361 WTNT80 EGRR 061604 MET OFFICE TROPICAL CYCLONE GUIDANCE FOR NORTH-EAST PACIFIC AND ATLANTIC GLOBAL MODEL DATA TIME 12UTC 06.08.2018 HURRICANE HECTOR ANALYSED POSITION : 15.0N 141.2W ATCF IDENTIFIER : EP102018 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 06.08.2018 15.0N 141.2W INTENSE 00UTC 07.08.2018 15.8N 144.2W STRONG WEAKENING RAPIDLY 12UTC 07.08.2018 16.2N 147.2W MODERATE WEAKENING RAPIDLY 00UTC 08.08.2018 16.4N 150.5W STRONG LITTLE CHANGE 12UTC 08.08.2018 16.2N 153.5W MODERATE LITTLE CHANGE 00UTC 09.08.2018 16.2N 156.8W STRONG INTENSIFYING SLIGHTLY 12UTC 09.08.2018 16.1N 160.3W MODERATE LITTLE CHANGE 00UTC 10.08.2018 16.0N 163.6W MODERATE LITTLE CHANGE 12UTC 10.08.2018 15.9N 166.9W MODERATE WEAKENING SLIGHTLY 00UTC 11.08.2018 15.9N 169.7W MODERATE LITTLE CHANGE 12UTC 11.08.2018 16.2N 171.8W MODERATE LITTLE CHANGE 00UTC 12.08.2018 17.0N 173.6W MODERATE LITTLE CHANGE 12UTC 12.08.2018 17.9N 175.5W MODERATE WEAKENING SLIGHTLY TROPICAL STORM ILEANA ANALYSED POSITION : 15.6N 101.7W ATCF IDENTIFIER : EP112018 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 06.08.2018 15.6N 101.7W MODERATE 00UTC 07.08.2018 18.1N 105.0W STRONG INTENSIFYING SLIGHTLY 12UTC 07.08.2018 20.8N 109.3W MODERATE WEAKENING RAPIDLY 00UTC 08.08.2018 22.7N 113.3W MODERATE WEAKENING SLIGHTLY 12UTC 08.08.2018 23.5N 116.9W WEAK LITTLE CHANGE 00UTC 09.08.2018 24.0N 120.5W WEAK LITTLE CHANGE 12UTC 09.08.2018 BELOW TROPICAL STORM STRENGTH TROPICAL STORM JOHN ANALYSED POSITION : 15.2N 107.6W ATCF IDENTIFIER : EP122018 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 06.08.2018 15.2N 107.6W MODERATE 00UTC 07.08.2018 15.6N 108.9W MODERATE INTENSIFYING SLIGHTLY 12UTC 07.08.2018 16.4N 109.7W STRONG LITTLE CHANGE 00UTC 08.08.2018 17.7N 110.8W STRONG LITTLE CHANGE 12UTC 08.08.2018 19.4N 112.3W MODERATE LITTLE CHANGE 00UTC 09.08.2018 21.5N 114.4W STRONG INTENSIFYING SLIGHTLY 12UTC 09.08.2018 23.4N 117.3W STRONG LITTLE CHANGE 00UTC 10.08.2018 25.1N 119.7W MODERATE WEAKENING RAPIDLY 12UTC 10.08.2018 26.3N 121.5W MODERATE WEAKENING RAPIDLY 00UTC 11.08.2018 27.8N 123.1W WEAK WEAKENING SLIGHTLY 12UTC 11.08.2018 28.0N 125.0W WEAK LITTLE CHANGE 00UTC 12.08.2018 27.9N 126.6W WEAK LITTLE CHANGE 12UTC 12.08.2018 27.7N 128.0W WEAK LITTLE CHANGE TROPICAL STORM DEVELOPED IN THE MODEL ANALYSIS AT POSITION : 32.0N 49.5W VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 06.08.2018 32.0N 49.5W WEAK 00UTC 07.08.2018 33.9N 48.5W WEAK LITTLE CHANGE 12UTC 07.08.2018 37.2N 47.6W WEAK LITTLE CHANGE 00UTC 08.08.2018 40.0N 48.3W WEAK LITTLE CHANGE 12UTC 08.08.2018 41.6N 48.0W WEAK LITTLE CHANGE 00UTC 09.08.2018 43.1N 46.0W WEAK LITTLE CHANGE 12UTC 09.08.2018 BELOW TROPICAL STORM STRENGTH NEW TROPICAL STORM FORECAST TO DEVELOP AFTER 24 HOURS FORECAST POSITION AT T+ 24 : 9.4N 154.7W VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 07.08.2018 9.4N 154.7W WEAK 00UTC 08.08.2018 9.7N 155.4W WEAK LITTLE CHANGE 12UTC 08.08.2018 10.0N 155.6W WEAK LITTLE CHANGE 00UTC 09.08.2018 11.3N 155.0W WEAK LITTLE CHANGE 12UTC 09.08.2018 13.6N 155.4W MODERATE LITTLE CHANGE 00UTC 10.08.2018 15.8N 157.9W MODERATE LITTLE CHANGE 12UTC 10.08.2018 17.5N 161.8W WEAK LITTLE CHANGE 00UTC 11.08.2018 19.2N 166.6W WEAK LITTLE CHANGE 12UTC 11.08.2018 BELOW TROPICAL STORM STRENGTH 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 061604