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Hurricane Nora Public Advisory Number 15A
2021-08-29 13:37:32| National Hurricane Center (East Pacific)
Issued at 700 AM CDT Sun Aug 29 2021 000 WTPZ34 KNHC 291137 TCPEP4 BULLETIN Hurricane Nora Intermediate Advisory Number 15A NWS National Hurricane Center Miami FL EP142021 700 AM CDT Sun Aug 29 2021 ...NORA VERY NEAR THE COAST OF WEST-CENTRAL MEXICO... ...HEAVY RAINS AND FLOODING CONTINUE... SUMMARY OF 700 AM CDT...1200 UTC...INFORMATION ---------------------------------------------- LOCATION...22.8N 106.1W ABOUT 30 MI...50 KM SE OF MAZATLAN MEXICO ABOUT 240 MI...385 KM E OF CABO SAN LUCAS MEXICO MAXIMUM SUSTAINED WINDS...75 MPH...120 KM/H PRESENT MOVEMENT...NNW OR 345 DEGREES AT 12 MPH...19 KM/H MINIMUM CENTRAL PRESSURE...985 MB...29.09 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Warning is in effect for... * San Blas to Altata Mexico A Hurricane Watch is in effect for... * North of Altata to Topolobampo Mexico A Tropical Storm Warning is in effect for... * North of Altata to Topolobampo Mexico A Tropical Storm Watch is in effect for... * Cabo San Lucas to La Paz Mexico A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area. Preparations to protect life and property should be rushed to completion. A Hurricane Watch means that hurricane conditions are possible within the watch area. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area. Interests elsewhere along the coasts of Sinaloa, Sonora, and Baja California Sur should monitor the progress of Nora. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 700 AM CDT (1200 UTC), the center of Hurricane Nora was located near latitude 22.8 North, longitude 106.1 West. Nora is moving toward the north-northwest near 12 mph (19 km/h). This general motion is expected to continue today, followed by a slower northwestward motion tonight through Tuesday. Nora is forecast to move very near and roughly parallel to the coast of Mexico early this week. However, even a small deviation to the right of the forecast track could cause Nora to move inland and dissipate within the next day or so. Maximum sustained winds are near 75 mph (120 km/h) with higher gusts. Only slight weakening is forecast during the day or two if Nora's center stays over water. However, rapid weakening will likely occur if the center moves inland. Hurricane-force winds extend outward up to 25 miles (35 km) from the center and tropical-storm-force winds extend outward up to 105 miles (165 km). The estimated minimum central pressure is 985 mb (29.09 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Nora can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDEP4, WMO header WTPZ44 KNHC, and on the web at hurricanes.gov/graphics_ep4.shtml?key_messages. WIND: Hurricane conditions are likely in portions of the Hurricane Warning area today and tonight. Hurricane conditions are possible in the Hurricane Watch area on Monday. Tropical storm conditions are likely in the Tropical Storm Warning area in mainland Mexico beginning later today, and are possible within the Tropical Storm Watch area in Baja California Sur on Monday. RAINFALL: Nora is expected to produce additional rainfall of 2 to 4 inches across the coastal portions of the states of Guerrero and Michoacan through Monday. Heavy rainfall is likely along the west coast of Mexico from Colima to Sonora through late week as Nora lifts northward through the Gulf of California. Rainfall of 8 to 12 inches with maximum amounts of 20 inches is possible. This rainfall will produce life-threatening flash flooding and mudslides. Rainfall of 2 to 4 inches with maximum amounts of 6 inches is possible in Baja California Sur. Toward the middle and latter part of the week, moisture associated with Nora is likely to bring heavy rainfall and the potential for scattered flash flooding to portions of the southwestern U.S. and central Rockies. STORM SURGE: A storm surge is expected to produce significant coastal flooding in areas of onshore winds. Near the coast, the surge will be accompanied by large and destructive waves. SURF: Swells generated by Nora are affecting the southwestern coast of Mexico and will spread northward to the coast of Baja California Sur and into the Gulf of California early this week. 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 1000 AM CDT. $$ Forecaster Reinhart
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