Time: 936 AM Sat May 16, 2020 Forecaster: Brad Simmons

Heavy Precipitation Outlook
Flash Flood Prediction Program

ISOLATED AFTERNOON THUNDERSTORMS FAVORING THE FOOTHILLS AND PALMER DIVIDE
-Behind the upper level disturbance that brought beneficial moisture to the District yesterday conditions will start to dry out today. There were a few light rain showers/sprinkles that moved through earlier this morning with dry conditions currently. Temperatures are expected to warm into the upper 60's to around 70 over the plains this afternoon.
-Thunderstorm activity today is expected to be isolated, favoring the foothills and Palmer Divide with many areas within the District potentially ending up dry as a warm layer of air aloft likely inhibits convection. Best chances for isolated thunderstorms today will be between 2-8pm. Storm motion will be fairly brisk from WNW to ESE. Typical storms will produce brief light rain. There is not a severe thunderstorm or heavy rainfall threat today.
-Tonight conditions will be dry with temperatures dropping into the mid and upper 40's over the plains.
STORM RAINFALL POTENTIAL AND DURATION: Rain showers and weak thunderstorms will produce a trace to 0.10" of rain. A moderate thunderstorm will have the potential to produce 0.1-0.3" in 10-30 minutes.

A LOOK AHEAD: Warming to around 80 over the plains on Sunday with dry conditions over the lower elevations and a continued chance for an isolated afternoon thunderstorm over the foothills and Palmer Divide.

Location Prime Time 30-Minute Rainfall
and % Probability
Message
Potential
Plains      
Adams 200 PM TO 800 PM
Trace (20%) to 0.1" (10%) to 0.2" (5%) NONE
Arapahoe 200 PM TO 800 PM
Trace (20%) to 0.1" (10%) to 0.2" (5%) NONE
Boulder 200 PM TO 800 PM
Trace (25%) to 0.1" (15%) to 0.2" (5%) NONE
Broomfield 200 PM TO 800 PM
Trace (20%) to 0.1" (10%) to 0.2" (5%) NONE
Denver 200 PM TO 800 PM
Trace (20%) to 0.1" (10%) to 0.2" (5%) NONE
Douglas 200 PM TO 800 PM
Trace (40%) to 0.1" (20%) to 0.3" (10%) NONE
Jefferson 200 PM TO 800 PM
Trace (25%) to 0.1" (15%) to 0.2" (5%) NONE
Foothills above 6500ft      
Boulder 100 PM TO 800 PM
Trace (50%) to 0.1" (25%) to 0.3" (10%) NONE
Douglas 100 PM TO 800 PM
Trace (75%) to 0.1" (40%) to 0.3" (20%) NONE
Jefferson 100 PM TO 800 PM
Trace (60%) to 0.1" (30%) to 0.3" (15%) NONE
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.