ZCZC MIATCPEP2 ALL TTAA00 KNHC DDHHMM BULLETIN HURRICANE SANDRA INTERMEDIATE ADVISORY NUMBER 16A NWS NATIONAL HURRICANE CENTER MIAMI FL EP222015 1100 AM MST FRI NOV 27 2015 ...SANDRA CONTINUES TO WEAKEN... SUMMARY OF 1100 AM MST...1800 UTC...INFORMATION ----------------------------------------------- LOCATION...20.0N 108.4W ABOUT 165 MI...265 KM SW OF LAS ISLAS MARIAS MEXICO ABOUT 255 MI...410 KM SSW OF MAZATLAN MEXICO MAXIMUM SUSTAINED WINDS...90 MPH...150 KM/H PRESENT MOVEMENT...NNE OR 20 DEGREES AT 12 MPH...19 KM/H MINIMUM CENTRAL PRESSURE...974 MB...28.76 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 San Blas * Las Islas Marias A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area, in this case within the next 12 to 24 hours. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND 48-HOUR OUTLOOK ------------------------------ At 1100 AM MST (1800 UTC), the center of Hurricane Sandra was located near latitude 20.0 North, longitude 108.4 West. Sandra is moving toward the north-northeast near 12 mph (19 km/h), and this general motion is expected to continue for the next 24 to 36 hours. On the forecast track, the center of Sandra is expected to pass west of Las Islas Marias this evening and make landfall within the warning area early Saturday. Maximum sustained winds have decreased to near 90 mph (150 km/h) with higher gusts. Rapid weakening is forecast, and Sandra is expected to weaken to a tropical storm by tonight and become a remnant low and dissipate after moving inland over Mexico on Saturday. Hurricane force winds extend outward up to 35 miles (55 km) from the center and tropical storm force winds extend outward up to 160 miles (260 km). The estimated minimum central pressure is 974 mb (28.76 inches). HAZARDS AFFECTING LAND ---------------------- RAINFALL: Sandra is expected to produce total rainfall accumulations of 1 to 3 inches over the southern portions of the Mexican state of Baja California Sur. Rainfall totals of 4 to 6 inches with isolated maximum amounts of 10 inches are possible across the Mexican states of Sinaloa, Nayarit, northwest Jalisco, western Durango and southern Chihuahua. This rainfall may produce life threatening flash flood and mudslides. WIND: Tropical storm conditions are expected to reach Las Islas Marias later today and reach the coast of mainland Mexico within the warning area this evening. NEXT ADVISORY ------------- Next complete advisory at 200 PM MST. $$ Forecaster Brennan NNNN