Flash Flood Prediction Program

-	Message 1's will be allowed to expire for all Counties at 4:00 AM as the threat for heavy rainfall has lowered for the remainder of the overnight period. Thunderstorms to the N of the District diminished upon approach leaving some lighter rain showers in their wake.
-	Strong thunderstorms developed over the District hours ago producing heavy rainfall and hail resulting in excessive runoff roadways and isolated areas of flash flooding. The thunderstorm activity has long since diminished.
-	There will be a few light rain showers and possibly a weak thunderstorm that into early Thursday morning but heavy rainfall is no longer anticipated. Another active thunderstorm day is expected later today and with all of the rain yesterday it may not take as much rain this afternoon to produce excessive runoff as the ground has become saturated in some areas.

STORM RAINFALL POTENTIAL AND DURATION: Additional rain showers and possibly a weak thunderstorm overnight will produce a trace to 0.3" of rain in 10-30 minutes.

WORST CASE SCENARIO: A moderate thunderstorm is able to develop in a cooling airmass with the potential to produce 0.3-0.8" of rain in 10-30 minutes.

County	Message	Valid Times	Prime Time
Boulder County	1	Current TO 400 AM	Current TO 400 AM
Arvada	1	Current TO 400 AM	Current TO 400 AM
the City of Aurora	1	Current TO 400 AM	Current TO 400 AM
Arapahoe County	1	Current TO 400 AM	Current TO 400 AM
DIA	1	Current TO 400 AM	Current TO 400 AM
Denver County	1	Current TO 400 AM	Current TO 400 AM
Adams County	1	Current TO 400 AM	Current TO 400 AM
Douglas County	1	Current TO 400 AM	Current TO 400 AM
Jefferson County	1	Current TO 400 AM	Current TO 400 AM
Broomfield County	1	Current TO 400 AM	Current TO 400 AM
Wheat Ridge	1	Current TO 400 AM	Current TO 400 AM
Lakewood	1	Current TO 400 AM	Current TO 400 AM

County-specific Quantitative Precipitation Outlook	Precipitation Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	Current TO 1000 AM THU	Trace (60%) to 0.1" (30%) to 0.3" (10%)	NONE
Arapahoe	Current TO 1000 AM THU	Trace (60%) to 0.1" (30%) to 0.3" (10%)	NONE
Boulder	Current TO 1000 AM THU	Trace (60%) to 0.1" (30%) to 0.3" (10%)	NONE
Broomfield	Current TO 1000 AM THU	Trace (60%) to 0.1" (30%) to 0.3" (10%)	NONE
Denver	Current TO 1000 AM THU	Trace (60%) to 0.1" (30%) to 0.3" (10%)	NONE
Douglas	Current TO 1000 AM THU	Trace (60%) to 0.1" (30%) to 0.3" (10%)	NONE
Jefferson	Current TO 1000 AM THU	Trace (60%) to 0.1" (30%) to 0.3" (10%)	NONE
Foothills above 6500ft
Boulder	Current TO 1000 AM THU	Trace (60%) to 0.1" (30%) to 0.3" (10%)	NONE
Douglas	Current TO 1000 AM THU	Trace (60%) to 0.1" (30%) to 0.3" (10%)	NONE
Jefferson	Current TO 1000 AM THU	Trace (60%) to 0.1" (30%) to 0.3" (10%)	NONE

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.