Time: 943 AM Wed August 7, 2019 Forecaster: Brad Simmons

Heavy Precipitation Outlook
Flash Flood Prediction Program

A BIT COOLER WITH ISOLATED TO WIDELY SCATTERED AFTERNOON THUNDERSTORMS
-Temperatures will be a bit cooler today versus yesterday but still above normal for this time of year with readings in the low to mid 90's over the plains. Normal high for Denver today is 89 degrees.
-There will be an increase in thunderstorm activity compared to yesterday with isolated to widely scattered thunderstorms between 2-10pm. Most storms today will be weak to moderate producing gusty winds and light to briefly moderate rain. Storms will move from W to E at 15-20mph.
-Thunderstorm activity may persist a bit after sunset this evening with dry conditions expected before midnight.
STORM RAINFALL POTENTIAL AND DURATION: Typical weak to moderate thunderstorms will produce a trace to 0.3" in 10-30 minutes. Although unlikely, a strong thunderstorm will have the potential to produce 0.3-0.8" in 10-30 minutes.

WORST CASE SCENARIO: A slow moving strong thunderstorm may produce up to 1.5" of rain in 45-90 minutes.

A LOOK AHEAD: A cold front will move through Thursday morning cooling temperatures into the upper 80's for highs over the plains. Moisture will increase behind the front with scattered thunderstorms in the afternoon and early evening capable of producing heavy rainfall which may lead to excessive runoff.

Location Prime Time 30-Minute Rainfall
and % Probability
Message
Potential
Plains      
Adams 200 PM TO 1000 PM
Trace (65%) to 0.2" (30%) to 0.6" (10%) LOW
Arapahoe 200 PM TO 1000 PM
Trace (65%) to 0.2" (30%) to 0.6" (10%) LOW
Boulder 200 PM TO 1000 PM
Trace (70%) to 0.2" (35%) to 0.6" (10%) LOW
Broomfield 200 PM TO 1000 PM
Trace (65%) to 0.2" (30%) to 0.6" (10%) LOW
Denver 200 PM TO 1000 PM
Trace (65%) to 0.2" (30%) to 0.6" (10%) LOW
Douglas 200 PM TO 1000 PM
Trace (70%) to 0.2" (35%) to 0.6" (10%) LOW
Jefferson 200 PM TO 1000 PM
Trace (70%) to 0.2" (35%) to 0.6" (10%) LOW
Foothills above 6500ft      
Boulder 100 PM TO 1000 PM
Trace (80%) to 0.2" (40%) to 0.6" (10%) LOW
Douglas 100 PM TO 1000 PM
Trace (80%) to 0.2" (40%) to 0.6" (10%) LOW
Jefferson 100 PM TO 1000 PM
Trace (80%) to 0.2" (40%) to 0.6" (10%) LOW
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.