Flash Flood Prediction Program

-	A similar set up to yesterday with dominate NW flow aloft and elevated surface moisture will bring another good chance for showers/thunderstorms across the District this afternoon and evening. Early morning cloud cover will limit today's high temperatures in the upper 70's to low 80's. Current dew points are in the mid 50's to low 60's across the District and should stay through the day and into this evening.
-	Thunderstorms will initially develop over the foothills by midday, while the plains should remain capped initially. By early-afternoon, thunderstorm chances will increase over the plains as storms move eastward with a slight chance for thunderstorms to become severe bringing large hail, gusty winds and heavy rainfall. In addition, outflow boundaries may set up over portions of the District and act as a focal point for thunderstorm development into the evening.
-	Storms today will be relatively slow-moving due to weak steering flow, which will result in a threat for heavy rainfall with abundant low level moisture in place. General storm motions will be to the E/SE at 7-12mph, but storms could exhibit weak/erratic movement at times, along with the potential to stall along outflow or wind convergence boundaries. The best chance of thunderstorms will persist into the evening, before storm coverage and intensity gradually decreases after sunset.

STORM RAINFALL POTENTIAL AND DURATION: Weak to moderate thunderstorms will produce rainfall amounts of 0.1-0.4" in 10-30 minutes. Strong thunderstorms will be capable of producing rainfall amounts of 0.5-1.2" in 10-30 minutes.

WORST CASE SCENARIO: A strong thunderstorm stalls along a wind convergence boundary and produces heavy rainfall of up to 2.8" in 60-90 minutes.

A LOOK AHEAD: The general pattern will persist into Tuesday with warmer temperatures in the mid to upper 80's with another chance for afternoon/evening showers/thunderstorms, although the threat for severe weather will be very low. Temperatures will start to climb back into the 90's Wednesday with another good chance for afternoon showers/isolated thunderstorms with little to no severe threat.

Location	Prime Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	Current TO 1000 PM MON	0.1" (80%) to 0.4" (50%) to 1.2" (20%)	HIGH
Arapahoe	Current TO 1000 PM MON	0.1" (80%) to 0.4" (50%) to 1.2" (20%)	HIGH
Boulder	Current TO 1000 PM MON	0.1" (80%) to 0.4" (50%) to 1.2" (20%)	HIGH
Broomfield	Current TO 1000 PM MON	0.1" (80%) to 0.4" (50%) to 1.2" (20%)	HIGH
Denver	Current TO 1000 PM MON	0.1" (80%) to 0.4" (50%) to 1.2" (20%)	HIGH
Douglas	Current TO 1000 PM MON	0.1" (80%) to 0.4" (50%) to 1.2" (20%)	HIGH
Jefferson	Current TO 1000 PM MON	0.1" (80%) to 0.4" (50%) to 1.2" (20%)	HIGH
Foothills above 6500ft
Boulder	Current TO 1000 PM MON	0.1" (80%) to 0.4" (50%) to 1.2" (20%)	HIGH
Douglas	Current TO 1000 PM MON	0.1" (80%) to 0.4" (50%) to 1.2" (20%)	HIGH
Jefferson	Current TO 1000 PM MON	0.1" (80%) to 0.4" (50%) to 1.2" (20%)	HIGH

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.