Statistical Abstract: Atlantic Hurricane Seasons

[donsutherland1]

STATISTICAL ABSTRACT: ATLANTIC HURRICANE SEASONS
Hurricane Seasons: 1950-2003

Total Storms:
Named Storms: 535
Hurricanes: 324
Major Hurricanes: 137
Category 5 Hurricanes: 23
Category 4 Hurricanes: 48
Category 3 Hurricanes: 66
Category 2 Hurricanes: 59
Category 1 Hurricanes: 128
Tropical Storms: 207

Named Storms:
Most: 19, 1995
Least: 4, 1972 and 1983
Average: 9.9

Hurricanes:
Most: 12, 1969
Least: 2, 1982
Average: 6.0

Major Hurricanes:
Most: 8, 1950
Least: 0, 1968, 1972, 1986, and 1994
Average: 2.5

Highest Percentage of Hurricanes becoming Major Hurricanes: 100%, 1964 (6H/6MH)
Lowest Percentage of Hurricanes becoming Major Hurricanes: 0%, 1968 (5H/0MH)
…Note: 1972, 1986, and 1994 also had no major hurricanes but had fewer hurricanes

Highest Percentage of Named Storms becoming Major Hurricanes: 63.6%, 1961 (11S/7MH)
Lowest Percentage of Named Storms becoming Major Hurricanes: 0%, 1968 (8S/0MH)
…Note: 1972, 1986, and 1994 also had no major hurricanes but had fewer named storms

Hurricanes:
Most Category 5 Storms: 2, 1960, 1961, and 1998
Most Category 4 Storms: 5, 1999
Most Category 4 or 5 Storms: 5, 1999
Most Category 3 Storms: 5, 1950
Most Category 3 Storms or Stronger: 8, 1950
Most Category 2 Storms: 4, 1998
Most Category 1 Storms: 5, 1959, 1968, 1969, and 1990
Most Category 1 or 2 Storms: 7, 1969, 1980, 1990, and 1998

Years with 4 or More Category 4 or Stronger Storms: 1961, 1964, and 1999

Years with at least 1 storm of every Category: 1950, 1951, 1955

Tropical Storms:
Most: 9, 2003
Least: 1, 1952, 1972, 1977, and 1983
Average: 3.8

Seasonal Productivity:
Most days between named storms: 43.5 days, 1952
Fewest days between named storms: 5.2 days, 1950
Average: 12.3 days

Most days between hurricanes: 60.0 days, 1982
Fewest days between hurricanes: 6.1 days, 1950
Average: 23.0 days

Length of Season:
Longest season: 261 days, 1952 (February 2-October 20)
Shortest season: 42 days, 1983 (August 15-September 26)
Average: 121.4 days
…Note: Length of season is measured from the dates storms formed

Storm Formation:
Earliest date for the first named storm: February 2, 1952
Latest date for the first named storm: August 29, 1977

Years in which the first named storm formed before June 1: 1951, 1952, 1953, 1959, 1970, 1981, and 2003
Years in which the first named storm formed August 1 or later: 1950, 1962, 1967, 1974, 1977, 1983, 1984, 1987, 1988, 1992, and 2000

Earliest date for the last named storm: September 17, 1960
Latest date for the last named storm: December 30, 1954

Years in which the last storm formed September 30 or earlier: 1960, 1982, 1983, 1993, and 2002
Years in which the last storm formed December 1 or later: 1953, 1954, 1975, 1984, and 2003

Named Storms by Month of Formation:
February: 1
April: 1
May: 5
June: 31
July: 46
August: 141
September: 190
October: 92
November: 23
December: 5

Hurricanes by Month of Formation:
May: 2
June: 10
July: 25
August: 89
September: 126
October: 54
November: 16
December: 2

Percentage of Named Storms Becoming Hurricanes by Month of Formation:
February: 0.0%
April: 0.0%
May: 40.0%
June: 32.3%
July: 54.3%
August: 63.1%
September: 66.3%
October: 58.6%
November: 69.6%
December: 40.0%

Major Hurricanes by Month of Formation:
May: 1
June: 2
July: 4
August: 48
September: 65
October: 15
November: 2

Percentage of Hurricanes Becoming Major Hurricanes by Month of Formation:
May: 50.0%
June: 20.0%
July: 16.0%
August: 53.9%
September: 51.6%
October: 27.8%
November: 12.5%
December: 0.0%

Early-Starting Seasons and Statistics:
Seasons beginning before June 1:

Averages:
Named Storms: 11.1
Hurricanes: 6.4
Major Hurricanes: 3.1

Most Named Storms: 16, 2003
Least Named Storms: 6, 1952

Most Hurricanes: 7, 1959, 1981, and 2003
Least Hurricanes: 5, 1952 and 1970

Most Major Hurricanes: 5, 1951
Least Major Hurricanes: 2, 1959 and 1970

Late-Starting Seasons and Statistics:
Seasons beginning on or after August 1:

Averages:
Named Storms: 8.5
Hurricanes: 5.2
Major Hurricanes: 2.1

Most Named Storms: 14, 2000
Least Named Storms: 4, 1983

Most Hurricanes: 11, 1950
Least Hurricanes: 3, 1962, 1983, and 1987

Most Major Hurricanes: 8, 1950
Least Major Hurricanes: 1, 1962, 1967, 1977, 1983, 1984, 1987, and 1992

Date of First Storm and Number of Storms:
Before June 1:
6/7 (86%) of seasons had 10 or more named storms; 1/7 (14%) had 8 or fewer named storms
…Average: 11.1 named storms; 6.4 hurricanes; 3.1 major hurricanes
…Most: 16 named storms; 8 hurricanes; 5 major hurricanes
…Least: 6 named storms; 5 hurricanes; 2 major hurricanes

Month in which the last named storm formed:
October: 4
November: 2
December: 2
Earliest: October 15
Latest: December 7

June 1-June 30:
9/23 (39%) of seasons had 10 or more named storms; 14/23 (51%) had 8 or fewer named storms
…Average: 9.2 named storms; 5.5 hurricanes; 2.4 major hurricanes
…Most: 19 named storms; 11 hurricanes; 6 major hurricanes
…Least: 4 named storms; 2 hurricanes; 0 major hurricanes

Month in which the last named storm formed:
September: 3
October: 9
November: 9
December: 2
Earliest: September 17
Latest: December 30

July 1-July 31:
10/13 (77%) of seasons had 10 or more named storms; 2/13 (15%) had 8 or fewer named storms
…Average: 11.5 named storms; 7.3 hurricanes; 2.8 major hurricanes
…Most: 17 named storms; 12 hurricanes; 7 major hurricanes
…Least: 7 named storms; 4 hurricanes; 1 major hurricane

Month in which the last named storm formed:
September: 1
October: 6
November: 6
Earliest: September 21
Latest: November 25

August 1 or later:
4/11 (36%) of seasons had 10 or more named storms; 7/11 (64%) had 8 or fewer named storms
…Average: 8.5 named storms; 5.2 hurricanes; 2.1 major hurricanes
…Most: 14 named storms; 11 hurricanes; 8 major hurricanes
…Least: 4 named storms; 3 hurricanes; 1 major hurricane

Month in which the last named storm formed:
September: 1
October: 8
November: 1
December: 1
Earliest: September 26
Latest: December 12

Landfalling Major U.S. Hurricanes:

Most major hurricanes making landfall: 3, 1954 (1 Category 4; 2 Category 3) and 1955 (3 Category 3)

Years with Category 5 Hurricanes making landfall:
1969 and 1992

Years with Category 4 Hurricanes making landfall:
1954, 1957, 1960, 1961, and 1989

Years with Category 3 Hurricanes making landfall:
1950, 1954, 1955, 1959, 1964, 1965, 1967, 1970, 1974, 1975, 1979, 1980, 1983, 1985, 1993, 1995, 1996, and 1999

Number of seasons with major U.S. landfalling hurricanes (1950-2003): 30/54 (55.6%)

Number of seasons without major U.S. landfalling hurricanes (1950-2003): 24/54 (44.4%)

[yoda]

WOW!!! Great Info there!! Thanks bud!

[donsutherland1]

Yoda,

I'm glad you liked it.