261 WTNT80 EGRR 190409 MET OFFICE TROPICAL CYCLONE GUIDANCE FOR NORTH-EAST PACIFIC AND ATLANTIC GLOBAL MODEL DATA TIME 00UTC 19.10.2023 HURRICANE NORMA ANALYSED POSITION : 16.1N 108.0W ATCF IDENTIFIER : EP172023 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 00UTC 19.10.2023 16.1N 108.0W MODERATE 12UTC 19.10.2023 17.3N 108.3W MODERATE LITTLE CHANGE 00UTC 20.10.2023 17.8N 108.8W MODERATE WEAKENING SLIGHTLY 12UTC 20.10.2023 18.9N 109.9W MODERATE LITTLE CHANGE 00UTC 21.10.2023 20.0N 111.3W MODERATE LITTLE CHANGE 12UTC 21.10.2023 21.3N 111.8W MODERATE INTENSIFYING SLIGHTLY 00UTC 22.10.2023 22.2N 112.0W MODERATE LITTLE CHANGE 12UTC 22.10.2023 21.7N 111.8W MODERATE WEAKENING SLIGHTLY 00UTC 23.10.2023 21.4N 111.3W MODERATE WEAKENING SLIGHTLY 12UTC 23.10.2023 21.5N 110.6W MODERATE LITTLE CHANGE 00UTC 24.10.2023 22.5N 109.6W MODERATE LITTLE CHANGE 12UTC 24.10.2023 26.0N 108.4W MODERATE LITTLE CHANGE 00UTC 25.10.2023 BELOW TROPICAL STORM STRENGTH TROPICAL DEPRESSION 91E ANALYSED POSITION : 8.2N 94.5W ATCF IDENTIFIER : EP912023 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 00UTC 19.10.2023 8.2N 94.5W WEAK 12UTC 19.10.2023 BELOW TROPICAL STORM STRENGTH TROPICAL STORM TAMMY ANALYSED POSITION : 13.7N 52.8W ATCF IDENTIFIER : AL202023 VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 00UTC 19.10.2023 13.7N 52.8W WEAK 12UTC 19.10.2023 13.9N 56.0W WEAK LITTLE CHANGE 00UTC 20.10.2023 14.3N 57.4W WEAK LITTLE CHANGE 12UTC 20.10.2023 15.0N 60.3W WEAK LITTLE CHANGE 00UTC 21.10.2023 BELOW TROPICAL STORM STRENGTH NEW TROPICAL STORM FORECAST TO DEVELOP AFTER 48 HOURS FORECAST POSITION AT T+ 48 : 35.6N 71.0W VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 00UTC 21.10.2023 35.6N 71.0W MODERATE 12UTC 21.10.2023 41.1N 66.7W MODERATE INTENSIFYING SLIGHTLY 00UTC 22.10.2023 47.4N 63.0W MODERATE INTENSIFYING SLIGHTLY 12UTC 22.10.2023 47.8N 62.4W STRONG INTENSIFYING SLIGHTLY 00UTC 23.10.2023 47.6N 61.6W MODERATE WEAKENING SLIGHTLY 12UTC 23.10.2023 47.1N 61.6W MODERATE LITTLE CHANGE 00UTC 24.10.2023 44.8N 58.6W MODERATE WEAKENING SLIGHTLY 12UTC 24.10.2023 BELOW TROPICAL STORM STRENGTH NEW TROPICAL STORM FORECAST TO DEVELOP AFTER 162 HOURS FORECAST POSITION AT T+162 : 30.5N 53.9W VERIFYING TIME POSITION STRENGTH TENDENCY -------------- -------- -------- -------- 00UTC 26.10.2023 30.7N 53.2W WEAK LITTLE CHANGE 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 190409