Weather Banter - View Single Post - Hurricane Ophelia has similar pattern to Katrina

Harold Brooks

In article .com,
says...
St. Helens erupted in May of 1980 and the largest hurricane of that
year was Allen

Pinatuba erupted June of 1991 and the largest hurricane of that year
was Bob

After reading the history of the hurricane seasons for the early 1980s
and the years around 1991, I believe the volcanic eruptions made those
hurricane seasons of 1980 and 1991 less destructive than if no eruption
had occurred.

That's pretty unlikely. What's the explanation for 1982, 1983, 1984,
1986, 1987, 1993, and 1994 having less intense hurricanes than 1980 or
1991?

The ash of Pinatuba and St. Helens was not concentrated over the
Atlantic where hurricanes are spawned, so the volcanoes only
ameliorated the hurricane formation. Most of the 1980 hurricanes stayed
out at sea and were downgraded to tropical storms.

When Pinatuba occurred the hurricane season in the USA was altered in
path in that Bob meandered up north. But 1991 hurricanes were weak
compared to 1992.

Debatable. Andrew was the strongest of the two years, but the next two
strongest ones, Claudette (115 kt maximum) and Bob (100 kt) were both
1991 hurricanes. Bonnie and Charley (both 95 kts in 1992) were 4th and
5th, Grace (1991-85 kts) was 6th. Not much difference there, if any. 8
storms reached tropical storm status (one of them unnamed) in 1991 and 6
did in 1992 (with another subtropical storm in the list).

The aim of Aluminium Sequin placed in orbit is not to alter the course
or path of hurricanes but to thwart the formation of hurricanes.

And your plan for moving all that heat from the tropics northward is?

Both St. Helens and Pinatuba had an effect on the hurricane season for
their respective years but that effect was a minor effect simply
because the volcanic ash was not large over the Atlantic basin where
hurricanes are formed.

Little, if any, of Mt. St. Helens output was still in the atmosphere by
the main part of hurricane season. It was a low sulfur eruption and the
blast was horizontal, so not even much of the tephra got into the
stratosphere, where residence times are longer.

--
Harold Brooks
hebrooks87 hotmail.com