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Tropical Storm Ileana Forecast Discussion Number 9

2024-09-14 16:38:53| National Hurricane Center (East Pacific)

Issued at 800 AM MST Sat Sep 14 2024 000 WTPZ44 KNHC 141438 TCDEP4 Tropical Storm Ileana Discussion Number 9 NWS National Hurricane Center Miami FL EP092024 800 AM MST Sat Sep 14 2024 Satellite imagery shows that Ileana is being affected by increasing southwesterly shear. A large burst of convection that occurred in the early morning hours has moved northeast of the exposed low-level center, while new convection is forming to the north and southeast of the center. The initial intensity is held at 35 kt based on various satellite intensity estimates and earlier surface data from Topolobampo, Mexico. The initial motion is just east of due north or 010/6 kt. This general motion should continue for the next 6 hours or so, bringing the center near or over the coast of Mexico near Topolobampo and Los Mochis today. After that, Ileana should begin a slow motion toward the northwest over the Gulf of California roughly parallel to the coast of Mexico, with this motion continuing until the system dissipates. The new track forecast is nudged to the north and east of the previous track and lies near the various consensus models. Ileana is expected to weaken below tropical-storm strength later today due to a combination of shear and land interaction. However, before that happens, the cyclone should bring tropical storm conditions to portions of the northern coast of Sinaloa and southern coast of Sonora through this afternoon. The system is expected to degenerate to a remnant low between 12-24 h, with the remnant low dissipating over the central Gulf of California on Monday. Key Messages: 1. Tropical Storm Ileana will bring heavy rainfall to portions of coastal Sinaloa, Mexico through this weekend. This heavy rainfall will bring a risk of flash flooding and mudslides to portions of the area. 2. Tropical storm conditions are expected within the warning area of northern Sinaloa and southern Sonora through this afternoon. FORECAST POSITIONS AND MAX WINDS INIT 14/1500Z 24.9N 108.9W 35 KT 40 MPH 12H 15/0000Z 25.6N 109.2W 30 KT 35 MPH...NEAR COAST 24H 15/1200Z 26.3N 109.8W 25 KT 30 MPH...POST-TROP/REMNT LOW 36H 16/0000Z 26.9N 110.3W 25 KT 30 MPH...POST-TROP/REMNT LOW 48H 16/1200Z 27.7N 111.0W 20 KT 25 MPH...POST-TROP/REMNT LOW 60H 17/0000Z...DISSIPATED $$ Forecaster Beven


Category:Transportation and Logistics

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Summary for Tropical Storm Ileana (EP4/EP092024)

2024-09-14 16:38:29| National Hurricane Center (East Pacific)

...ILEANA MOVES CLOSER TO THE COAST OF MAINLAND MEXICO... ...TROPICAL STORM CONDITIONS AND HEAVY RAINS SPREADING ONSHORE... As of 8:00 AM MST Sat Sep 14 the center of Ileana was located near 24.9, -108.9 with movement N at 7 mph. The minimum central pressure was 1002 mb with maximum sustained winds of about 40 mph.


Category: Transportation and Logistics

 

 

Tropical Storm Ileana Public Advisory Number 9

2024-09-14 16:38:29| National Hurricane Center (East Pacific)

Issued at 800 AM MST Sat Sep 14 2024 000 WTPZ34 KNHC 141438 TCPEP4 BULLETIN Tropical Storm Ileana Advisory Number 9 NWS National Hurricane Center Miami FL EP092024 800 AM MST Sat Sep 14 2024 ...ILEANA MOVES CLOSER TO THE COAST OF MAINLAND MEXICO... ...TROPICAL STORM CONDITIONS AND HEAVY RAINS SPREADING ONSHORE... SUMMARY OF 800 AM MST...1500 UTC...INFORMATION ---------------------------------------------- LOCATION...24.9N 108.9W ABOUT 60 MI...100 KM S OF LOS MOCHIS MEXICO ABOUT 100 MI...160 KM ENE OF LA PAZ MEXICO MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H PRESENT MOVEMENT...N OR 10 DEGREES AT 7 MPH...11 KM/H MINIMUM CENTRAL PRESSURE...1002 MB...29.59 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * Altata to Huatabampito Mexico A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area, in this case within 12 hours. Interests elsewhere in the Mexican states of Baja California Sur, Sinaloa, and Sonora should closely monitor the progress of Ileana. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 800 AM MST (1500 UTC), the center of Tropical Storm Ileana was located near latitude 24.9 North, longitude 108.9 West. Ileana is moving toward the north near 7 mph (11 km/h), and this general motion is expected to continue today. A slower motion toward the north-northwest and northwest is expected tonight and on Sunday. On the forecast track, the center of Ileana will move near or over the coasts of northern Sinaloa and southern Sonora later today, and then move over the Gulf of California roughly parallel to the coast on Sunday. Maximum sustained winds are near 40 mph (65 km/h) with higher gusts. Weakening is forecast to begin later this afternoon or evening, and Ileana is likely to degenerate into a remnant low tonight. The remnant low is expected to dissipate by Monday. Tropical-storm-force winds extend outward up to 60 miles (95 km) from the center. The estimated minimum central pressure is 1002 mb (29.59 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Ileana can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDEP4 and WMO header WTPZ44 KNHC. RAINFALL: Tropical Storm Ileana is expected to bring additional rainfall amounts of 3 to 6 inches, with localized higher amounts up to 10 inches, across northwest coastal Sinaloa through this weekend. For a complete depiction of forecast rainfall associated with Tropical Storm Ileana, please see the National Weather Service Storm Total Rainfall Graphic, available at hurricanes.gov/graphics_ep4.shtml?rainqpf WIND: Tropical storm conditions are expected across portions of the warning area in northern Sinaloa and southern Sonora through this afternoon. SURF: Swells generated by Ileana will affect portions of the Gulf of California coasts of Sinaloa, southern Sonora, and southern Baja California Sur during the next day or so. These swells could cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next intermediate advisory at 1100 AM MST. Next complete advisory at 200 PM MST. $$ Forecaster Beven


Category: Transportation and Logistics

 

 

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