Flash Flood Prediction Program

-	Message 1's have been issued for NE portions of the District including Adams and DIA as a strong thunderstorm has developed in the area.
-	Additional Messages may be needed if storms back build to the W/SW. Strong thunderstorms will have the potential for brief heavy rainfall, gusty winds, frequent cloud-to-ground lightning and large hail.
-	Best chances for thunderstorm activity looks to be through 11pm, but could linger...

STORM RAINFALL POTENTIAL AND DURATION: Thunderstorms will have the potential to produce 0.4-1.0" of rain in 10-30 minutes.

WORST CASE SCENARIO: A stationary strong thunderstorm may result in up to 2" of rain in 60 minutes or less.

County	Message	Valid Times	Prime Time
Adams County	1	Current TO 1100 PM	Current TO 1000 PM
DIA	1	Current TO 1100 PM	Current TO 1000 PM

County-specific Quantitative Precipitation Outlook	Precipitation Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	Current TO 1100 PM THU	0.1" (100%) to 0.4" (75%) to 1.2" (30%)	ISSUED
Arapahoe	Current TO 1100 PM THU	0.1" (70%) to 0.4" (40%) to 1.2" (15%)	HIGH
Boulder	Current TO 1100 PM THU	0.1" (70%) to 0.4" (40%) to 1.2" (15%)	HIGH
Broomfield	Current TO 1100 PM THU	0.1" (75%) to 0.4" (50%) to 1.2" (20%)	HIGH
Denver	Current TO 1100 PM THU	0.1" (90%) to 0.4" (60%) to 1.2" (20%)	ISSUED
Douglas	Current TO 1100 PM THU	0.1" (50%) to 0.4" (20%) to 1.2" (5%)	LOW
Jefferson	Current TO 1100 PM THU	0.1" (50%) to 0.4" (20%) to 1.2" (5%)	LOW
Foothills above 6500ft
Boulder	Current TO 1100 PM THU	0.1" (50%) to 0.4" (20%) to 1.2" (5%)	LOW
Douglas	Current TO 1100 PM THU	0.1" (50%) to 0.4" (20%) to 1.2" (5%)	LOW
Jefferson	Current TO 1100 PM THU	0.1" (50%) to 0.4" (20%) to 1.2" (5%)	LOW

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.