Summers in Phoenix are monsoon season. Monsoons are fast strong moving thunderstorms. They come quickly with strong winds, lightening, often dumping torrents of rain onto the dry desert.
When there is not enough moisture in the air for rain, the monsoon can take the form of a "haboob" or dust storm. I have never experience anything else like an AZ dust storm. In 2001, we were caught in one while driving back from California. Within minutes, the sky went from blue to dark grey, our car was buffetted back and forth with the winds & dust. Visibility went to nothing as we pulled to the side of the road. Having just moved to Arizona at the time and never having experienced a dust storm, it was definitely scary!
I found this video on youtube and wanted to share it with those of you not from this part of the country.
Besides the dust storms, the monsoons bring flash floods. The dry desert floor can only hold so much water from a monsoon. The excess finds it's way into dry creek beds or overflows the streams with fast moving water. Ordinarily, the flash floods occur in the more rural areas...areas with dry creek beds or small streams. This week we saw something unusual. One of the main freeways that runs through the valley was flooded when a monsoon moved through dropping close to two inches of rain in a very short period of time. The freeway was actually shut down and people were stranded on the freeway for hours!
Isn't this image amazing? (I found it on one of the news websites)
I photographed a storm moving by our house the other day. You can see by the contrast of the blue skies and the dark gray storm clouds just how quickly these storms can move. (These were taken as I stuck my camera lens through the view fence in my backyard)
And then of course, from the front yard, there was a rainbow...