STP 07-20-2016: Monsoonal Moisture Kept the Faucet Turned On

Issue Date: Wednesday, July 20th, 2016
Issue Time: 9:00 AM MDT

Summary:

A strong upper-level high over the south-central US and an upper-level low spinning off the coast of the Pacific NW kept Colorado firmly underneath southwest flow aloft. This continued to supply the atmosphere overhead with plenty of moisture, especially over and near the High Country. Storms developed initially over the mountains, moving generally to the northeast with the mean flow, leaving most of southeast Colorado dry. Locally heavy rain fell underneath stronger storms, and led to the issuance of a few flood advisories/flash flood warnings. Flash flooding was reported yesterday, and those reports are as follows:

Extensive street flooding, some at depths of over 1 foot, along with numerous impassable roadways and intersections, was reported across metro Denver.
2 miles to the WSW of Denver, Santa Fe Drive and Iowa Avenue were impassable under a foot of water.

Unfortunately, one fatality from lightning was reported in Arvada, and another person was struck (and in critical condition) at the El Paso County Fair in Calhan. For a complete look at 24-hour precipitation totals, please take a look at the Storm Total Precipitation map below.

STP_20160720