Flash Flood Prediction Program

-	Conditions will remain unseasonably warm over the District today with highs reaching the upper 80's to around 90 with 70's in the Front Range foothills. There is a little more mid and upper level moisture to work with today and is expected to result in an uptick in thunderstorm activity compared to yesterday.
-	Thunderstorms will develop early over the foothills before noon. With relatively slow storm motions the initial activity is expected to remain over the higher terrain until early afternoon. By 1-2pm there will be a modest chance for thunderstorms over the plains. Isolated to widely scattered thunderstorm coverage is then expected into the early evening. Best chances for storms over the plains will be between 2-9pm.
-	Typical thunderstorms that develop today will produce light to moderate rain and gusty winds. An isolated strong thunderstorm will be capable of producing brief heavy rainfall and hail. A large, slower moving strong thunderstorm will be capable of producing an extended period of heavy rain that may lead to excessive runoff.

STORM RAINFALL POTENTIAL AND DURATION: Weak to moderate thunderstorms will produce 0.1-0.3" in 10-30 minutes. A strong thunderstorm will be capable of producing 0.3-0.9" of heavy rain in 10-30 minutes.

WORST CASE SCENARIO: A large, slow moving thunderstorm will have the potential to produce up to 1.8" in 60 minutes or less.

A LOOK AHEAD: Temperatures will warm a degree or two on Monday over the District with a decrease in afternoon thunderstorms. There will still be isolated afternoon thunderstorms between 2-8pm with a lesser chance for heavy rainfall. Tuesday is trending dry at this time over the plains but there could be a few higher elevation thunderstorms in the afternoon.

Location	Prime Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	200 PM TO 900 PM	0.1" (65%) to 0.3" (40%) to 0.9" (10%)	LOW
Arapahoe	200 PM TO 900 PM	0.1" (70%) to 0.3" (50%) to 0.9" (10%)	LOW
Broomfield	200 PM TO 900 PM	0.1" (65%) to 0.3" (40%) to 0.9" (10%)	LOW
Denver	200 PM TO 900 PM	0.1" (65%) to 0.3" (40%) to 0.9" (10%)	LOW
Boulder	100 PM TO 900 PM	0.1" (65%) to 0.3" (40%) to 0.9" (10%)	LOW
Douglas	100 PM TO 900 PM	0.1" (75%) to 0.3" (50%) to 0.9" (15%)	MOD
Jefferson	100 PM TO 900 PM	0.1" (70%) to 0.3" (50%) to 0.9" (10%)	LOW
Foothills above 6500ft
Boulder	1200 PM TO 900 PM	0.1" (85%) to 0.3" (50%) to 0.9" (15%)	MOD
Douglas	1200 PM TO 900 PM	0.1" (85%) to 0.3" (50%) to 0.9" (15%)	MOD
Jefferson	1200 PM TO 900 PM	0.1" (85%) to 0.3" (50%) to 0.9" (15%)	MOD

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.