Time: 905 AM Wed June 2, 2021 Forecaster: Justin Brooks

Heavy Precipitation Outlook
Flash Flood Prediction Program

WARM AND SUNNY WITH A FEW ISOLATED FOOTHILLS RAIN SHOWERS/THUNDERSTORMS
-High-pressure will start to build today leading to generally dry conditions with a very slight chance for some isolated rain showers/thunderstorms along the foothills. High temperatures this afternoon will reach the mid to upper 70's on the plains with low 70's along the foothills.
-A few isolated rain showers/thunderstorms will initiate along the Continental Divide around midday, with a few of those storms moving eastward and onto the foothills this afternoon. N/NW winds aloft should help limit any storms from moving onto the plains as most storms will keep anchored to the higher terrain. Best chance for storms will be from 1-5pm with conditions drying out into the evening as skies clear into the overnight.
-Overnight will be mild, with temperatures dropping into the low 50's.
STORM RAINFALL POTENTIAL AND DURATION: Typical foothill rain showers will produce a trace-0.1" in 10-30 minutes. A weak thunderstorm will produce 0.1-0.2" in 10-30 minutes.

WORST CASE SCENARIO: An anchored foothill rain shower or moderate thunderstorm could produce 0.2-0.5" in 45-60 minutes.

A LOOK AHEAD: High-pressure will hold through the rest of the week with generally dry conditions although a few high-based storms with minimal precipitation cannot be completely ruled out. High temperatures will only increase through the weekend with 80's expected Thursday/Friday with highs around 90 degrees for Saturday. Saturday will also bring a chance for afternoon rain showers/thunderstorms although the threat for heavy rainfall looks minimal at this time.

Location Prime Time 30-Minute Rainfall
and % Probability
Message
Potential
Plains      
Adams 200 PM TO 600 PM
Trace (5%) to 0.1" (0%) NONE
Arapahoe 200 PM TO 600 PM
Trace (5%) to 0.1" (0%) NONE
Boulder 200 PM TO 600 PM
Trace (5%) to 0.1" (0%) NONE
Broomfield 200 PM TO 600 PM
Trace (5%) to 0.1" (0%) NONE
Denver 200 PM TO 600 PM
Trace (5%) to 0.1" (0%) NONE
Douglas 200 PM TO 600 PM
Trace (5%) to 0.1" (0%) NONE
Jefferson 200 PM TO 600 PM
Trace (5%) to 0.1" (0%) NONE
Foothills above 6500ft      
Boulder 100 PM TO 500 PM
Trace (20%) to 0.1" (10%) to 0.2" (5%) NONE
Douglas 100 PM TO 500 PM
Trace (20%) to 0.1" (10%) to 0.2" (5%) NONE
Jefferson 100 PM TO 500 PM
Trace (20%) to 0.1" (10%) to 0.2" (5%) NONE
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.
https://f2p2.udfcd.org/generator/