Time: 158 AM Tue May 28, 2019 Forecaster: Alan Smith

Internal Message Status
Flash Flood Prediction Program

MESSAGES HAVE BEEN EXTENDED UNTIL 3:00AM
-Message 1's have been extended until 3:00am for the entire District.
-Thunderstorms continue to impact northern portions of the District. Recent storms have been producing more hail than rain, but if hail subsides then the potential for heavy rain will exist over the next hour.
-Strong thunderstorms will exit the District within the next hour. Additional showers and weak thunderstorms could redevelop during the remainder of the overnight period, but the potential for heavy rainfall will diminish after 3:00am.
STORM RAINFALL POTENTIAL AND DURATION: Weak to moderate thunderstorms will produce rainfall amounts of 0.1-0.3" in 10-30 minutes. Strong thunderstorms will be capable of producing heavy rainfall of 0.3-0.7" in 10-30 minutes.

WORST CASE SCENARIO: Training of thunderstorm cells results in heavy rainfall of up to 1.0" in 45-60 minutes.

County Message Valid Times Prime Time
Boulder County 1 Current TO 300 AM Current TO 230 AM
Jefferson County 1 Current TO 300 AM Current TO 230 AM
Broomfield County 1 Current TO 300 AM Current TO 230 AM
Douglas County 1 Current TO 300 AM Current TO 230 AM
Adams County 1 Current TO 300 AM Current TO 230 AM
Denver County 1 Current TO 300 AM Current TO 230 AM
DIA 1 Current TO 300 AM Current TO 230 AM
Arapahoe County 1 Current TO 300 AM Current TO 230 AM
the City of Aurora 1 Current TO 300 AM Current TO 230 AM
Arvada 1 Current TO 300 AM Current TO 230 AM
Wheat Ridge 1 Current TO 300 AM Current TO 230 AM
Lakewood 1 Current TO 300 AM Current TO 230 AM

County-specific Quantitative
Precipitation Outlook
Precipitation Time 30-Minute Rainfall
and % Probability
Message
Potential
Plains      
Adams Current TO 300 AM TUE
Trace (100%) to 0.3" (50%) to 0.7" (20%) ISSUED
Arapahoe Current TO 300 AM TUE
Trace (80%) to 0.3" (30%) to 0.7" (10%) ISSUED
Boulder Current TO 300 AM TUE
Trace (100%) to 0.3" (50%) to 0.7" (20%) ISSUED
Broomfield Current TO 300 AM TUE
Trace (100%) to 0.3" (50%) to 0.7" (20%) ISSUED
Denver Current TO 300 AM TUE
Trace (100%) to 0.3" (50%) to 0.7" (20%) ISSUED
Douglas Current TO 300 AM TUE
Trace (80%) to 0.3" (30%) to 0.7" (10%) ISSUED
Jefferson Current TO 300 AM TUE
Trace (100%) to 0.3" (50%) to 0.7" (20%) ISSUED
Foothills above 6500ft      
Boulder Current TO 300 AM TUE
Trace (100%) to 0.3" (50%) to 0.7" (20%) ISSUED
Douglas Current TO 300 AM TUE
Trace (80%) to 0.3" (30%) to 0.7" (10%) ISSUED
Jefferson Current TO 300 AM TUE
Trace (100%) to 0.3" (50%) to 0.7" (20%) ISSUED
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.