927 WTNT80 EGRR 161610 MET OFFICE TROPICAL CYCLONE GUIDANCE FOR NORTH-EAST PACIFIC AND ATLANTIC GLOBAL MODEL DATA TIME 12UTC 16.09.2023 HURRICANE LEE ANALYSED POSITION : 42.4N 66.0W ATCF IDENTIFIER : AL132023 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 16.09.2023 42.4N 66.0W STRONG 00UTC 17.09.2023 45.1N 65.6W MODERATE WEAKENING RAPIDLY 12UTC 17.09.2023 47.5N 62.6W MODERATE WEAKENING SLIGHTLY 00UTC 18.09.2023 50.0N 57.0W MODERATE WEAKENING SLIGHTLY 12UTC 18.09.2023 53.4N 45.5W MODERATE LITTLE CHANGE 00UTC 19.09.2023 54.7N 28.0W MODERATE INTENSIFYING SLIGHTLY 12UTC 19.09.2023 POST-TROPICAL TROPICAL DEPRESSION 12E ANALYSED POSITION : 14.1N 138.2W ATCF IDENTIFIER : EP122023 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 16.09.2023 14.1N 138.2W WEAK 00UTC 17.09.2023 13.4N 140.3W WEAK LITTLE CHANGE 12UTC 17.09.2023 13.2N 142.0W WEAK LITTLE CHANGE 00UTC 18.09.2023 BELOW TROPICAL STORM STRENGTH TROPICAL STORM MARGOT ANALYSED POSITION : 34.6N 38.5W ATCF IDENTIFIER : AL142023 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 16.09.2023 34.6N 38.5W MODERATE 00UTC 17.09.2023 34.2N 40.4W WEAK WEAKENING SLIGHTLY 12UTC 17.09.2023 34.2N 42.0W WEAK WEAKENING SLIGHTLY 00UTC 18.09.2023 35.2N 43.2W WEAK LITTLE CHANGE 12UTC 18.09.2023 36.6N 43.5W WEAK LITTLE CHANGE 00UTC 19.09.2023 38.1N 42.0W WEAK LITTLE CHANGE 12UTC 19.09.2023 38.5N 39.0W WEAK LITTLE CHANGE 00UTC 20.09.2023 38.0N 36.4W WEAK LITTLE CHANGE 12UTC 20.09.2023 37.2N 34.4W WEAK LITTLE CHANGE 00UTC 21.09.2023 36.8N 32.6W WEAK LITTLE CHANGE 12UTC 21.09.2023 37.8N 30.9W WEAK LITTLE CHANGE 00UTC 22.09.2023 39.1N 29.8W WEAK LITTLE CHANGE 12UTC 22.09.2023 BELOW TROPICAL STORM STRENGTH TROPICAL DEPRESSION 15L ANALYSED POSITION : 18.8N 46.0W ATCF IDENTIFIER : AL152023 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 16.09.2023 18.8N 46.0W WEAK 00UTC 17.09.2023 20.4N 47.2W WEAK LITTLE CHANGE 12UTC 17.09.2023 22.2N 49.4W WEAK LITTLE CHANGE 00UTC 18.09.2023 24.1N 49.9W WEAK LITTLE CHANGE 12UTC 18.09.2023 25.3N 51.1W WEAK LITTLE CHANGE 00UTC 19.09.2023 27.0N 52.5W WEAK LITTLE CHANGE 12UTC 19.09.2023 28.9N 54.4W WEAK LITTLE CHANGE 00UTC 20.09.2023 31.1N 55.8W WEAK LITTLE CHANGE 12UTC 20.09.2023 33.7N 56.0W MODERATE LITTLE CHANGE 00UTC 21.09.2023 36.5N 54.4W MODERATE LITTLE CHANGE 12UTC 21.09.2023 39.2N 50.3W MODERATE INTENSIFYING SLIGHTLY 00UTC 22.09.2023 42.1N 43.3W STRONG INTENSIFYING SLIGHTLY 12UTC 22.09.2023 46.4N 34.0W STRONG INTENSIFYING SLIGHTLY 00UTC 23.09.2023 52.1N 29.5W INTENSE INTENSIFYING RAPIDLY 12UTC 23.09.2023 POST-TROPICAL NEW TROPICAL STORM FORECAST TO DEVELOP AFTER 144 HOURS FORECAST POSITION AT T+144 : 32.3N 77.0W VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 22.09.2023 32.3N 77.0W WEAK 00UTC 23.09.2023 33.4N 76.6W WEAK LITTLE CHANGE 12UTC 23.09.2023 35.8N 77.1W WEAK LITTLE CHANGE THIS INFORMATION IS PROVIDED AS GUIDANCE FOR TROPICAL CYCLONE RSMCS. IT REQUIRES INTERPRETATION BY TROPICAL CYCLONE SPECIALISTS AND SHOULD NOT BE CONSIDERED AS A FINAL PRODUCT. BULLETINS ARE NOW AVAILABLE WHICH PROVIDE EXPLICIT GUIDANCE ON CENTRAL PRESSURE AND MAXIMUM WIND SPEED. FOR FURTHER INFORMATION CONTACT TROPICAL_CYCLONES@METOFFICE.GOV.UK MET OFFICE, EXETER, UK TOO 161610