201 WTNT80 EGRR 081604 MET OFFICE TROPICAL CYCLONE GUIDANCE FOR NORTH-EAST PACIFIC AND ATLANTIC GLOBAL MODEL DATA TIME 12UTC 08.09.2021 TROPICAL DEPRESSION 91L ANALYSED POSITION : 27.8N 89.0W ATCF IDENTIFIER : AL912021 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 08.09.2021 27.8N 89.0W WEAK 00UTC 09.09.2021 BELOW TROPICAL STORM STRENGTH HURRICANE LARRY ANALYSED POSITION : 27.2N 57.9W ATCF IDENTIFIER : AL122021 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 08.09.2021 27.2N 57.9W STRONG 00UTC 09.09.2021 29.2N 59.8W STRONG LITTLE CHANGE 12UTC 09.09.2021 31.7N 61.6W INTENSE INTENSIFYING SLIGHTLY 00UTC 10.09.2021 34.9N 62.3W INTENSE INTENSIFYING SLIGHTLY 12UTC 10.09.2021 39.2N 61.1W INTENSE LITTLE CHANGE 00UTC 11.09.2021 45.0N 56.2W INTENSE LITTLE CHANGE 12UTC 11.09.2021 51.4N 47.6W STRONG WEAKENING RAPIDLY 00UTC 12.09.2021 POST-TROPICAL TROPICAL STORM OLAF ANALYSED POSITION : 18.4N 107.3W ATCF IDENTIFIER : EP152021 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 08.09.2021 18.4N 107.3W WEAK 00UTC 09.09.2021 19.5N 108.0W WEAK LITTLE CHANGE 12UTC 09.09.2021 20.7N 108.8W WEAK LITTLE CHANGE 00UTC 10.09.2021 21.7N 110.0W MODERATE LITTLE CHANGE 12UTC 10.09.2021 22.7N 112.1W WEAK LITTLE CHANGE 00UTC 11.09.2021 23.1N 114.2W WEAK LITTLE CHANGE 12UTC 11.09.2021 23.1N 115.7W WEAK LITTLE CHANGE 00UTC 12.09.2021 22.5N 116.9W WEAK LITTLE CHANGE 12UTC 12.09.2021 21.8N 117.7W WEAK LITTLE CHANGE 00UTC 13.09.2021 BELOW TROPICAL STORM STRENGTH NEW TROPICAL STORM FORECAST TO DEVELOP AFTER 72 HOURS FORECAST POSITION AT T+ 72 : 15.5N 17.9W VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 11.09.2021 15.5N 17.9W WEAK 00UTC 12.09.2021 16.3N 20.6W WEAK LITTLE CHANGE 12UTC 12.09.2021 16.8N 23.2W WEAK LITTLE CHANGE 00UTC 13.09.2021 18.0N 24.7W WEAK LITTLE CHANGE 12UTC 13.09.2021 19.1N 25.7W WEAK LITTLE CHANGE 00UTC 14.09.2021 20.8N 25.8W WEAK LITTLE CHANGE 12UTC 14.09.2021 22.5N 26.0W 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 081603