Earth Science Hurricanes

Discussion in 'Earth Science' started by JcMinJapan, Sep 3, 2004.

  1. JcMinJapan

    JcMinJapan Premium Member

    As is seem that we have Hurricane Frances bearing down on Florida in the United States, I think we should cover what exactly a hurricane is. :)

    A hurricane is actually, just a Tropical Cyclone with wind speeds more than 74 MPH and is located in the NorthEast Pacific Ocean east of the date line, the North Atlantic, or the South Pacific East of 160E.

    Now, if this same storm is locates in the Northwest Pacific Ocean and is west of the dateline is is called a Typhoon. Of course, it it is located in the SouthWest Pacific Ocean and is West of 160E or is in the SouthEast Indean Ocean and is East of 90E then it is called a severe tropical cyclone. To get even more confusing it is considered a Tropical Cyclone is if is in the SouthWest Indian Ocean or a Severe Cyclonic Storm if it is in the North Indian Ocean.

    Wow, that was a mouth full... ha ha Why not just one word for it. hmmmm Well for now, I will explain it by its proper name a Tropical Cyclone.

    A tropical cyclone is basically a low-pressure system over tropical or sub-tropical waters is is representative of a storm as well as haveing "cyclonic" winds circulating at the surface.
    Tropical cyclones with maximum sustained surface winds of less than 39 mph are called "tropical depressions"
    It is considered a Tropical storm once the winds are at least 39 mph.
    Once they hit over 74 MPH they are then assigned a name and are designated a Hurricane or other classification.

    [Edited on 3-9-2004 by JcMinJapan]
     
  2. JcMinJapan

    JcMinJapan Premium Member

    Hurricane Categories:

    Hurricanes are broken up into Several Categories:

    Category: 1
    Power: Weak
    Windspeed: 74 - 95 mph
    Expected Damage: Minimal damage to vegetation

    Category: 2
    Power: Moderate
    Windspeed: 96 - 110 mph
    Expected Damage: Moderate damage to houses

    Category: 3
    Power: Strong
    Windspeed: 111 - 130 mph
    Expected Damage: Extensive damage to small buildings

    Category: 4
    Power: Very strong
    Windspeed: 131 - 155 mph
    Expected Damage: Extreme structural damage

    Category: 5
    Power: Devastating
    Windspeed: Greater than 155 mph
    Expected Damage: Catastrophic building failures possible

    ref: LSU Educational Center
     
  3. Cinderloft

    Cinderloft Premium Member

    And appearently Frances may get enough of a surge to almost touch Cat 5.

    http://news.myway.com/top/article/id/424763|top|09-02-2004::19:26|reuters.html

    2.5 million told to flee. It is twice as wide as Charley. Tolls have been suspended and traffic is backed up with people trying to get out.