Tidal Potomac from Key Bridge to Indian Head MD Marine Forecast
| Today...S Winds 5 Kt...Becoming W Late. Waves 1 Ft. Scattered Showers. |
| Tonight...Nw Winds 10 Kt With Gusts To 20 Kt. Waves 1 Ft. A Chance Of Showers. |
| Fri...Nw Winds 10 To 15 Kt With Gusts To 20 Kt. Waves 1 Ft. |
| Fri Night...Nw Winds 5 To 10 Kt. Gusts Up To 20 Kt In The Evening. Waves 1 Ft. |
| Sat...Nw Winds 10 To 15 Kt With Gusts To 20 Kt. Waves 1 Ft. |
| Sat Night...Nw Winds 10 Kt With Gusts To 20 Kt. Waves 1 Ft. |
| Sun...Nw Winds 5 To 10 Kt. Waves 1 Ft. |
| Mon...Nw Winds 5 To 10 Kt. Waves 1 Ft. |
| Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 351am EST Thu Nov 12 2026 .WHAT HAS CHANGED... Small Craft Advisories have been issued for all the waters beginning tonight through Friday. Snow accumulations for the Allegheny Mountains continue to trend downward .KEY MESSAGES... - 1)First accumulating snow for parts of the Alleghenies with rain showers and brisk conditions elsewhere, today through Saturday. - 2) Cooler temperatures and dry condtions expected into the middle of next week. KEY MESSAGE 1...First accumulating snow for parts of the Alleghenies with rain showers and brisk conditions elsewhere, today through Saturday. Showers and perhaps a thunderstorm are expected today into early this evening, mainly in the 18Z-00Z time frame as low pressure tracks across the area. Cdfnt will shift east of the area after 00Z tonight with brisk NW winds developing and temperatures falling from the low 60s into the mid 50s by early evening and into the mid 40s by daybreak Fri. Across the higher elevs, temperatures will fall much more quickly into the upper 20s or low 30s by Fri morning. Off and on snow showers are anticipated across the mountains late tonight into Sunday morning. Despite plenty of cold air to support snow, snow accumulations have continued to trend downward as a result of unfavorable low-level trajectories. This still looks like a light snow event of 1 to 2 inches falling over a 24-hr period, which does not meet the criteria for a Winter Weather Advisory. Elsewhere, light rainfall accumulations of a tenth to two tenths of an inch are expected, mainly this afternoon. Continued brisk conditions are expected into Monday with plenty of stratocumulus clouds during the daytime hours. KEY MESSAGE 2...Cooler temperatures and dry condtions expected into the middle of next week. Longwave troughing will remain over the east coast through early next week, although heigheights will start rising Monday as the amplified upper level pattern slowly progresses eastward. Likewise, low level trajectories will gradually become less favorable for upslope snow showers Sunday. Winds should be much less noticeable by Monday and Tuesday as the surface high finally reaches the Mid Atlantic, although temperatures remain below normal. Given the lighter winds, the subsequent nigheights could turn out colder in many areas, with widespread near or below freezing temperatures outside of the urban centers and tidal shoreline. Further upper level amplification will likely happen toward mid week. While a trough or low could develop toward the southeast coast, it appears that ridging will dominate the Mid Atlantic. This should start a warming trend beginning Wednesday. Marine Winds will strengthen this evening after frontal passage with freq gusts to 20 kt expected. Winds strengthen further Fri into Sat with gusts to 30 kt expected. Small Craft Advisory conditions will continue in northwest flow through probably Monday. Winds will start decreasing Sunday night and Monday as high pressure nears, although marginal advisory conditions may persist along the bay for a time. Tides / Coastal Flooding Action Stages are likely tonight before winds shift to northwest behind a cold front this evening. Annapolis is now forecast to reach minor coastal flooding with the high tide this evening. A strong frontal passage will bring a prolonged period of blowout tides Friday and through early next week. NOAA Baltimore MD/Washington DC Office: Watches - Warnings - Advisories DC...None. MD...Small Craft Advisory from 6pm this evening to 6pm EST Friday for MDZ008. VA...None. WV...None. Marine Small Craft Advisory from 6pm this evening to 6pm EST Friday for ANZ530>543. |
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