Issue Date: Friday, May 1st, 2015
Issue Time: 9:00 AM MDT
Summary:
An upper-level disturbance helped kick off an afternoon of isolated-to-scattered showers/thunderstorms across northern Colorado, mainly east of the Continental Divide. The presence of increasing moisture at the surface, instability, and favorable wind shear led to the development of severe strong-to-severe thunderstorms across the Urban Corridor and Northeast Plains regions. Moderate-to-heavy rain fell from thunderstorms, in addition to a plethora of severe weather impacts. A few of the more significant severe storm reports include:
1.75 inch hail: S of Akron (Washington County), 6 miles SSE of Denver (Denver County)
1.5 inch hail: 1 mile W of Platner (Washington County), SE of Akron (Washington County), 2 miles NE of Denver (Denver County), 2 miles ESE of Denver (Denver County)
Tornado: Akron (Washington County), S of Akron (Washington County), 10 miles NW of Last Chance (Adams County)
Elsewhere, during the evening and overnight hours, isolated showers developed over the higher terrain of northwestern Colorado. These showers produced mainly light rain and gusty winds.
Rainfall winners, according to CoCoRaHS (reports as of 7:00 AM MDT):
Yuma County: 0.82 inches
Phillips County: 0.79 inches
Sedgwick County: 0.74 inches
Adams County: 0.56 inches
Weld County: 0.45 inches
No flash flooding occurred yesterday. For a look at 24-hour precipitation, please see the STP map below. It is important to note that hail contamination will be present in the STP map, so rainfall totals are likely lower than what is shown in most locations.
