650 WTNT80 EGRR 211612 MET OFFICE TROPICAL CYCLONE GUIDANCE FOR NORTH-EAST PACIFIC AND ATLANTIC GLOBAL MODEL DATA TIME 12UTC 21.09.2023 HURRICANE NIGEL ANALYSED POSITION : 41.1N 46.5W ATCF IDENTIFIER : AL152023 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 21.09.2023 41.1N 46.5W STRONG 00UTC 22.09.2023 44.0N 39.0W STRONG WEAKENING SLIGHTLY 12UTC 22.09.2023 47.0N 30.5W MODERATE WEAKENING SLIGHTLY 00UTC 23.09.2023 50.6N 24.1W MODERATE LITTLE CHANGE 12UTC 23.09.2023 POST-TROPICAL TROPICAL STORM KENNETH ANALYSED POSITION : 16.7N 125.9W ATCF IDENTIFIER : EP132023 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 21.09.2023 16.7N 125.9W WEAK 00UTC 22.09.2023 17.9N 126.5W WEAK LITTLE CHANGE 12UTC 22.09.2023 19.5N 126.6W WEAK LITTLE CHANGE 00UTC 23.09.2023 BELOW TROPICAL STORM STRENGTH TROPICAL DEPRESSION 99L ANALYSED POSITION : 28.5N 75.0W ATCF IDENTIFIER : AL992023 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 21.09.2023 28.5N 75.0W WEAK 00UTC 22.09.2023 30.6N 74.8W WEAK INTENSIFYING SLIGHTLY 12UTC 22.09.2023 31.6N 75.4W WEAK INTENSIFYING SLIGHTLY 00UTC 23.09.2023 32.8N 76.1W MODERATE INTENSIFYING SLIGHTLY 12UTC 23.09.2023 35.5N 76.4W MODERATE LITTLE CHANGE 00UTC 24.09.2023 37.0N 77.2W WEAK WEAKENING SLIGHTLY 12UTC 24.09.2023 37.2N 78.4W WEAK WEAKENING SLIGHTLY 00UTC 25.09.2023 BELOW TROPICAL STORM STRENGTH TROPICAL DEPRESSION 91C ANALYSED POSITION : 12.9N 141.1W ATCF IDENTIFIER : CP912023 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 21.09.2023 12.9N 141.1W WEAK 00UTC 22.09.2023 BELOW TROPICAL STORM STRENGTH NEW TROPICAL STORM FORECAST TO DEVELOP AFTER 48 HOURS FORECAST POSITION AT T+ 48 : 15.8N 39.4W VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 23.09.2023 15.8N 39.4W WEAK 00UTC 24.09.2023 16.0N 42.4W WEAK LITTLE CHANGE 12UTC 24.09.2023 16.6N 45.3W WEAK LITTLE CHANGE 00UTC 25.09.2023 17.0N 48.5W WEAK LITTLE CHANGE 12UTC 25.09.2023 17.4N 51.1W WEAK LITTLE CHANGE 00UTC 26.09.2023 17.1N 53.9W WEAK LITTLE CHANGE 12UTC 26.09.2023 16.7N 55.5W WEAK LITTLE CHANGE 00UTC 27.09.2023 16.5N 57.4W WEAK LITTLE CHANGE 12UTC 27.09.2023 16.3N 58.1W WEAK LITTLE CHANGE 00UTC 28.09.2023 17.0N 59.0W WEAK LITTLE CHANGE 12UTC 28.09.2023 17.8N 58.6W WEAK LITTLE CHANGE NEW TROPICAL STORM FORECAST TO DEVELOP AFTER 114 HOURS FORECAST POSITION AT T+114 : 38.2N 19.3E VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 26.09.2023 37.0N 20.4E WEAK LITTLE CHANGE 00UTC 27.09.2023 35.3N 21.6E WEAK LITTLE CHANGE 12UTC 27.09.2023 34.2N 23.6E WEAK LITTLE CHANGE 00UTC 28.09.2023 33.9N 25.1E WEAK LITTLE CHANGE 12UTC 28.09.2023 BELOW TROPICAL STORM STRENGTH NEW TROPICAL STORM FORECAST TO DEVELOP AFTER 162 HOURS FORECAST POSITION AT T+162 : 19.2N 44.0W VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 28.09.2023 20.4N 45.0W WEAK WEAKENING SLIGHTLY 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 211612