Time: 639 PM Thu July 25, 2019 Forecaster: Alan Smith

Internal Message Status
Flash Flood Prediction Program

MESSAGES WILL CONTINUE VALID
-Message 1's will continue valid for the entire District until 10:00pm.
-Thunderstorm activity has weakened across the District late this afternoon, with primarily rain showers impacting southern portions of the District at this time. The threat for thunderstorms has decreased heading into the evening, but another round of storms can't entirely be ruled out.
-Although the threat for heavy rainfall is decreasing overall, abundant moisture remains in place. Therefore, locally heavy rainfall remains a threat if a stronger thunderstorm manages to develop. Storm activity should taper off by mid to late evening with the loss of daytime heating.
STORM RAINFALL POTENTIAL AND DURATION: Weak to moderate thunderstorms will produce rainfall amounts of TR-0.3" in 10-30 minutes. Strong thunderstorms will be capable of producing rainfall of 0.3-0.9" in 10-30 minutes.

WORST CASE SCENARIO: Training of thunderstorm cells over the same area results in heavy rainfall of up to 2.0" in 60-90 minutes.

County Message Valid Times Prime Time
Boulder County 1 Current TO 1000 PM Current TO 830 PM
Jefferson County 1 Current TO 1000 PM Current TO 830 PM
Broomfield County 1 Current TO 1000 PM Current TO 830 PM
Douglas County 1 Current TO 1000 PM Current TO 830 PM
Adams County 1 Current TO 1000 PM Current TO 830 PM
Denver County 1 Current TO 1000 PM Current TO 830 PM
DIA 1 Current TO 1000 PM Current TO 830 PM
Arapahoe County 1 Current TO 1000 PM Current TO 830 PM
the City of Aurora 1 Current TO 1000 PM Current TO 830 PM
Arvada 1 Current TO 1000 PM Current TO 830 PM
Wheat Ridge 1 Current TO 1000 PM Current TO 830 PM
Lakewood 1 Current TO 1000 PM Current TO 830 PM

County-specific Quantitative
Precipitation Outlook
Precipitation Time 30-Minute Rainfall
and % Probability
Message
Potential
Plains      
Adams Current TO 1000 PM THU
0.1" (70%) to 0.3" (40%) to 0.9" (10%) ISSUED
Arapahoe Current TO 1000 PM THU
0.1" (70%) to 0.3" (40%) to 0.9" (10%) ISSUED
Boulder Current TO 1000 PM THU
0.1" (70%) to 0.3" (40%) to 0.9" (10%) ISSUED
Broomfield Current TO 1000 PM THU
0.1" (70%) to 0.3" (40%) to 0.9" (10%) ISSUED
Denver Current TO 1000 PM THU
0.1" (70%) to 0.3" (40%) to 0.9" (10%) ISSUED
Douglas Current TO 1000 PM THU
0.1" (70%) to 0.3" (40%) to 0.9" (10%) ISSUED
Jefferson Current TO 1000 PM THU
0.1" (70%) to 0.3" (40%) to 0.9" (10%) ISSUED
Foothills above 6500ft      
Boulder Current TO 1000 PM THU
0.1" (70%) to 0.3" (40%) to 0.9" (10%) ISSUED
Douglas Current TO 1000 PM THU
0.1" (80%) to 0.3" (40%) to 0.9" (10%) ISSUED
Jefferson Current TO 1000 PM THU
0.1" (80%) to 0.3" (40%) to 0.9" (10%) ISSUED
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.