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Hurricane Grace Public Advisory Number 22A
2021-08-19 01:54:38| National Hurricane Center (Atlantic)
Issued at 800 PM EDT Wed Aug 18 2021 000 WTNT32 KNHC 182354 TCPAT2 BULLETIN Hurricane Grace Intermediate Advisory Number 22A NWS National Hurricane Center Miami FL AL072021 800 PM EDT Wed Aug 18 2021 ...GRACE EXPECTED TO BRING STRONG WINDS AND A DANGEROUS STORM SURGE TO PORTIONS OF THE EASTERN YUCATAN PENINSULA OF MEXICO... ...AIR FORCE RESERVE AND NOAA HURRICANE HUNTER AIRCRAFT CURRENTLY INVESTIGATING THE HURRICANE... SUMMARY OF 800 PM EDT...0000 UTC...INFORMATION ---------------------------------------------- LOCATION...19.8N 84.9W ABOUT 170 MI...275 KM E OF TULUM MEXICO MAXIMUM SUSTAINED WINDS...80 MPH...130 KM/H PRESENT MOVEMENT...WNW OR 285 DEGREES AT 16 MPH...26 KM/H MINIMUM CENTRAL PRESSURE...989 MB...29.20 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The Meteorological Service of the Cayman Islands has discontinued the Tropical Storm Warning for the Cayman Islands. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Warning is in effect for... * Yucatan Peninsula of Mexico from Cancun to Punta Herrero, including Cozumel A Tropical Storm Warning is in effect for... * Yucatan Peninsula of Mexico from north of Cancun to Campeche * Yucatan Peninsula of Mexico from south of Punta Herrero to Puerto Costa Maya A Tropical Storm Watch is in effect for... * Southern coast Cuban province of Pinar del Rio, as well as Isla de la Juventud A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area. A warning is typically issued 36 hours before the anticipated first occurrence of tropical-storm- force winds, conditions that make outside preparations difficult or dangerous. Preparations to protect life and property should be rushed to completion. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area within 36 hours. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area. Interests elsewhere in eastern mainland Mexico should monitor the progress of Grace. 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 Hurricane Grace was located near latitude 19.8 North, longitude 84.9 West. Grace is moving toward the west-northwest near 16 mph (26 km/h). A general west-northwestward to westward motion is expected for the next several days. On the forecast track, Grace is expected to make landfall in the eastern Yucatan Peninsula Thursday morning, move over the Yucatan Peninsula on Thursday, and move over the southwest Gulf of Mexico Thursday night or early Friday. Maximum sustained winds are near 80 mph (130 km/h) with higher gusts. Some strengthening is possible before the center of Grace reaches the Yucatan Peninsula. Weakening will occur while the center moves over the Yucatan Peninsula on Thursday, with restrengthening expected when Grace moves over the southwest Gulf of Mexico on Friday. Hurricane-force winds extend outward up to 15 miles (30 km) from the center and tropical-storm-force winds extend outward up to 140 miles (220 km). NOAA buoy 40256, located west of the center, recently reported sustained winds of 45 mph (72 km/h) and a wind gust of 51 mph (83 km/h). The minimum central pressure estimated from Air Force Reserve and NOAA Hurricane Hunter aircraft data is 989 mb (29.32 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Grace can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT2, WMO header WTNT42 KNHC and on the web at www.hurricanes.gov/graphics_at2.shtml?key_messages. WIND: Strong gusty winds are likely over portions of the Cayman Islands for the next few hours. Tropical storm conditions are possible along the southern coast of Cuba within the watch area for the next several hours. Hurricane conditions are expected within the warning area in the Yucatan Peninsula of Mexico late tonight or early Thursday, with tropical storm conditions beginning as early as this evening. RAINFALL: The system is expected to produce the following rainfall amounts: Over the Cayman Islands and central to northern portions of the Yucatan Peninsula, 4 to 8 inches of rain with isolated maximum totals of 12 inches are expected through Friday. Heavy rainfall from Grace will likely result in areas of flash and urban flooding Over the central to northern Veracruz state of Mexico, 5 to 10 inches of rain with isolated maximum totals of 15 inches are expected from Friday through Sunday. Heavy rainfall from Grace will likely result in areas of flash and urban flooding, and will also be capable of producing mudslides. STORM SURGE: A dangerous storm surge will raise water levels by as much as 3 to 5 ft above normal tide levels along the immediate coast near and to the north of where the center makes landfall in the northeastern Yucatan Peninsula late tonight or early Thursday. Near the coast, the surge will be accompanied by large and destructive waves. SURF: Swells generated by Grace will spread westward from Jamaica and the Cayman Islands to the southern coast of Cuba and the Yucatan Peninsula of Mexico through Thursday. 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 Beven
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