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Tropical Storm Fay Forecast Discussion Number 7

2020-07-11 04:34:56| National Hurricane Center (Atlantic)

Issued at 1100 PM EDT Fri Jul 10 2020 000 WTNT41 KNHC 110234 TCDAT1 Tropical Storm Fay Discussion Number 7 NWS National Hurricane Center Miami FL AL062020 1100 PM EDT Fri Jul 10 2020 Satellite and radar data indicate that Fay is no longer generating organized deep convection as the center moves into northern New Jersey. A combination of radar, aircraft, buoy, and ship data show that 30-35 kt winds are occurring over the water south of central and western long Island, and based on this the initial intensity is reduced to 35 kt. The central pressure of 1001 mb is based on surface observations. Barring the return of convection, Fay should continue to weaken and become post-tropical on Saturday. After that, the system is expected to dissipate on Sunday as it merges with a frontal system over southeastern Canada. The new intensity forecast has only minor tweaks from the previous forecast. The initial motion is now northward or 005 degrees at 15 kt. The track forecast philosophy is unchanged, as Fay will be steered generally northward and north-northeastward until dissipation between a mid-level ridge over the western Atlantic and an approaching shortwave trough moving across the Great Lakes. The storm is moving a little to the left of the previous forecast, so the new forecast is nudged to the left due mainly to the initial position and motion. The new forecast lies close to the consensus models. Users should not place too much emphasis on the exact track of the center of Fay, as the heaviest rain and strongest winds are now occurring well away from the center. Key Messages: 1. Heavy rainfall from eastern Pennsylvania, northeast New Jersey and across southeast New York, into portions of New England may result in flash flooding and urban flooding in areas with poor drainage. Isolated minor flooding is possible; however, widespread river flooding is not expected. 2. Tropical storm conditions are expected for several more hours over portions of coastal New York and Connecticut, including most of Long Island. FORECAST POSITIONS AND MAX WINDS INIT 11/0300Z 41.0N 74.2W 35 KT 40 MPH...INLAND 12H 11/1200Z 43.6N 73.4W 30 KT 35 MPH...POST-TROP/INLAND 24H 12/0000Z 47.5N 71.5W 25 KT 30 MPH...POST-TROP/INLAND 36H 12/1200Z 51.1N 68.9W 25 KT 30 MPH...POST-TROP/INLAND 48H 13/0000Z...DISSIPATED $$ Forecaster Beven

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