National Weather Service United States Department of Commerce

Severe Thunderstorm Threat From the Central Plains to the Northeast; Extreme HeatRisk for the East Coast

Strong to severe thunderstorms are possible from the central Plains to the Northeast through this evening. Widespread damaging winds are the primary threat but hail and a tornado or two is also possible. Extremely dangerous heat continues across the Eastern U.S. Warm overnight low temperatures will provide little to no relief. Read More >

Map of estimated Water Temperatures
List of Water Temperature observations (at bottom of page/list)


Latest Marine Discussion:
.MARINE... Southwest winds continue to reach marginal advisory levels across the wide waters of the middle bay early this morning. There could be a brief break in this area during the mid to late morning (with lighter winds continuing elsewhere). Southwesterly flow will then increase again this afternoon across all waters. While marginal and perhaps sporadic, thought it was best to cover this with an advisory. Thunderstorms with strong winds will become also become more likely this afternoon and evening as a cold front approaches with Special Marine Warnings likely. Winds become northerly Thursday behind the front. A few thunderstorms are possible near southern Maryland through Thursday but seem unlikely to be strong. There's still some potential for northerly channeling down the bay Thursday night, but it would be marginal for an advisory. Lighter winds are expected Friday and Friday night as high pressure builds to the north and the front stalls to the south. Sub-SCA winds are expected for the waters for the weekend. Cannot completely rule out an SMW for any potential strong thunderstorms that cross the waters either afternoon/evening. Update as of: 405 AM EDT Wed Jul 17 2024


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[LWX marine zones]

ANZ535 ANZ536 ANZ537 ANZ530 ANZ538 ANZ531 ANZ539 ANZ532 ANZ540 ANZ533 ANZ542 ANZ534 ANZ543 ANZ541


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