Fred has become a Cat1 hurricane about 445 miles WSW of the Cape Verde Islands. The Cape Verde Islands are a breeding ground for tropical storms. This is where hot tropical waves from the Sahara collide with moist air and get some uplift going. From there the convection engine takes over.
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Here is the latest.
WTNT32 KNHC 090243
HURRICANE FRED ADVISORY NUMBER 6
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL AL072009
1100 PM AST TUE SEP 08 2009
…FRED BECOMES A HURRICANE…THE SECOND OF THE ATLANTIC SEASON…
AT 1100 PM AST…0300 UTC…THE CENTER OF HURRICANE FRED WAS LOCATED
NEAR LATITUDE 12.6 NORTH…LONGITUDE 30.6 WEST OR ABOUT 445 MILES…
715 KM…WEST-SOUTHWEST OF THE SOUTHERNMOST CAPE VERDE ISLANDS.
FRED IS MOVING TOWARD THE WEST-NORTHWEST NEAR 12 MPH…19 KM/HR…
AND A TURN TOWARD THE NORTHWEST IS EXPECTED OVER THE NEXT DAY OR
SO. FRED IS THEN FORECAST TO TURN TOWARD THE NORTH-NORTHWEST WITH
A DECREASE IN FORWARD SPEED ON THURSDAY.
SATELLITE IMAGES INDICATE THAT MAXIMUM SUSTAINED WINDS HAVE
INCREASED TO NEAR 75 MPH…120 KM/HR…WITH HIGHER GUSTS. FRED IS
NOW A CATEGORY ONE HURRICANE ON THE SAFFIR-SIMPSON HURRICANE SCALE.
ADDITIONAL STRENGTHENING IS FORECAST DURING THE DAY OR SO…
FOLLOWED BY SLOW WEAKENING BEGINNING ON THURSDAY.
HURRICANE FORCE WINDS EXTEND OUTWARD UP TO 25 MILES…35 KM…FROM
THE CENTER…AND TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO
85 MILES…140 KM.
ESTIMATED MINIMUM CENTRAL PRESSURE IS 987 MB…29.15 INCHES.
…SUMMARY OF 1100 PM AST INFORMATION…
MAXIMUM SUSTAINED WINDS…75 MPH
PRESENT MOVEMENT…WEST-NORTHWEST OR 295 DEGREES AT 12 MPH
MINIMUM CENTRAL PRESSURE…987 MB
THE NEXT ADVISORY WILL BE ISSUED BY THE NATIONAL HURRICANE CENTER AT
500 AM AST.