Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 225 AM EST Tue Dec 30 2014 Valid 12Z Tue Dec 30 2014 - 12Z Thu Jan 01 2015 ...Temperatures will be 25 to 40 degrees below average over the Plains... ...Snow for the Mogollon Rim into Southern Utah... Cold high pressure over the Northern High Plains will sink southeastward to the Southern Plains by Wednesday evening. Upslope flow will aid in producing light snow over parts of the Central/Southern High Plains that will slowly wane over the area by Wednesday evening. An area of snow and sleet will develop over parts of Western Texas late Tuesday night into Wednesday morning. Likewise, an upslope component will aid in the development of light rain over parts of the Lower Rio Grande Valley Tuesday afternoon into Wednesday. In addition, an upper-level low will develop over California/Southwest and the Great Basin Tuesday into Wednesday. The energy will trigger light snow over parts of the Great Basin on Tuesday that will expand into parts of the Southwest on Wednesday. Light rain will also develop over parts of Southern California and the Southwest on Wednesday. Meanwhile, upper-level energy over the Ohio Valley will induce a wave of low pressure along a front just off the Southeast Coast on Tuesday morning. The energy will trigger light snow over parts of the Central Appalachians and rain over parts of the Southern Mid-Atlantic on Tuesday. Light rain will also develop over parts of Florida near a lingering front over the southern parts of the state through Wednesday evening. Additionally, upper-level energy moving over the Upper Great Lakes will aid in producing light snow over parts of the region through Wednesday evening. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php