 are under a Marginal Risk. Storms are expected to initialize during the late afternoon and continue through the evening. Large hail of 1-2" in diameter will be the main threat, with wind gusts of 60 mph as a secondary threat. Can't rule out a tornado over south central South Dakota or heavy rainfall leading to flooding.

- A brief weekend warmup will push high temperatures into the low to mid 90s across the forecast area on Saturday and Sunday, around 10 to 15 degrees above normal for early June.

UPDATE

Issued at 637 PM CDT Thu Jun 4 2026

Aviation discussion updated below for the 00Z TAFs.

DISCUSSION

Issued at 124 PM CDT Thu Jun 4 2026

Some spotty showers and storms have been moving through central SD this morning and will continue to move east into the early afternoon. While these have mainly been just showers and some occasional lightning, a stronger cell or two has had some dime sized hail from them at times.

A cold front is currently sitting over south central and northeastern SD, and will be slowly moving south through the afternoon and tonight. Some warm, moist air continues to move into the state as the afternoon heat helps to destabilize the atmosphere. Models are showing MLCAPE values of 1000-2000 J/kg over central and northeastern SD, with the highest instability over south central SD. The scattered morning showers and storms could help to stabilize the atmosphere over central SD into the afternoon, which could decrease the ability for storms to develop during the late afternoon. The storms that do develop will likely turn into discrete supercells from shear values of 35-45kts late this afternoon into the evening over central SD. These storms will be moving east through the evening over northeastern SD. Another cluster of storms is forecast to develop again over south central SD and move east over east central through the overnight hours. Large hail will be the primary threat with mid-level lapse rates of 7-8 C/km helping to get hail with the diameter of 1-2 inches to the surface. Additionally, with DCAPE around and above 800 J/kg, strong to damaging wind gusts from the storms will be possible. Models are showing a lack of low level shear over central and northeastern SD that would help tornadoes to develop. However, there is a little bit over south central SD, making it so that a tornado or two can not be ruled out. Storm motions for the storms are forecast to be around if not faster than 15kts, which will reduce the chances for slow moving storms. However, the flooding potential is still there with higher PWAT values, the chance for storms to move over the same areas, and if over areas that have recieved a lot of rain over the past couple of days.

There could be some lingering showers over south central and northeastern SD Friday morning after the storms move out overnight. There should be a break from severe storm Friday, though some isolated to scattered showers and storms could develop Friday afternoon over northeastern SD. The lack of shear over northeastern SD Friday will help to keep the storms from becoming long lived and supercellular in nature. The potential for storms to develop will decrease once the sun sets.

Friday night through Sunday, and upper-level ridge will start building and moving over SD. This ridge will help to keep precipitation out for a bit, giving us break from storms and rain for a day or two. Under this ridge, warmer temperatures will be moving in, which will be in the upper 80s to mid 90s. Sunday afternoon into Monday, a surface trough will be moving over SD. This surface trough will bring the next chance for storms and showers to occur Sunday evening into Monday.

AVIATION /00Z TAFS THROUGH 00Z SATURDAY/

Issued at 637 PM CDT Thu Jun 4 2026

Terminals KABR,KATY,KPIR,KMBG

TSRA/+TSRA possible again at most TAF sites this evening, with IFR VSBY possible in the strongest storms. Although at 00Z, it appears KATY has the highest threat to see storms through around 02Z or 03Z. Otherwise, trend is for quieter weather conditions on Friday with mostly VFR conditions expected. There may be pockets of lower MVFR CIGs across the region early Friday morning, but low confidence on overall areal coverage.

ABR WATCHES/WARNINGS/ADVISORIES

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