Question Details

Will the NOAA 2011 Atlantic Updated Hurricane Season Outlook of  3-5 major (cat 3+) Hurricanes be correct?

Will the NOAA 2011 Atlantic Updated Hurricane Season Outlook of 3-5 major (cat 3+) Hurricanes be correct?

Asked by: hfl13 in General » Weather
Settled on 11/29/2011 18:39 Settled by Super Usergotmick
Winning option:s Total of 3 for 2011 Hurricane season:
http://www.accuweather.com/en/weather-news/noaa-finalizes-2011-atlantic-h/58359

Predictions

Background

Another market with gotmick´s design. Picture is cat 4 Earl from 2010.

NOAA's 2011 Atlantic Hurricane Season Outlook calls for a 65% chance of an above normal season, a 25% chance of a near-normal season, and a 10% chance of a below-normal season. See NOAA definitions of above-, near-, and below-normal seasons. The Atlantic hurricane region includes the North Atlantic Ocean, the Caribbean Sea, and the Gulf of Mexico.

This outlook reflects an expected set of conditions that is conducive to above-normal Atlantic hurricane activity. These conditions are based on three climate factors:

The tropical multi-decadal signal, which has contributed to the high-activity era in the Atlantic basin that began in 1995,
A continuation of above-average sea surface temperatures in the tropical Atlantic Ocean and Caribbean Sea (called the Main Development Region),
ENSO-neutral conditions most likely (no El Niño or La Niña), with lingering La Niña impacts into the summer.

In addition, several dynamical model forecasts of the number and strength of tropical cyclones generally predict an above normal season. Luckily the spread got smaller with the update so I decided for even odds.

The conditions expected this year have historically produced some active Atlantic hurricane seasons. Therefore, the 2011 season could see activity comparable to a number of active seasons since 1995. We estimate a 70% probability for each of the following ranges of activity during 2011:

12-18 Named Storms, (The number this market represents) updated 14-19
6-10 Hurricanes updated updated 7-10
3-6 Major Hurricanes updated 3-5
An ACE range of 105%-200% of the 1981-2010 median.

The seasonal activity is expected to fall within these ranges in 7 out of 10 seasons with similar climate conditions and uncertainties to those expected this year. These ranges do not represent the total possible ranges of activity seen in past similar years.

The official NHC seasonal averages are 11 named storms, 6 hurricanes, and 2 major hurricanes.

http://www.cpc.ncep.noaa.gov/products/outlooks/hurricane.shtml

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   hfl13

3 Ophelia (max cat 4)

   hfl13

2 Katia (max cat 4)

   hfl13

1 Irene (cat 3) chances for Katia

   hfl13

0 but Irene may help

   bernardo

The outlooks in a picture: http://www.cpc.ncep.noaa.gov/products/outlooks/figure1.gif

   bernardo

@kruijs: I do, if the approach to it is scientific, which I think applies to the NOAA. For example they try to accentuate what they can not do in the introduction to the press release: "This outlook is a general guide to the expected overall activity during the upcoming hurricane season. It is not a seasonal hurricane landfall forecast, and it does not predict levels of activity for any particular region." Don't discriminate sciences in their early stages :P It does no good to them if people think of them as an art.

And, fine, I'll be the supporter of the 70% probability :)

   hfl13

I just thought that gotmick left out the most intersting market and didn´t want to all the work myself. The first line is from me and I updated the NOAA numbers.

I changed the odds because 0-2 and 6+ are big enough areas that justified a higher odd IMO espially if they upgraded the numbers for named & hurricanes. Glad to give you the opportunity and by betting no I will give you another ;-)

   Super Userkruijs

you really consider "weather" a science

   bernardo

The background is a bit hard to read because quoted and self-written parts aren't distinguished. I don't understand why you chose even odds although the (scientific) publication you cite estimates a 70% chance. I feel bad for possibly profiting of this gap.
Speaking of science: I don't see any reason why "Weather" shouldn't be in the "Science" category.

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