000 WTNT34 KNHC 091443 TCPAT4 BULLETIN TROPICAL STORM HUMBERTO ADVISORY NUMBER 4 NWS NATIONAL HURRICANE CENTER MIAMI FL AL092013 1100 AM AST MON SEP 09 2013 ...HUMBERTO STRENGTHENS A LITTLE SOUTH OF THE CAPE VERDE ISLANDS... SUMMARY OF 1100 AM AST...1500 UTC...INFORMATION ----------------------------------------------- LOCATION...13.6N 24.1W ABOUT 85 MI...135 KM SSE OF FOGO CAPE VERDE ISLANDS MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H PRESENT MOVEMENT...W OR 280 DEGREES AT 12 MPH...19 KM/H MINIMUM CENTRAL PRESSURE...1005 MB...29.68 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY... NONE. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A TROPICAL STORM WARNING IS IN EFFECT FOR... * THE SOUTHERN CAPE VERDE ISLANDS OF MAIO...SANTIAGO...FOGO...AND BRAVA FOR STORM INFORMATION SPECIFIC TO YOUR AREA...PLEASE MONITOR PRODUCTS ISSUED BY YOUR NATIONAL METEOROLOGICAL SERVICE. DISCUSSION AND 48-HOUR OUTLOOK ------------------------------ AT 1100 AM AST...1500 UTC...THE CENTER OF TROPICAL STORM HUMBERTO WAS LOCATED NEAR LATITUDE 13.6 NORTH...LONGITUDE 24.1 WEST. HUMBERTO IS MOVING TOWARD THE WEST NEAR 12 MPH...19 KM/H...AND THIS MOTION IS EXPECTED TO CONTINUE TODAY. A TURN TOWARD THE WEST- NORTHWEST AND NORTHWEST WITH A SLIGHT DECREASE IN FORWARD SPEED IS EXPECTED ON TUESDAY...FOLLOWED BY A TURN TOWARD THE NORTH-NORTHWEST ON WEDNESDAY. ON THE FORECAST TRACK...THE CENTER OF HUMBERTO WILL REMAIN SOUTH AND WEST OF THE CAPE VERDE ISLANDS. MAXIMUM SUSTAINED WINDS HAVE INCREASED TO NEAR 45 MPH...75 KM/H... WITH HIGHER GUSTS. ADDITIONAL STRENGTHENING IS FORECAST DURING THE NEXT 48 HOURS...AND HUMBERTO IS EXPECTED TO BECOME A HURRICANE OVER THE NEXT COUPLE OF DAYS. TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 60 MILES...95 KM TO THE WEST OF THE CENTER. THE ESTIMATED MINIMUM CENTRAL PRESSURE IS 1005 MB...29.68 INCHES. HAZARDS AFFECTING LAND ---------------------- WIND...TROPICAL STORM CONDITIONS SHOULD CONTINUE OVER PORTIONS OF THE SOUTHERN CAPE VERDE ISLANDS THROUGH THE DAY. STRONGER WINDS ARE POSSIBLE IN AREAS OF HIGHER TERRAIN ON THE ISLANDS. RAINFALL...HUMBERTO IS EXPECTED TO PRODUCE TOTAL RAINFALL ACCUMULATIONS OF 2 TO 4 INCHES ACROSS THE SOUTHERN CAPE VERDE ISLANDS...WITH ISOLATED MAXIMUM AMOUNTS OF 6 INCHES POSSIBLE... ESPECIALLY IN AREAS OF MOUNTAINOUS TERRAIN. THESE RAINS COULD PRODUCE LIFE-THREATENING FLASH FLOODS AND MUD SLIDES. NEXT ADVISORY ------------- NEXT INTERMEDIATE ADVISORY...200 PM AST. NEXT COMPLETE ADVISORY...500 PM AST. $$ FORECASTER BERG/PASCH