WTNT80 EGRR 011606 MET OFFICE TROPICAL CYCLONE GUIDANCE FOR NORTH-EAST PACIFIC AND ATLANTIC GLOBAL MODEL DATA TIME 12UTC 01.09.2017 HURRICANE IRMA ANALYSED POSITION : 18.3N 37.3W ATCF IDENTIFIER : AL112017 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 01.09.2017 18.3N 37.3W STRONG 00UTC 02.09.2017 18.9N 39.7W STRONG WEAKENING SLIGHTLY 12UTC 02.09.2017 19.0N 42.4W STRONG INTENSIFYING SLIGHTLY 00UTC 03.09.2017 18.7N 45.0W STRONG INTENSIFYING SLIGHTLY 12UTC 03.09.2017 18.2N 47.4W INTENSE LITTLE CHANGE 00UTC 04.09.2017 17.5N 49.5W INTENSE INTENSIFYING SLIGHTLY 12UTC 04.09.2017 17.2N 51.4W INTENSE LITTLE CHANGE 00UTC 05.09.2017 17.4N 53.5W INTENSE INTENSIFYING SLIGHTLY 12UTC 05.09.2017 17.6N 55.5W INTENSE LITTLE CHANGE 00UTC 06.09.2017 18.7N 57.6W INTENSE LITTLE CHANGE 12UTC 06.09.2017 20.0N 60.0W INTENSE INTENSIFYING SLIGHTLY 00UTC 07.09.2017 21.4N 62.1W INTENSE LITTLE CHANGE 12UTC 07.09.2017 22.7N 64.5W INTENSE LITTLE CHANGE TROPICAL STORM LIDIA ANALYSED POSITION : 24.0N 110.6W ATCF IDENTIFIER : EP142017 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 01.09.2017 24.0N 110.6W MODERATE 00UTC 02.09.2017 26.0N 111.3W MODERATE LITTLE CHANGE 12UTC 02.09.2017 27.5N 112.0W MODERATE INTENSIFYING SLIGHTLY 00UTC 03.09.2017 29.2N 113.0W MODERATE LITTLE CHANGE 12UTC 03.09.2017 29.9N 114.4W MODERATE WEAKENING RAPIDLY 00UTC 04.09.2017 BELOW TROPICAL STORM STRENGTH NEW TROPICAL STORM FORECAST TO DEVELOP AFTER 12 HOURS FORECAST POSITION AT T+ 12 : 13.9N 130.8W VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 00UTC 02.09.2017 13.9N 130.8W WEAK 12UTC 02.09.2017 15.3N 129.3W WEAK LITTLE CHANGE 00UTC 03.09.2017 16.0N 128.2W WEAK LITTLE CHANGE 12UTC 03.09.2017 BELOW TROPICAL STORM STRENGTH NEW TROPICAL STORM FORECAST TO DEVELOP AFTER 72 HOURS FORECAST POSITION AT T+ 72 : 11.3N 31.7W VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 04.09.2017 11.3N 31.7W WEAK 00UTC 05.09.2017 12.3N 33.5W WEAK LITTLE CHANGE 12UTC 05.09.2017 12.9N 35.3W WEAK LITTLE CHANGE 00UTC 06.09.2017 13.9N 37.3W WEAK LITTLE CHANGE 12UTC 06.09.2017 14.9N 39.8W MODERATE INTENSIFYING SLIGHTLY 00UTC 07.09.2017 15.9N 42.4W MODERATE INTENSIFYING SLIGHTLY 12UTC 07.09.2017 16.7N 45.2W MODERATE LITTLE CHANGE NEW TROPICAL STORM FORECAST TO DEVELOP AFTER 144 HOURS FORECAST POSITION AT T+144 : 21.7N 94.7W VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 07.09.2017 21.7N 94.7W WEAK 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 011606