917 WTNT80 EGRR 210402 MET OFFICE TROPICAL CYCLONE GUIDANCE FOR NORTH-EAST PACIFIC AND ATLANTIC GLOBAL MODEL DATA TIME 00UTC 21.09.2018 TROPICAL DEPRESSION 97L ANALYSED POSITION : 8.7N 51.9W ATCF IDENTIFIER : AL972018 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 00UTC 21.09.2018 8.7N 51.9W WEAK 12UTC 21.09.2018 BELOW TROPICAL STORM STRENGTH TROPICAL STORM 98L ANALYSED POSITION : 33.6N 64.2W ATCF IDENTIFIER : AL982018 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 00UTC 21.09.2018 33.6N 64.2W WEAK 12UTC 21.09.2018 31.6N 63.6W WEAK LITTLE CHANGE 00UTC 22.09.2018 29.9N 64.2W WEAK LITTLE CHANGE 12UTC 22.09.2018 28.9N 65.2W WEAK LITTLE CHANGE 00UTC 23.09.2018 28.0N 66.4W WEAK LITTLE CHANGE 12UTC 23.09.2018 27.3N 68.1W WEAK LITTLE CHANGE 00UTC 24.09.2018 BELOW TROPICAL STORM STRENGTH TROPICAL DEPRESSION 99L ANALYSED POSITION : 8.9N 14.6W ATCF IDENTIFIER : AL992018 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 00UTC 21.09.2018 8.9N 14.6W WEAK 12UTC 21.09.2018 BELOW TROPICAL STORM STRENGTH NEW TROPICAL STORM FORECAST TO DEVELOP AFTER 30 HOURS FORECAST POSITION AT T+ 30 : 33.1N 45.0W VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 22.09.2018 33.2N 44.0W WEAK INTENSIFYING RAPIDLY 00UTC 23.09.2018 33.7N 45.0W WEAK LITTLE CHANGE 12UTC 23.09.2018 32.0N 45.4W WEAK LITTLE CHANGE 00UTC 24.09.2018 BELOW TROPICAL STORM STRENGTH NEW TROPICAL STORM FORECAST TO DEVELOP AFTER 66 HOURS FORECAST POSITION AT T+ 66 : 9.7N 31.4W VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 00UTC 24.09.2018 10.6N 33.2W WEAK WEAKENING SLIGHTLY 12UTC 24.09.2018 11.5N 37.5W WEAK INTENSIFYING SLIGHTLY 00UTC 25.09.2018 12.2N 41.3W MODERATE INTENSIFYING SLIGHTLY 12UTC 25.09.2018 12.7N 44.7W MODERATE LITTLE CHANGE 00UTC 26.09.2018 13.5N 47.6W MODERATE LITTLE CHANGE 12UTC 26.09.2018 14.1N 49.9W MODERATE LITTLE CHANGE 00UTC 27.09.2018 15.3N 51.7W MODERATE LITTLE CHANGE NEW TROPICAL STORM FORECAST TO DEVELOP AFTER 78 HOURS FORECAST POSITION AT T+ 78 : 33.5N 48.9W VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 24.09.2018 32.5N 49.4W WEAK LITTLE CHANGE 00UTC 25.09.2018 31.6N 47.5W WEAK LITTLE CHANGE 12UTC 25.09.2018 32.4N 46.2W WEAK LITTLE CHANGE 00UTC 26.09.2018 31.2N 43.6W WEAK LITTLE CHANGE 12UTC 26.09.2018 BELOW TROPICAL STORM STRENGTH NEW TROPICAL STORM FORECAST TO DEVELOP AFTER 132 HOURS FORECAST POSITION AT T+132 : 35.6N 74.5W VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 12UTC 26.09.2018 35.6N 74.5W WEAK 00UTC 27.09.2018 38.0N 71.8W WEAK LITTLE CHANGE NEW TROPICAL STORM FORECAST TO DEVELOP AFTER 138 HOURS FORECAST POSITION AT T+138 : 37.7N 38.9W VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 00UTC 27.09.2018 37.5N 40.5W MODERATE INTENSIFYING RAPIDLY 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 210402