ZCZC MIATCDAT1 ALL TTAA00 KNHC DDHHMM Tropical Storm Peter Special Discussion Number 3 NWS National Hurricane Center Miami FL AL162021 900 AM AST Sun Sep 19 2021 Satellite imagery as well as data from a Air Force Reserve Hurricane Hunter aircraft indicate that the center of Peter is over 100 n mi west-southwest of its forecast position. Therefore, a special advisory for track is being issued. The forecast track has been adjusted through the first 60 h, resulting in a slight southward adjustment of the track through the first couple of days. The aircraft also measured 925 mb flight-level winds of 56 kt, which supports an initial intensity of 40 kt. No adjustments were made to the intensity forecast. The next full advisory will be issued at 1500 UTC. Based on the track, intensity, and wind radii forecast, no tropical storm watches or warnings are required for the northern Leeward Islands, Virgin Islands or Puerto Rico. However, interests there should monitor the progress of the system as locally heavy rain is possible on Monday and Tuesday when it is expected to pass to the north of the area. Key Messages: 1. Rainfall around the southern periphery of Tropical Storm Peter may lead to areas of urban and small stream flooding from late Sunday into Tuesday across Puerto Rico, the Virgin Islands, and the Northern Leeward Islands. FORECAST POSITIONS AND MAX WINDS INIT 19/1300Z 17.6N 56.0W 40 KT 45 MPH 12H 19/1800Z 18.2N 57.0W 40 KT 45 MPH 24H 20/0600Z 19.3N 58.8W 40 KT 45 MPH 36H 20/1800Z 20.2N 61.1W 40 KT 45 MPH 48H 21/0600Z 21.3N 63.2W 35 KT 40 MPH 60H 21/1800Z 22.6N 65.0W 35 KT 40 MPH 72H 22/0600Z 24.3N 65.6W 35 KT 40 MPH 96H 23/0600Z 25.8N 65.6W 35 KT 40 MPH 120H 24/0600Z 27.7N 65.2W 35 KT 40 MPH $$ Forecaster Latto NNNN
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