000 ABNT20 KNHC 110509 TWOAT TROPICAL WEATHER OUTLOOK NWS NATIONAL HURRICANE CENTER MIAMI FL 200 AM EDT THU SEP 11 2014 For the North Atlantic...Caribbean Sea and the Gulf of Mexico: Shower activity associated with a broad area of low pressure centered about 750 miles west of the Cape Verde Islands continues to show signs of organization. Conditions are expected to become more favorable for development, and a tropical depression could form during the next day or two while the low moves toward the west- northwest and northwest at about 15 mph over the open Atlantic. * Formation chance through 48 hours...medium...50 percent. * Formation chance through 5 days...high...80 percent. Shower activity associated with a weak low pressure area near the northwestern Bahamas has changed little in organization over the past several hours. Upper-level winds are forecast to become unfavorable for significant development while the low moves slowly westward toward southern Florida. If necessary, however, an Air Force plane will investigate the system later today. Regardless of development, this low will bring locally heavy rains to portions of southern Florida and the Florida Keys during the next couple of days. * Formation chance through 48 hours...low...20 percent. * Formation chance through 5 days...medium...30 percent. $$ Forecaster Pasch