CURRENT TROPICAL CYCLONES:
Tropical Cyclone 13L (Laura)…is located 15 miles west-southwest of Santo Domingo, Dominican Republic
Tropical Cyclone 14L (Marco)…is located 135 miles northwest of the western tip of Cuba
Tropical Cyclone 13L (Laura)
According to the NHC Advisory 13A…Laura is moving toward the west-northwest near 16 mph (26 km/h), and this general motion is expected over the next few days. On the forecast track, the center of Laura will move across Hispaniola today, be near or over Cuba Sunday night and Monday, and over the southeastern Gulf of Mexico Monday night and Tuesday. Maximum sustained winds are near 50 mph (85 km/h) with higher gusts. No significant changes in strength are forecast during the next 36 to 48 hours while Laura moves near or over Hispaniola and Cuba. Strengthening is forecast once Laura moves into the Gulf of Mexico Monday night and Tuesday. Tropical-storm-force winds extend outward up to 140 miles (220 km) from the center.
HAZARDS AFFECTING LAND
RAINFALL: Laura is expected to produce the following rainfall accumulations through Monday:
Puerto Rico and the Virgin Islands: 3 to 6 inches, with maximum amounts of 8 inches possible along eastern portions and the southern slopes.
Dominican Republic and Haiti: 4 to 8 inches, with maximum amounts of 12 inches across southern areas.
Cuba: 3 to 6 inches, with isolated amounts of 8 inches.
This heavy rainfall could lead to life-threatening flash and urban flooding, and the potential for mudslides across the Greater Antilles. Widespread minor to potential moderate river flooding is possible in Puerto Rico.
1 to 3 inches of rain, with isolated maximum totals of 5 inches, is expected over the northern Leeward Islands, the Turks and Caicos, southeast Bahamas and Jamaica.
WIND: Tropical storm conditions are expected within portions of the warning area today through Sunday. Tropical storm conditions are possible within portions of the watch area Sunday night and Monday.
SURF: Swells generated by Laura are affecting portions of the northern Leeward Islands. These swells are expected to spread across the northern coasts of Puerto Rico, Hispaniola, Cuba, much of the Bahamas, and the Florida Keys during the next few days.
Here’s a satellite image of the Atlantic Ocean
Gulf of Mexico:
Tropical Cyclone 14L (Marco)
According to the NHC Advisory 11A…Marco is moving toward the north-northwest near 13 mph (20 km/h). Marco is forecast to continue moving north-northwestward across the central Gulf of Mexico on Sunday and will approach the northern Gulf Coast on Monday. A gradual turn toward the west with a decrease in forward speed is expected after Marco moves inland on Monday and on Tuesday. Data from an Air Force Reserve Hurricane Hunter aircraft indicate that the maximum sustained winds remain near 65 mph (100 km/h) with higher gusts. Some strengthening is anticipated and Marco is forecast to become a hurricane on Sunday. Marco is expected to be at or near hurricane strength when it approaches the northern Gulf Coast on Monday. Rapid weakening is expected after Marco moves inland. Tropical-storm-force winds extend outward up to 70 miles (110 km) from the center.
HAZARDS AFFECTING LAND
STORM SURGE: The combination of a dangerous storm surge and the tide will cause normally dry areas near the coast to be flooded by rising waters moving inland from the shoreline. The water could reach the following heights above ground somewhere in the indicated areas if the peak surge occurs at the time of high tide…
Grand Isle LA to the AL/FL Border including Lake Borgne and Mobile Bay…3-5 ft
Lake Pontchartrain and Lake Maurepas…2-4 ft
Sabine Pass to Grand Isle LA…2-4 ft
The deepest water will occur along the immediate coast in areas of onshore winds, where the surge will be accompanied by large and destructive waves. Surge-related flooding depends on the relative timing of the surge and the tidal cycle, and can vary greatly over short distances.
WIND: Hurricane conditions are possible within the hurricane watch area by midday Monday, with tropical storm conditions possible by early Monday. Tropical storm conditions are possible within the tropical storm watch area on Monday.
Tropical storm conditions are expected to continue within the warning area in Cuba through this evening.
RAINFALL: Marco is expected to produce the following rainfall accumulations through Monday:
Far western Cuba: 2 to 4 inches of rain, with isolated maximum amounts of 6 inches possible
Eastern portions of the Mexican states of Quintana Roo and Yucatan: 1 to 3 inches.
Central U.S. Gulf Coast: 1 to 3 inches, isolated maximum amounts of 5 inches.
This rainfall may result in areas of flash and urban flooding along the Central U.S. Gulf Coast.
Latest satellite image of the Gulf of Mexico