Causes. Although doctors don't know what causes ITP, they know that it happens when your immune system -- your body's defense against disease -- doesn't work right. Your antibodies, which are supposed to attack infections, instead mistakenly destroy your blood platelets.
Although not as strong as the Asian monsoon, the cycle is typical of monsoon seasons worldwide. The monsoon season begins on June 15 and ends on September 30, but the storms peak between mid-July and mid-August. On average, about half of Arizona receives about half of its annual rainfall during the monsoon. However, rainfall can vary tremendously between distances of just a few miles.
While the moisture in Mexico is good for the monsoon in Arizona, we want the opposite in the Plains states to our east. Drought conditions favor the set up of the Bermuda High, which is a broad area high pressure that forms over the the eastern U.S. as the temperatures heat up into summer.