977 WTNT80 EGRR 300410 MET OFFICE TROPICAL CYCLONE GUIDANCE FOR NORTH-EAST PACIFIC AND ATLANTIC GLOBAL MODEL DATA TIME 00UTC 30.08.2023 TROPICAL DEPRESSION 90C ANALYSED POSITION : 7.2N 152.9W ATCF IDENTIFIER : CP902023 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 00UTC 30.08.2023 7.2N 152.9W WEAK 12UTC 30.08.2023 6.4N 155.2W WEAK LITTLE CHANGE 00UTC 31.08.2023 5.8N 157.0W WEAK LITTLE CHANGE 12UTC 31.08.2023 6.0N 158.5W WEAK LITTLE CHANGE 00UTC 01.09.2023 7.2N 159.9W WEAK LITTLE CHANGE 12UTC 01.09.2023 9.0N 161.6W WEAK LITTLE CHANGE 00UTC 02.09.2023 10.1N 162.8W WEAK LITTLE CHANGE 12UTC 02.09.2023 BELOW TROPICAL STORM STRENGTH TROPICAL STORM IRWIN ANALYSED POSITION : 18.9N 131.0W ATCF IDENTIFIER : EP102023 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 00UTC 30.08.2023 18.9N 131.0W WEAK 12UTC 30.08.2023 18.9N 133.6W WEAK LITTLE CHANGE 00UTC 31.08.2023 18.9N 135.3W WEAK LITTLE CHANGE 12UTC 31.08.2023 19.0N 136.9W WEAK LITTLE CHANGE 00UTC 01.09.2023 18.9N 138.3W WEAK LITTLE CHANGE 12UTC 01.09.2023 18.5N 139.0W WEAK LITTLE CHANGE 00UTC 02.09.2023 18.0N 139.6W WEAK LITTLE CHANGE 12UTC 02.09.2023 BELOW TROPICAL STORM STRENGTH HURRICANE IDALIA ANALYSED POSITION : 27.2N 84.8W ATCF IDENTIFIER : AL102023 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 00UTC 30.08.2023 27.2N 84.8W STRONG 12UTC 30.08.2023 29.5N 83.9W STRONG LITTLE CHANGE 00UTC 31.08.2023 32.1N 81.6W MODERATE WEAKENING RAPIDLY 12UTC 31.08.2023 33.3N 78.5W MODERATE WEAKENING SLIGHTLY 00UTC 01.09.2023 33.6N 75.0W MODERATE LITTLE CHANGE 12UTC 01.09.2023 32.2N 72.0W WEAK WEAKENING SLIGHTLY 00UTC 02.09.2023 31.2N 69.4W WEAK LITTLE CHANGE 12UTC 02.09.2023 30.3N 67.8W WEAK LITTLE CHANGE 00UTC 03.09.2023 29.7N 66.4W WEAK LITTLE CHANGE 12UTC 03.09.2023 30.2N 64.9W WEAK LITTLE CHANGE 00UTC 04.09.2023 30.3N 63.7W WEAK LITTLE CHANGE 12UTC 04.09.2023 31.1N 61.0W WEAK LITTLE CHANGE 00UTC 05.09.2023 33.1N 59.1W WEAK LITTLE CHANGE 12UTC 05.09.2023 34.0N 58.6W WEAK LITTLE CHANGE 00UTC 06.09.2023 34.5N 58.3W WEAK LITTLE CHANGE TROPICAL DEPRESSION 11L ANALYSED POSITION : 27.8N 52.2W ATCF IDENTIFIER : AL112023 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 00UTC 30.08.2023 27.8N 52.2W WEAK 12UTC 30.08.2023 28.0N 52.2W WEAK LITTLE CHANGE 00UTC 31.08.2023 28.0N 52.2W WEAK LITTLE CHANGE 12UTC 31.08.2023 28.7N 52.3W WEAK LITTLE CHANGE 00UTC 01.09.2023 BELOW TROPICAL STORM STRENGTH HURRICANE FRANKLIN ANALYSED POSITION : 31.8N 69.6W ATCF IDENTIFIER : AL082023 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 00UTC 30.08.2023 31.8N 69.6W INTENSE 12UTC 30.08.2023 33.0N 67.9W INTENSE LITTLE CHANGE 00UTC 31.08.2023 34.1N 65.4W INTENSE LITTLE CHANGE 12UTC 31.08.2023 34.6N 63.0W STRONG WEAKENING SLIGHTLY 00UTC 01.09.2023 35.2N 60.5W STRONG WEAKENING RAPIDLY 12UTC 01.09.2023 35.5N 57.9W MODERATE WEAKENING SLIGHTLY 00UTC 02.09.2023 35.8N 55.7W MODERATE LITTLE CHANGE 12UTC 02.09.2023 36.7N 53.5W STRONG INTENSIFYING SLIGHTLY 00UTC 03.09.2023 39.3N 51.3W STRONG INTENSIFYING SLIGHTLY 12UTC 03.09.2023 42.2N 50.4W STRONG INTENSIFYING SLIGHTLY 00UTC 04.09.2023 45.3N 47.3W STRONG WEAKENING SLIGHTLY 12UTC 04.09.2023 49.6N 42.4W STRONG WEAKENING SLIGHTLY 00UTC 05.09.2023 53.3N 36.8W MODERATE LITTLE CHANGE 12UTC 05.09.2023 POST-TROPICAL NEW TROPICAL STORM FORECAST TO DEVELOP AFTER 54 HOURS FORECAST POSITION AT T+ 54 : 19.0N 27.2W VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 01.09.2023 20.1N 27.8W WEAK LITTLE CHANGE 00UTC 02.09.2023 22.6N 28.5W WEAK LITTLE CHANGE 12UTC 02.09.2023 23.8N 29.6W WEAK LITTLE CHANGE 00UTC 03.09.2023 25.3N 31.2W WEAK LITTLE CHANGE 12UTC 03.09.2023 26.6N 33.3W WEAK LITTLE CHANGE 00UTC 04.09.2023 28.8N 35.7W WEAK LITTLE CHANGE 12UTC 04.09.2023 31.1N 37.7W WEAK LITTLE CHANGE 00UTC 05.09.2023 32.5N 40.5W WEAK LITTLE CHANGE 12UTC 05.09.2023 33.0N 43.4W WEAK LITTLE CHANGE 00UTC 06.09.2023 34.5N 45.0W WEAK LITTLE CHANGE NEW TROPICAL STORM FORECAST TO DEVELOP AFTER 78 HOURS FORECAST POSITION AT T+ 78 : 9.7N 15.4W VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 02.09.2023 10.3N 17.7W WEAK LITTLE CHANGE 00UTC 03.09.2023 10.9N 19.0W WEAK LITTLE CHANGE 12UTC 03.09.2023 12.1N 22.9W WEAK LITTLE CHANGE 00UTC 04.09.2023 11.6N 26.7W WEAK LITTLE CHANGE 12UTC 04.09.2023 11.7N 30.9W WEAK LITTLE CHANGE 00UTC 05.09.2023 11.7N 34.9W WEAK LITTLE CHANGE 12UTC 05.09.2023 12.2N 38.1W WEAK LITTLE CHANGE 00UTC 06.09.2023 12.9N 40.7W MODERATE 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 300410