Time: 755 AM Tue June 30, 2020 Forecaster: Justin Brooks

Heavy Precipitation Outlook
Flash Flood Prediction Program

COOLER TODAY WITH A SLIGHT CHANCE FOR MIDDAY RAIN/ISOLATED THUNDERSTORMS
-A cold front moved in overnight bringing cooler temperatures across the District today with highs in the upper 70s to low 80s on the plains, with low to mid 70s in the foothills.
-Another weak disturbance will move through late this morning resulting in a slight chance for rain showers/isolated thunderstorms between 10-4pm, favoring areas east of I-25. Rainfall should remain minimal today, as any storms that develop will move between 10-20mph from west to east limiting any point rainfall amounts.
-Once the weak disturbance moves through skies will clear into the evening with dry conditions expected over the next few days. Overnight lows will drop into the low to mid 50's across the District, with upper 40's to low 50's for the foothills.
STORM RAINFALL POTENTIAL AND DURATION: Rain showers and weak thunderstorms will produce a trace to 0.1" of rain. A stronger, slower moving thunderstorm will have the potential to produce up to 0.2" in 10-30 minutes.

A LOOK AHEAD: High-pressure begins to build Wednesday bringing high temperatures back into the upper 80s to 90 along with dry conditions. Even warmer Thursday with high in the low 90s with a slight chance for afternoon/early evening rain showers/isolated thunderstorms. Similar conditions Friday with highs in the low 90's with a better chance for afternoon and evening rain showers/thunderstorms although the threat for heavy looks minimal, if any, at this time.

Location Prime Time 30-Minute Rainfall
and % Probability
Message
Potential
Plains      
Adams 1000 AM TO 400 PM
Trace (30%) to 0.1" (20%) to 0.2" (10%) NONE
Arapahoe 1000 AM TO 400 PM
Trace (30%) to 0.1" (20%) to 0.2" (10%) NONE
Boulder 1000 AM TO 400 PM
Trace (30%) to 0.1" (10%) to 0.2" (5%) NONE
Broomfield 1000 AM TO 400 PM
Trace (30%) to 0.1" (15%) to 0.2" (5%) NONE
Denver 1000 AM TO 400 PM
Trace (30%) to 0.1" (10%) to 0.2" (5%) NONE
Douglas 1000 AM TO 400 PM
Trace (30%) to 0.1" (15%) to 0.2" (5%) NONE
Jefferson 1000 AM TO 400 PM
Trace (30%) to 0.1" (10%) to 0.2" (5%) NONE
Foothills above 6500ft      
Boulder 1000 AM TO 400 PM
Trace (30%) to 0.1" (5%) NONE
Douglas 1000 AM TO 400 PM
Trace (30%) to 0.1" (5%) NONE
Jefferson 1000 AM TO 400 PM
Trace (30%) to 0.1" (5%) NONE
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.