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Tropical Storm Fay Forecast Discussion Number 2
2020-07-10 04:39:35| National Hurricane Center (Atlantic)
Issued at 1100 PM EDT Thu Jul 09 2020 000 WTNT41 KNHC 100239 TCDAT1 Tropical Storm Fay Discussion Number 2 NWS National Hurricane Center Miami FL AL062020 1100 PM EDT Thu Jul 09 2020 Satellite imagery and surface observations indicate that the circulation center of Fay is elongated northeast-southwest, with satellite and radar data showing a strong convective cluster at the northeastern end of the elongation. There have been no observations near the center during the past few hours, and the initial intensity is held at 40 kt based mainly on continuity from the previous advisory. An Air Force reserve Hurricane Hunter aircraft is currently enroute to investigate Fay. Due to the elongated center and the possibility the center is trying to re-form near the convection, the initial motion is a somewhat uncertain 010/7. There is no change to the forecast philosophy from the previous advisory, and essentially no change to the forecast track. Fay is expected to move generally northward between a high pressure ridge over the western Atlantic and an approaching mid-latitude trough for 24-36 h, followed by a turn toward the north-northeast until dissipation between 60-72 h. The guidance is in generally good agreement with this scenario, and the new forecast lies close to the various consensus models. Fay is currently over the Gulf Stream and within an area of light to moderate westerly shear caused by an upper-level trough to its west and southwest. This is producing an environment that should allow a little strengthening for the next 12-24 h. After that, the storm should weaken as it passes over cooler waters north of the Gulf Stream, followed by landfall over the northeastern United States. The new intensity forecast follows the trend of the previous forecast in calling for extratropical transition between 48-60 h and dissipation shortly thereafter. Key Messages: 1. Fay is expected to produce 3 to 5 inches of rain with isolated totals of 8 inches along and near the track across the mid-Atlantic states into southeast New York and southern New England. These rains may result in flash flooding where the heaviest amounts occur. Widespread river flooding is not expected at this time. 2. Tropical storm conditionsare expected along portions of the mid-Atlantic and northeast coast Friday and Friday night, and a Tropical Storm Warning is in effect for the coasts of New Jersey, New York and Connecticut, including Long Island. FORECAST POSITIONS AND MAX WINDS INIT 10/0300Z 36.3N 74.8W 40 KT 45 MPH 12H 10/1200Z 37.7N 74.6W 45 KT 50 MPH 24H 11/0000Z 39.9N 74.1W 45 KT 50 MPH 36H 11/1200Z 43.0N 73.3W 30 KT 35 MPH...INLAND 48H 12/0000Z 46.7N 71.7W 25 KT 30 MPH...INLAND 60H 12/1200Z 50.2N 69.3W 25 KT 30 MPH...POST-TROP/EXTRATROP 72H 13/0000Z...DISSIPATED $$ Forecaster Beven
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