At 200 PM AST, the center of Tropical Storm Erika was located near latitude 17.7 North, longitude 70.2 West. Erika has been moving westward near 18 mph (30 km/h) for the past several hours. A motion toward the west-northwest is expected to being later this afternoon or tonight and continue through Sunday. Erika is forecast to move over the Dominican Republic and Haiti during the next few hours, move near the Turks and Caicos Islands tonight, and move near the central and northwestern Bahamas Saturday and Saturday night.
At 500 PM AST (2100 UTC), the center of Tropical Storm Erika was located near latitude 16.6 North, longitude 58.9 West. Erika is moving toward the west near 17 mph (28 km/h). Tropical storm conditions are expected to first reach the warning area in the Leeward Islands tonight, and the initial rain bands could begin affecting the BVI as early as Thursday morning with more intense effects occurring when the eye of the storm passes over or near the BVI. Sea conditions will begin to deteriorate tonight. Rough seas in excess of 10 feet is expected and the Antigua Meteorological Service has already issued a marine warning for mariners, small craft operators and sea bathers.
At 1100 AM AST (1500 UTC), the center of Tropical Storm Erika was located near latitude 16.1 North, longitude 57.6 West. Erika is moving toward the west near 17 mph (28 km/h), and a west to west-northwestward motion is expected over the next 48 hours. On the forecast track, the center of Erika will move near the Virgin Islands and Puerto Rico on Thursday. Maximum sustained winds are near 45 mph (75 km/h) with higher gusts. Little change in strength is forecast during the next 48 hours.
At 11:00 a.m., the center of Tropical Storm Erika was located near latitude 15.2 degrees north, longitude 51 degrees west or about 909 miles east-southeast of the BVI. Erika is moving toward the west near 20 miles per hour (mph). A west-northwestward motion at a slightly slower forward speed is expected over the next 48 hours. On the forecast track, the center of Erika will be near the Leeward Islands Wednesday night and early Thursday. Maximum sustained winds remain near 45 mph with higher gusts. Some slow strengthening is possible during the next 48 hours. Tropical storm force winds extend outward up to 80 miles from the center.
At 8:00am Invest 98L was located at 14.2N, 43.6W, about 1250 miles east of the southern Lesser Antilles. Shower and thunderstorm activity associated with this low pressure system has continued to become better organized since yesterday. Satellite data also indicates that the low's circulation is gradually becoming better defined. If current trends continue, a tropical depression is likely to form later today or tonight while the low moves westward at around 20 mph.
On 9th April 2015, the Department of Atmospheric Science at Colorado State University, issued its Extended Range Forecast of Atlantic Seasonal Hurricane Activity and Landfall Strike Probability for 2015.