Time: 621 PM Sun June 16, 2019 Forecaster: Brad Simmons

Internal Message Status
Flash Flood Prediction Program

MESSAGES WILL CONTINUE VALID
-Message 1's will continue valid through 10:00 PM this evening
-Multiple rounds of showers and thunderstorms have moved through the District this afternoon producing pockets of heavy rainfall. There is currently a lull over the majority of the District at this time with some lingering storms far E/SE, but will be moving out of the District shortly.
-An additional round of showers and thunderstorms will be possible early this evening but the threat for heavy rainfall has begun to decrease now that the atmosphere has been churned and surface temperatures have fallen into the upper 60's to lower 70's.
STORM RAINFALL POTENTIAL AND DURATION: Thunderstorms will be capable of producing rainfall amounts of 0.2-0.6+" in 10-30 minutes.

WORST CASE SCENARIO: A strong thunderstorm could stall along a wind convergence boundary and produce heavy rainfall of up to 1.2" in 45-75 minutes.

County Message Valid Times Prime Time
Boulder County 1 Current TO 1000 PM Current TO 900 PM
Jefferson County 1 Current TO 1000 PM Current TO 900 PM
Broomfield County 1 Current TO 1000 PM Current TO 900 PM
Douglas County 1 Current TO 1000 PM Current TO 900 PM
Adams County 1 Current TO 1000 PM Current TO 900 PM
Denver County 1 Current TO 1000 PM Current TO 900 PM
DIA 1 Current TO 1000 PM Current TO 900 PM
Arapahoe County 1 Current TO 1000 PM Current TO 900 PM
the City of Aurora 1 Current TO 1000 PM Current TO 900 PM
Arvada 1 Current TO 1000 PM Current TO 900 PM
Wheat Ridge 1 Current TO 1000 PM Current TO 900 PM
Lakewood 1 Current TO 1000 PM Current TO 900 PM

County-specific Quantitative
Precipitation Outlook
Precipitation Time 30-Minute Rainfall
and % Probability
Message
Potential
Plains      
Adams Current TO 1000 PM SUN
Trace (75%) to 0.2" (50%) to 0.6" (15%) ISSUED
Arapahoe Current TO 1000 PM SUN
Trace (75%) to 0.2" (50%) to 0.6" (15%) ISSUED
Boulder Current TO 1000 PM SUN
Trace (75%) to 0.2" (50%) to 0.6" (15%) ISSUED
Broomfield Current TO 1000 PM SUN
Trace (75%) to 0.2" (50%) to 0.6" (15%) ISSUED
Denver Current TO 1000 PM SUN
Trace (75%) to 0.2" (50%) to 0.6" (15%) ISSUED
Douglas Current TO 1000 PM SUN
Trace (75%) to 0.2" (50%) to 0.6" (15%) ISSUED
Jefferson Current TO 1000 PM SUN
Trace (75%) to 0.2" (50%) to 0.6" (15%) ISSUED
Foothills above 6500ft      
Boulder Current TO 1000 PM SUN
Trace (75%) to 0.2" (50%) to 0.6" (15%) ISSUED
Douglas Current TO 1000 PM SUN
Trace (75%) to 0.2" (50%) to 0.6" (15%) ISSUED
Jefferson Current TO 1000 PM SUN
Trace (75%) to 0.2" (50%) to 0.6" (15%) ISSUED
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.