000 WTNT34 KNHC 262343 TCPAT4 BULLETIN Tropical Storm Ida Intermediate Advisory Number 2A NWS National Hurricane Center Miami FL AL092021 800 PM EDT Thu Aug 26 2021 ...IDA FORECAST TO STRENGTHEN... ...TROPICAL STORM CONDITIONS EXPECTED IN THE CAYMAN ISLANDS LATER TONIGHT AND ACROSS WESTERN CUBA ON FRIDAY... SUMMARY OF 800 PM EDT...0000 UTC...INFORMATION ---------------------------------------------- LOCATION...18.0N 80.1W ABOUT 115 MI...185 KM SE OF GRAND CAYMAN ABOUT 120 MI...195 KM W OF NEGRIL JAMAICA MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H PRESENT MOVEMENT...NW OR 310 DEGREES AT 13 MPH...20 KM/H MINIMUM CENTRAL PRESSURE...1006 MB...29.71 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * Cayman Islands * Cuban provinces of Matanzas, Mayabeque, Havana, Artemisa, Pinar del Rio, and the Isle of Youth A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area within 36 hours. Interests elsewhere in central and western Cuba, in the northern Yucatan Peninsula, and along the northern U.S. Gulf coast should monitor the progress of this system. Watches may be required for a portion of the northern Gulf coast later tonight or Friday morning. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 800 PM EDT (0000 UTC), the center of Tropical Storm Ida was located near latitude 18.0 North, longitude 80.1 West. The storm is moving toward the northwest near 13 mph (20 km/h), and this general motion should continue over the next few days. On the forecast track, the center of Ida will pass near or over the Cayman Islands tonight, the Isle of Youth and western Cuba Friday, and over the southeastern and central Gulf of Mexico Friday night and Saturday. The system is forecast to approach the U.S. northern Gulf coast on Sunday. Maximum sustained winds are near 40 mph (65 km/h) with higher gusts. Steady strengthening is forecast during the next few days. Ida is forecast to become a hurricane when it is near western Cuba with additional strengthening expected while it moves over the Gulf of Mexico. Ida could be near major hurricane strength when it approaches the northern Gulf coast. Tropical-storm-force winds extend outward up to 70 miles (110 km) north of the center. The estimated minimum central pressure based on Air Force Reserve reconnaissance data is 1006 mb (29.71 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Tropical Storm Ida can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT4, WMO header WTNT44 KNHC, and on the web at hurricanes.gov/graphics_at4.shtml?key_messages. STORM SURGE: A dangerous storm surge will raise water levels by as much as 2 to 4 feet above normal tide levels in areas of onshore winds along the immediate coast of the Isle of Youth and near and to the east of where the center crosses the coast of western Cuba. Near the coast, the surge will be accompanied by large and destructive waves. WIND: Tropical storm conditions are expected in the Cayman Islands tonight, and are expected to reach the Isle of Youth and portions of western Cuba in the warning area on Friday. RAINFALL: Ida is expected to produce total rainfall accumulations of 6 to 10 inches with maximum totals of 15 inches across Jamaica. Rainfall totals of 8 to 12 inches with isolated maximum amounts of 20 inches are expected across the Cayman Islands and western Cuba, including the Isle of Youth. These rainfall amounts may produce life-threatening flash floods and mudslides. Ida may begin to bring rainfall and potential flooding impacts to the central Gulf Coast by early Sunday. SURF: Swells generated by this system will affect Jamaica, the Cayman Islands and Cuba tonight and Friday. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next complete advisory at 1100 PM EDT. $$ Forecaster Cangialosi