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AUGUST TROPICAL STORMS (1851-2011):

By: ncforecaster, 4:51 AM GMT on August 05, 2012

Hey everyone,

This particular blog entry is an updated version of a similar blog entry I wrote last year (to account for the 2011 season and various other HURDAT revisions). In it, we will continue our examination of the entire historical record (1851-present), with a focus on "August" Tropical Cyclone (TC) activity throughout the North Atlantic basin. An "August" TC will be characterized as one that initially developed at some point during the month of August (i.e. August 1-August 31). Those TC's (shown by year) that achieved hurricane (H) and/or "major" hurricane (MH) intensity, will be designated by bold case print in the following respective sections.

ALL TROPICAL STORMS:

Note: These totals include Subtropical Storms (STS), as well.

7 = 1995 (2 H/2 MH), 2004 (2 H/2 MH), and 2011 (1 MH/1 H, MH Sept.).

6 = 1933 (2 MH/1 H Aug., MH Sept.), 1936 (3 H).

5 = 1856 (1 H/2 MH), 1881 (3 H), 1893 (2 H/3 MH), 1969 (1 H/2 MH/1 MH Sept.), 1976 (2 H/1 MH/1 H Aug., MH Sept.), 1990 (1 H/1 MH), and 2005 (1 H/1 MH).

4 = 1855 (3 H), 1863, 1879 (2 H/2 MH), 1880 (3 H/1 MH), 1901 (2 H/1 H Sept.), 1909 (1 MH), 1916 (2 H/1 MH), 1918 (2 H/1 MH), 1945 (1 MH), 1950 (3 MH/1 H Aug., MH Sept.), 1955 (1 H/2 MH), 1958 (2 MH/1 H Aug., MH Sept.), 1971 (2 H), 1974 (1 STS/1 MH/1 H Aug., MH Sept.), 1978 (1 H/1 H Aug., MH Sept.), 1984 (1 STS), 1993 (1 MH), 1996 (1 H/1 MH/1 H Aug., MH Sept.), 1998 (1 MH/1 H/1 H Sept.), 1999 (2 MH/1 H), 2000 (1 MH/1 H), 2008 (1 MH/1 H Sept.), 2009 (1 MH), and 2010 (2 MH).

3 = 1853 (1 H Aug., MH Sept.), 1869, 1871 (1 H/2 MH), 1878, 1885 (1 H/1 MH), 1886 (3 MH), 1911 (2 H), 1913 (1 H Sept.), 1915 (1 MH/1 H Aug.,MH Sept./1 H Sept.), 1932 (1 H/1 MH/1 MH Sept.), 1935 (1 MH/1 MH Sept.), 1938 (1 MH/1 H), 1940, 1942 (2 H/1 MH), 1949 (1 H/1 MH), 1951 (1 MH/1 MH Sept.), 1953 (1 H/1 MH Sept.), 1964 (1 MH), 1979 (1 MH/1 MH Sept.), 1980 (2 H/1 MH), 1981 (1 H/1 STS Aug., H Sept.), 1985 (2 H/1 H Aug., MH Sept.), 1987 (1 H), 1988, 1989 (1 H/1 H Aug., MH Sept./ 1 H Sept.), 2001, 2002, 2003 (1 H/1 MH), 2006 (1 H), and 2007 (1 MH/1 MH Sept.).

2 = 1860 (1 H/1 MH), 1861, 1867, 1874 (1 H/1 H Sept.), 1883 (1 H/1 MH), 1887 (2 MH), 1888 (1 MH/1 H Aug, MH Sept.), 1890 (1 MH), 1891 (1 H/1 MH), 1894 (1 MH Sept.), 1895 (1 H), 1898, 1899 (1 H/1 MH), 1906 (1 H Aug., MH Sept.), 1910, 1917 (1 H Aug., MH Sept.), 1924 (1 H/1 MH), 1925 (1 H), 1928, 1930 (1 MH/1 H Aug., MH Sept.), 1931, 1934 (1 H), 1937, 1939 (1 H), 1943 (1 MH), 1944 (1 MH), 1947, 1948 (1 MH), 1952 (1 H/1 H Aug., MH Sept.), 1954 (1 H/1 MH?), 1960 (1 H/1 MH Sept.), 1962 (1 H), 1965 (1 H/1 H Aug., MH Sept.), 1970, 1972 (1 H), 1973 (1 H), 1975 (1 H/1 MH), 1983 (1 H/1 MH), and 1994 (1 H).

1 = 1851 (MH), 1852 (MH), 1854, 1858, 1859, 1862, 1864, 1865, 1866, 1870, 1872, 1873 (MH), 1875, 1877, 1882, 1889, 1892, 1896 (H Aug., MH Sept.), 1897 (H Sept.), 1900 (MH Sept.), 1903 (MH), 1908, 1926 (MH), 1927 (MH), 1946, 1956 (MH), 1957, 1959, 1963 (MH), 1966 (MH), 1967 (H Sept.), 1968, 1977 (H Aug., MH Sept.), 1982, 1986, 1991 (MH), and 1992 (MH).

0 = 1857, 1868, 1876, 1884, 1902, 1904, 1905, 1907, 1912, 1914, 1919, 1920, 1921, 1922, 1923, 1929, 1941, 1961, and 1997.

Note: Storm #6 (MH Dora) of the 1964 season and storm #4 (H Debby) of 1988 were each a late "August" TC that didn't achieve TS intensity until the succeeding month of September.

In addition: Storm #3 of 1853 (MH), storm #5 of 1856 (TS), storm #3 of 1864 (TS), storm #4 of 1867 (TS), storm #2 of 1870 (H), storm #5 of 1871 (H), storm #2 of 1872 (H), storm #3 of 1874 (H), storm #4 of 1879 (MH), storm #4 of 1880 (TS), storm #5 of 1880 (H), storm #4 of 1888 (MH), storm #3 of 1890 (H), storm #3 of 1894 (MH), storm #2 of 1896 (MH), storm #1 of 1897 (H), storm #2 of 1898 (TS), storm #3 of 1899 (H), storm #1 of 1900 (MH), storm #7 of 1901 (H), storm #4 of 1906 (MH), storm #5 of 1908 (TS), storm #4 of 1913 (H), storm #3 of 1915 (MH), storm #4 of 1915 (H), storm #8 of 1916 (TS), storm #3 of 1917 (MH), storm #4 of 1918 (TS), storm #4 of 1924 (H), storm #2 of 1930 (MH), storm #3 of 1932 (TS), storm #4 of 1932 (MH), storm #11 of 1933 (MH), storm #12 of 1933 (MH), storm #5 of 1934 (TS), storm #2 of 1935 (MH), storm #3 of 1935 (TS), storm #11 of 1936 (H), storm #4 of 1940 (H), storm #3 of 1942 (TS), storm #4 of 1948 (TS), storm #3 of 1949 (TS), storm #3 of 1950 (H Charlie), storm #4 of 1950 (MH Dog), storm #4 of 1951 (MH Dog), storm #2 of 1952 (TS Able), storm #3 of 1952 (MH Baker), storm #3 of 1953 (TS), storm #4 (MH Carol), storm #4 of 1954 (H Dolly), storm #5 of 1958 (MH Ella), storm #5 of 1960 (MH Donna), storm #5 of 1964 (H Cleo), storm #3 of 1965 (MH Betsy), storm #6 of 1966 (H Faith), storm #1 of 1967 (H Arlene), storm #6 of 1969 (MH Francelia), storm #3 of 1972 (TS Betty), storm #4 of 1972 (TS Carrie), storm #4 of 1973 (TS Christine), storm #5 of 1974 (H Becky), storm #6 (MH Carmen), storm #4 of 1975 (H Doris), storm #6 of 1976 (H Emmy), storm #7 of 1976 (MH Frances), storm #1 of 1977 (MH Anita), storm #6 of 1978 (MH Ella), storm #4 of 1979 (MH David), storm #5 of 1979 (TS Elena), storm #6 of 1979 (MH Frederic), storm #5 of 1981 (H Emily), storm #3 of 1982 (TS Beryl), storm #3 of 1984 (TS Bertha), storm #4 of 1984 (TS Cesar), storm #5 (MH Elena), storm #6 of 1989 (H Felix), storm #7 of 1989 (MH Gabrielle), storm #7 of 1990 (MH Gustav), storm #5 of 1993 (MH Emily), storm #9 of 1995 (H Iris), storm #11 of 1995 (TS Karen), storm #12 of 1995 (MH Luis), storm #5 of 1996 (MH Edouard), storm #6 of 1996 (MH Fran), storm #7 of 1996 (TS Gustav), storm #4 of 1998 (H Danielle), storm #5 of 1998 (H Earl), storm #4 of 1999 (TS Dennis), storm #4 of 2002 (TS Dolly), storm #6 of 2003 (MH Fabian), storm #6 of 2004 (MH Frances), storm #7 of 2004 (TS Gaston), storm #6 of 2006 (TS Ernesto), storm #6 of 2007 (MH Felix), storm #7 of 2008 (H Gustav), storm #8 of 2008 (H Hannah), storm #7 of 2010 (MH Earl), storm #8 of 2010 (TS Fiona), and storm #11 of 2011 (MH Katia), were each an August TC of at least TS intensity that were also of at least TS intensity into the month of September as well. Each storms respective "September" maximum intensity is listed in parenthesis.



This is a visible satellite image of the most intense "August" TC to have ever been observed anywhere within the Atlantic Basin. At the time of this satellite image (around 955 am EDT on August 7, 1980), Hurricane "Allen" was near its peak intensity-with a maximum sustained wind (MSW) of 190 mph and a lowest barometric pressure (BP) of 899 mb. Image courtesy of "NOAA".

ALL U.S. TROPICAL STORM LANDFALLS:

Note: These totals include all U.S. land falling TCs of at least Subtropical or Tropical Storm intensity.

5 = 2004 (2 H/1 MH).

4 = 1955 (1 H/1 MH).

3 = 1856 (1 H/1 MH) and 1881 (1 H).

2 = 1871 (1 H/1 MH), 1879 (1 H/1 MH), 1880 (1 H/1 MH), 1885 (1 H), 1886 (1 MH), 1887 (1 H), 1893 (1 H/1 MH), 1895 (1 H), 1898 (2 H), 1899 (1 H, TS July/1 MH), 1909 (1 H), 1911 (2 H), 1915 (1 H/1 MH), 1916 (1 MH), 1918 (1 H/1 MH), 1928 (1 H), 1932 (1 MH/1 H Sept.), 1933 (1 H/1 H July, Aug.), 1940, 1942 (1 H/1 MH), 1944 (1 H), 1947 (1 H), 1949 (1 H/1 MH), 1950 (1 H), 1953 (1 H), 1964 (1 H), 1976 (1 H), 1983 (1 MH), 1985 (1 H), 1988, 1995 (1 H), 1998 (1 H), 1999 (1 MH), 2003, and 2008.

1 = 1851 (MH), 1852 (MH), 1860 (1 MH), 1861, 1865, 1867, 1869, 1888 (1 MH), 1890, 1891, 1894, 1901, 1910, 1924, 1926 (MH), 1927, 1936, 1937, 1938, 1939, 1945, 1952, 1954 (MH), 1957, 1958, 1962, 1969 (MH), 1970 (MH), 1971, 1975, 1978, 1980 (MH), 1981, 1986, 1987, 1989, 1991, 1992 (MH), 1993 (MH), 1994, 2001, 2002, 2005 (MH), 2006, 2009, and 2011.

0 = 1853, 1854, 1855, 1857, 1858, 1859, 1862, 1863, 1864, 1866, 1868, 1870, 1872, 1873, 1874, 1875, 1876, 1877, 1878, 1882, 1883, 1884, 1889, 1892, 1896, 1897, 1900, 1902, 1903, 1904, 1905, 1906, 1907, 1908, 1912, 1913, 1914, 1917, 1919, 1920, 1921, 1922, 1923, 1925, 1929, 1930, 1931, 1934, 1935, 1941, 1943, 1946, 1948, 1951, 1956, 1959, 1960, 1961, 1963, 1965, 1966, 1967, 1968, 1972, 1973, 1974, 1977, 1979, 1982, 1984, 1990, 1996, 1997, 2000, 2007, and 2010.

Note: Storm #2 of 1899 also made a U.S. landfall as a TS in July, as well as a H here in August.

Storm #3 of 1932 made landfall during the month of August as a TS, then made a subsequent landfall as a H during the month of September.

Storm #5 of 1933 was a H that made landfall in the U.S. during both the month of July and August.

Storm #3 of 1953 was a TS that made landfall during the months of August and September, respectively.

Hurricane Elena of 1985 impacted the U.S. coastline with TS-force conditions in August, before making a direct H landfall during the following month of September.

H Dennis of 1999 impacted the U.S. coastline with TS-force conditions in August, before making a direct U.S. landfall during the following month of September, as a TS.

ALL U.S. HURRICANE LANDFALLS:

3 = 2004 (1 MH).

2 = 1856 (1 MH), 1871 (1 MH), 1879 (1 MH), 1880 (1 MH), 1893 (1 MH), 1898, 1899 (1 MH), 1911, 1915 (1 MH), 1918 (1 MH), 1933 (1 July/Aug.), 1940, 1942 (1 MH), 1949 (1 MH), and 1955 (1 MH).

1 = 1851 (MH), 1852 (MH), 1860 (MH), 1861, 1869, 1881, 1885, 1886 (MH), 1887, 1888 (MH), 1891, 1895, 1901, 1909, 1916 (MH), 1924, 1926 (MH), 1928, 1932 (MH), 1938, 1939, 1944, 1945, 1947, 1950, 1952, 1953, 1954 (MH), 1964, 1969 (MH), 1970 (MH), 1976, 1980 (MH), 1983 (MH), 1985, 1986, 1989. 1991, 1992 (MH), 1993 (MH), 1995, 1998, 1999 (MH), 2005 (MH), and 2011.

Note: Storm #2 of 1899 made a U.S. landfall as a TS in July, as well as a H in August. Also, Storm #5 of 1933 was a H that made landfall in the U.S. during both the months of July and August, respectively.

ALL U.S. MAJOR HURRICANE LANDFALLS:

1 = 1851, 1852, 1856, 1860, 1871, 1879, 1880, 1886, 1888, 1893, 1899, 1915, 1916, 1918, 1926, 1932, 1942, 1949, 1954, 1955, 1969, 1970, 1980, 1983, 1992, 1993, 1999, 2004, and 2005.



This is a visible satellite image of the most intense TC to ever make a U.S. landfall during the month of August. At the time that this particular satellite image was taken (2240Z on 8/16/69), H "Camille" was a rapidly intensifying and powerful category five H-with a MSW of 160 mph and a lowest barometric pressure of 905 mb. By the time H Camille ultimately came ashore-around 1030 pm CDT on August 17, 1969, she had a MSW of 190 mph and a lowest barometric pressure of 909 mb. As a result, H Camille is also the second most intense hurricane to have ever been known to make a landfall in the U.S.

FASCINATING FACTS:

1) All Atlantic Basin Tropical Storms:

a) Total number of Atlantic basin tropical storms: There were a total of 374 TS or STS systems that developed in the Atlantic basin during the 161 year period of 1851-2011. This total includes 5 "July" tropical cyclones that achieved TS intensity (for the first time) during the month of August. Of those five, 4 achieved hurricane intensity-two of which went on to become major hurricanes. In all, these figures equate to 2.32 August TC's per season, on average.

Also, there were 22 "July" TC's of either TS or H intensity that at least retained TS intensity into the month of August. Two of these "July" storms (storm #1 of 1915 and storm #2 of 1926) went on to achieve hurricane intensity in the succeeding month of August-with the 1926 storm becoming a MH shortly thereafter. Moreover, 1 other of these July TC's (storm #5 of 1933) actually regained its previous H intensity in the subsequent month of August, as well.

Furthermore, 20 of the aforementioned 369 "August" STS or TS systems went on to achieve hurricane intensity in the succeeding month of September. Of those twenty, 10 became "major" hurricanes shortly thereafter. Another 21 of the 369 "August" storms were hurricanes that achieved MH intensity in the succeeding month of September.

There were also 2 additional "August" TC's that didn't achieve TS intensity until the succeeding month of September. They would both ultimately achieve H intensity in September-with one of them becoming a "major" hurricane, as well.

b) Total number of Atlantic basin hurricanes: There were a total of 227 TC's that achieved hurricane intensity during the month of August. These figures include six "July" TC's that reached H intensity during the month of August. This equates to 1.41 August H's per season, on average.

c) Total number of Atlantic basin "major" hurricanes: There were a total of 89 (possibly only 88) August TC's that achieved "major" hurricane (MH) intensity during the month of August-three of which were "July" TC's that reached this intensity for the first time during the month of August, as well. These figures would constitute a statistical mean of one August MH every 1.83 years-essentially, one every other year-on average.

d) The most intense August hurricane: Hurricane Allen holds the record as the most intense August hurricane for anywhere in the Atlantic basin. It was a category five hurricane with a MSW of 190 mph and a B.P. of 899 mb on August 7 at 18 UTC. Hurricane Camille is a close second. It also contained a MSW of 190 mph. However, it had a minimum central pressure slightly higher than Allen at 905 mb.

e) The most recent August tropical storm: There were seven separate tropical storms that developed during the 2011 H season. Two of the seven tropical storms (Irene and Katia) achieved hurricane intensity during the month of August-with Irene reaching Major hurricane intensity during the month, as well. TS Katia formed (achieved TS intensity) very late on August 29, 2011. It would go on to achieve a maximum intensity of 140 mph, while located about 350 nm due south of the Island of Bermuda, around 8 pm ADT on September 5. It would subsequently weaken and recurve to the N and NE-staying well east of Bermuda.

f) The most recent "August" hurricane: H Katia of August 2011 is also the most recent TC of hurricane intensity to develop in the Atlantic basin. It became a H at 8 pm ADT on August 31.

g) The longest period without an "August" tropical storm: There have only been two periods of consecutive years without a TC developing anywhere in the Atlantic basin, during the month of August. They were 1904-1906 and 1919-1924. In addition, only 19 of the 161 hurricane seasons (11.8%) in the historical record, didn't have a TS form during the entire month of August.

h) The most tropical storms to develop in one season: The 2004 North Atlantic basin hurricane season was the most prolific for "August" TS formations. There were a total of 8 TC's that achieved TS intensity during the month of August. One of these was TS Alex which was a July TC that didn't achieve TS intensity until the month of August.

i) The most hurricanes to develop in one season: The 1893 Atlantic basin hurricane season holds the record for spawning the most TC's of hurricane intensity-in August-with 5.

j) The most "major" hurricanes to develop in one season: The 1886 and 1893 seasons each spawned 3 MH's during their respective seasons.

2) All U.S. Tropical Storm Landfalls:

a) Total number of U.S. tropical storm strikes: There were a total of 131 August TS or STS systems that made a U.S. landfall (or strike) during the aforementioned 161 year period. This equates to one August TS landfall (or strike) per 1.23 years. Moreover, a full 35.1% of all Atlantic Basin storms made landfall in the U.S. This is a smaller ratio of TC development to TC landfalls in the U.S. compared to that of the previous two months. This is a reflection of the primary breeding grounds (for this time of year) extending farther eastward across the Atlantic Ocean-all the way to the African coastline by the end of the month.

b) Total number of U.S. hurricane strikes: There were 78 hurricanes that made a direct strike on the U.S. coastline during the month of August. This equates to one land falling August hurricane every 2.06 years. Furthermore, 34.4% of all Atlantic Basin hurricanes struck the U.S. coastline.

It is important to note that the 1933 August hurricane also made a U.S. landfall in "July" as well. Consequently, this particular H is accounted for in both respective monthly totals of U.S. H landfalls.

c) Total number of "major" U.S. hurricane strikes: There were 29 "major" hurricanes that made landfall in the U.S. during the month of August. 8 of these made landfall at category four intensity or greater. They are the 1856 "Last Island" La. category four storm, 1886 "Indianola" TX. category four, 1915 "Galveston" TX. category four, 1916 S. TX. category four, 1932 "Freeport" TX. category four, 1969 category five hurricane Camille (La., MS.), 1992 category five hurricane Andrew (S. Fl.), and 2004's hurricane Charley (SW Fl.). These statistics equate to a "major" U.S. land falling hurricane every 5.55 years, a land falling category four or greater hurricane every 20.13 years, and a land falling category five once every 80.5 years, respectively.

d) The most intense U.S. TC landfall: Hurricane Camille of 1969 currently holds the record as the most intense TC to make a U.S. landfall during the month of August. It brushed the extreme SE tip of La. (near Grand Isle) before barreling ashore as a 190 mph/909 mb category five hurricane near Pass Christian, Mississippi.

e) The most recent U.S. hurricane strike: Hurricane Irene is the most recent hurricane to have made landfall on the U.S. shoreline during the month of August. It made landfall just W of Cape Lookout, N.C. at 8 am EDT on August 27, 2011. At landfall, it was a very large category One hurricane with a MSW of 85 mph and a BP of 952 mb.

f) The most recent U.S. tropical storm strike: Hurricane Irene of August 2011 is also the most recent TC of either TS or H intensity to make a U.S. landfall.

g) The longest period without an "August" U.S. tropical storm strike: The three longest periods of consecutive years without a land falling U.S. TS (in August) are 1872-1879, 1902-1908, and 1919-1924.

h) The most tropical storms to make a U.S. landfall in one season: The 2004 season holds the record for the most land falling tropical storms for the month of August-with 5.

i) The most hurricanes to make a U.S. landfall in one season: The 2004 season also leads the way with 3 land falling U.S. hurricanes as well. One of those was a land falling category four hurricane (Charley).

j) The most "major" hurricanes to make a U.S. landfall in one season: There have been 30 respective seasons that have produced a MH landfall along some portion of the U.S. shoreline, during the month of August.

FUTURE BLOG ENTRIES:

I will continue to provide an updated blog entry (similar to this one) for all other respective months of a calendar year. Thus, my next blog entry will likely be on "September" TC activity for the period of 1851-2011.

As always, thank you so much for taking the time to read and/or post in my blogs. I hope each one of you have a great rest of the day!:)

Most sincerely,
Tony

Hurricane History

Updated: 9:10 AM GMT on February 04, 2013

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