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October 5th Hailstorms in Phoenix
Updated: 8:15 AM Oct. 21, 2010
loop of a hail storm moving across Phoenix
Strong, veering winds with height and an unstable airmass, both due to an approaching low pressure system, caused many supercell thunderstorms to develop across central Arizona during the morning and afternoon hours on October 5, 2010. Several of these supercells tracked over the Phoenix Metropolitan Area, dropping large hail and causing extensive damage.
picture of hail
Did you capture any pictures of the hail? If so, please send them to us! Include your name, location and time (please be as specific as possible), and your consent to let us share your picture on our website (you will be given credit). Pictures that include common objects (such as the one shown here) are most helpful.
How does the hail that fell on October 5th compare to past hail storms? Since 1950, the largest hail stone to fall in Arizona was 4.5" in diameter. This occurred near Mayer, AZ on September 28, 1995. The 3" diameter hail that fell in Phoenix on October 5, 2010 was the largest hail ever reported in Maricopa County and the Phoenix Metro Area. Some of the largest hail stones to fall in the state are listed in the table below.
14.50"09/28/1995Yavapai (Mayer)
24.00"03/12/1958Graham (E of Safford)
33.00"10/05/2010Maricopa (Phoenix)
3.00"08/28/2002Pima (Tucson)
3.00"07/20/1998Coconino (SE of Flagstaff)
3.00"06/13/1955Gila (NW of Payson)
72.75"08/15/2003Yavapai (Black Canyon City)
2.75"09/15/1999Yavapai (NE of Prescott)
2.75"09/28/1995Pima (Aravica)
2.75"07/25/1990Maricopa (Nr Cave Creek)
112.50"10/05/2010Maricopa (Scottsdale)
2.50"10/02/1984Gila (Nr Globe)
2.50"09/17/1971Gile (SE of Payson)

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