BOISE, Idaho – The National Weather Service has issued a Flash Flood Watch that includes areas recently burned by wildfire within the Boise National Forest.
Fire and forest officials are watching for potential increased water flows in small creeks or rivers in areas immediately adjacent to the burned mountains.
Heavy rain is possible in the vicinity of the Elk Complex, Pony Complex and Little Queens Fire beginning tonight.
Travelers on roads in these areas should be alert for a possible rapid increase in water flows, leading to a flash flood. This is due to the loss of vegetation on hillsides and in some cases hardened and water repellent soils due to the extreme heat from the recent wildfires.
Increased rock fall is possible, and snag trees or logs could roll down steep embankments.
Road culverts have an increased chance of plugging due to the high flows, and could wash out road surfaces quickly in that case.
Travelers should be cautious if high water is encountered at creek crossings and avoid those areas. In addition, minimizing travel on roads in burned areas is suggested until the flood watch elapses due to the risk of rocks falling onto a road.
The Watch goes into effect at midnight tonight and continues into Tuesday evening for areas including the Boise and West Central Mountains.