Flash Flood Prediction Program

-	A Message 1 has been issued for Adams County and will be valid through 9pm.
-	A strong/severe thunderstorm has developed over Adams County and is producing large hail and moderate to brief heavy rainfall. This storm will move to the NE at 20-25mph.
-	Outflow from this storm may trigger additional thunderstorm development with the potential for Message 1's to be issued for other Counties.

STORM RAINFALL POTENTIAL AND DURATION: Thunderstorms will produce 0.3-0.8" in 10-30 minutes.

WORST CASE SCENARIO: An isolated strong/severe thunderstorm stalls along a wind convergence boundary and produces heavy rainfall of up to 1.4" in 45-60 minutes.

County	Message	Valid Times	Prime Time
Arvada	1	Current TO 900 PM	Current TO 830 PM

County-specific Quantitative Precipitation Outlook	Precipitation Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	Current TO 900 PM MON	0.1" (100%) to 0.3" (80%) to 0.8" (60%)	ISSUED
Arapahoe	Current TO 900 PM MON	0.1" (50%) to 0.3" (20%) to 0.8" (10%)	LOW
Boulder	Current TO 900 PM MON	0.1" (50%) to 0.3" (20%) to 0.8" (10%)	LOW
Broomfield	Current TO 900 PM MON	0.1" (50%) to 0.3" (20%) to 0.8" (10%)	LOW
Denver	Current TO 900 PM MON	0.1" (50%) to 0.3" (20%) to 0.8" (10%)	LOW
Douglas	Current TO 900 PM MON	0.1" (50%) to 0.3" (20%) to 0.8" (10%)	LOW
Jefferson	Current TO 900 PM MON	0.1" (50%) to 0.3" (20%) to 0.8" (10%)	LOW
Foothills above 6500ft
Boulder	Current TO 900 PM MON	0.1" (50%) to 0.3" (20%) to 0.8" (10%)	LOW
Douglas	Current TO 900 PM MON	0.1" (50%) to 0.3" (20%) to 0.8" (10%)	LOW
Jefferson	Current TO 900 PM MON	0.1" (50%) to 0.3" (20%) to 0.8" (10%)	LOW

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.