Flash Flood Prediction Program

-	Upper-level high pressure remains anchored over the Four Corners on Tuesday, with weak NNW flow aloft over Colorado. Slightly warmer and drier air will arrive this afternoon, which will help temperatures rebound back to around 90, with plenty of sunshine expected.
-	Similar to previous days, showers and thunderstorms will fire over the mountains and foothills early this afternoon, a few of which will track onto the adjacent plains late this afternoon through early evening. Storms are expected to be less numerous and weaker than previous days, but stronger storm cells may produce moderate to locally-heavy rainfall.
-	Today's showers and storms will track to the SSE at around 15-20mph, with the best chance for a storm over the District occurring between about 4:00pm-8:00pm

STORM RAINFALL POTENTIAL AND DURATION: Weak to moderate showers and thunderstorms will produce rainfall between 0.10-0.30" in 10-30 minutes. Stronger thunderstorms could produce rainfall between 0.30-0.60" in 10-30 minutes.

WORST CASE SCENARIO: A strong thunderstorm anchored to a convergence boundary results in rainfall up to 2.00" in 30-60 minutes.

A LOOK AHEAD: High pressure flattens and nudges E on Wednesday, while afternoon temperatures climb into the low to mid 90s. A weak disturbance will lead to a slight uptick in shower and thunderstorm activity, with moderate to locally-heavy rainfall again possible.

Location	Prime Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	400 PM TO 800 PM	0.1" (70%) to 0.4" (40%) to 0.6" (10%)	LOW
Arapahoe	400 PM TO 800 PM	0.1" (70%) to 0.4" (40%) to 0.6" (10%)	LOW
Boulder	400 PM TO 800 PM	0.1" (75%) to 0.4" (45%) to 0.6" (15%)	LOW
Broomfield	400 PM TO 800 PM	0.1" (70%) to 0.4" (40%) to 0.6" (10%)	LOW
Denver	400 PM TO 800 PM	0.1" (70%) to 0.4" (40%) to 0.6" (10%)	LOW
Douglas	400 PM TO 800 PM	0.1" (75%) to 0.4" (45%) to 0.6" (15%)	LOW
Jefferson	400 PM TO 800 PM	0.1" (75%) to 0.4" (45%) to 0.6" (15%)	LOW
Foothills above 6500ft
Boulder	300 PM TO 800 PM	0.1" (80%) to 0.4" (50%) to 0.6" (20%)	LOW
Douglas	300 PM TO 800 PM	0.1" (80%) to 0.4" (50%) to 0.6" (20%)	LOW
Jefferson	300 PM TO 800 PM	0.1" (80%) to 0.4" (50%) to 0.6" (20%)	LOW

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.