textproduct: Bismarck

KEY MESSAGES

- Dangerous heat this weekend through Monday, with daily maximum temperatures and heat index values in the upper 90s to near 110, and overnight lows in the upper 60s to upper 70s.

- Very little to no chances for showers and thunderstorms through Monday.

- Cooler north mid to late next week, but still hot across southern North Dakota. Daily low to medium shower and thunderstorm chances also return mid to late next week.

..DISCO

A 596 dam upper level ridge continues to build over the Rockies with a low level thermal ridge expanding in the Northern Plains. This ridge will continue to strengthen as it moves slowly eastward bringing forth increased heights and subsidence aloft. Setting the table for hot temperatures this weekend into next week. An upper level shortwave continues to ride the top of the upper level ridge bringing in a few showers and rumbles of thunder this morning to the north central. This wave will move out the region this afternoon bringing a temporary cooling due to scattered cloud cover. However, high temperatures are forecast to warm above 100 degree across the state with apparent temperatures around 103 today. Low temperatures are forecast to be in the 70s tonight.

The low level thermal ridge will pass over western and central North Dakota Sunday and Monday. This will lead to widespread high temperatures around 102 to 107 with apparent temperatures around 105 to 110 as high dewpoints will increase the real feel of temperatures. The upper level ridge will strengthen to a 599 dam and also be directly centered over the Northern Plains Sunday and Monday. After the start to early next week the upper level ridge will dampen and weaken a bit leading slightly cooler temperatures, but the ridge will remain in place. Thus, leading to above normal temperatures and dry conditions through this coming week. High temperatures Tuesday and Wednesday will trend slightly cooler but are still forecast hot around 100 degrees across southern half of the state. Precipitation chances remain low through this period with the northern half of the county warning area having low probs from thunderstorms and showers next week. This is due to multiple waves passing over the top of the upper level ridge clipping the north. There is a chance that the upper level ridge could strengthen next weekend leading to persistent hot temperatures.

AVIATION /18Z TAFS THROUGH 18Z SUNDAY/

Issued at 1220 PM CDT Sat Jul 11 2026

VFR conditions will continue across the state for the next 24 hours. There is a quick moving system that will brings scattered clouds and showers near KMOT in the next few hours. Winds will remain out of the south with breezy conditions in the afternoon.

BIS WATCHES/WARNINGS/ADVISORIES

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