000 AXNT20 KNHC 190020 TWDAT TROPICAL WEATHER DISCUSSION NWS NATIONAL HURRICANE CENTER MIAMI FL 805 PM EDT FRI SEP 18 2015 TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL ANALYSIS. BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 2315 UTC. ...SPECIAL FEATURES... TROPICAL DEPRESSION NINE IS CENTERED NEAR 18.0N 47.3W AT 18/2100 UTC OR ABOUT 810 NM ENE OF THE LESSER ANTILLES MOVING W-NW AT 5 KT. ESTIMATED MINIMUM CENTRAL PRESSURE IS 1007 MB. MAXIMUM SUSTAINED WIND SPEED IS 25 KT WITH GUSTS TO 35 KT. SCATTERED MODERATE TO ISOLATED STRONG CONVECTION IS MOSTLY N OF THE CENTER FROM 17N-21N BETWEEN 44W-50W. A WEAKENING TREND IS FORECAST... AND THE DEPRESSION IS EXPECTED TO BECOME A REMNANT LOW SAT. PLEASE SEE THE LATEST NHC FORECAST/ADVISORY UNDER AWIPS/WMO HEADERS MIATCMAT4/WTNT24 KNHC FOR MORE DETAILS. TROPICAL DEPRESSION TEN IS CENTER NEAR 13.4N 37.3W AT 18/2100 UTC OR ABOUT 675 NM WSW OF THE CAPE VERDE ISLANDS MOVING WNW AT 7 KT. ESTIMATED MINIMUM CENTRAL PRESSURE IS 1007 MB. MAXIMUM SUSTAINED WIND SPEED IS 30 KT WITH GUSTS TO 40 KT. SCATTERED MODERATE TO ISOLATED STRONG CONVECTION IS FROM 9N-16N BETWEEN 33W-38W. A STRENGTHENING TREND IS FORECAST... AND THE DEPRESSION IS EXPECTED TO BECOME A TROPICAL STORM TONIGHT. PLEASE SEE THE LATEST NHC FORECAST/ADVISORY UNDER AWIPS/WMO HEADERS MIATCMAT5/WTNT25 KNHC FOR MORE DETAILS. ...TROPICAL WAVES... A TROPICAL WAVE IS IN THE FAR WESTERN CARIBBEAN EXTENDING FROM 18N86W TO CENTRAL HONDURAS AT 14N87W TO THE EPAC WATERS MOVING W AT 20 KT. SCATTERED MODERATE TO ISOLATED STRONG CONVECTION IS OVER HONDURAS...NICARAGUA...AND EL SALVADOR FROM 12N-17N BETWEEN 82W AND 89W. ...ITCZ/MONSOON TROUGH... THE MONSOON TROUGH EXTENDS FROM WESTERN AFRICA AT 9N13W TO THE TROPICAL ATLANTIC NEAR 6N22W. THE ITCZ REMAINS INDISCERNIBLE. SCATTERED MODERATE TO STRONG CONVECTION IS ALONG THE COAST OF W AFRICA FROM 7N-13N BETWEEN 11W-16W. ...DISCUSSION... GULF OF MEXICO... AS OF 2100 UTC..A 1006 MB LOW IS CENTERED NEAR NAPLES FLORIDA AT 26N82W. ISOLATED MODERATE CONVECTION CONVECTION IS OVER S FLORIDA AND THE STRAITS OF FLORIDA FROM 23N-26N BETWEEN 80W-83W. A 1012 MB HIGH IS CENTERED OVER E TEXAS NEAR 30N94W PRODUCING FAIR WEATHER. IN THE UPPER LEVELS...A VERY SHARP TROUGH EXTENDS FROM N FLORIDA TO THE BAY OF CAMPECHE. UPPER LEVEL DIFFLUENCE E OF THE AXIS IS PRODUCING SCATTERED MODERATE TO ISOLATED STRONG CONVECTION OVER THE YUCATAN PENINSULA. STRONG SUBSIDENCE IS OVER THE WESTERN GULF W OF THE AXIS. EXPECT OVER THE NEXT 24 HOURS FOR THE SURFACE LOW TO ADVECT CONVECTION TO CENTRAL FLORIDA AND THEN DISSIPATE. CARIBBEAN SEA... A TROPICAL WAVE IS OVER THE WESTERN CARIBBEAN. SEE ABOVE. SLIGHT TO MODERATE BREEZE TRADEWINDS ARE OVER THE REMAINDER OF THE CARIBBEAN DUE TO A RATHER LAX SURFACE PRESSURE GRADIENT. SEAS ARE PREDOMINATELY 6 FT OR LESS. SCATTERED MODERATE CONVECTION IS OVER THE HIGHER ELEVATIONS OF CUBA... JAMAICA...AND HISPANIOLA. SCATTERED MODERATE TO STRONG CONVECTION IS OVER PANAMA...N COLOMBIA..AND NW VENEZUELA. IN THE UPPER LEVELS...AN UPPER LEVEL LOW IS CENTERED S OF HISPANIOLA NEAR 15N73W. UPPER LEVEL DIFFLUENCE E OF THE CENTER IS ENHANCING SCATTERED SHOWERS OVER THE WINDWARD ISLANDS. EXPECT LITTLE CHANGE OVER THE NEXT 24 HOURS. ...HISPANIOLA... SCATTERED MODERATE CONVECTION IS OVER THE HIGHER ELEVATIONS OF HISPANIOLA. EXPECT LITTLE CHANGE OVER THE NEXT 24 HOURS. ATLANTIC OCEAN... THE MAIN FEATURES IN THE BASIN ARE THE TROPICAL DEPRESSIONS. SEE ABOVE. AS OF 2100 UTC...A 1007 MB LOW IS CENTERED OFF THE COAST OF N FLORIDA NEAR 30N78W. SCATTERED MODERATE CONVECTION IS FROM 30N-32N BETWEEN 74W-76W. SCATTERED MODERATE CONVECTION IS ALSO OVER THE N BAHAMAS. A LARGE 1022 MB HIGH IS CENTERED OVER THE CENTRAL ATLANTIC NEAR 37N54W. OF SIGNIFICANCE IN THE UPPER LEVELS... AN UPPER LEVEL LOW IS CENTERED NEAR 26N55W. UPPER LEVEL DIFFLUENCE E OF THE CENTER IS PRODUCING CLUSTERS OF SCATTERED MODERATE CONVECTION FROM 22N-31N BETWEEN 43W-55W. FOR ADDITIONAL INFORMATION PLEASE VISIT HTTP://WWW.HURRICANES.GOV/MARINE $$ FORMOSA