Flash Flood Prediction Program

-	The mid-summer heat wave continues along the Front Range Friday, underneath a strong ridge of high pressure anchored to our SW. Afternoon temperatures will climb back into the mid to upper 90s, with plenty of sunshine expected this morning.
-	A slight increase in mid and upper-level moisture will lead to an uptick in shower and thunderstorm activity by early afternoon. Most of today’s storms will be pulse-type and high-based, and the threat for heavy rainfall is low.
-	Today's storms will track to the E at around 10-15mph, but some storms could move more slowly if anchored to an outflow boundary. The best chance for a thunderstorm over the District will occur between about 3:00pm-8:00pm.

STORM RAINFALL POTENTIAL AND DURATION: Weak to moderate showers and thunderstorms will produce rainfall amounts between Trace-0.15" in 10-30 minutes. Stronger thunderstorms could produce rainfall between 0.15-0.35" in 10-30 minutes.

WORST CASE SCENARIO: A cluster of storms anchored to a boundary or backbuilding of storm cells over the same area results in rainfall up to 0.50" in 10-30 minutes.

A LOOK AHEAD: Little change is expected on Saturday, as upper-level high pressure remains in control of the region. Daytime temperatures will hold in the 90s, while subtropical moisture continues to rotate around the ridge’s periphery into Colorado.

Location	Prime Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	300 PM TO 800 PM	Trace (70%) to 0.2" (50%) to 0.5" (10%)	LOW
Arapahoe	300 PM TO 800 PM	Trace (80%) to 0.2" (55%) to 0.5" (15%)	LOW
Boulder	300 PM TO 800 PM	Trace (70%) to 0.2" (50%) to 0.5" (10%)	LOW
Broomfield	300 PM TO 800 PM	Trace (70%) to 0.2" (50%) to 0.5" (10%)	LOW
Denver	300 PM TO 800 PM	Trace (75%) to 0.2" (55%) to 0.5" (10%)	LOW
Douglas	300 PM TO 800 PM	Trace (85%) to 0.2" (60%) to 0.5" (15%)	LOW
Jefferson	300 PM TO 800 PM	Trace (85%) to 0.2" (60%) to 0.5" (15%)	LOW
Foothills above 6500ft
Boulder	200 PM TO 800 PM	Trace (75%) to 0.2" (55%) to 0.5" (15%)	LOW
Douglas	200 PM TO 800 PM	Trace (90%) to 0.2" (65%) to 0.5" (20%)	LOW
Jefferson	200 PM TO 800 PM	Trace (90%) to 0.2" (65%) to 0.5" (20%)	LOW

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.