Fast-moving storm to bring wind and rain to eastern Idaho Monday

IDAHO FALLS, Idaho (KIFI)- Eastern Idaho will experience dry weather and patchy fog tonight before a fast-moving storm system brings gusty winds and rain Monday night. Low temperatures will drop to around 33 degrees overnight as fog develops after midnight.

High pressure over the region is maintaining calm conditions tonight, but weather patterns will shift as the week begins. After morning fog clears Monday, temperatures will rise to near 60 degrees before rain and breezy winds arrive late Monday evening.

The incoming storm system moving in from the Pacific will bring increasing winds and widespread rain Monday night. Gusts across the Snake River Plain are anticipated to reach between 30 and 40 mph overnight, accompanied by a 80% chance of rain mostly before midnight.

Precipitation amounts will vary significantly across the region based on elevation. Lower elevations are forecast to receive less than 0.10 inches of rain, while mountain zones could receive between 0.20 and 0.30 inches of liquid precipitation. The Eastern Magic Valley carries an 85% likelihood of remaining entirely dry throughout the event.

As colder air moves into the area late Monday night, snow levels will drop to approximately 6,500 feet. Mountain passes and peaks are expected to see between one and three inches of snow accumulation. Warm surface temperatures on valley floors will prevent snow or stray rain-snow mixes from sticking.

High terrain along the Continental Divide and areas between Interstate 15 and the Wyoming border have more than a 65% chance of receiving more than 0.25 inches of liquid precipitation. Exact snow amounts in the mountains could vary depending on the depth of the storm system as it passes.

A broader weather pattern will keep lingering showers over higher terrain through midweek before the main system exits. Another storm system is forecast to deepen along the Pacific Northwest coast Thursday into Friday, bringing falling temperatures, lower elevation rain and mountain snow to close out the workweek. Weather forecasters noted that the exact timing and intensity of late-week precipitation will depend on the final path of the storm system.