STP 05-27-2016: Most Active Day Of The Young Season

Issue Date: Friday, May 27th, 2016
Issue Time: 9:10 AM MDT


It did not take long before a variety of active weather developed across Colorado on Thursday. Most of the focus was east of the Continental Divide, where upslope flow, adequate moisture and impressive dynamics combined to produce several waves of thunderstorms. Heavy rainfall, hail, wind, tornadoes, and yes, even snow (up to several inches in terrain above 9,000 feet) was observed across a wide swath of the state.

The highest rainfall totals of the 2016 warm season were tallied yesterday. Fortunately, short-term rainfall rates were fairly limited, ranging from about 0.5 inches per 30 minutes in the Front Range area to perhaps 0.7 inches in 30 minutes farther south and east. However, many locations experienced several hours of rainfall. Thus, in the 24-hour period ending early this morning, many locations in Washington, Arapahoe, Douglas, Adams, Elbert and El Paso counties received over 2 inches of rainfall.

Many strong thunderstorms were also observed mainly across the Southeast Plains, Palmer Ridge and Northeast Plains. A half dozen tornado reports were received from Kit Carson and Cheyenne counties. Meanwhile, a whole slew of hail reports were also noted. Fortunately, most of the hail was about 1 inch or less in diameter, hopefully limiting the damage that it may have caused. Flooding-wise, no official reports were received but 3 areal flood advisories were issued by area NWS offices, suggesting at least some minor field flooding was present. The map below, from Iowa State University, summarizes all of the warnings and advisories issued yesterday (yellow = thunderstorm, red = tornado, green = flood).


For specific rainfall estimates in your area, please check our STP map below.