Tidal Potomac from Indian Head to Cobb Island MD Marine Forecast
| Rest Of The Overnight...E Winds 5 Kt. Waves Flat. A Slight Chance Of Snow. Vsby 1 To 3 Nm. |
| Today...N Winds Around 5 Kt. Waves 1 Ft. |
| Tonight...N Winds Around 5 Kt. Waves 1 Ft. |
| Sat...Ne Winds Around 5 Kt. Waves 1 Ft Or Less. |
| Sat Night...Ne Winds Around 5 Kt. Waves 1 Ft Or Less. A Chance Of Snow. |
| Sun...Nw Winds 5 To 10 Kt. Waves 1 Ft. |
| Sun Night...N Winds 5 To 10 Kt. Waves 1 Ft. |
| Mon...S Winds 5 To 10 Kt. Waves 1 Ft. |
| Tue...S Winds 5 To 10 Kt. Waves 1 Ft. |
| Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 327am EST Fri Jan 2 2026 Synopsis High pressure briefly returns to the area today. Low pressure approaches from the south Saturday, bringing the potential for wintry precipitation to portions of the area. High pressure returns Sunday before another system approaches early next week. Near Term - Through Tonight A departing upper trough continues to produce light wintry mix (mostly freezing drizzle) in the Alleghenies early this morning. This is expected to quickly wane after sunrise. The ongoing Winter Weather Advisory will be continued through late morning. Beyond that, dry conditions are expected for the rest of the area / rest of the day as weak high pressure passes overhead then moves offshore. A period of sunshine peaks through the clouds this afternoon, but expect skies to fill in again this evening into tonight. Highs today range from mid 30s along I-70 to mid to upper 40s in central VA. Cold and dry tonight, with lows in the upper teens to 20s. Short Term - Saturday Through Sunday Night A southern stream wave of low pressure moving across the Carolinas on Saturday could bring some light wintry precipitation to parts of the area. The system won't really phase with a northern stream system coming in from the Great Lakes until both are well offshore. Weak high pressure over southern Quebec will keep marginally cold air in place, but mostly over the northern half of the area, while most of the Quantitative Precipitation Forecast will be over the southern half where temps are mostly above freezing. As a result, most of the guidance is pointing toward a light rain/snow mix south of I-66/US-48 Saturday afternoon, becoming a mostly light snow east of US-15 after sunset. Little to no snow accumulation is forecast at this time, though will continue to monitor in case there is any northern trend in the guidance over the next 24-36 hours. If any wintry precipitation sticks, some travel disruptions are possible late Saturday afternoon into Saturday night, especially on elevated and untreated surfaces. A weak cold front moves through the area early Sunday that brings dry and gusty conditions to end the weekend. Cooler highs on Sunday in the 30s to low 40s, with a mix of sun and clouds. Long Term - Monday Through Thursday High pressure will progress offshore on Monday as upper troughing tracks well out to sea. Cool temperatures and light winds are expected. Temperatures are forecast to climb into the mid 30s to mid 40s beneath mostly cloudy skies. As we move toward the middle of the week, the flow pattern across the CONUS will become more zonal and progressive in nature. This will allow for more of a Pacific airmass to overspread the CONUS, leading to warmer temperatures and lots of cloud cover. A quick moving disturbance will pass to our north through the Great Lakes Tuesday into Tuesday night. While some showers appear possible in the Alleghenies, not much is expected to spread east of the mountains. Forecast uncertainty begins to increase by Wednesday into Thursday, but the vast majority of ensemble solutions favor continued dry conditions. Mostly cloudy skies are expected, along with warmer temperatures. Highs are forecast to make it into the 50s by Wednesday and Thursday, and could even near 60 if warmer solutions were to verify. Marine Favorable marine conditions are expected today and for most of the weekend, though there will be a couple of times to watch for possible elevated winds. The first is tonight as high pressure moves offshore, with northerly winds increasing slightly to 10-15 knots tonight. Then, another period of elevated winds looks possible Sunday afternoon as northerly channeling increases behind a cold frontal passage. Sub-SCA (Small Craft Advisory) level southerly winds are expected over the waters on both Monday and Tuesday. NOAA Baltimore MD/Washington DC Office: Watches - Warnings - Advisories DC...None. MD...Winter Weather Advisory until 11am EST this morning for MDZ509. VA...None. WV...Winter Weather Advisory until 11am EST this morning for WVZ501-505. Marine None. |
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