September 2012 Atlantic Summary
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000
ABNT30 KNHC 011239
TWSAT
MONTHLY TROPICAL WEATHER SUMMARY
NWS NATIONAL HURRICANE CENTER MIAMI FL
800 AM EST THU DEC 1 2011
FOR THE NORTH ATLANTIC...CARIBBEAN SEA AND THE GULF OF MEXICO...
ONE TROPICAL STORM...SEAN...FORMED DURING THE MONTH OF NOVEMBER. ON
AVERAGE...A NAMED STORM FORMS DURING NOVEMBER ABOUT ONCE EVERY
OTHER YEAR.
TROPICAL CYCLONE ACTIVITY IN THE ATLANTIC BASIN DURING 2011 WAS
ABOVE AVERAGE. THERE WERE 19 TROPICAL STORMS...INCLUDING AN UNNAMED
STORM DURING SEPTEMBER THAT WAS ADDED DURING THE ROUTINE POST-
ANALYSIS OF DATA FROM THE SEASON. POST-ANALYSIS ALSO REVEALED
THAT NATE REACHED HURRICANE STRENGTH DURING ITS LIFETIME. OF THE 19
STORMS...7 BECAME HURRICANES...AND 3 BECAME MAJOR HURRICANES. ONE
TROPICAL DEPRESSION ALSO FORMED THAT DID NOT REACH TROPICAL STORM
STRENGTH. THE LONG-TERM AVERAGES FOR THE BASIN ARE 11 NAMED
STORMS...6 HURRICANES AND 2 MAJOR HURRICANES. IN TERMS OF
ACCUMULATED CYCLONE ENERGY...ACE...WHICH MEASURES THE COMBINED
STRENGTH AND DURATION OF TROPICAL STORMS AND HURRICANES...2011 WAS
ABOVE NORMAL...WITH A VALUE OF 132 PERCENT OF THE LONG-TERM MEDIAN.
REPORTS ON INDIVIDUAL CYCLONES...WHEN COMPLETED...ARE AT THE WEB
SITE OF THE NATIONAL HURRICANE CENTER...USE LOWER-CASE LETTERS...
HTTP://WWW.NHC.NOAA.GOV/2011ATLAN.SHTML
REPORTS ON SYSTEMS WITH AN ASTERISK NEXT TO THEIR NAME HAVE BEEN
FINALIZED AS OF 1 DECEMBER.
SUMMARY TABLE
NAME DATES MAX WIND (MPH)
----------------------------------------------------
TS ARLENE 29 JUN-1 JUL 65
TS BRET 17-22 JUL 65
*TS CINDY 20-22 JUL 70
*TS DON 27-30 JUL 50
TS EMILY 1-7 AUG 50
*TS FRANKLIN 12-13 AUG 45
*TS GERT 13-16 AUG 65
TS HARVEY 19-22 AUG 60
MH IRENE 20-28 AUG 120
TD TEN 25-26 AUG 35
TS JOSE 28-29 AUG 45
MH KATIA 29 AUG-10 SEP 135
TS UNNAMED 1-2 SEP 45
TS LEE 2-5 SEP 60
H MARIA 6-16 SEP 80
*H NATE 7-11 SEP 75
MH OPHELIA 21 SEP-3 OCT 140
H PHILIPPE 24 SEP-9 OCT 90
H RINA 23-28 OCT 110
TS SEAN 8-11 NOV 65
$$
HURRICANE SPECIALIST UNIT
