Flash Flood Prediction Program

-	A low-pressure system has finally started to move eastward resulting in NW flow aloft today, combined with dew points in the low to mid 40's will result in a chance for showers and isolated thunderstorms this afternoon and evening, with any shower activity coming to an end later this evening.
-	Showers and thunderstorms will track from NW to SE today with the best chance for storm development between 12:00-8:00pm, with chances decreasing rapidly this evening as temperatures cool due to the loss of daytime heating.
-	The potential for heavy rainfall will be limited by weak instability today, however with an increase in surface moisture and/or training of showers/thunderstorms could bring the potential for brief moderate to heavy rain favoring eastern and southern portions of the District.

STORM RAINFALL POTENTIAL AND DURATION: Typical showers and weak thunderstorms will produce rainfall amounts of TR-0.2" in 10-30 minutes. An isolated stronger thunderstorm will be capable of producing rainfall of 0.2-0.5" in 10-30 minutes.

WORST CASE SCENARIO: A strong thunderstorm or training of thunderstorms results in rainfall of up to 1.0" in 45-60 minutes.

A LOOK AHEAD: High-pressure builds over the next several days resulting in more seasonable temperatures through the rest of the week with mostly dry conditions expected, although if there is enough surface moisture present a weak afternoon shower or thunderstorm can't be ruled out at this time.

Location	Prime Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	1200 PM TO 800 PM	Trace (60%) to 0.2" (40%) to 0.5" (20%)	LOW
Arapahoe	1200 PM TO 800 PM	Trace (60%) to 0.2" (40%) to 0.5" (20%)	LOW
Boulder	1200 PM TO 800 PM	Trace (60%) to 0.2" (30%) to 0.5" (10%)	LOW
Broomfield	1200 PM TO 800 PM	Trace (60%) to 0.2" (30%) to 0.5" (10%)	LOW
Denver	1200 PM TO 800 PM	Trace (60%) to 0.2" (30%) to 0.5" (10%)	LOW
Douglas	1200 PM TO 800 PM	Trace (60%) to 0.2" (40%) to 0.5" (20%)	LOW
Jefferson	1200 PM TO 800 PM	Trace (60%) to 0.2" (30%) to 0.5" (10%)	LOW
Foothills above 6500ft
Boulder	1200 PM TO 800 PM	Trace (60%) to 0.2" (30%) to 0.5" (10%)	LOW
Douglas	1200 PM TO 800 PM	Trace (60%) to 0.2" (30%) to 0.5" (10%)	LOW
Jefferson	1200 PM TO 800 PM	Trace (60%) to 0.2" (30%) to 0.5" (10%)	LOW

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.