January 4-5, 2009 Storm Statistics

Readings From Weather Bus.com:

First Measurable Rain Time: January 4, 2009 at 11:30am
Last Measurable Rain Time: January 5, 2009 at 7:30am
Storm Total: 0.22in.
Max Rain Rate: 0.79in/hr @ 7:17am on January 5th

The first storm system of the year 2009, moved through the region on January 4th and 5th, which brought light to moderate rainfall to the valley and snow to the higher elevations of Arizona. With a moist surface from the rainfall and rapidly clearing skies behind the system, fog (dense in some locations) developed during the morning hours on January 5th. The image to the left shows the fog forming at the base of the Superstitions around 8:40am, before eventually developing into most locations in Apache Junction / Gold Canyon, reducing visibility to slightly less than a mile.

A trough of low pressure and associated cold front moved through the valley during the mid/late morning hours on January 4th, which brought light rainfall to the area throughout the afternoon and evening. The first of the showers moved into Apache Junction / Gold Canyon around 11:30am, with rainfall coming to an end by 7:45pm. This portion of the storm system left our location with a rain total of 0.09in., with a peak rain rate of 0.36in./hr. occurring at 11:35am. An additional piece of energy brought a quick (isolated) round of heavier showers into the region between 6:45am and 7:30am, with a peak rain rate of 0.79in./hr. occurring at 7:17am.. With 0.12in. of rainfall on January 4th and 0.10in. on the 5th, the overall storm total was 0.22in..

the public. Weather Bus.com thanks you for your reports! (Reports are ordered from newest to oldest. Times are in EST.)Below are rain totals reported to us by

Location: E. end of Silly Mtn.
Report Time: 5th of January 2009 9:16PM
Reporter: Robert
Rain Total: ~ 0.30in.
Comments: Slow intermittent rain from evening of the 4th to mid morning of the 5th.

Location: 200 yards east of Freestone Park in Gilbert
Report Time: 5th of January 2009 11:02AM
Reporter: Ken
Rain Total: 0.10in.

(The above rain totals were reported to us by the public. The accuracy of these reports is unknown.)

We thank you again for your reports! If it rained at your location, let us know by using the menu toward the top of the page (Public Reports --> Rain Reports). Your report will be added to this page.

This storm brought cold air from the north into the region, which allowed for a decent amount of snowfall at locations above about 5,500 feet. The visible satellite image to the right/above, taken on January 6th at 7:45am, shows the amount of snow coverage in the higher terrain of northern/eastern Arizona, as well as portions of northwest New Mexico.

Below is the water vapor satellite loop from January 2nd at 5pm through January 5th at 11pm, in six-hour intervals, showing the storm system develop in the Pacific and then move through the state.