Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 252 AM EST Thu Jan 28 2016 Valid 12Z Thu Jan 28 2016 - 12Z Sat Jan 30 2016 ...Heavy precipitation possible for portions of the Pacific Northwest and northern California... ...Above average temperatures expected for much of the central U.S... A nearly stationary boundary parked over central Florida will maintain showers and thunderstorms for portions of the southeast. 1 to 2 inches of rain is forecast across south Florida, with locally heavier amounts possible. Ponding, and or flash flooding, may occur during periods of intense rainfall. This boundary will move offshore tonight and into Friday. Snow showers are expected across the Great Lakes region as a low pressure system moves through. Snow accumulations are expected to be on the lighter side, with amounts generally less than 6 inches. The most significant areas of snowfall accumulation will occur where there is some lake effect enhancement, downwind of the Great Lakes. A warm front ahead of another area of low pressure will result in scattered areas of generally light snow and freezing rain across portions of the northern plains and Upper Midwest on Friday. Temperatures will continue to run 10 to 20 degrees above climatology for late January for much of the central CONUS. High pressure at the mid and upper-levels will expand across the central U.S. A series of Pacific frontal systems will keep the Northwest and Intermountain West wet and unsettled over the next few days. Rain will spreading inland across the region today, falling as snow in the highest elevations of the Washington Cascades and the higher terrain of the Intermountain region. Cold air streaming into the Northwest will cause snow levels to lower by Friday afternoon, which will result in a larger areal coverage of snow. Accumulations up to 1 foot, with locally higher amounts, is possible for the Cascades and the higher terrain of the Intermountain West/northern Rockies. The Washington and Oregon coastal areas will have significant rainfall, where 2 to 6 inches, with locally higher amounts, is forecast through early Sunday morning. Further down the coast to northern California, 3 to 7 inches with isolated higher amounts, will be possible. This will raise the risk of flash flooding. Please refer to WPC's Excessive Rainfall Outlook for additional information. Campbell Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php