513  
ABNT30 KNHC 011230  
TWSAT  
 
MONTHLY TROPICAL WEATHER SUMMARY  
NWS NATIONAL HURRICANE CENTER MIAMI FL  
800 AM EDT WED DEC 1 2021  
 
FOR THE NORTH ATLANTIC...CARIBBEAN SEA AND THE GULF OF MEXICO:  
 
NO TROPICAL CYCLONES FORMED IN THE BASIN DURING NOVEMBER. HOWEVER,  
TROPICAL STORM WANDA CONTINUED FROM THE END OF OCTOBER THROUGH THE  
FIRST SEVEN DAYS OF NOVEMBER. BASED ON A 30-YEAR CLIMATOLOGY  
(1991-2020), A TROPICAL STORM FORMS IN NOVEMBER EVERY ONE TO TWO  
YEARS.  
 
OVERALL, THE 2021 ATLANTIC HURRICANE SEASON FEATURED ABOVE NORMAL  
ACTIVITY. TWENTY-ONE NAMED STORMS FORMED, OF WHICH SEVEN BECAME  
HURRICANES AND FOUR BECAME MAJOR HURRICANES - CATEGORY 3 OR HIGHER  
ON THE SAFFIR-SIMPSON HURRICANE WIND SCALE. THIS COMPARES TO THE  
LONG-TERM AVERAGES OF 14 NAMED STORMS, 7 HURRICANES, AND 3 MAJOR  
HURRICANES. IN TERMS OF ACCUMULATED CYCLONE ENERGY (ACE), WHICH  
MEASURES THE STRENGTH AND DURATION OF TROPICAL STORMS AND  
HURRICANES, ACTIVITY IN THE BASIN IN 2021 WAS ALSO ABOVE NORMAL,  
ABOUT 20 PERCENT ABOVE THE LONG-TERM (1991-2020) MEAN.  
 
REPORTS ON INDIVIDUAL CYCLONES, WHEN COMPLETED, ARE AVAILABLE AT  
THE NATIONAL HURRICANE CENTER WEBSITE AT  
WWW.HURRICANES.GOV/DATA/TCR/INDEX.PHP?SEASON=2021&BASIN=ATL  
 
SUMMARY TABLE  
 
NAME DATES MAX WIND (MPH)  
---------------------------------------------------  
TS ANA 22-23 MAY 45*  
TS BILL 14-15 JUN 65*  
TS CLAUDETTE 19-22 JUN 45  
TS DANNY 27-29 JUN 45*  
H ELSA 1- 9 JUL 85  
TS FRED 11-17 AUG 65*  
MH GRACE 13-21 AUG 125  
H HENRI 16-23 AUG 75  
MH IDA 26 AUG- 1 SEP 150  
TS KATE 28 AUG- 1 SEP 45  
TS JULIAN 28-30 AUG 60*  
MH LARRY 31 AUG-11 SEP 125  
TS MINDY 8-10 SEP 45  
H NICHOLAS 12-16 SEP 75  
TS ODETTE 17-18 SEP 45*  
TS PETER 19-22 SEP 50  
TS ROSE 19-23 SEP 50  
MH SAM 22 SEP- 5 OCT 150  
STS TERESA 24-25 SEP 45  
TS VICTOR 29 SEP- 4 OCT 65  
TS WANDA 31 OCT- 7 NOV 50  
---------------------------------------------------  
 
* DENOTES A STORM FOR WHICH THE POST-STORM ANALYSIS IS COMPLETE.  
 

 
HURRICANE SPECIALIST UNIT  
 
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