National Weather Service United States Department of Commerce

Flooding Risks from Tropical Moisture Across the Southeast and Southwest

Tropical moisture from Isaias and Rachel will impact portions of the Southeast and Southwest this weekend. Flash flooding, strong winds and even a threat for severe thunderstorms and tornadoes are possible. Meanwhile, strong winds and dry fuels are raising fire weather concerns across the central Great Basin and western High Plains. Across the northern Rockies, first winter storm of the season. Read More >

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Last Map Update: Sun, Oct 11, 2026 at 3:58:14 am MDT

Mountain snow returns to the Northern Rockies beginning late Saturday and continuing through Monday morning. The heaviest accumulations are expected near the Continental Divide in southwest Montana, with snow levels as low as 3,000 feet. Drivers traversing mountain passes and backcountry roads should prepare for quick transition from slushy to snow-covered, with the most hazardous travel expected during the overnight and early morning hours. Anyone recreating in the backcountry must prepare for cold, wet, and windy conditions. Exposure to these elements will significantly increase the risk of hypothermia over the weekend.
Strong easterly wind gusts of 25 to 35 mph, with localized gusts exceeding 40 mph, will impact Western Montana and North-Central Idaho through Sunday, October 11th. The most intense gusts will be focused across higher elevations, along the east shore of Flathead Lake, and through east-west oriented canyons. These winds are expected to cause choppy lake conditions that will be difficult for small craft. Motorists should be prepared for sudden crosswinds on north-south roadways, particularly near canyon mouths. Tree damage and isolated power outages are also possible. Please secure loose outdoor items and monitor the latest forecast updates.
A hard freeze is forecast across western Montana for Monday and Tuesday mornings, marking the end of the growing season for sensitive plants. Frost is also expected for the lower elevations of north-central Idaho. Forecast low temperatures for Monday morning will plummet into the teens and 20s for western Montana, with 30s across north-central Idaho. Similar temperatures are expected on Tuesday morning. Actionable Steps: Take time this weekend to cover or harvest any remaining sensitive vegetables or flowers. Bring potted plants indoors or move them to a sheltered location, and take steps to winterize your home, property, and vehicles.

 

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