Time: 737 PM Tue July 21, 2020 Forecaster: Brad Simmons

Internal Message Status
Flash Flood Prediction Program

MESSAGE 1'S WILL BE ALLOWED TO EXPIRE AT 8PM
-Message 1's will be allowed to expire at 8:00 pm as the threat for heavy rainfall has ended for the day.
-Storms developed SW and SE of the District this afternoon but did not develop over the District as a whole despite high surface moisture and a "Denver Cyclone" in place. Now that the surface convergence line has lifted N of the District and temperatures are cooling back into the upper 70's to lower 80's the threat for heavy rainfall has ended.
-Additional shower and possibly a weak thunderstorm remains possible into the evening but it's looking like most areas will be on the dry side for the remainder of the evening and overnight period.
STORM RAINFALL POTENTIAL AND DURATION: An isolated rain shower or weak thunderstorm will produce...

County Message Valid Times Prime Time
Boulder County 1 Current TO 800 PM Current TO 745 PM
Jefferson County 1 Current TO 800 PM Current TO 745 PM
Broomfield County 1 Current TO 800 PM Current TO 745 PM
Douglas County 1 Current TO 800 PM Current TO 745 PM
Adams County 1 Current TO 800 PM Current TO 745 PM
Denver County 1 Current TO 800 PM Current TO 745 PM
DIA 1 Current TO 800 PM Current TO 745 PM
Arapahoe County 1 Current TO 800 PM Current TO 745 PM
the City of Aurora 1 Current TO 800 PM Current TO 745 PM
Arvada 1 Current TO 800 PM Current TO 745 PM
Wheat Ridge 1 Current TO 800 PM Current TO 745 PM
Lakewood 1 Current TO 800 PM Current TO 745 PM

County-specific Quantitative
Precipitation Outlook
Precipitation Time 30-Minute Rainfall
and % Probability
Message
Potential
Plains      
Adams Current TO 1000 PM TUE
Trace (10%) to 0.1" (5%) ISSUED
Arapahoe Current TO 1000 PM TUE
Trace (10%) to 0.1" (5%) ISSUED
Boulder Current TO 1000 PM TUE
Trace (10%) to 0.1" (5%) ISSUED
Broomfield Current TO 1000 PM TUE
Trace (10%) to 0.1" (5%) ISSUED
Denver Current TO 1000 PM TUE
Trace (10%) to 0.1" (5%) ISSUED
Douglas Current TO 1000 PM TUE
Trace (10%) to 0.1" (5%) ISSUED
Jefferson Current TO 1000 PM TUE
Trace (10%) to 0.1" (5%) ISSUED
Foothills above 6500ft      
Boulder Current TO 1000 PM TUE
Trace (20%) to 0.1" (10%) ISSUED
Douglas Current TO 1000 PM TUE
Trace (20%) to 0.1" (10%) ISSUED
Jefferson Current TO 1000 PM TUE
Trace (20%) to 0.1" (10%) ISSUED
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.