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Hurricane Helene Forecast Advisory Number 14
2024-09-26 22:50:10| National Hurricane Center (Atlantic)
Issued at 2100 UTC THU SEP 26 2024 007 WTNT24 KNHC 262040 TCMAT4 HURRICANE HELENE FORECAST/ADVISORY NUMBER 14 NWS NATIONAL HURRICANE CENTER MIAMI FL AL092024 2100 UTC THU SEP 26 2024 HURRICANE CENTER LOCATED NEAR 27.9N 84.6W AT 26/2100Z POSITION ACCURATE WITHIN 20 NM PRESENT MOVEMENT TOWARD THE NORTH-NORTHEAST OR 25 DEGREES AT 20 KT ESTIMATED MINIMUM CENTRAL PRESSURE 951 MB MAX SUSTAINED WINDS 110 KT WITH GUSTS TO 135 KT. 64 KT....... 50NE 50SE 30SW 40NW. 50 KT.......100NE 100SE 50SW 50NW. 34 KT.......240NE 270SE 100SW 120NW. 12 FT SEAS..120NE 310SE 390SW 210NW. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 27.9N 84.6W AT 26/2100Z AT 26/1800Z CENTER WAS LOCATED NEAR 26.7N 84.9W FORECAST VALID 27/0600Z 31.5N 83.7W...INLAND MAX WIND 90 KT...GUSTS 110 KT. 64 KT... 40NE 40SE 30SW 0NW. 50 KT...100NE 100SE 50SW 40NW. 34 KT...240NE 270SE 120SW 90NW. FORECAST VALID 27/1800Z 35.8N 85.0W...POST-TROP/EXTRATROP MAX WIND 40 KT...GUSTS 60 KT. 34 KT...120NE 330SE 0SW 0NW. FORECAST VALID 28/0600Z 37.0N 86.5W...POST-TROP/EXTRATROP MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 28/1800Z 37.1N 87.0W...POST-TROP/EXTRATROP MAX WIND 25 KT...GUSTS 35 KT. FORECAST VALID 29/0600Z 37.1N 87.3W...POST-TROP/EXTRATROP MAX WIND 20 KT...GUSTS 30 KT. FORECAST VALID 29/1800Z...DISSIPATED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 27.9N 84.6W INTERMEDIATE PUBLIC ADVISORY...WTNT34 KNHC/MIATCPAT4...AT 27/0000Z NEXT ADVISORY AT 27/0300Z $$ FORECASTER CANGIALOSI
Category:Transportation and Logistics
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Hurricane John Wind Speed Probabilities Number 16
2024-09-26 22:45:40| National Hurricane Center (East Pacific)
Issued at 2100 UTC THU SEP 26 2024 432 FOPZ15 KNHC 262039 PWSEP5 HURRICANE JOHN WIND SPEED PROBABILITIES NUMBER 16 NWS NATIONAL HURRICANE CENTER MIAMI FL EP102024 2100 UTC THU SEP 26 2024 AT 2100Z THE CENTER OF HURRICANE JOHN WAS LOCATED NEAR LATITUDE 17.6 NORTH...LONGITUDE 102.8 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 65 KTS...75 MPH...120 KM/H. Z INDICATES COORDINATED UNIVERSAL TIME (GREENWICH) PACIFIC DAYLIGHT TIME (PDT)...SUBTRACT 7 HOURS FROM Z TIME HAWAIIAN STANDARD TIME (HST)...SUBTRACT 10 HOURS FROM Z TIME WIND SPEED PROBABILITY TABLE FOR SPECIFIC LOCATIONS CHANCES OF SUSTAINED (1-MINUTE AVERAGE) WIND SPEEDS OF AT LEAST ...34 KT (39 MPH... 63 KM/H)... ...50 KT (58 MPH... 93 KM/H)... ...64 KT (74 MPH...119 KM/H)... FOR LOCATIONS AND TIME PERIODS DURING THE NEXT 5 DAYS PROBABILITIES FOR LOCATIONS ARE GIVEN AS OP(CP) WHERE OP IS THE PROBABILITY OF THE EVENT BEGINNING DURING AN INDIVIDUAL TIME PERIOD (ONSET PROBABILITY) (CP) IS THE PROBABILITY OF THE EVENT OCCURRING BETWEEN 18Z THU AND THE FORECAST HOUR (CUMULATIVE PROBABILITY) PROBABILITIES ARE GIVEN IN PERCENT X INDICATES PROBABILITIES LESS THAN 1 PERCENT PROBABILITIES FOR 34 KT AND 50 KT ARE SHOWN AT A GIVEN LOCATION WHEN THE 5-DAY CUMULATIVE PROBABILITY IS AT LEAST 3 PERCENT. PROBABILITIES FOR 34...50...64 KT SHOWN WHEN THE 5-DAY 64-KT CUMULATIVE PROBABILITY IS AT LEAST 1 PERCENT. - - - - WIND SPEED PROBABILITIES FOR SELECTED LOCATIONS - - - - FROM FROM FROM FROM FROM FROM FROM TIME 18Z THU 06Z FRI 18Z FRI 06Z SAT 18Z SAT 18Z SUN 18Z MON PERIODS TO TO TO TO TO TO TO 06Z FRI 18Z FRI 06Z SAT 18Z SAT 18Z SUN 18Z MON 18Z TUE FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT BARRA NAVIDAD 34 X 2( 2) 3( 5) X( 5) 1( 6) X( 6) X( 6) MANZANILLO 34 3 17(20) 7(27) X(27) X(27) X(27) X(27) MANZANILLO 50 X 1( 1) 2( 3) X( 3) X( 3) X( 3) X( 3) L CARDENAS 34 99 X(99) X(99) X(99) X(99) X(99) X(99) L CARDENAS 50 7 1( 8) X( 8) X( 8) X( 8) X( 8) X( 8) ZIHUATANEJO 34 53 1(54) X(54) X(54) X(54) X(54) X(54) $$ FORECASTER KELLY
Category: Transportation and Logistics
Hurricane John Forecast Discussion Number 16
2024-09-26 22:45:36| National Hurricane Center (East Pacific)
Issued at 300 PM CST Thu Sep 26 2024 263 WTPZ45 KNHC 262039 TCDEP5 Hurricane John Discussion Number 16 NWS National Hurricane Center Miami FL EP102024 300 PM CST Thu Sep 26 2024 John has slowed its forward motion this afternoon. A scatterometer pass late this morning confirmed that the motion had slowed and the center is lingering offshore. The inner core of convection has become less pronounced and the circulation may be feeling the orographic effects of the mountainous terrain of southwestern Mexico. However, a strong convective curved band extends in the southwest semi-circle. Dvorak satellite intensity estimates have remained fairly steady this afternoon between 65 to 75 kt. Given the current satellite intensity estimates, the initial intensity for this advisory remains at 65 kt. The hurricane has not been moving much since the previous advisory and the estimated motion is 325/ 2 kt. This slow motion is forecast to continue as John approaches the coastline, moving along the coast or just inland later tonight or early tomorrow. Some of the global model fields keep the system offshore near the coast a little longer. In the long term, a turn back to the west-northwest is anticipated as the system weakens and is steered by a high pressure ridge located over northern Mexico. The overall environment remains favorable for John to strengthen with very warm sea surface temperatures and low wind shear. However, John's proximity to the coastline may continue to disrupt the circulation and not allow for much additional strengthening. The latest NHC intensity forecast shows some slight strengthening over the next 12 h. Models are in fairly good agreement that steady weakening will begin Friday, with the system becoming a depression on Friday night. John has a very large rain shield, and flooding impacts will extend well outside where the system makes landfall. It cannot be emphasized enough that catastrophic life-threatening flash flooding and mudslides are expected to continue through the end of the week for portions of the Mexican States of Guerrero and Michoacan. KEY MESSAGES: 1. Hurricane John will bring additional very heavy rainfall to coastal portions of southwest Mexico through Friday. The additional rainfall totals will be falling across areas that have received very heavy rainfall amounts over the past few days. This heavy rainfall will likely cause significant and catastrophic life-threatening flash flooding and mudslides to the Mexican States of Guerrero and Michoacán. 2. John is forecast to continue strengthening up until landfall, and a Hurricane Warning is in effect along the coastline of southwestern Mexico, where hurricane conditions are imminent. Tropical Storm Warnings are also in effect for portions of the area, where tropical storm conditions are ongoing or imminent. FORECAST POSITIONS AND MAX WINDS INIT 26/2100Z 17.6N 102.8W 65 KT 75 MPH 12H 27/0600Z 18.0N 103.0W 70 KT 80 MPH 24H 27/1800Z 18.6N 103.5W 40 KT 45 MPH...INLAND 36H 28/0600Z 19.2N 104.7W 30 KT 35 MPH...OVER WATER 48H 28/1800Z 19.8N 106.0W 25 KT 30 MPH...POST-TROP/REMNT LOW 60H 29/0600Z 20.6N 107.5W 20 KT 25 MPH...POST-TROP/REMNT LOW 72H 29/1800Z...DISSIPATED $$ Forecaster Kelly
Category: Transportation and Logistics