Unsettled weather continues over the Great Basin and Desert Southwest as a slow moving cold front and lingering tropical moisture remain overhead. Much of the region is expected to experience downpours throughout Monday, October 12, 2026, with a focus over favorable terrain from Utah to Arizona.
Scattered flash flooding is possible as the current round of heavy rain overlaps with areas already impacted by heavy rainfall over the previous days. The approach of a closed upper-low from the Northwest will also lower snow levels enough to support snow in the peaks of the Shoshone and Monitor Range in Nevada and the Utah Wasatch. This upper-low is expected to maintain the wet pattern in the West through Tuesday, October 13, 2026, which could lead to isolated flash flooding in Utah.
A temperature dichotomy is forecast to remain across the country through mid-week. Well above average temperatures are expected to develop over much of the Central and Eastern U.S., with highs reaching into the 80s or even lower 90s for portions of the Plains and Midwest. Conversely, much colder temperatures are expected across the West under the upper-low, with highs generally in the 40s and 50s across the Intermountain West.
Further east, another slug of moisture will interact with a slow moving cold front and a sharpening dryline to move showers and thunderstorms toward the Central and Southern Plains. By Wednesday, October 14, 2026, rainfall amounts of 2-3 inches are possible from western Missouri to the Texas Big Bend, where a Slight Risk of excessive rainfall is highlighted. Additionally, a developing frontal wave will spread showers and thunderstorms across the Northern Tier from the Upper Midwest to New England tomorrow and Wednesday, though no excessive rainfall threat is anticipated for that activity.
