Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 233 AM EST Tue Jan 30 2024 Valid 12Z Tue Jan 30 2024 - 12Z Thu Feb 01 2024 ...Heavy snow over parts of the Sierra Nevada Mountains on Wednesday... ...There is a Slight Risk of excessive rainfall over parts of Northern/ Central California... ...Snow over parts of the Great Lakes/Central Appalachians into the Northeast... Low pressure over the Upper Great Lakes will move southeastward to the Southeast by Wednesday and redevelop over the Western Atlantic by Wednesday evening. The system will produce mostly snow over the Great Lakes and rain and snow over the Ohio Valley. In addition, overnight Tuesday, light snow will develop over the higher elevations of the Central Appalachians and light rain at lower elevations. Also, overnight Tuesday, rain will develop over the Southern Appalachians and the Mid-Atlantic. All the precipitation will end by Wednesday evening. Moreover, overnight Wednesday, a front moving out of East-Central Canada will move into the Great Lakes and Northeast on Thursday. The system will aid in creating light snow over parts of Upstate New York and Northern New England Wednesday night into Thursday. Meanwhile, a plume of moisture will move over parts of the Pacific Northwest, producing areas of light rain over the Northwest on Tuesday. On Wednesday, a more robust plume of moisture will move over California ahead of a front moving onshore late Wednesday afternoon into Thursday. The moisture will create heavy rain over California. Therefore, the WPC has issued a Slight Risk of excessive rainfall over parts of Northern/Central California from Wednesday into Thursday morning. The associated heavy rain will create mainly localized areas of flash flooding, with urban areas, roads, small streams, and burn scars the most vulnerable. Furthermore, the moisture will also create snow over parts of Northern/Central California. The Shasta and Sierra Nevada mountains will get heavy snow from late Wednesday morning into Thursday. Ziegenfelder Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php