Marine Interpretation Message
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000 AGNT40 KWNM 230731 MIMATN Marine Weather Discussion for N Atlantic Ocean NWS Ocean Prediction Center Washington DC 331 AM EDT Sat Sep 23 2017 .FORECAST DISCUSSION...Major features/winds/seas/significant .weather for the North Atlantic Ocean W of 50W from 30N to 50N. Note: Warnings are preliminary, and will be modified based on the next NHC advisory for Hurricane Maria. KEY MESSAGES: 1. Swells from Maria are expected to increase along the coast of the southeastern United States and will likely cause dangerous surf and life-threatening rip currents for the next several days. 2. Maria will move between the east coast of the United States and Bermuda by the middle of next week, but it is too soon to determine what, if any, direct impacts there might be in these areas. 3. For more information on the flooding and rip current hazards in the United States, please monitor information from your local National Weather Service forecast office at Over the short term, Post-Tropical Cyclone Jose is still forecast to weaken over northern NT2 waters today through Sun, and then likely dissipate by Mon. The preliminary 06Z OPC-NCEP surface analysis indicated that Post-Tropical Cyclone Jose was centered near 39N 69W with a central pressure of 1004 mb. It will drift toward the east and southeast through tonight into Sun, and then stall later Sun into early Mon over NE NT2 waters as it dissipates. An evening ASCAT pass indicated a small area of gale force winds just west of the center of Jose. The latest observations indicate that the winds are continuing to diminish, and will likely fall to below gale force by the time of the forecast issuance around 0500 AM EDT. The 00Z models are in pretty decent agreement regarding the future of Jose and the surrounding weather features today into early Sun. We will populate using the 00Z GFS 10 meter winds during this time frame, with no major changes anticipated from the previous forecast for the early morning package. The main forecast challenge will continue to be the future track and intensity of Hurricane Maria currently located to the east of the Bahamas. Nearly all of the 00Z model guidance suggests that Maria will trend further to the west. We expect tropical storm to hurricane conditions to spread north with Maria, and reach SE NT2 waters Sun afternoon, and then spread further north into portions of the NT2 waters Sun night into Wed night. The early morning package will be based on the latest NHC advisory on Maria. Please closely monitor the latest NHC advisory, WFO coastal forecast, and OPC forecast over the next few days. As far as sea heights are concerned, the latest observations indicate that the 00Z Wavewatch III is running around 2 feet too high over most of the NT1 into the northern NT2 waters early this morning, with the ECMWF WAM a little closer to these observations. For the early morning package we will use a 80 percent WAM, and 20 percent Wavewatch blend for today into early Sun. Additional adjustments will be made for Sun afternoon through Wed night, based on the latest NHC advisory on Maria. .Extratropical Storm Surge Guidance...The surge along the western Long Island, New Jersey and Delmarva coasts appears to be running about 1/2 ft higher than is forecast by the latest ESTOFS or ETSS. As post-tropical cyclone Jose continues to weaken over the next few hours, these values should diminish as well. For surge information related to Maria please see the latest information provided by NHC. .WARNINGS...Preliminary. .NT1 New England Waters... .None. .NT2 Mid-Atlantic Waters... .ANZ920...Baltimore Canyon to the Great South Channel... Tropical Storm Possible Wednesday into Wednesday night. .ANZ925...Outer Waters from Baltimore Canyon to Hatteras Canyon... Tropical Storm Possible Monday night into Tuesday. Hurricane Possible Tuesday night into Wednesday night. .ANZ830...Inner Waters from Currituck Beach Light to Cape Hatteras... Tropical Storm Possible Tuesday night. .ANZ833...Inner Waters from Cape Hatteras to Cape Fear... Tropical Storm Possible Tuesday night. .ANZ930...Outer Waters from Hatteras Canyon to Cape Fear... Tropical Storm Possible Sunday night. Hurricane Possible Monday into Wednesday. Tropical Storm Possible Wednesday night. .ANZ935...Outer Waters from Cape Fear to 31N... Tropical Storm Sunday. Tropical Storm Possible Sunday night. Hurricane Possible Monday into Tuesday. Tropical Storm Possible Tuesday night. $$ .Forecaster Mills. Ocean Prediction Center. is the U.S. government's official web portal to all federal, state and local government web resources and services.