Flash Flood Prediction Program

A high-pressure system builds over the Four-Corners region today, supporting warmer and dryer conditions across the state. Sunny morning skies will permit afternoon temperatures to climb into the upper 80s to low 90s with surface dewpoints in the upper 40s to low 50s and precipitable water (PWAT) values around 0.75”. These conditions will support isolated thunderstorms this afternoon and evening. Convection initiation will begin around 1pm across complex terrain, with storms moving southeast into the District between 15-20 mph. Thunderstorm activity is expected to dissipate by the late evening, with skies gradually clearing overnight.

STORM RAINFALL POTENTIAL AND DURATION: Thunderstorms today have the potential to produce up to 0.50” in 10-30 minutes.

WORST CASE SCENARIO: A slow-moving, strong thunderstorm may be capable of producing up to 1.00” or more in 30 minutes or less.

A LOOK AHEAD: Hot afternoon temperatures continue Friday, with highs climbing into the upper 80s to low 90s across the Plains with chances for showers and thunderstorms through the evening. A cold front is expected to sweep across the region early Saturday morning, supporting a more active pattern this weekend and early next week.

Location	Prime Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	100 PM TO 900 PM	Trace (85%) to 0.25" (50%) to 0.5" (15%)	LOW
Arapahoe	100 PM TO 900 PM	Trace (85%) to 0.25" (50%) to 0.5" (15%)	LOW
Boulder	100 PM TO 900 PM	Trace (85%) to 0.25" (50%) to 0.5" (15%)	LOW
Broomfield	100 PM TO 900 PM	Trace (85%) to 0.25" (50%) to 0.5" (15%)	LOW
Denver	100 PM TO 900 PM	Trace (85%) to 0.25" (50%) to 0.5" (15%)	LOW
Douglas	100 PM TO 900 PM	Trace (85%) to 0.25" (50%) to 0.5" (15%)	LOW
Jefferson	100 PM TO 900 PM	Trace (85%) to 0.25" (50%) to 0.5" (15%)	LOW
Foothills above 6500ft
Boulder	1200 PM TO 800 PM	Trace (85%) to 0.25" (50%) to 0.5" (15%)	LOW
Douglas	1200 PM TO 800 PM	Trace (85%) to 0.25" (50%) to 0.5" (15%)	LOW
Jefferson	1200 PM TO 800 PM	Trace (85%) to 0.25" (50%) to 0.5" (15%)	LOW

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.