000 WTNT31 KNHC 240535 TCPAT1 BULLETIN HURRICANE OTTO INTERMEDIATE ADVISORY NUMBER 13A NWS NATIONAL HURRICANE CENTER MIAMI FL AL162016 100 AM EST THU NOV 24 2016 ...OTTO BRINGING FLOODING RAINS TO COSTA RICA AND NICARAGUA AS IT CONTINUES WESTWARD... SUMMARY OF 100 AM EST...0600 UTC...INFORMATION ---------------------------------------------- LOCATION...11.2N 82.4W ABOUT 90 MI...150 KM NNE OF LIMON COSTA RICA ABOUT 110 MI...175 KM ESE OF BLUEFIELDS NICARAGUA MAXIMUM SUSTAINED WINDS...85 MPH...140 KM/H PRESENT MOVEMENT...W OR 270 DEGREES AT 9 MPH...15 KM/H MINIMUM CENTRAL PRESSURE...981 MB...28.97 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Warning is in effect for... * Limon Costa Rica to Bluefields Nicaragua A Hurricane Watch is in effect for... * North of Bluefields to Sandy Bay Sirpi Nicaragua * South of Limon to the Costa Rica/Panama border A Tropical Storm Warning is in effect for... * North of Bluefields to Sandy Bay Sirpi Nicaragua * San Andres * Puntarenas Costa Rica to Puerto Sandino Nicaragua A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area. A Hurricane Watch means that hurricane conditions are possible within the watch area. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area. Interests elsewhere in Nicaragua, Costa Rica, and Providencia Island should monitor the progress of Otto. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND 48-HOUR OUTLOOK ------------------------------ At 100 AM EST (0600 UTC), the center of Hurricane Otto was located near latitude 11.2 North, longitude 82.4 West. Otto is moving toward the west near 9 mph (15 km/h), and this general motion is forecast to continue for the next couple of days with an increase in forward speed expected later today. On the forecast track, the center of Otto will move onshore within the hurricane warning area later today, and reach the Pacific coast of southern Nicaragua or northern Costa Rica early Friday. Maximum sustained winds are near 85 mph (140 km/h) with higher gusts. Some strengthening is possible before landfall, with weakening expected as the cyclone crosses southern Nicaragua and northern Costa Rica. Hurricane-force winds extend outward up to 10 miles (20 km) from the center and tropical-storm-force winds extend outward up to 70 miles (110 km). The estimated minimum central pressure is 981 mb (28.97 inches). HAZARDS AFFECTING LAND ---------------------- RAINFALL: Total rainfall of 6 to 12 inches, with isolated amounts of 15 to 20 inches, can be expected across northern Costa Rica and southern Nicaragua through today. These rains will likely result in life-threatening flash floods and mud slides. Outer rain bands from Otto are expected to produce rainfall accumulations of 4 to 8 inches over San Andres and Providencia islands, and the higher terrain of central and western Panama and southern Costa Rica through this morning. WIND: Hurricane conditions are expected within the hurricane warning area today, with tropical storm conditions expected to begin in the next few hours. Hurricane conditions are possible in the hurricane watch area today. Tropical storm conditions are expected on San Andres overnight. Tropical storm conditions are expected within the warning area on the Caribbean coast of Nicaragua today. Tropical storm conditions are expected in the warning area along the Pacific coasts of Costa Rica and Nicaragua by tonight. STORM SURGE: The combination of a dangerous storm surge and large and destructive waves could raise water levels by as much 3 to 5 feet above normal tide levels in areas of onshore flow within the hurricane warning area. SURF: Swells generated by Otto are likely to cause life-threatening surf and rip current conditions over the next several days along the coasts of Panama, Costa Rica, and Nicaragua. Please consult products from your local weather office. NEXT ADVISORY ------------- Next complete advisory at 400 AM EST. $$ Forecaster Brennan