Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 249 PM EST Wed Jan 21 2015 Valid 00Z Thu Jan 22 2015 - 00Z Sat Jan 24 2015 ...Heavy rain possible from the Western Gulf Coast to the Eastern Gulf Coast... ...Snow over the Southern High Plains... ...Temperatures will be 10 to 25 degrees below average over the Southern Rockies/High Plains... Developing upper-level low over the Southwest will slowly move eastward to the Southern Plains by Friday. The system will pull moisture off the Western Gulf of Mexico that will aid in producing light to moderate snow over portions of the Southern Rockies/High Plains through Thursday evening. Light to moderate rain will develop over the Southern Plains that will wane to light rain by Friday morning. The light to moderate rain will move eastward to the Central Gulf Coast and the Southeast Thursday evening into Friday. Along with the rain, showers and thunderstorms may develop over parts of the immediate Gulf Coast through Friday. Meanwhile, low pressure over the Eastern Ohio Valley will get absorbed into a low off the Mid-Atlantic Coast on Thursday. The off shore low will move northeastward to the Northeastern Coast of Canada by Friday. The energy will produce light snow over parts of the Northern Mid-Atlantic on Wednesday evening that moves eastward to the parts of Southern New England Coast by Thursday morning before ending. In addition, upper-level energy skirting the Northwest Coast will produce mostly rain over parts of the Pacific Northwest Coast through Friday. Additionally, weak upper-level energy moving over the Upper Great Lakes will trigger light snow over parts of the Upper Great Lakes on Friday morning. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php