A storm packing considerable moisture will pass over Montana between now and Tuesday morning. Several flooding alerts have been issued as well as a weather advisory for snow where the heaviest precipitation is expected.
First to the flood alerts:
A FLOOD WARNING continues for the Helena valley and for the Little Bitterroot River in Sanders and Lake counties. Stream gauges show the Little Bitterroot is still rising.
A FLOOD ADVISORY continues through Monday for Jefferson, Broadwater, Meagher, Park, Mineral, Lake, Sanders, Gallatin, Flathead and Madison counties. Small streams will continue to rise out of their banks due to warm temperatures and expected rainfall from 0.25 inches to just over an inch.
A FLOOD WATCH for Ravalli County continues through Monday. This is also due to the heavy rain expected in the Bitterroot Valley starting Sunday night.
Southwest Montana and the Bitterroot Valley will see the most moisture over the next 36 hours. Here are the corresponding weather alerts:
WINTER WEATHER ADVISORY through 3 am Tuesday for the following counties: Lemhi, Beaverhead, Madison, Silver Bow, Deer Lodge, Powell, Granite, Gallatin, Jefferson, Park, Broadwater, Meagher. Snow amounts of 2 to 5 inches are possible beginning late Monday afternoon for high elevation valleys.
WINTER STORM WARNING for all passes in Southwest Montana until 3 am Tuesday. Heavy snow of 1 to 2 feet is possible. The West Yellowstone area is also in this warning and can expect 4 to 8 inches of snow.