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NHC Changes 2008

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  • Location: Dorset
  • Location: Dorset

    Sorry if this has already been mentioned elsewhere, but the time changes and color coding of disturbances are probably quite relavent.


    2. Changes for 2008

    Based on the success of the GTWO during the 2007 hurricane season, the results of the probabilistic genesis forecast verification, and comments from users, the following changes to the GTWO will be implemented during the 2008 hurricane season:

    The 2008 version of the GTWO will be issued four times per day.

    The 2008 version of the GTWO will include a three-tiered, color-coded, categorical genesis forecast:

    The issuance times for the TWO and GTWO will be changed to 0000, 0600, 1200, and 1800 UTC. In previous years, the Atlantic TWO was issued at 5:30 AM, 11:30 AM, 5:30 PM, and 10:30 PM, ET while the Pacific TWO's were issued at 4 AM, 10 AM, 4 PM, and 10 PM, PT.

    Atlantic GTWO

    New Issuance Time (EDT) New Issuance Time (EST)

    2:00 AM 1:00 AM

    8:00 AM 7:00 AM

    2:00 PM 1:00 PM

    8:00 PM 7:00 PM

    East Pacific GTWO

    New Issuance Time (PDT) New Issuance Time (PST)

    5:00 AM 4:00 AM

    11:00 AM 10:00 AM

    5:00 PM 4:00 PM

    11:00 PM 10:00 PM

    Examples of the new 2008 version of the GTWO can be viewed via the following URLs:

    View Atlantic Example – View Pacific Example

    Next: Explanation of the Graphical TWO

    New Graphic

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