Patuxent River to Broomes Island MD Marine Forecast
| Rest Of This Afternoon...S Winds 10 Kt. Waves 1 Ft. Isolated Showers And Tstms. |
| Tonight...E Winds 10 Kt...Becoming N After Midnight. Waves 1 Ft. Scattered Showers. |
| Thu...Ne Winds 10 To 15 Kt With Gusts To 20 Kt. Waves 1 Ft. Showers Likely. |
| Thu Night...Ne Winds 10 To 15 Kt With Gusts To 20 Kt. Waves 1 Ft. Showers. |
| Fri...Ne Winds 10 To 15 Kt With Gusts To 20 Kt. Waves 1 Ft. Showers. |
| Fri Night...E Winds 10 To 15 Kt With Gusts To 20 Kt. Waves 1 Ft. Showers. |
| Sat...Ne Winds 5 To 10 Kt. Waves 1 Ft. Showers. |
| Sun...Ne Winds 5 Kt. Waves Less Than 1 Ft. Showers Likely, Mainly In The Morning. Winds And Waves Higher And Visibilities Lower In And Near Tstms. |
| Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 320pm EDT Wednesday May 20 2026 .WHAT HAS CHANGED... Severe Thunderstorm Watch #234 in effect until 8 PM. Small Craft Advisory issued for the Chesapeake Bay for Thursday and Thursday night. .KEY MESSAGES... - Widespread strong to severe thunderstorms expected into early this evening as a strong cold front crosses, ending the record heat and the severe thunderstorm risk. - Persistent rainfall chances through early next week, with a gradual increase in temperatures again starting late in the weekend. KEY MESSAGE 1...Widespread strong to severe thunderstorms expected into early this evening as a strong cold front crosses, ending the record heat and the severe thunderstorm risk. KEY MESSAGE 1 DESCRIPTION... Storms are developing in a hot and unstable air mass, but with little vertical shear. Main threat remains downburst winds due to hot and moist conditions near the surface and dry air aloft. Cold front will cross the area tonight around 00Z with shifting winds and ending the severe weather risk. However, overrunning showers will be possible through the end of the work week as energy in southwest flow aloft moves along and north of surface boundary. Given large rainfall deficits and stratiform precip, flooding is NOT expected. KEY MESSAGE 2...Persistent rainfall chances through early next week, with a gradual increase in temperatures again starting late in the weekend. KEY MESSAGE 2 DESCRIPTION... Synoptically, looking at a transient/wedge pattern Thursday into the upcoming holiday week. Weak troughing will reside over the Ohio River Valley with high pressure locked across New England/Great Lakes region. The combination of these two features along a stalled front to the south will lead to persistent onshore flow into the region. As a result, expect several days of on and off shower/thunderstorm activity through the remainder of week into the Memorial Day holiday. Sunshine will be limited with plenty of cloud cover expected and cooler than normal temperatures as a result of the east to northeast flow. Highs Thursday will take a 25 to 30 degree dive behind the front with many locations struggling to push 70 degrees. Temperatures will continue to run below normal on Friday, struggling to make it into the 60s. Beginning Saturday and going into Sunday, a warm front begins to slowly meander south of the area and push north of the area on Monday, continuing rain and thunderstorm chances into the start of next week. Temperatures still vary a bit in the ensemble outlooks, but temperatures should start to gradually climb again by Sunday, with early outlooks showing highs in the low 80s again by Tuesday. High pressure moves into the area by midweek. Marine SMWs may be needed for the northern waters late today or this evening. Cdfnt crosses the area overnight with strengthening onshore winds and Small Craft Advisory conditions developing. SCA (Small Craft Advisory) conditions persist through the end of the week. Winds diminish below SCA (Small Craft Advisory) levels on Sunday and Monday, with northeast winds shifting southerly by Monday evening. Climate Records have been broken at IAD and tied at BWI. Both BWI and IAD reached 95 earlier this afternoon. Here are some daily temperature records during the May 19-20, 2026 timeframe: A '+' sign indicates multiple years currently hold that record. A '!' sign indicates the record is forecast to be tied or broken. ***WEDNESDAY, MAY 20TH, 2026*** LOCATION RECORD HIGH (YEAR) RECORD WARM LOW (YEAR) Washington-National (DCA) 96F (1996) 73F (2019) Washington-Dulles (IAD) 93F (1996) 69F (2019) Baltimore (BWI) 95F (1962) 71F (2019)+ Baltimore Inner Harbor (DMH) 97F (1962) 74F (1998)+ Martinsburg (MRB) 97F (1911) 70F (1998) Charlottesville (CHO) 96F (1996) 73F (1996) Annapolis (NAK) 98F (1997) 76F (1898) Hagerstown (HGR) 97F (1996) 66F (1998) NOAA Baltimore MD/Washington DC Office: Watches - Warnings - Advisories DC...None. MD...Small Craft Advisory from 7am to 6pm EDT Thursday for MDZ008. VA...None. WV...None. Marine Small Craft Advisory from 7am to 6pm EDT Thursday for ANZ530>533-538>542. Small Craft Advisory until 11pm EDT this evening for ANZ534- 537-543. Small Craft Advisory from 7am Thursday to 6am EDT Friday for ANZ534-537-543. |
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