408 WTNT80 EGRR 170400 MET OFFICE TROPICAL CYCLONE GUIDANCE FOR NORTH-EAST PACIFIC AND ATLANTIC GLOBAL MODEL DATA TIME 00UTC 17.09.2018 TROPICAL DEPRESSION FLORENCE ANALYSED POSITION : 34.8N 82.3W ATCF IDENTIFIER : AL062018 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 00UTC 17.09.2018 34.8N 82.3W WEAK 12UTC 17.09.2018 38.0N 82.8W WEAK LITTLE CHANGE 00UTC 18.09.2018 BELOW TROPICAL STORM STRENGTH TROPICAL DEPRESSION ISAAC ANALYSED POSITION : 17.1N 75.7W ATCF IDENTIFIER : AL092018 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 00UTC 17.09.2018 17.1N 75.7W WEAK 12UTC 17.09.2018 BELOW TROPICAL STORM STRENGTH TROPICAL DEPRESSION JOYCE ANALYSED POSITION : 34.1N 31.2W ATCF IDENTIFIER : AL102018 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 00UTC 17.09.2018 34.1N 31.2W WEAK 12UTC 17.09.2018 33.8N 28.3W WEAK LITTLE CHANGE 00UTC 18.09.2018 33.2N 26.4W WEAK LITTLE CHANGE 12UTC 18.09.2018 32.0N 25.8W WEAK LITTLE CHANGE 00UTC 19.09.2018 30.9N 26.6W WEAK LITTLE CHANGE 12UTC 19.09.2018 30.0N 27.9W WEAK LITTLE CHANGE 00UTC 20.09.2018 29.3N 29.3W WEAK LITTLE CHANGE 12UTC 20.09.2018 29.2N 31.6W WEAK LITTLE CHANGE 00UTC 21.09.2018 29.7N 33.0W WEAK LITTLE CHANGE 12UTC 21.09.2018 BELOW TROPICAL STORM STRENGTH TROPICAL DEPRESSION OLIVIA ANALYSED POSITION : 22.7N 174.8W ATCF IDENTIFIER : EP172018 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 00UTC 17.09.2018 22.7N 174.8W WEAK 12UTC 17.09.2018 23.5N 176.7W WEAK LITTLE CHANGE 00UTC 18.09.2018 23.6N 178.3W WEAK LITTLE CHANGE 12UTC 18.09.2018 23.3N 179.9W WEAK LITTLE CHANGE 00UTC 19.09.2018 22.4N 179.0E WEAK LITTLE CHANGE 12UTC 19.09.2018 BELOW TROPICAL STORM STRENGTH NEW TROPICAL STORM FORECAST TO DEVELOP AFTER 60 HOURS FORECAST POSITION AT T+ 60 : 18.0N 117.3W VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 19.09.2018 18.0N 117.3W WEAK 00UTC 20.09.2018 19.6N 117.3W WEAK LITTLE CHANGE 12UTC 20.09.2018 20.7N 117.9W WEAK LITTLE CHANGE 00UTC 21.09.2018 22.0N 118.3W WEAK LITTLE CHANGE 12UTC 21.09.2018 24.2N 118.4W WEAK LITTLE CHANGE 00UTC 22.09.2018 26.6N 117.9W WEAK LITTLE CHANGE 12UTC 22.09.2018 28.0N 117.0W WEAK WEAKENING SLIGHTLY 00UTC 23.09.2018 BELOW TROPICAL STORM STRENGTH NEW TROPICAL STORM FORECAST TO DEVELOP AFTER 72 HOURS FORECAST POSITION AT T+ 72 : 35.2N 71.9W VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 00UTC 20.09.2018 35.2N 71.9W WEAK 12UTC 20.09.2018 33.6N 71.9W WEAK LITTLE CHANGE 00UTC 21.09.2018 32.0N 73.1W WEAK LITTLE CHANGE 12UTC 21.09.2018 31.6N 74.5W WEAK LITTLE CHANGE 00UTC 22.09.2018 31.5N 75.7W WEAK LITTLE CHANGE 12UTC 22.09.2018 31.5N 77.2W WEAK LITTLE CHANGE 00UTC 23.09.2018 31.7N 78.8W WEAK LITTLE CHANGE NEW TROPICAL STORM FORECAST TO DEVELOP AFTER 144 HOURS FORECAST POSITION AT T+144 : 36.5N 25.3W VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 00UTC 23.09.2018 36.5N 25.3W 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 170400