* WHAT...Heavy snow expected. Total snow accumulations 1 to 2 feet. Winds gusting as high as 65 mph creating blowing and drifting snow and whiteout conditions. * WHERE...Wyoming, Chautauqua, Cattaraugus, and Southern Erie Counties. * WHEN...From 1 PM Monday to 1 AM EST Friday. * IMPACTS...Whiteout conditions are expected and will make travel treacherous and potentially life-threatening. Travel will be very difficult. The hazardous conditions will impact travel through the week. * ADDITIONAL DETAILS...Lake effect snow is expected oscillate several times downwind of Lake Erie this week. Forecast snowfall amounts could be much higher where lake bands persist during this long duration event. The strongest winds will be Monday and Monday night.

* WHAT...Significant lakeshore flooding expected. Rapid rises are expected Monday morning with the highest levels late Monday morning and afternoon. * WHERE...Erie and Chautauqua counties. * WHEN...From 5 AM to 10 PM EST Monday. * IMPACTS...The rapid rise in water levels will result in lakeshore flooding along the Lake Erie and Upper Niagara River shores. Along the Lake Erie shore, flooding is likely along Route 5 in Hamburg, Buffalo Harbor and Canalside, Dunkirk Harbor, and other flood prone locations.

* WHAT...Southwest winds 35 to 45 mph with gusts up to 70 mph expected. * WHERE...Erie, Niagara, Orleans, Monroe, Genesee, Wyoming, and Chautauqua Counties. * WHEN...From 4 AM Monday to 1 AM EST Tuesday. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Shallow rooted trees in a saturated ground will be more susceptible to falling. Travel will be difficult, especially for high profile vehicles.

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of western New York, including the following counties, Allegany, Cattaraugus, Chautauqua, Genesee, Niagara, Northern Erie, Orleans, Southern Erie and Wyoming. * WHEN...From 1 PM EST this afternoon through Monday afternoon. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. The greatest threat for flooding will be along the Buffalo area creeks and rivers. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - Widespread rainfall totals of 1-1.5 inches are expected within the watch area. Locally higher amounts are possible, especially across the Niagara Frontier. - http://www.weather.gov/safety/flood