314 FXUS01 KWBC 161859 PMDSPD Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 258 PM EDT Fri Oct 16 2026 Valid 00Z Sat Oct 17 2026 - 00Z Mon Oct 19 2026 ...Strong cold front exits the East Coast tonight, ushering in the coldest air of the season with widespread frost and freezing temperatures from the Plains to the East this weekend... ...Nor'easter to develop off the Carolina coast this weekend, with significant coastal flooding and beach erosion possible along portions of the Mid-Atlantic coast into early next week... ...Santa Ana winds, critical fire weather, and unseasonable heat continue across southern California through Saturday... A powerful cold front will push off the East Coast tonight, ending the record and near-record warmth over the Mid-Atlantic and Southeast. A line of strong to locally severe thunderstorms with damaging wind gusts will move across the coastal Mid-Atlantic and southern New England this evening before moving offshore. Gusty northwest winds will follow, and rain will change to snow over the higher terrain of New York and northern New England tonight. A large and unusually strong area of high pressure will bring coldest air of the season so far to much of th central and eastern U.S. Freeze Warnings and Frost Advisories cover much of the Plains, Upper Midwest, and Great Lakes tonight. The cold air will spread into the Ohio and Tennessee Valleys, the Appalachians, and the Mid-Atlantic Saturday night, likely ending the growing season for many locations. Strong north winds and very dry air behind the front will create critical fire weather conditions from east Texas into the lower Mississippi Valley. Meanwhile, the front will stall off the Southeast coast, where a non-tropical low is expected to develop and strengthen well offshore of North Carolina this weekend. Strong and persistent onshore winds will cause coastal flooding and beach erosion. These impacts will begin late this weekend and become significant into early next week from the Delaware bay to the Carolina coast, especially at high tide. Wind gusts could exceed 45 mph near the Outer Banks and the Virginia Tidewater. Farther south, showers and thunderstorms may bring heavy rain and localized flooding to South Florida on Saturday, and dangerous surf will affect the Florida and Georgia coasts. In the West, strong Santa Ana winds and very low humidity will maintain critical fire weather conditions across Southern California through Saturday. Coastal highs in the 90s to near 100 degrees will add a heat risk before the winds east and temperatures fall on Sunday. Elsewhere, a weak Pacific front will bring light rain to the Pacific Northwest on Saturday. Eovino Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php $$