000 WTNT80 EGRR 091612 MET OFFICE TROPICAL CYCLONE GUIDANCE FOR NORTH-EAST PACIFIC AND ATLANTIC GLOBAL MODEL DATA TIME 12UTC 09.09.2017 HURRICANE IRMA ANALYSED POSITION : 22.7N 79.3W ATCF IDENTIFIER : AL112017 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 09.09.2017 22.7N 79.3W INTENSE 00UTC 10.09.2017 23.2N 80.8W INTENSE WEAKENING SLIGHTLY 12UTC 10.09.2017 24.2N 81.5W INTENSE INTENSIFYING SLIGHTLY 00UTC 11.09.2017 26.0N 82.0W INTENSE INTENSIFYING RAPIDLY 12UTC 11.09.2017 28.6N 82.4W INTENSE WEAKENING RAPIDLY 00UTC 12.09.2017 31.7N 83.4W STRONG WEAKENING RAPIDLY 12UTC 12.09.2017 34.2N 85.1W MODERATE WEAKENING RAPIDLY 00UTC 13.09.2017 35.5N 87.8W MODERATE WEAKENING SLIGHTLY 12UTC 13.09.2017 35.0N 89.6W WEAK LITTLE CHANGE 00UTC 14.09.2017 BELOW TROPICAL STORM STRENGTH HURRICANE JOSE ANALYSED POSITION : 18.0N 60.5W ATCF IDENTIFIER : AL122017 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 09.09.2017 18.0N 60.5W STRONG 00UTC 10.09.2017 19.6N 62.9W STRONG WEAKENING SLIGHTLY 12UTC 10.09.2017 21.3N 65.4W MODERATE LITTLE CHANGE 00UTC 11.09.2017 23.2N 67.6W MODERATE LITTLE CHANGE 12UTC 11.09.2017 25.0N 69.3W MODERATE LITTLE CHANGE 00UTC 12.09.2017 26.5N 69.9W STRONG INTENSIFYING SLIGHTLY 12UTC 12.09.2017 27.0N 69.3W STRONG LITTLE CHANGE 00UTC 13.09.2017 26.8N 67.8W STRONG INTENSIFYING SLIGHTLY 12UTC 13.09.2017 25.8N 66.6W INTENSE INTENSIFYING RAPIDLY 00UTC 14.09.2017 24.7N 66.6W INTENSE LITTLE CHANGE 12UTC 14.09.2017 23.6N 67.8W INTENSE INTENSIFYING SLIGHTLY 00UTC 15.09.2017 23.2N 69.7W INTENSE LITTLE CHANGE 12UTC 15.09.2017 23.3N 72.0W INTENSE INTENSIFYING SLIGHTLY TROPICAL DEPRESSION KATIA ANALYSED POSITION : 18.1N 99.7W ATCF IDENTIFIER : AL132017 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 09.09.2017 18.1N 99.7W WEAK 00UTC 10.09.2017 BELOW TROPICAL STORM STRENGTH NEW TROPICAL STORM FORECAST TO DEVELOP AFTER 72 HOURS FORECAST POSITION AT T+ 72 : 18.3N 38.2W VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 12.09.2017 18.3N 38.2W WEAK 00UTC 13.09.2017 21.7N 38.6W WEAK LITTLE CHANGE 12UTC 13.09.2017 24.7N 38.2W WEAK LITTLE CHANGE 00UTC 14.09.2017 27.8N 37.7W WEAK LITTLE CHANGE 12UTC 14.09.2017 30.5N 37.8W MODERATE INTENSIFYING SLIGHTLY 00UTC 15.09.2017 32.2N 38.0W MODERATE LITTLE CHANGE 12UTC 15.09.2017 33.8N 38.5W MODERATE INTENSIFYING SLIGHTLY NEW TROPICAL STORM FORECAST TO DEVELOP AFTER 84 HOURS FORECAST POSITION AT T+ 84 : 12.7N 126.0W VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 00UTC 13.09.2017 12.7N 126.0W WEAK 12UTC 13.09.2017 12.7N 125.6W WEAK LITTLE CHANGE 00UTC 14.09.2017 12.9N 124.3W WEAK LITTLE CHANGE 12UTC 14.09.2017 13.2N 123.1W WEAK LITTLE CHANGE 00UTC 15.09.2017 BELOW TROPICAL STORM STRENGTH NEW TROPICAL STORM FORECAST TO DEVELOP AFTER 84 HOURS FORECAST POSITION AT T+ 84 : 14.4N 102.2W VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 00UTC 13.09.2017 14.4N 102.2W WEAK 12UTC 13.09.2017 15.8N 103.4W WEAK LITTLE CHANGE 00UTC 14.09.2017 16.7N 104.8W WEAK LITTLE CHANGE 12UTC 14.09.2017 17.5N 105.7W MODERATE INTENSIFYING SLIGHTLY 00UTC 15.09.2017 17.5N 104.7W MODERATE INTENSIFYING SLIGHTLY 12UTC 15.09.2017 17.7N 103.7W MODERATE LITTLE CHANGE NEW TROPICAL STORM FORECAST TO DEVELOP AFTER 96 HOURS FORECAST POSITION AT T+ 96 : 14.3N 116.5W VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 13.09.2017 14.3N 116.5W WEAK 00UTC 14.09.2017 15.9N 116.7W WEAK LITTLE CHANGE 12UTC 14.09.2017 17.2N 117.4W WEAK LITTLE CHANGE 00UTC 15.09.2017 18.3N 118.9W WEAK LITTLE CHANGE 12UTC 15.09.2017 19.1N 118.6W WEAK LITTLE CHANGE NEW TROPICAL STORM FORECAST TO DEVELOP AFTER 114 HOURS FORECAST POSITION AT T+114 : 10.8N 27.2W VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 14.09.2017 10.9N 29.1W WEAK LITTLE CHANGE 00UTC 15.09.2017 12.1N 32.6W WEAK LITTLE CHANGE 12UTC 15.09.2017 13.2N 36.4W MODERATE INTENSIFYING SLIGHTLY 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 091612