Flash Flood Prediction Program

-	Message 1's will be allowed to expire at midnight as the threat for heavy rainfall from thunderstorms has ended for the day. Additional rain showers will continue likely overnight into Saturday morning.
-	Now that temperatures are firmly in the 50's the threat for thunderstorms has diminished with precipitation for the remainder of the overnight period expected to fall as general rain showers. Rainfall rates from light to moderate rain showers will typically range from 0.05-0.30" in 30-60 minutes. A persistent moderate rainfall may result in higher rainfall rates.
-	Many areas of the District has reported between 1-2" or more of rain today. Additional rain showers overnight will continue to produce runoff as the ground is becoming saturated and some creeks/streams will continue to run high into Saturday morning. Thunderstorms are likely to develop by midday Saturday and will once again be very capable of producing heavy rainfall.

STORM RAINFALL POTENTIAL AND DURATION: Light to moderate rain showers will produce rainfall rates of 0.05-0.30" in 30-60 minutes. Heavy non-thunderstorm rain may result in rainfall rates of 0.3-0.8" in 30-60 minutes.

WORST CASE SCENARIO: Although unlikely, if a thunderstorm were to develop it would have the potential to produce heavy rainfall of 0.5-1.5" in 15-45 minutes.

County	Message	Valid Times	Prime Time
Boulder County	1	Current TO 1159 PM	1230 PM TO 1130 PM
Jefferson County	1	Current TO 1159 PM	1230 PM TO 1130 PM
Broomfield County	1	Current TO 1159 PM	1230 PM TO 1130 PM
Douglas County	1	Current TO 1159 PM	1230 PM TO 1130 PM
Adams County	1	Current TO 1159 PM	1230 PM TO 1130 PM
Denver County	1	Current TO 1159 PM	1230 PM TO 1130 PM
DIA	1	Current TO 1159 PM	1230 PM TO 1130 PM
Arapahoe County	1	Current TO 1159 PM	1230 PM TO 1130 PM
the City of Aurora	1	Current TO 1159 PM	1230 PM TO 1130 PM
Arvada	1	Current TO 1159 PM	1230 PM TO 1130 PM
Wheat Ridge	1	Current TO 1159 PM	1230 PM TO 1130 PM
Lakewood	1	Current TO 1159 PM	1230 PM TO 1130 PM

County-specific Quantitative Precipitation Outlook	Precipitation Time	60-Minute Rainfall and % Probability	Message Potential
Plains
Adams	Current TO 900 AM SAT	0.1" (100%) to 0.3" (75%) to 0.6" (25%)	ISSUED
Arapahoe	Current TO 900 AM SAT	0.1" (100%) to 0.3" (75%) to 0.6" (25%)	ISSUED
Boulder	Current TO 900 AM SAT	0.1" (100%) to 0.3" (75%) to 0.6" (25%)	ISSUED
Broomfield	Current TO 900 AM SAT	0.1" (100%) to 0.3" (75%) to 0.6" (25%)	ISSUED
Denver	Current TO 900 AM SAT	0.1" (100%) to 0.3" (75%) to 0.6" (25%)	ISSUED
Douglas	Current TO 900 AM SAT	0.1" (100%) to 0.3" (75%) to 0.6" (25%)	ISSUED
Jefferson	Current TO 900 AM SAT	0.1" (100%) to 0.3" (75%) to 0.6" (25%)	ISSUED
Foothills above 6500ft
Boulder	Current TO 900 AM SAT	0.1" (100%) to 0.3" (75%) to 0.6" (25%)	ISSUED
Douglas	Current TO 900 AM SAT	0.1" (100%) to 0.3" (75%) to 0.6" (25%)	ISSUED
Jefferson	Current TO 900 AM SAT	0.1" (100%) to 0.3" (75%) to 0.6" (25%)	ISSUED

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.