073 WTNT80 EGRR 280410 MET OFFICE TROPICAL CYCLONE GUIDANCE FOR NORTH-EAST PACIFIC AND ATLANTIC GLOBAL MODEL DATA TIME 00UTC 28.08.2023 TROPICAL STORM IRWIN ANALYSED POSITION : 17.2N 121.9W ATCF IDENTIFIER : EP102023 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 00UTC 28.08.2023 17.2N 121.9W MODERATE 12UTC 28.08.2023 18.1N 123.1W WEAK LITTLE CHANGE 00UTC 29.08.2023 18.9N 125.4W WEAK LITTLE CHANGE 12UTC 29.08.2023 19.2N 128.4W WEAK LITTLE CHANGE 00UTC 30.08.2023 18.5N 131.5W WEAK LITTLE CHANGE 12UTC 30.08.2023 18.6N 133.6W WEAK LITTLE CHANGE 00UTC 31.08.2023 19.1N 135.7W WEAK LITTLE CHANGE 12UTC 31.08.2023 19.5N 137.4W WEAK LITTLE CHANGE 00UTC 01.09.2023 20.0N 138.8W WEAK LITTLE CHANGE 12UTC 01.09.2023 19.9N 140.2W WEAK LITTLE CHANGE 00UTC 02.09.2023 19.5N 141.3W WEAK LITTLE CHANGE 12UTC 02.09.2023 19.2N 142.5W WEAK LITTLE CHANGE 00UTC 03.09.2023 BELOW TROPICAL STORM STRENGTH HURRICANE FRANKLIN ANALYSED POSITION : 26.0N 70.4W ATCF IDENTIFIER : AL082023 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 00UTC 28.08.2023 26.0N 70.4W STRONG 12UTC 28.08.2023 27.5N 71.2W STRONG INTENSIFYING SLIGHTLY 00UTC 29.08.2023 28.9N 71.5W STRONG INTENSIFYING SLIGHTLY 12UTC 29.08.2023 30.6N 71.0W STRONG LITTLE CHANGE 00UTC 30.08.2023 32.5N 69.6W INTENSE LITTLE CHANGE 12UTC 30.08.2023 34.8N 67.5W INTENSE LITTLE CHANGE 00UTC 31.08.2023 37.3N 64.0W INTENSE LITTLE CHANGE 12UTC 31.08.2023 41.5N 57.9W INTENSE LITTLE CHANGE 00UTC 01.09.2023 50.5N 49.5W INTENSE LITTLE CHANGE 12UTC 01.09.2023 POST-TROPICAL TROPICAL STORM IDALIA ANALYSED POSITION : 19.8N 85.5W ATCF IDENTIFIER : AL102023 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 00UTC 28.08.2023 19.8N 85.5W MODERATE 12UTC 28.08.2023 20.8N 84.8W MODERATE LITTLE CHANGE 00UTC 29.08.2023 22.2N 85.5W MODERATE LITTLE CHANGE 12UTC 29.08.2023 23.6N 85.1W MODERATE LITTLE CHANGE 00UTC 30.08.2023 25.7N 85.1W MODERATE LITTLE CHANGE 12UTC 30.08.2023 28.6N 83.9W MODERATE INTENSIFYING SLIGHTLY 00UTC 31.08.2023 31.4N 81.8W MODERATE LITTLE CHANGE 12UTC 31.08.2023 33.3N 78.1W MODERATE LITTLE CHANGE 00UTC 01.09.2023 34.0N 73.6W MODERATE LITTLE CHANGE 12UTC 01.09.2023 34.8N 70.3W MODERATE LITTLE CHANGE 00UTC 02.09.2023 35.5N 67.8W MODERATE LITTLE CHANGE 12UTC 02.09.2023 36.3N 65.8W MODERATE LITTLE CHANGE 00UTC 03.09.2023 37.2N 63.7W MODERATE INTENSIFYING SLIGHTLY 12UTC 03.09.2023 39.5N 60.7W STRONG INTENSIFYING SLIGHTLY 00UTC 04.09.2023 41.4N 57.5W STRONG LITTLE CHANGE NEW TROPICAL STORM FORECAST TO DEVELOP AFTER 18 HOURS FORECAST POSITION AT T+ 18 : 8.7N 150.0W VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 00UTC 29.08.2023 8.7N 151.0W WEAK WEAKENING SLIGHTLY 12UTC 29.08.2023 8.4N 152.9W WEAK LITTLE CHANGE 00UTC 30.08.2023 7.5N 155.3W WEAK LITTLE CHANGE 12UTC 30.08.2023 6.7N 157.5W WEAK LITTLE CHANGE 00UTC 31.08.2023 6.0N 159.9W WEAK LITTLE CHANGE 12UTC 31.08.2023 6.0N 162.2W WEAK LITTLE CHANGE 00UTC 01.09.2023 6.7N 164.7W WEAK LITTLE CHANGE 12UTC 01.09.2023 7.6N 166.7W WEAK LITTLE CHANGE 00UTC 02.09.2023 9.1N 168.8W WEAK LITTLE CHANGE 12UTC 02.09.2023 10.7N 170.7W WEAK LITTLE CHANGE 00UTC 03.09.2023 11.7N 172.7W WEAK LITTLE CHANGE 12UTC 03.09.2023 12.2N 174.9W WEAK LITTLE CHANGE 00UTC 04.09.2023 BELOW TROPICAL STORM STRENGTH NEW TROPICAL STORM FORECAST TO DEVELOP AFTER 108 HOURS FORECAST POSITION AT T+108 : 28.6N 88.4W VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 01.09.2023 28.6N 88.4W WEAK 00UTC 02.09.2023 30.3N 87.2W WEAK LITTLE CHANGE 12UTC 02.09.2023 31.7N 85.6W WEAK LITTLE CHANGE 00UTC 03.09.2023 30.7N 83.3W WEAK LITTLE CHANGE 12UTC 03.09.2023 BELOW TROPICAL STORM STRENGTH NEW TROPICAL STORM FORECAST TO DEVELOP AFTER 168 HOURS FORECAST POSITION AT T+168 : 40.1N 4.3E VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 00UTC 04.09.2023 40.1N 4.3E MODERATE 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 280410