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| #1014860 (Received by flhurricane at: 4:56 PM 01.Sep.2020) TCDAT5 Tropical Storm Omar Discussion Number 5 NWS National Hurricane Center Miami FL AL152020 500 PM EDT Tue Sep 01 2020 Satellite images show that the system remains sheared with a bursting pattern on satellite, occasionally exposing the center, and a large area of curved bands in the southeastern quadrant of the circulation. Almost all of the subjective and objective Dvorak estimates, along with SATCON values, are between 35 to 40 kt, and the lower number is chosen as the initial wind speed since scatterometer data suggests 30 to 35 kt. This makes Omar the 15th named storm of the 2020 Atlantic hurricane season, and is the earliest 15th storm on record, besting the previous mark by about a week from Ophelia of 2005. Any chance for strengthening should end by tomorrow afternoon due to greatly increasing shear, and weakening is likely to commence by then. The persistence of the shear should cause the cyclone to decay into a remnant low in about 48 hours, if not sooner. No significant changes were made to the previous forecast, which is near the model consensus. The initial motion remains east-northeast or 065/13 kt. The cyclone is being steered by the northern side of the subtropical ridge, which is forecast to cause a similar motion through tomorrow and an eastward turn late week due to the orientation of the ridge. The only notable change to the forecast is a slow down at long range in most of the guidance, probably due to a shallow system no longer feeling the stronger deep-layer winds, so the NHC track prediction follows suit. The remnant low should dissipate in 4-5 days. FORECAST POSITIONS AND MAX WINDS INIT 01/2100Z 35.3N 71.5W 35 KT 40 MPH 12H 02/0600Z 36.1N 69.4W 35 KT 40 MPH 24H 02/1800Z 36.7N 66.7W 35 KT 40 MPH 36H 03/0600Z 37.2N 63.9W 30 KT 35 MPH 48H 03/1800Z 37.2N 61.1W 25 KT 30 MPH...POST-TROP/REMNT LOW 60H 04/0600Z 37.0N 59.2W 25 KT 30 MPH...POST-TROP/REMNT LOW 72H 04/1800Z 37.0N 57.4W 25 KT 30 MPH...POST-TROP/REMNT LOW 96H 05/1800Z 39.5N 53.0W 25 KT 30 MPH...POST-TROP/REMNT LOW 120H 06/1800Z...DISSIPATED $$ Forecaster Blake |
