ZCZC MIATCPAT1 ALL TTAA00 KNHC DDHHMM BULLETIN HURRICANE OTTO INTERMEDIATE ADVISORY NUMBER 9A NWS NATIONAL HURRICANE CENTER MIAMI FL AL162016 100 AM EST WED NOV 23 2016 ...OTTO MOVING SLOWLY WEST-NORTHWESTWARD... ...HEAVY RAINFALL EXPECTED OVER PORTIONS OF PANAMA...COSTA RICA...AND NICARAGUA... SUMMARY OF 100 AM EST...0600 UTC...INFORMATION ---------------------------------------------- LOCATION...10.8N 80.0W ABOUT 210 MI...340 KM ENE OF LIMON COSTA RICA ABOUT 270 MI...435 KM ESE OF BLUEFIELDS NICARAGUA MAXIMUM SUSTAINED WINDS...75 MPH...120 KM/H PRESENT MOVEMENT...WNW OR 285 DEGREES AT 5 MPH...7 KM/H MINIMUM CENTRAL PRESSURE...988 MB...29.18 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... * The coast of Nicaragua north of Bluefields to Sandy Bay Sirpi * The coast of Costa Rica south of Limon to the Costa Rica/Panama border A Tropical Storm Warning is in effect for... * The coast of Nicaragua north of Bluefields to Sandy Bay Sirpi * The coast of Panama from Nargana to Colon * San Andres A Tropical Storm Watch is in effect for... * The coast of Panama west of Colon to the Costa Rica/Panama border 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 Hurricane Watch means that hurricane conditions are possible within the watch area, usually within 48 hours. 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, generally within 48 hours. 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 10.8 North, longitude 80.0 West. Otto is moving toward the west-northwest near 5 mph (7 km/h). A westward to west- northwestward motion and an increase in forward speed are expected during the next couple of days. On the forecast track, the center of Otto is expected to move onshore within the hurricane warning area in southern Nicaragua and northern Costa Rica on Thursday. Maximum sustained winds are near 75 mph (120 km/h) with higher gusts. Gradual strengthening is expected until Otto makes landfall in Central America. Hurricane-force winds extend outward up to 10 miles (20 km) from the center and tropical-storm-force winds extend outward up to 60 miles (95 km). The estimated minimum central pressure is 988 mb (29.18 inches). HAZARDS AFFECTING LAND ---------------------- RAINFALL: 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 today. 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 Thursday. These rains will likely result in life-threatening flash floods and mud slides. WIND: Hurricane conditions are expected within the hurricane warning area on Thursday, and are possible in the hurricane watch area on Thursday. Tropical storm conditions are expected within the warning area in Panama tonight and in the warning area in Nicaragua Wednesday night and Thursday. Tropical storm conditions are also possible in the tropical storm watch area in Panama today and in San Andres by late today. STORM SURGE: The combination of a dangerous storm surge and large and destructive waves could raise water levels by as much 2 to 4 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 NNNN