September 1, 2007 Storm Statistics

Readings From Weather Bus.com:

First Measurable Rain Time: September 1, 2007 at 4:47pm
Last Measurable Rain Time: September 1, 2007 at 5:45pm
Storm Total: 0.82in.
Max Rain Rate: 4.68in/hr
Peak Wind Gust: NE @ 47mph
Total Lightning: 47,866

Comments:
Strong to Severe Thunderstorms formed along the rim, around 1:00pm, and were moving to the southwest, off the rim toward the valley. By 3:30pm, the area of showers and thunderstorms was moving into extreme eastern Maricopa county, with storms also developing just to the North of and in North Central Pinal County, east of Gold Canyon. Storms, by 4:25pm, had moved in and developed just to the North of the Superstitions, as well as a fairly strong line of thunderstorms to the east of Gold Canyon. At 4:32pm, a thunderstorm began forming directly over the west portion of Gold Canyon. By 4:45pm, this thunderstorm strengthened into a strong thunderstorm producing heavy rainfall, small hail and gusty winds. During this same time, we recorded the first measurable rain at 4:47pm, and small hail occurred at 4:53pm. At the same time this thunderstorm was affecting the area, a Severe Thunderstorm formed just to the North of the Superstitions and was moving toward the Southwest. At around 4:57pm, this Severe Thunderstorm was moving over the top of the Superstitions and into Gold Canyon. About three minute later, at 5:00pm, very strong winds moved through the area, with winds sustained at around 35mph for several minutes with gust into the mid 40's. The peak wind gust occurred at 5:01pm, from the NE at 47mph. Shortly after the wind moved through extremely heavy rainfall occurred, with a peak rain rate of 4.68in/hr. occurring at 5:10pm. During this time period as well, visibility dropped at times to less then 500ft., due to the heavy rain. By 5:15pm, 23 minutes after the first measurable rainfall, we had recorded 0.59in. of rainfall! Heavy rain continued until around 5:25pm, with continued light rainfall until around 5:45pm. Another round of small hail was also noted at 5:22pm.The storm total was 0.82in. in less then an hour. After the storm moved through the area, it continued to move toward the southwest but it weakened considerably.
(To see what was described above on Doppler radar, click on the first radar image below, courtesy of Plymouth State University.)

The automated rain gauge on Kings Ranch Road reported 0.51in. of rainfall. Mike, near Falling Star and Cloud View in Gold Canyon, reported 1.15in. of rainfall. He also reported strong winds from the east which started around 4:45pm, with heavy rain and washes flowing quickly. Also reported, was the strong wind causing some limb damage to trees. Donna, reported that on Mountain View Road, roof tiles were blown off, along with trees being blown down. She also reported that their Gazebo fell down, with rain damage occuring as well. Thank you for your reports! The above rain totals were reported to us by private individuals. The accuracy of these reports is unknown. If it rained at your location, let us know by clicking on the link at the top of the page titled "Public Rain/Weather Reports". Your report will be added to this page.

Due to strong winds, numerous damage reports were received by the National Weather Service in Phoenix. Below, are some of those reports:
..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..


0511 PM     TSTM WND DMG     APACHE JUNCTION         33.40N 111.55W
09/01/2007                   PINAL              AZ   PUBLIC

            ESTIMATED WIND GUST 60 MPH WITH ROOF BLOWN OFF WOOD
            STRUCTURE AT U.S. HIGHWAY 60 AND GOLDFIELD RD.


0515 PM     DUST STORM       MESA                    33.42N 111.74W
09/01/2007                   MARICOPA           AZ   TRAINED SPOTTER

            ESTIMATED WIND GUST 40-45 MPH AND VISIBILITY LESS THAN
            300 FT DUE TO BLOWING DUST AT SOSSAMAN RD. AND BASELINE
            RD.


0525 PM     TSTM WND DMG     APACHE JUNCTION         33.40N 111.55W
09/01/2007                   PINAL              AZ   PUBLIC

            POWER LINES DOWN.


0531 PM     DUST STORM       GILBERT                 33.33N 111.76W
09/01/2007                   MARICOPA           AZ   TRAINED SPOTTER

            VISIBILITY LESS THAN 1/4 MILE DUE TO BLOWING DUST AT
            HIGLEY RD. AND CHANDLER HEIGHTS RD.


0552 PM     DUST STORM       CHANDLER                33.29N 111.87W
09/01/2007                   MARICOPA           AZ   PUBLIC

            VISIBILITY LESS THAN 1/4 MILE DUE TO BLOWING DUST AT
            ARIZONA AVE. AND CHANDLER HEIGHTS RD.


0800 PM     TSTM WND DMG     GILBERT                 33.33N 111.76W
09/01/2007                   MARICOPA           AZ   NWS EMPLOYEE

            40 FOOT CONSTRUCTION TRAILER OVERTURNED ON ITS SIDE. 18
            INCH DIAMETER TREE BLOWN OVER. 20-30 TREES 8-10 INCHES IN
            DIAMETER INSTANTLY SNAPPED OFF AT TRUNK LEVEL. ALL
            HAPPENED NEAR THE INTERSECTION OF CHANDLER BLVD AND
            COOPER ROADS IN GILBERT AZ.

With the extremely heavy rainfall, all washes throughout the area were running at just about full capacity. At the end of this report, you can view a short video to see how fast the washes were running. The picture/movie are of a wash that was flowing at around 2.5ft to 3ft in depth, which is way more then it would take to float a car. Always, remember, Turn Around Don't Drown, it only takes one to two feet of flowing water to float a car!

With the heavy rainfall, the temperatures dropped considerably in a very short period of time. At 4:30pm, the temperature was 105.7°F, and by 5:30pm, the temperature was a remarkable 70.1°F! That is a 35.6°F drop in temperature in just one hour! Also, the low temperature of 70.1°F, is the lowest temperature was have recorded since June 13th! To the right is the temperature graph showing the dramatic temperature drop.

Since July 8th, the start of the 2007 Monsoon Season, we have recorded 4.35in. of rain, with 1.35in. (31%) of that occurring in the past four days, August 29th thru September 1st.


Storm Pictures Taken on September 1, 2007: (Click Pictures To Enlarge)

September 1, Radar Loop From 4:20pm to 5:45pm
September 1, Visible Satellite Taken At 5:00pm

Short Video Taken on September 1, 2007 @ 5:57pm
May take a moment to load.

Taken on September 1, 2007 @ 6:15pm