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Short Range Public Discussion
(Caution: Version displayed is not the latest version. - Issued 0758Z Feb 29, 2024)
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Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 258 AM EST Thu Feb 29 2024 Valid 12Z Thu Feb 29 2024 - 12Z Sat Mar 02 2024 ...Heavy snow over parts of the Cascades, the Northern Intermountain Region, Northern Rockies, Northern California, and Sierra Nevada Mountains... ...Heavy lake-effect snow southeast of Lake Ontario and over the Upper Great Lakes... ...Rain from the Gulf Coast to parts of northern Mid-Atlantic and shower and thunderstorms along the Central Gulf Coast and Southeast... A second winter storm will impact the West Coast on Thursday and Friday. The storm will create heavy mountain snow that will affect many passes. Multiple feet of snow are likely (over 80% chance) for higher elevations, especially above 5000 feet, including many Cascade and Sierra Nevada Mountain passes. Extremely heavy snow rates surpassing 3 inches per hour are likely. Furthermore, the storm will produce blizzard conditions in the Sierra Nevada Mountains. In detail, strong winds will cause significant blowing/drifting snow and whiteout conditions, making travel impossible in the Sierra Nevada Mountains. There is a high chance (over 70%) of substantial, long-lasting disruptions to daily life in the higher elevations of the Sierra Nevada Mountains Friday-Saturday, where blizzard conditions and 5+ feet of snow are expected. Moreover, in addition to the snow, coastal rain will develop over parts of the Pacific Northwest Thursday into Saturday. Coastal rain will develop over parts of California Thursday morning, continuing into Saturday. In addition, the widespread damaging wind will develop over the Western U.S. Wind gusts of 55+ mph are forecasted across much of the West, particularly across higher elevations and the Intermountain West, where 75+ mph gusts are possible. These winds would likely down trees and power lines, resulting in power outages across affected areas. Further, cold air will lower snow levels Friday into Saturday. As the storm moves south, snow levels will lower into some Northern California and Sierra Nevada Mountain foothill communities. Much colder air is forecast for Saturday, with temperatures 10-20 degrees below normal. Meanwhile, upper-level energy moving across the Great Lakes into the Northeast will create lake-effect snow over the northeast portion of the U.P. of Michigan, with the heaviest lake-effect snow southeast of Lake Ontario on Thursday. Additionally, upper-level energy moving over the Southern Rockies will move eastward to the Mid-Atlantic by Saturday, producing rain and higher-elevation snow over the Southern Rockies Thursday. Overnight Thursday, showers and thunderstorms will develop over parts of the Southern Plains, moving into the Lower Mississippi, Tennessee, and Southern Ohio Valleys and parts of the Southeast by Friday. The showers and thunderstorms will continue over parts of the Southeast through Saturday. On Friday, rain will move into parts of the Mid-Atlantic and Ohio Valley, moving into parts of the Northeast by Saturday. Also, on Friday, scattered pockets of rain/freezing rain will develop over the highest elevations of parts of the Central/Southern Appalachians. Ziegenfelder Graphics available at