Flash Flood Prediction Program

Message 2’s will be allowed to expire at 11:59pm as the threat of heavy rainfall has come to an end.

A few lingering showers/isolated thunderstorms surround the District currently, however, storm strengths have diminished at this time and should continue to weaken through the rest of the overnight. The best chance for additional showers/isolated thunderstorms will be from now through 4am. A few lingering showers will be possible through daybreak tomorrow, generally areas east of the District and onto the eastern plains.

Lots of moisture hanging around the surface from today’s rainfall will bring a chance for patchy fog tomorrow morning. Skies should clear through the morning with another good chance for heavy rainfall tomorrow from noon to midnight as another Flood Watch will be in effect. Overnight lows will dip into the upper 50’s to low 60’s.

STORM RAINFALL POTENTIAL AND DURATION: Typical rain showers/isolated thunderstorms will produce a TR-0.25” total in 10-30 minutes. A moderate thunderstorm could produce 0.25-0.50” total in 10-30 minutes.

WORST CASE SCENARIO: A strong thunderstorm, or training of moderate thunderstorms has the potential to produce 0.5-1.0” in 45-60 minutes.

County	Message	Valid Times	Prime Time
Boulder County	2	Current TO 1159 PM	Current TO 1159 PM
Jefferson County	2	Current TO 1159 PM	Current TO 1159 PM
Broomfield County	2	Current TO 1159 PM	Current TO 1159 PM
Douglas County	2	Current TO 1159 PM	Current TO 1159 PM
Adams County	2	Current TO 1159 PM	Current TO 1159 PM
Denver County	2	Current TO 1159 PM	Current TO 1159 PM
DIA	2	Current TO 1159 PM	Current TO 1159 PM
Arapahoe County	2	Current TO 1159 PM	Current TO 1159 PM
the City of Aurora	2	Current TO 1159 PM	Current TO 1159 PM
Arvada	2	Current TO 1159 PM	Current TO 1159 PM
Wheat Ridge	2	Current TO 1159 PM	Current TO 1159 PM
Lakewood	2	Current TO 1159 PM	Current TO 1159 PM

County-specific Quantitative Precipitation Outlook	Precipitation Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	Current TO 600 AM TUE	Trace (60%) to 0.25" (30%) to 0.5" (15%)	ISSUED
Arapahoe	Current TO 600 AM TUE	Trace (60%) to 0.25" (30%) to 0.5" (15%)	ISSUED
Boulder	Current TO 600 AM TUE	Trace (60%) to 0.25" (30%) to 0.5" (15%)	ISSUED
Broomfield	Current TO 600 AM TUE	Trace (60%) to 0.25" (30%) to 0.5" (15%)	ISSUED
Denver	Current TO 600 AM TUE	Trace (60%) to 0.25" (30%) to 0.5" (15%)	ISSUED
Douglas	Current TO 600 AM TUE	Trace (60%) to 0.25" (30%) to 0.5" (15%)	ISSUED
Jefferson	Current TO 600 AM TUE	Trace (60%) to 0.25" (30%) to 0.5" (15%)	ISSUED
Foothills above 6500ft
Boulder	Current TO 600 AM TUE	Trace (50%) to 0.25" (25%) to 0.5" (10%)	ISSUED
Douglas	Current TO 600 AM TUE	Trace (50%) to 0.25" (25%) to 0.5" (10%)	ISSUED
Jefferson	Current TO 600 AM TUE	Trace (50%) to 0.25" (25%) to 0.5" (10%)	ISSUED

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.