Issue Date: Monday, May 9th, 2016
Issue Time: 9:00 AM MDT

Summary:

The upper-level low that has been responsible for the latest wet period continued its trek northeastward across Colorado yesterday, providing support for another day of unsettled weather. Showers and garden-variety thunderstorms dotted the state yesterday, with the main impacts being light-to-moderate rainfall and gusty winds. A few of the stronger storms, relatively speaking, produced brief periods of heavy rainfall, but not enough to create any flooding issues. Snow levels throughout the day were around 10,000 feet, dropping a bit lower overnight, and a few of the mountain passes are experiencing winter driving conditions this morning. Scattered showers continue this morning across the High Country, bringing both rain to the valleys and snow to the higher elevations.

Rainfall winners, according to CoCoRaHS (reports as of 7:00 AM MDT):

Routt County: 0.97 inches
Moffat County: 0.93 inches
Mesa County: 0.70 inches
Larimer County: 0.65 inches
Grand County: 0.60 inches

No flash flooding occurred yesterday. For a look at 24-hour precipitation, please see the STP map below.

Issue Date: Sunday, May 8th, 2015
Issue Time: 9:00 AM MDT

Summary:

Showers and thunderstorms dotted most of the state yesterday, with a few becoming severe over the Northeastern Plains, Palmer Ridge, and Urban Corridor. Moderate-to-heavy rainfall attended the strongest storms across northern Colorado, but was not enough to cause any flash flooding issues. Street/field ponding was a likely result, and a small stream flood advisory was issued for portions of Morgan, Washington, and Adams Counties. According to CoCoRaHS, the big winners for rainfall reports yesterday are as follows:

Sedgwick County: 1.50 inches
Phillips County: 1.36 inches
Larimer County: 1.29 inches
Weld County: 1.27 inches

Now, let’s take a look at those severe storm reports…

Hail Reports (1.5 inches or Greater):
2.50 inches: 1 mile NW of Strasburg (Adams County), 4 miles NW of Alvin (Yuma County)
1.75 inches: 6 miles SE of Holyoke (Phillips County), 2 miles S of Strasburg (Arapahoe County), 3 miles WSW of Country Gardens (Arapahoe County)
1.50 inches: 1 mile WNW of Strasburg (Arapahoe County), 2 miles NW of Strasburg (Adams County), 3 miles N of Black Forest (El Paso County)

Tornado:
Morgan County: 13 miles W of New Raymer, 10 miles N of Wiggins
Weld County: 5 miles W of Wiggins
Yuma County: 4 miles N of Heartstrong, 5 miles NNE of Eckley, 4 miles SSW of Wray, 3 miles S of Wray, N Wray, 15 miles N of Wray, 2 miles of N Wray, 7 miles N of Wray, 10 miles NNE of Wray

Please see the STP map below for a look at precipitation totals from the last 24 hours. Keep in mind that totals associated with severe storms are likely to be inflated due to hail contamination.

Issue Date: Saturday, May 7th, 2015
Issue Time: 9:00 AM MDT

Summary:

Deep south/southwesterly flow aloft in advance of the upper-level low overspread increasing moisture across Colorado. This moisture was the fuel for scattered-to-widespread showers and thunderstorms across the High Country and scattered activity across the Urban Corridor, Raton Ridge and Northeast Plains. In general, activity east of the mountains ended from south to north during the late evening hours. A few scattered showers continued across the far Northeast Plains until about 2 AM before exiting the state to the north/northeast.

After 10 PM, redevelopment of isolated showers/weak thunderstorms developed over the Raton Ridge in association with a weak mid-level disturbance. Light rain and gusty winds were the main result. This activity came to an end ~1 AM.

The most widespread showers/thunderstorms occurred across the High Country, where the best overlap of moisture, instability, and lift occurred. Activity was ongoing yesterday morning in isolated fashion, becoming more scattered, and eventually widespread, through the afternoon and evening hours. Scattered showers/weak thunderstorms continue this morning across the western third of the state.

No flash flooding was reported yesterday. Please see the STP map below for a look at precipitation totals from the last 24 hours.

Issue Date: Friday, May 6th, 2016
Issue Time: 9:00 AM MDT

Summary:

As the upper-level low continued to move onshore California, south/southwesterly flow aloft brought increasing moisture to western Colorado yesterday. Meanwhile, the upper-ridge axis remained over eastern Colorado, keeping the day dry and warm for areas east of the mountains. Isolated-to-scattered showers and thunderstorms dotted the higher terrain and adjacent valleys of the High Country throughout the afternoon and evening hours, and showers have continued into this morning across the western third of the state.

Rain rates remained on the light side, so no flash flooding occurred yesterday. For a look at 24-hour precipitation, please see the STP map below.