Flash Flood Prediction Program

Message 1’s have been allowed to expire at 9:30pm as the threat of heavy rainfall has ended for the day.

The surface wind convergence has washed out and storms are pushing eastward. Now that we are after sunset temperatures are cooling and no additional strong thunderstorm activity is expected this evening. Isolated rain showers and possibly a weak thunderstorm cannot be ruled out until around midnight. Best chances for additional shower activity will be over southern and eastern areas of the District as drier air makes pushes in from the west.

A slight decrease in thunderstorm activity is expected on Sunday but the storms that form in the afternoon will still be capable of becoming strong to severe and will have the potential to produce brief heavy rainfall and large hail.

STORM RAINFALL POTENTIAL AND DURATION: Rain showers will produce a trace to 0.1” of rain. An isolated weak thunderstorm will have the potential to produce 0.1-0.3” in 10-30 minutes.

County	Message	Valid Times	Prime Time

County-specific Quantitative Precipitation Outlook	Precipitation Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	Current TO 1159 PM SAT	Trace (60%) to 0.1" (30%) to 0.3" (10%)	NONE
Arapahoe	Current TO 1159 PM SAT	Trace (60%) to 0.1" (30%) to 0.3" (10%)	NONE
Boulder	Current TO 1159 PM SAT	Trace (40%) to 0.1" (20%) to 0.3" (5%)	NONE
Broomfield	Current TO 1159 PM SAT	Trace (40%) to 0.1" (20%) to 0.3" (5%)	NONE
Denver	Current TO 1159 PM SAT	Trace (60%) to 0.1" (30%) to 0.3" (10%)	NONE
Douglas	Current TO 1159 PM SAT	Trace (60%) to 0.1" (30%) to 0.3" (10%)	NONE
Jefferson	Current TO 1159 PM SAT	Trace (40%) to 0.1" (20%) to 0.3" (5%)	NONE
Foothills above 6500ft
Boulder	Current TO 1159 PM SAT	Trace (40%) to 0.1" (20%) to 0.3" (5%)	NONE
Douglas	Current TO 1159 PM SAT	Trace (40%) to 0.1" (20%) to 0.3" (5%)	NONE
Jefferson	Current TO 1159 PM SAT	Trace (40%) to 0.1" (20%) to 0.3" (5%)	NONE

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.