Flash Flood Prediction Program

Message 1’s will be allowed to expire at 10:00pm as the threat of heavy rain has come to an end.

A few strong storms impacted the District earlier this afternoon and have since moved out and onto the eastern plains. Skies have cleared over the District and should remain fairly clear into the evening. Another wave of showers and possibly a thunderstorm or two will be possible later this evening, between 9pm-11pm with skies again overnight and into Saturday.

Overnight temperatures will drop to around 60 degrees for most of the District with mid to upper 50s along the foothills. High-pressure starts to build tomorrow bringing sunny skies with high temperatures jumping back to around 90 degrees.

STORM RAINFALL POTENTIAL AND DURATION: Typical showers will produce a trace to 0.15” total in 10-30 minutes. A moderate shower/thunderstorm will produce 0.15”-0.30” total in 10-30 minutes.

WORST CASE SCENARIO: If a stronger storm is able to develop, it will have the potential to produce up to 0.60” in 30-60 minutes.

County	Message	Valid Times	Prime Time
Boulder County	1	Current TO 800 PM	Current TO 730 PM
Jefferson County	1	Current TO 800 PM	Current TO 730 PM
Broomfield County	1	Current TO 800 PM	Current TO 730 PM
Douglas County	1	Current TO 800 PM	Current TO 730 PM
Adams County	1	Current TO 800 PM	Current TO 730 PM
Denver County	1	Current TO 800 PM	Current TO 730 PM
DIA	1	Current TO 800 PM	Current TO 730 PM
Arapahoe County	1	Current TO 800 PM	Current TO 730 PM
the City of Aurora	1	Current TO 800 PM	Current TO 730 PM
Arvada	1	Current TO 800 PM	Current TO 730 PM
Wheat Ridge	1	Current TO 800 PM	Current TO 730 PM
Lakewood	1	Current TO 800 PM	Current TO 730 PM

County-specific Quantitative Precipitation Outlook	Precipitation Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	Current TO 1159 PM FRI	Trace (30%) to 0.15" (15%) to 0.3" (5%)	NONE
Arapahoe	Current TO 1159 PM FRI	Trace (30%) to 0.15" (15%) to 0.3" (5%)	NONE
Boulder	Current TO 1159 PM FRI	Trace (30%) to 0.15" (15%) to 0.3" (5%)	NONE
Broomfield	Current TO 1159 PM FRI	Trace (30%) to 0.15" (15%) to 0.3" (5%)	NONE
Denver	Current TO 1159 PM FRI	Trace (30%) to 0.15" (15%) to 0.3" (5%)	NONE
Douglas	Current TO 1159 PM FRI	Trace (30%) to 0.15" (15%) to 0.3" (5%)	NONE
Jefferson	Current TO 1159 PM FRI	Trace (30%) to 0.15" (15%) to 0.3" (5%)	NONE
Foothills above 6500ft
Boulder	Current TO 1159 PM FRI	Trace (40%) to 0.15" (20%) to 0.3" (10%)	NONE
Douglas	Current TO 1159 PM FRI	Trace (40%) to 0.15" (20%) to 0.3" (10%)	NONE
Jefferson	Current TO 1159 PM FRI	Trace (40%) to 0.15" (20%) to 0.3" (10%)	NONE

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.