Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 138 AM EST Wed Dec 24 2025 Valid 12Z Wed Dec 24 2025 - 12Z Fri Dec 26 2025 ...There is a High Risk of excessive rainfall over parts of Southern California on Wednesday... ...Moderate to heavy snow over the Northeast and Sierra Nevada Mountains... ...Rain/freezing rain possible over the Pennsylvania and Great Lakes... A system moving off the Northeast Coast by Wednesday morning will have a front lingering across the Southeast through Friday. Moisture streaming northward out of the Gulf will aid in developing rain over parts of the Ohio/Tennessee Valleys through Wednesday afternoon. A wave of low pressure will develop over parts of the Middle Mississippi Valley and move eastward into the Ohio Valley/Central Appalachians by Thursday morning. The system will usher in rain over parts of the Mid-Atlantic by Christmas morning. Along the northern edge of the precipitation shield, pockets of rain/freezing rain will develop over parts of the Great Lakes and Northern Mid-Atlantic overnight Christmas Eve into Christmas Day. In addition, as the low moves away from New England, moderate to heavy snow will develop over New England through Wednesday Afternoon. Snow will continue over the Northeast on Christmas. On Wednesday, moisture and upper-level impulses from the Pacific will stream eastward over the Pacific Northwest/Northern California, as a front moves inland over the West Coast. The system will prod