National Weather Service United States Department of Commerce

Snow Squalls May Impact New Year's Eve Travel from the Great Lakes to the Mid-Atlantic; Heavy Rain Returns to California

Lake effect snow will continue through Friday bringing significant snowfall to areas east to southeast of the Great Lakes. Snow squalls may impact New Year's Eve travel this evening and overnight across parts of the Great Lakes, Ohio Valley, Mid-Atlantic, and Upstate New York. Heavy rain will bring another flash flooding threat for southern California New Year's Eve into New Year's Day. Read More >

 
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The Pre-Duty Controller Weather Briefing is designed to increase controller situational awareness. It is produced by the Center Weather Service Unit three times daily. After hours or during changing weather this briefing may not represent the latest information. This product does not replace pilot pre-flight briefings.

 

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.AVIATION /15Z WEDNESDAY THROUGH SUNDAY/... Wind gusts of 15 to 25 kts are expected at times later this morning and into the afternoon. Skies will be SCT- BKN as strato/alto cumulus rolling off the mountains. An additional wave of low pressure and reinforcing cold front look to track across the region late tonight into Thursday morning. This may bring an additional period of light flurries or snow showers to the corridor between 07z-12z/2am-7am Thursday. MVFR/IFR vsbys are possible during this time and any light accumulation may have impact due to the cold conditions. Confidence here is low given the limited moisture east of the mountains. Something that will have to monitor given hi-res guidance suggesting the potential for light snow at BWI, MTN, IAD, MRB, HGR, and DCA during the time window above. Any accumulation would be light and likely to occur within a 1-2 hour time window. With this band of snow and the front coming through early Thursday morning will come another round of wind. Expect gusts of 20 to 25 kts Thursday morning into Thursday evening. Winds will gradually diminish Thursday night as high pressure builds back into the region. VFR conditions return Thursday afternoon through Friday as high pressure builds back into the region. Winds will shift from the northwest Thursday to the west Friday. Gusts of 10 to 15 kts Thursday evening and night will decrease to less than 10 kts Friday. VFR conditions are expected for all terminals this weekend with weak high pressure moving in from the west. Winds should largely meander between north to northwesterly. Although gradients are on the weaker side, some afternoon gusts up to 15 knots are possible on Sunday. AVIATION...BRO/DHOF/EST/CPB Update as of: 1030 AM EST Wed Dec 31 2025

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