Flash Flood Prediction Program

-	Message 1's will be extended through midnight as thunderstorms are ongoing over southern areas of the District at this time and will have the potential to produce heavy rain should they intensify.
-	Current thunderstorm activity is limited to areas S of I-70 but may spread northward. Strong thunderstorms may also contain hail as well as moderate to brief heavy rain.
-	Message 1's may need to be extended beyond midnight if thunderstorm activity does not diminish in a timely fashion.

STORM RAINFALL POTENTIAL AND DURATION: Weak to moderate thunderstorms will produce 0.1-0.3" in 10-30 minutes. Strong thunderstorms will have the potential to produce 0.3-0.8" in 10-30 minutes.

WORST CASE SCENARIO: A stationary strong thunderstorm may result in up to 1.5" of rain in 45-60 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 1159 PM SAT	0.1" (50%) to 0.3" (25%) to 0.8" (10%)	ISSUED
Arapahoe	Current TO 1159 PM SAT	0.1" (80%) to 0.3" (50%) to 0.8" (15%)	ISSUED
Boulder	Current TO 1159 PM SAT	0.1" (50%) to 0.3" (25%) to 0.8" (10%)	ISSUED
Broomfield	Current TO 1159 PM SAT	0.1" (50%) to 0.3" (25%) to 0.8" (10%)	ISSUED
Denver	Current TO 1159 PM SAT	0.1" (60%) to 0.3" (30%) to 0.8" (10%)	ISSUED
Douglas	Current TO 1159 PM SAT	0.1" (90%) to 0.3" (60%) to 0.8" (20%)	ISSUED
Jefferson	Current TO 1159 PM SAT	0.1" (60%) to 0.3" (30%) to 0.8" (10%)	ISSUED
Foothills above 6500ft
Boulder	Current TO 1159 PM SAT	0.1" (50%) to 0.3" (25%) to 0.8" (10%)	ISSUED
Douglas	Current TO 1159 PM SAT	0.1" (80%) to 0.3" (40%) to 0.8" (15%)	ISSUED
Jefferson	Current TO 1159 PM SAT	0.1" (60%) to 0.3" (30%) to 0.8" (10%)	ISSUED

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.