Time: 338 PM Sun May 30, 2021 Forecaster: Brad Simmons

Internal Message Status
Flash Flood Prediction Program

MESSAGE 1'S CONTINUE VALID FOR THE DISTRICT
-Message 1's will continue valid through 11pm as a widespread rain falls over the District.
-Rain showers with embedded weak to briefly moderate thunderstorms impacted the District earlier with recent trends showing a decrease in thunderstorm activity and a transition to a soaking stratiform rain. A widespread and fairly steady rain is expected to continue for the next few hours before before becoming more scattered and eventually isolated as the evening progresses. Smaller creeks and streams will be running high into the evening. Cherry Creek in Denver will likely experience bike path inundation at times.
-Rainfall rates from non-thunderstorm light to moderate rain showers is currently in the 0.1-0.3"/hr rate. Rainfall rates are expected to remain steady and then slowly taper off this evening. Should a thunderstorm develop it will have the potential to produce brief heavy rainfall.
STORM RAINFALL POTENTIAL AND DURATION: Rain showers will produce rainfall rates of 0.1-0.4"/hr. Weak thunderstorms will have the potential to produce 0.2-0.6" in 10-30 minutes.

WORST CASE SCENARIO: Moderate to strong thunderstorms will have the potential to produce 0.4-1.2" in 15-45 minutes.

County Message Valid Times Prime Time
Boulder County 1 Current TO 1100 PM Current TO 1000 PM
Jefferson County 1 Current TO 1100 PM Current TO 1000 PM
Broomfield County 1 Current TO 1100 PM Current TO 1000 PM
Douglas County 1 Current TO 1100 PM Current TO 1000 PM
Adams County 1 Current TO 1100 PM Current TO 1000 PM
Denver County 1 Current TO 1100 PM Current TO 1000 PM
DIA 1 Current TO 1100 PM Current TO 1000 PM
Arapahoe County 1 Current TO 1100 PM Current TO 1000 PM
the City of Aurora 1 Current TO 1100 PM Current TO 1000 PM
Arvada 1 Current TO 1100 PM Current TO 1000 PM
Wheat Ridge 1 Current TO 1100 PM Current TO 1000 PM
Lakewood 1 Current TO 1100 PM Current TO 1000 PM

County-specific Quantitative
Precipitation Outlook
Precipitation Time 60-Minute Rainfall
and % Probability
Message
Potential
Plains      
Adams Current TO 1100 PM SUN
0.1" (100%) to 0.3" (75%) to 0.6" (25%) ISSUED
Arapahoe Current TO 1100 PM SUN
0.1" (100%) to 0.3" (75%) to 0.6" (25%) ISSUED
Boulder Current TO 1100 PM SUN
0.1" (100%) to 0.3" (75%) to 0.6" (25%) ISSUED
Broomfield Current TO 1100 PM SUN
0.1" (100%) to 0.3" (75%) to 0.6" (25%) ISSUED
Denver Current TO 1100 PM SUN
0.1" (100%) to 0.3" (75%) to 0.6" (25%) ISSUED
Douglas Current TO 1100 PM SUN
0.1" (100%) to 0.3" (75%) to 0.6" (25%) ISSUED
Jefferson Current TO 1100 PM SUN
0.1" (100%) to 0.3" (75%) to 0.6" (25%) ISSUED
Foothills above 6500ft      
Boulder Current TO 1100 PM SUN
0.1" (100%) to 0.3" (75%) to 0.6" (25%) ISSUED
Douglas Current TO 1100 PM SUN
0.1" (100%) to 0.3" (75%) to 0.6" (25%) ISSUED
Jefferson Current TO 1100 PM SUN
0.1" (100%) to 0.3" (75%) to 0.6" (25%) ISSUED
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.
https://f2p2.udfcd.org/generator/