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Hurricane Grace Forecast Advisory Number 30

2021-08-20 22:43:44| National Hurricane Center (Atlantic)

Issued at 2100 UTC FRI AUG 20 2021 000 WTNT22 KNHC 202043 TCMAT2 HURRICANE GRACE FORECAST/ADVISORY NUMBER 30 NWS NATIONAL HURRICANE CENTER MIAMI FL AL072021 2100 UTC FRI AUG 20 2021 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... NONE. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A HURRICANE WARNING IS IN EFFECT FOR... * THE COAST OF MAINLAND MEXICO FROM PUERTO VERACRUZ TO CABO ROJO A TROPICAL STORM WARNING IS IN EFFECT FOR... * THE COAST OF MAINLAND MEXICO FROM NORTH OF CABO ROJO TO BARRA DEL TORDO A HURRICANE WARNING MEANS THAT HURRICANE CONDITIONS ARE EXPECTED SOMEWHERE WITHIN THE WARNING AREA...IN THIS CASE WITHIN 12 TO 24 HOURS. PREPARATIONS TO PROTECT LIFE AND PROPERTY SHOULD BE RUSHED TO COMPLETION. A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE EXPECTED SOMEWHERE WITHING THE WARNING AREA...IN THIS CASE WITHIN 12 TO 24 HOURS. HURRICANE CENTER LOCATED NEAR 20.5N 95.1W AT 20/2100Z POSITION ACCURATE WITHIN 20 NM PRESENT MOVEMENT TOWARD THE WEST OR 265 DEGREES AT 9 KT ESTIMATED MINIMUM CENTRAL PRESSURE 979 MB EYE DIAMETER 25 NM MAX SUSTAINED WINDS 80 KT WITH GUSTS TO 100 KT. 64 KT....... 20NE 0SE 0SW 20NW. 50 KT....... 60NE 30SE 30SW 50NW. 34 KT.......160NE 90SE 80SW 100NW. 12 FT SEAS..240NE 90SE 90SW 240NW. 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 20.5N 95.1W AT 20/2100Z AT 20/1800Z CENTER WAS LOCATED NEAR 20.6N 94.6W FORECAST VALID 21/0600Z 20.4N 96.6W...NEAR THE COAST MAX WIND 90 KT...GUSTS 110 KT. 64 KT... 20NE 10SE 10SW 20NW. 50 KT... 40NE 30SE 20SW 30NW. 34 KT...130NE 70SE 60SW 90NW. FORECAST VALID 21/1800Z 19.9N 98.9W...INLAND MAX WIND 45 KT...GUSTS 55 KT. 34 KT... 50NE 30SE 20SW 40NW. FORECAST VALID 22/0600Z 19.5N 101.9W...INLAND MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 22/1800Z...DISSIPATED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 20.5N 95.1W INTERMEDIATE PUBLIC ADVISORY...WTNT32 KNHC/MIATCPAT2...AT 21/0000Z NEXT ADVISORY AT 21/0300Z $$ FORECASTER REINHART/CANGIALOSI

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Hurricane Grace Graphics

2021-08-20 19:48:55| National Hurricane Center (Atlantic)

5-Day Uncertainty Track last updated Fri, 20 Aug 2021 17:48:55 GMT Wind Speed Probabilities last updated Fri, 20 Aug 2021 15:22:37 GMT

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Summary for Hurricane Grace (AT2/AL072021)

2021-08-20 19:48:09| National Hurricane Center (Atlantic)

...GRACE STRENGTHENS A LITTLE MORE... ...EXPECTED TO MAKE LANDFALL ALONG EASTERN MAINLAND MEXICO TONIGHT... As of 1:00 PM CDT Fri Aug 20 the center of Grace was located near 20.6, -94.5 with movement W at 10 mph. The minimum central pressure was 979 mb with maximum sustained winds of about 90 mph.

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Hurricane Grace Public Advisory Number 29A

2021-08-20 19:48:09| National Hurricane Center (Atlantic)

Issued at 100 PM CDT Fri Aug 20 2021 000 WTNT32 KNHC 201748 TCPAT2 BULLETIN Hurricane Grace Intermediate Advisory Number 29A NWS National Hurricane Center Miami FL AL072021 100 PM CDT Fri Aug 20 2021 ...GRACE STRENGTHENS A LITTLE MORE... ...EXPECTED TO MAKE LANDFALL ALONG EASTERN MAINLAND MEXICO TONIGHT... SUMMARY OF 100 PM CDT...1800 UTC...INFORMATION ---------------------------------------------- LOCATION...20.6N 94.5W ABOUT 145 MI...230 KM NE OF VERACRUZ MEXICO ABOUT 185 MI...300 KM E OF TUXPAN MEXICO MAXIMUM SUSTAINED WINDS...90 MPH...150 KM/H PRESENT MOVEMENT...W OR 265 DEGREES AT 10 MPH...17 KM/H MINIMUM CENTRAL PRESSURE...979 MB...28.91 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Warning is in effect for... * The coast of mainland Mexico from Puerto Veracruz to Cabo Rojo A Tropical Storm Warning is in effect for... * The coast of mainland Mexico from north of Cabo Rojo to Barra del Tordo A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area, in this case within 12 to 24 hours. Preparations to protect life and property should be rushed to completion. A Tropical Storm Warning means that tropical storm conditions are expected somewhere withing the warning area, in this case within 12 to 24 hours. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 100 PM CDT (1800 UTC), the center of Hurricane Grace was located near latitude 20.6 North, longitude 94.5 West. Grace is moving toward the west near 10 mph (17 km/h). This general motion at a slightly slower forward speed is expected during the next day or so. On the forecast track, the center of Grace is forecast to move across the southwestern Gulf of Mexico through this evening, and then make landfall along the coast of mainland Mexico within the hurricane warning area tonight. Data from an Air Force Reserve Hurricane Hunter aircraft indicate that maximum sustained winds have increased to near 90 mph (150 km/h) with higher gusts. Strengthening is forecast until Grace makes landfall, with rapid weakening expected as Grace moves inland over the mountains of central Mexico. Hurricane-force winds extend outward up to 30 miles (45 km) from the center and tropical-storm-force winds extend outward up to 185 miles (295 km). The estimated minimum central pressure of 979 mb (28.91 inches) is based on data collected by the aircraft. HAZARDS AFFECTING LAND ---------------------- Key messages for Grace can be found in the Tropical Cyclone Discussion under AWIPS header MIABOUT 185 MI...300 KM E OF TUXPAN MEXICOATCDAT2, WMO header WTNT42 KNHC and on the web at www.hurricanes.gov/graphics_at2.shtml?key_messages. STORM SURGE: A dangerous storm surge will raise water levels by as much as 4 to 6 ft above normal tide levels along the immediate coast within the hurricane warning area near and north of where the center makes landfall tonight. Near the coast, the surge will be accompanied by large and destructive waves. WIND: Hurricane conditions are expected within portions of the hurricane warning area in mainland Mexico by late this evening, with tropical storm conditions expected later this afternoon. Tropical storm conditions are expected within the tropical storm warning area in mainland Mexico by late this afternoon. RAINFALL: Grace is expected to produce the following rainfall amounts: Over Veracruz, Puebla, Tlaxcala, Hidalgo, northern Queretaro, and eastern San Luis Potosi...6 to 12 inches with isolated maximum totals of 18 inches are expected today through Sunday. Heavy rainfall from Grace will result in areas of flash and urban flooding as well as mudslides. SURF: High surf generated by Grace will affect the southern Gulf of Mexico coastline today and continue into the weekend. 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 400 PM CDT. $$ Forecaster Reinhart/Cangialosi

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