AN AIR FORCE RESERVE RECONNAISSANCE AIRCRAFT INVESTIGATING THE AREA
OF DISTURBED WEATHER ABOUT 350 MILES NORTH OF SAN JUAN PUERTO RICO
FOUND A SURFACE TROUGH OF LOW PRESSURE BUT DID NOT FIND A CLOSED
CIRCULATION. HOWEVER...THE AIRCRAFT DID REPORT GALE-FORCE WINDS IN
THE AREA. UPPER-LEVEL WINDS ARE FORECAST TO BECOME MORE CONDUCIVE
FOR DEVELOPMENT...AND THIS SYSTEM HAS THE POTENTIAL TO BECOME A
TROPICAL STORM AT ANY TIME AS IT CONTINUES MOVING WEST-NORTHWESTWARD
AROUND 20 MPH. THERE IS A HIGH CHANCE...GREATER THAN 50 PERCENT
OF TROPICAL CYCLONE FORMATION DURING THE NEXT 48 HOURS. INTERESTS
IN THE BAHAMAS SHOULD MONITOR THE PROGRESS OF THIS SYSTEM.
可看下,建立底层环流,合适的用词就是llc。不完整的llc多着呢,有了完整llc,才会有llcc。
H. REMARKS...SEAN STILL HAS A WELL DEFINED LOW LEVEL CIRCULATION BUT
IS VOID OF ANY CONVECTION. THIS WILL BE THE FINAL BULLETIN ISSUED ON
THIS SYSTEM UNLESS REGENERATION OCCURS.
THE CENTER OR WAVE AXIS OF ANA PASSED OVER BUOY 42060 AROUND
0830Z...AND IF A CENTER EXISTED AT THAT TIME IT WAS SOUTH OF THE
BUOY. THERE WAS ONE SHIP REPORT WITH A LIGHT WEST WIND AT 12Z.
SINCE THAT TIME...NEW CONVECTION WITH A MID-LEVEL SPIN HAS
DEVELOPED NEAR THE SOUTHEAST COAST OF PUERTO RICO. GIVEN THESE
HINTS...WE WILL CONTINUE ADVISORIES AT LEAST UNTIL A RECONNAISSANCE
AIRCRAFT INVESTIGATES ANA THIS AFTERNOON.
AN AIR FORCE RECONNAISSANCE AIRCRAFT INVESTIGATED ANA THIS AFTERNOON
AND DID NOT FIND A CLOSED WIND CIRCULATION. CONSEQUENTLY...ANA IS
NO LONGER A TROPICAL CYCLONE AND THIS WILL BE THE LAST ADVISORY ON
THIS SYSTEM UNLESS REGENERATION OCCURS.