000 WTNT31 KNHC 221744 TCPAT1 BULLETIN TROPICAL STORM OTTO INTERMEDIATE ADVISORY NUMBER 7A NWS NATIONAL HURRICANE CENTER MIAMI FL AL162016 100 PM EST TUE NOV 22 2016 ...OTTO EXPECTED TO BECOME A HURRICANE LATER TODAY... SUMMARY OF 100 PM EST...1800 UTC...INFORMATION ---------------------------------------------- LOCATION...10.4N 79.4W ABOUT 320 MI...510 KM ESE OF BLUEFIELDS NICARAGUA ABOUT 245 MI...395 KM E OF LIMON COSTA RICA MAXIMUM SUSTAINED WINDS...70 MPH...110 KM/H PRESENT MOVEMENT...STATIONARY MINIMUM CENTRAL PRESSURE...986 MB...29.12 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Watch is in effect for... * Costa Rica/Panama border to south of Bluefields A Tropical Storm Warning is in effect for... * Nargana to Colon A Tropical Storm Watch is in effect for... * San Andres * West of Colon to the Costa Rica/Panama border A Hurricane Watch means that hurricane conditions are possible within the watch area. A watch is typically issued 48 hours before the anticipated first occurrence of tropical-storm-force winds, conditions that make outside preparations difficult or dangerous. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area, in this case during the day today. 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 PM EST (1800 UTC), the center of Tropical Storm Otto was located near latitude 10.4 North, longitude 79.4 West. Otto is stationary and a westward drift is expected to begin later today, followed by a faster westward motion on Wednesday. On the forecast track, Otto should be approaching the coasts of Nicaragua and Costa Rica on Thursday. Maximum sustained winds remain near 70 mph (110 km/h) with higher gusts. Otto is expected to become a hurricane later today, with additional strengthening forecast through Thursday. Tropical-storm-force winds extend outward up to 70 miles (110 km) from the center. The estimated minimum central pressure is 986 mb (29.12 inches). HAZARDS AFFECTING LAND ---------------------- RAINFALL: Outer rain bands from Otto are expected to produce rainfall accumulations of 3 to 6 inches over San Andres and Providencia islands, and the higher terrain of central and western Panama and southern Costa Rica through Wednesday. 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: Tropical storm conditions are expected within the warning area today and tonight. Tropical storm conditions are possible within the tropical storm watch area on Wednesday or Wednesday night. Hurricane conditions are possible within the hurricane watch area on Thursday. 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 PM EST. $$ Forecaster Blake/Pasch