Flood Watch

* WHAT...Flash flooding caused by excessive rainfall is possible.

* WHERE...A portion of northwest Montana, including the following counties, Flathead and Lake.

* WHEN...From 3 PM MDT this afternoon through late tonight.

* IMPACTS...Excessive runoff may result in flooding of creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. High country mudslides are possible, especially near steep terrain which could endanger hikers. The upper portions of the Going-To-The-Sun Road is vulnerable to rockfall or debris flow.

* ADDITIONAL DETAILS... - Anomalous subtropical moisture combined with a slow-moving weather front will trigger moderate to heavy rainfall rates over the region by late Sunday afternoon into the evening hours. High resolution weather models depict rain-rates exceeding 0.30 to 0.50 inches per hour in the mountains. With a lot of people recreating and camping in the region, this could become very dangerous very quickly.