000 WTNT80 EGRR 310418 MET OFFICE TROPICAL CYCLONE GUIDANCE FOR NORTH-EAST PACIFIC AND ATLANTIC GLOBAL MODEL DATA TIME 00UTC 31.08.2017 TROPICAL DEPRESSION HARVEY ANALYSED POSITION : 31.4N 92.5W ATCF IDENTIFIER : AL092017 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 00UTC 31.08.2017 31.4N 92.5W MODERATE 12UTC 31.08.2017 32.5N 91.5W MODERATE LITTLE CHANGE 00UTC 01.09.2017 34.4N 89.6W MODERATE LITTLE CHANGE 12UTC 01.09.2017 36.2N 86.5W MODERATE LITTLE CHANGE 00UTC 02.09.2017 36.6N 84.8W WEAK LITTLE CHANGE 12UTC 02.09.2017 37.2N 84.0W WEAK WEAKENING SLIGHTLY 00UTC 03.09.2017 BELOW TROPICAL STORM STRENGTH TROPICAL STORM IRMA ANALYSED POSITION : 16.4N 32.1W ATCF IDENTIFIER : AL112017 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 00UTC 31.08.2017 16.4N 32.1W WEAK 12UTC 31.08.2017 16.7N 33.7W MODERATE LITTLE CHANGE 00UTC 01.09.2017 17.5N 35.4W MODERATE LITTLE CHANGE 12UTC 01.09.2017 18.2N 37.1W MODERATE LITTLE CHANGE 00UTC 02.09.2017 19.0N 39.2W MODERATE LITTLE CHANGE 12UTC 02.09.2017 19.4N 41.7W MODERATE LITTLE CHANGE 00UTC 03.09.2017 18.9N 44.1W MODERATE LITTLE CHANGE 12UTC 03.09.2017 18.3N 46.1W MODERATE LITTLE CHANGE 00UTC 04.09.2017 17.8N 48.0W STRONG INTENSIFYING SLIGHTLY 12UTC 04.09.2017 17.5N 50.1W STRONG LITTLE CHANGE 00UTC 05.09.2017 17.5N 52.5W STRONG INTENSIFYING SLIGHTLY 12UTC 05.09.2017 17.5N 54.8W INTENSE INTENSIFYING SLIGHTLY 00UTC 06.09.2017 18.1N 56.9W INTENSE INTENSIFYING SLIGHTLY TROPICAL STORM LIDIA ANALYSED POSITION : 20.5N 109.7W ATCF IDENTIFIER : EP142017 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 00UTC 31.08.2017 20.5N 109.7W MODERATE 12UTC 31.08.2017 21.7N 110.2W MODERATE INTENSIFYING SLIGHTLY 00UTC 01.09.2017 23.2N 110.8W MODERATE INTENSIFYING SLIGHTLY 12UTC 01.09.2017 24.3N 112.0W MODERATE LITTLE CHANGE 00UTC 02.09.2017 26.1N 113.0W MODERATE LITTLE CHANGE 12UTC 02.09.2017 28.0N 114.1W MODERATE WEAKENING SLIGHTLY 00UTC 03.09.2017 29.1N 115.7W WEAK WEAKENING SLIGHTLY 12UTC 03.09.2017 30.8N 118.1W WEAK WEAKENING SLIGHTLY 00UTC 04.09.2017 BELOW TROPICAL STORM STRENGTH NEW TROPICAL STORM FORECAST TO DEVELOP AFTER 18 HOURS FORECAST POSITION AT T+ 18 : 13.0N 133.1W VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 00UTC 01.09.2017 13.2N 132.7W WEAK WEAKENING RAPIDLY 12UTC 01.09.2017 13.5N 131.8W WEAK LITTLE CHANGE 00UTC 02.09.2017 14.1N 130.7W WEAK LITTLE CHANGE 12UTC 02.09.2017 14.8N 129.2W WEAK LITTLE CHANGE 00UTC 03.09.2017 15.6N 127.9W WEAK LITTLE CHANGE 12UTC 03.09.2017 BELOW TROPICAL STORM STRENGTH NEW TROPICAL STORM FORECAST TO DEVELOP AFTER 132 HOURS FORECAST POSITION AT T+132 : 11.3N 128.4W VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 05.09.2017 11.3N 128.4W WEAK 00UTC 06.09.2017 12.0N 128.3W WEAK LITTLE CHANGE NEW TROPICAL STORM FORECAST TO DEVELOP AFTER 132 HOURS FORECAST POSITION AT T+132 : 11.7N 139.2W VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 05.09.2017 11.7N 139.2W WEAK 00UTC 06.09.2017 10.6N 139.5W 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 310418