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Short Range Public Discussion
(Latest Discussion - Issued 1711Z Feb 25, 2018)
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Short Range Forecast Discussion...Corrected NWS Weather Prediction Center College Park MD 1211 PM EST Sun Feb 25 2018 Valid 00Z Mon Feb 26 2018 - 00Z Wed Feb 28 2018 ...Heavy rain/flash flooding possible near Louisiana today/tonight and near northern Mississippi Tuesday... ...Heavy snow possible over parts of the Cascades, Northern Rockies, and Sierras... ...Snow/freezing rain possible over parts of Northern New England... A pair of cold fronts moving into the West will produce rain near the coast and interior/higher elevation snow at times near the coastal ranges and the northern Continental Divide through Tuesday. The pattern remains unsettled due to cold air aloft sponsored by a pair of upper level disturbances. Snow today and tonight is expected to be heavy which has led to winter storm warnings for the Cascades and northern Continental Divide, with greater than a foot of snow expected within the Oregon Cascades. High Wind Watches are in effect east of the Divide for portions of Wyoming into Sunday morning as the pressure gradient increases ahead of the first frontal zone. As a deep cyclone near the Great Lakes lifts through eastern Canada, snow/freezing rain is deposited to its east within a cold airmass over parts of Northern New York and interior New England this afternoon and evening where winter weather advisories are currently in effect. To the south, the combination of a pre-frontal trough and the tail end of the cyclone's cold front keep the threat of heavy rain in the cards across eastern Texas, Louisiana, and western Mississippi into this evening, along with a marginal risk of severe weather per guidance from the Storm Prediction Center. As a cyclone aloft develops across the Southwest with time, return flow from the Gulf of Mexico lifts the frontal zone northward into the Lone Star State and brings a renewed threat of rain/thunderstorms to Texas Tuesday morning which spreads northeast across the Southeast and Lower Mississippi Valley during the day Tuesday. Some of the rain could be heavy and poses a risk of flash flooding to areas around northern Mississippi on Tuesday and Tuesday night. Roth Graphics available at