Flash Flood Prediction Program

-	Message 1's have been extended to 11:59pm as the threat for heavy rainfall remains for the District.
-	A few very close calls through the afternoon and evening for heavy rainfall around the District. Since, storms have continued eastward were they strengthened, eventually core dumping in far eastern Adams and Arapahoe Counties. This resulted in a gust from from the east to interact with a few lingering showers in Douglas County bringing an extended chance for moderate to brief heavy rainfall.
-	Currently storms are impacting northern portions of Douglas County and will likely pulse up and down, possibly triggering additional storms into other portions of the District into the late evening. Biggest threat will be a quick 0.5" in 10 minutes, however a stalled out, stronger storm has the potential to produce more rainfall. After midnight storms should lose their intensity with scattered rain showers possible through 2am before skies gradually clear through daybreak tomorrow.

STORM RAINFALL POTENTIAL AND DURATION: Weak to moderate thunderstorms will have the potential to produce 0.1-0.5" in 10-30 minutes. Strong thunderstorms will have the potential to produce rainfall rates of 0.5-1.0" in 10-30 minutes.

WORST CASE SCENARIO: A slower moving or briefly anchored strong thunderstorm may produce rainfall amounts of up to 2.0" in 45-75 minutes.

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

County-specific Quantitative Precipitation Outlook	Precipitation Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	Current TO 200 AM MON	Trace (30%) to 0.1" (15%) to 0.5" (10%)	ISSUED
Arapahoe	Current TO 200 AM MON	Trace (60%) to 0.1" (30%) to 0.5" (15%)	ISSUED
Boulder	Current TO 200 AM MON	Trace (30%) to 0.1" (15%) to 0.5" (10%)	ISSUED
Broomfield	Current TO 200 AM MON	Trace (30%) to 0.1" (15%) to 0.5" (10%)	ISSUED
Denver	Current TO 200 AM MON	Trace (40%) to 0.1" (20%) to 0.5" (10%)	ISSUED
Douglas	Current TO 200 AM MON	Trace (80%) to 0.1" (40%) to 0.5" (20%)	ISSUED
Jefferson	Current TO 200 AM MON	Trace (30%) to 0.1" (15%) to 0.5" (10%)	ISSUED
Foothills above 6500ft
Boulder	Current TO 200 AM MON	Trace (30%) to 0.1" (15%) to 0.5" (10%)	ISSUED
Douglas	Current TO 200 AM MON	Trace (60%) to 0.1" (30%) to 0.5" (15%)	ISSUED
Jefferson	Current TO 200 AM MON	Trace (50%) to 0.1" (25%) to 0.5" (10%)	ISSUED

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.