Sep 17, 2013 2:00 AM by Dave Hovde
Tropical moisture over the West produced the record rainfall in northern Colorado.
In recent weeks moist air forced uphill over the Front Range and foothills of the Rockies in assoication with a slow moving surface low over the four corners region and high pressure in the Central U.S. produced a flow forcing monsoon moisture north.
The cooperative weather observer in Boulder, Colorado reported that yesterday's rainfall was 1.94". This brought the monthly accumulation for september up to 16.69" and the year-to-date accumulation up to 29.65". The monthly accumulation far exceeds the previous September record of 5.50" in 1940. It also exceeds the all-time monthly accumulation of 9.59" in May 1995.
The year-to-date accumulation, 29.65", also establishes a new record annual precipitation accumulation at Boulder. The previous record for annual precipitation at the Boulder cooperative station was 29.43", set in 1995.
Weather records for Boulder, Colorado date back to 1893.
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