Baltimore Harbor & Patapsco River Marine Forecast
| Tonight...S Winds 5 To 10 Kt. Gusts Up To 20 Kt This Evening. Waves 1 Ft Or Less. |
| Fri...S Winds 5 To 10 Kt. Gusts Up To 20 Kt In The Afternoon. Waves 1 Ft Or Less. |
| Fri Night...Sw Winds 5 To 10 Kt. Gusts Up To 20 Kt Until Early Morning. Waves 1 Ft. Numerous Showers. |
| Sat...N Winds 5 Kt. Waves Less Than 1 Ft. |
| Sat Night...E Winds 5 Kt. Waves Less Than 1 Ft. |
| Sun...S Winds 5 To 10 Kt With Gusts To 20 Kt. Waves 1 Ft. |
| Sun Night...Sw Winds 5 To 10 Kt With Gusts To 20 Kt. Waves 1 Ft. A Chance Of Rain. |
| Mon...Nw Winds 10 To 15 Kt. Waves 1 Ft. A Chance Of Rain In The Morning. |
| Tue...N Winds 5 To 10 Kt...Becoming S. Waves 1 Ft Or Less. |
| Area Forecast Discussion ...UPDATED National Weather Service Baltimore MD/Washington DC 850pm EDT Thu Mar 19 2026 .WHAT HAS CHANGED... Nothing. .KEY MESSAGES... -1) A warming trend ensues through Saturday, with rain chances by late Friday. -2) Temperatures warm through the weekend with a cold front bringing showers; cooler temperatures early next week with a modification of temperatures during midweek ahead of another cold front. KEY MESSAGE 1...A warming trend ensues through Saturday, with rain chances by late Friday. Seasonably cool weather is likely tonight given a persistent surface ridge with lows in the 30s. By Friday, further warming is anticipated ahead of a quick moving clipper system. Daytime temperatures push well into the 60s, but with increasing clouds through the day. As gradients tighten ahead of this system, 850-700 mb westerly winds pick up in strength, generally averaging around 30 to 40 knots. Some of this could mix down across the Alleghenies, particularly on Friday afternoon. Showers arrive later in the day. Moisture is likely to be limited which should hold total amounts to around 0.10 to 0.25 inches, though locally higher amounts are possible in any heavier showers especially along and west of the Allegheny Front. Rain showers continue Friday evening and into the night before drying out by sunrise on Saturday. Despite the cold frontal passage with this clipper system, a mainly west to northwesterly wind will yield a dry and very well mixed boundary layer on Saturday. With potential mixing into the 850-750 mb layer, forecast highs push well into the 60s to low 70s. Spotty mid 70s are possible closer to I-64. KEY MESSAGE 2...Temperatures warm through the weekend with a cold front bringing showers; cooler temperatures early next week with a modification of temperatures during midweek ahead of another cold front. Plenty of sunshine on Sunday. A warm south to southwest wind will bring temperatures up to nearly 20 degrees above average into the middle to upper 70s with slightly cooler temperatures in the mountains in the west and in Northeast Maryland. Dry conditions expected until Sunday night when showers and a thunderstorm or two are expected to accompany the front. A few showers could linger across the Virginia Piedmont and southern Maryland Monday morning; otherwise, drier and colder air will push into the region from the northwest and temperatures will be noticeably colder than Sunday but still close to average reaching the upper 50s to lower 60s in most places. Temperatures on Monday may actually steadily fall through the day when the high temperature occurs early in the morning. Dry and cold conditions will continue on Tuesday as high pressure builds into the region then off to the east Tuesday night and early Wednesday. The high should shift east Wednesday to allow for a light to moderate return flow into the region. This wind direction should bring our high temperatures back up to near average, then even higher to above average for Thursday. This would be ahead of the next cold front later next week. Marine High pressure continues its presence along the Atlantic coast. Otherwise, through midday Friday, southerly winds should stay below advisory levels. However, expect a further uptick ahead of a quick moving clipper system as winds turn more south to southwesterly. Small Craft Advisories have been issued from Friday late morning into the night as gusts push to around 20-25 knots. Post-frontal northwesterlies actually decrease a bit on Saturday before light southerlies return by late Saturday, though SCAs (Small Craft Advisories) may need to be extended into Saturday for portions of the waters. Small Craft Advisories likely Sunday afternoon through Monday night. Winds south to southwest 5 to 15 knots Sunday, increasing 10 to 15 knots gusts of 20 knots Sunday night. Winds southwest shifting northwest 10 to 20 knots gusts 25 to 30 knots Monday into Monday night. NOAA Baltimore MD/Washington DC Office: Watches - Warnings - Advisories DC...None. MD...Small Craft Advisory from 11am Friday to 5am EDT Saturday for MDZ008. VA...None. WV...None. Marine Small Craft Advisory from 11am Friday to 5am EDT Saturday for ANZ530>543. Small Craft Advisory until 10pm EDT this evening for ANZ531>534-538. |
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