An atmospheric river is impacting the central and southern panhandle right now and will continue through Monday afternoon. Temperatures have rose to be above 6000 feet and is melting snow at elevation to increase the amount of runoff in addition to the runoff from the heavy rain. Minor flooding for ponding on roadways due poor drainage and rapid rises on small streams from the heavy rain and snowmelt may exceed bankful and go out of their banks. Rain accumulations over the past 24 hours have ranged from 1.5 to 3 inches over the watch area. Additional rainfall of 3 to 5 inches is expected through Monday afternoon. At this time, there is around a 50% chance to exceed 5 year 24 hour return intervals by Monday morning, with heaviest rates Sunday evening. Near Metlakatla and Ketchikan, with these rates, along with increased likelihood of wind gusts greater than 40 mph Sunday night, and recent snowmelt, conditions for isolated landslides in steep terrain are possible. For the central panhandle, including Petersburg and Wrangell, additional rain accumulations of 2.0-3.0 inches is expected through Monday afternoon. * WHAT...Flooding caused by rain and snowmelt continues to be possible. * WHERE...The following areas, Prince of Wales, Southern Inner Channels and Central Inner Channels. This includes the cities of Petersburg, Kake, Port Alexander, Craig, Klawock, Hydaburg, Coffman Cove, Thorne Bay, Wrangell, Ketchikan, And Metlakatla. * WHEN...Through Monday afternoon. * IMPACTS...Excessive runoff combined with snowmelt may result in flooding of rivers, creeks, streams, other low-lying areas and flood-prone locations. Ponding on roadways from extensive runoff is also possible. In the Petersburg and Wrangell areas, there might be flooding of roadways due to snow, ice, and other debris clogging storm drains is possible. * ADDITIONAL DETAILS... - National Weather Service Meteorologists are forecasting heavy rainfall on a primed snowpack, which may lead to increased runoff and possible isolated landslides in prone areas. Heavy rain is falling on the existing snowpack to increased runoff from high freezing levels. Stream flows in small streams have begun to increase quickly and may reach minor flood stage over the Sunday night hours. Storm total rain accumulations could be between 5.0-8.0 inches for the southern panhandle, and 3.5-5.0 inches for the central panhandle.