textproduct: Bismarck

KEY MESSAGES

- Hot to very hot temperatures continue through at least mid- week in the southwest and south central.

- A little cooler far northwest today, then across the north Tuesday through the end of the work week.

- Dry today through Tuesday daytime, then low to medium (20 to 40%) chances for thunderstorms Tuesday night through Wednesday in the north. - Near daily low (20%) chances for thunderstorms through the weekend.

UPDATE

Issued at 659 PM CDT Mon Jul 13 2026

The hot weather continues, but temperatures are starting to drop off, as we are now 98 in Bismarck after topping out at 105. A frontal boundary continues to drop south through central North Dakota, with winds shifting northerly and becoming a bit gusty in its wake. Boundary will continue its slow southward sag before stalling out late tonight/early Tuesday morning.

DISCUSSION

Issued at 249 PM CDT Mon Jul 13 2026

An upper level ridge continues to dominate the upper level pattern across western and central CONUS. This ridge has brought widespread hot temperatures into the Northern Plains. The low level thermal ridge is centered across eastern Montana and western North Dakota. This will cause temperatures to warm across southwestern and south central North Dakota to around 100 to 106 degrees this afternoon. The rest of the state is forecast to be in the 90s to around 100. The central and eastern half of the state has dew points in the 60s to lower 70s leading to heat index values of 105 to 110. There is also another chance of breaking record high temperatures for Bismarck, Dickinson, and Minot today. There is a back door cold front entering the region mainly in the northwest keeping temperatures in the lower 90s. Tonight low temperatures are forecast to drop down around 70s potentially being record high low temperatures.

The aforementioned cold front will bring cooler temperatures across the northern half of the state through the week so heat headlines will expire north tonight. While the southern half will remain hot, thus heat headlines were extended through Wednesday evening and likely will be need across the south Thursday.

The upper level ridge will dampen this week across the Canadian Prairies. This will lead to multiple waves traversing across southern Saskatchewan and Manitoba. There are low chances of showers and thunderstorms by the middle of the week along the International Border. Then low chance this weekend as the upper level ridge could regress a bit westward placing the Northern Plains in the northwesterly flow aloft. With all of that said, the upper level ridge will persist across the Plains through the weekend. 100 degree temperatures are forecast across the southern half of the state through the middle of the week. After that, above normal in the upper 80s to upper 90s are forecast to persist into the weekend across the state. There is a trended of slightly cooler weather to kick off next week.

AVIATION /00Z TAFS THROUGH 00Z WEDNESDAY/

Issued at 659 PM CDT Mon Jul 13 2026

VFR conditions will continue through the forecast period.

BIS WATCHES/WARNINGS/ADVISORIES

Extreme Heat Warning until 1 AM CDT /midnight MDT/ Tuesday for NDZ001>005-009-010-012-013-017-022-023-025-055>058. Extreme Heat Warning until 10 PM CDT /9 PM MDT/ Tuesday for NDZ018>020-031>033-035>037-040>044-046>048-050-051-059>062.