Time: 139 PM Sat June 22, 2019 Forecaster: Brad Simmons

Internal Message Status
Flash Flood Prediction Program

MESSAGE 1'S ISSUED FOR THE ENTIRE DISTRICT
-Message 1's have been issued for the entire District and will be valid until 10:00 PM this evening.
-Scattered to numerous rain showers and thunderstorms will move through the District through the afternoon and evening. Moderate to strong thunderstorms will be capable of producing heavy rainfall which may lead to excessive runoff and possibly flash flooding.
-Storms will move fairly briskly from SW to NE at 20-30 mph helping to reduce point rainfall amounts from a single storm. Training of thunderstorm cells or a large slower moving thunderstorm will be the main culprits today for extended periods of heavy rainfall.
STORM RAINFALL POTENTIAL AND DURATION: Moderate to strong thunderstorms will produce 0.3-0.9" of rain in 10-30 minutes.

WORST CASE SCENARIO: Training of thunderstorm cells or a large slower moving thunderstorm may produce up to 1.8" in 60-90 minutes.

County Message Valid Times Prime Time
Boulder County 1 Current TO 1000 PM 230 PM TO 900 PM
Jefferson County 1 Current TO 1000 PM 230 PM TO 900 PM
Broomfield County 1 Current TO 1000 PM 230 PM TO 900 PM
Douglas County 1 Current TO 1000 PM 230 PM TO 900 PM
Adams County 1 Current TO 1000 PM 230 PM TO 900 PM
Denver County 1 Current TO 1000 PM 230 PM TO 900 PM
DIA 1 Current TO 1000 PM 230 PM TO 900 PM
Arapahoe County 1 Current TO 1000 PM 230 PM TO 900 PM
the City of Aurora 1 Current TO 1000 PM 230 PM TO 900 PM
Arvada 1 Current TO 1000 PM 230 PM TO 900 PM
Wheat Ridge 1 Current TO 1000 PM 230 PM TO 900 PM
Lakewood 1 Current TO 1000 PM 230 PM TO 900 PM

County-specific Quantitative
Precipitation Outlook
Precipitation Time 30-Minute Rainfall
and % Probability
Message
Potential
Plains      
Adams Current TO 1000 PM SAT
0.1" (95%) to 0.4" (65%) to 0.9" (30%) ISSUED
Arapahoe Current TO 1000 PM SAT
0.1" (95%) to 0.4" (65%) to 0.9" (30%) ISSUED
Boulder Current TO 1000 PM SAT
0.1" (95%) to 0.4" (65%) to 0.9" (30%) ISSUED
Broomfield Current TO 1000 PM SAT
0.1" (95%) to 0.4" (65%) to 0.9" (30%) ISSUED
Denver Current TO 1000 PM SAT
0.1" (95%) to 0.4" (65%) to 0.9" (30%) ISSUED
Douglas Current TO 1000 PM SAT
0.1" (95%) to 0.4" (65%) to 0.9" (30%) ISSUED
Jefferson Current TO 1000 PM SAT
0.1" (95%) to 0.4" (65%) to 0.9" (30%) ISSUED
Foothills above 6500ft      
Boulder Current TO 1000 PM SAT
0.1" (100%) to 0.4" (70%) to 0.9" (30%) ISSUED
Douglas Current TO 1000 PM SAT
0.1" (100%) to 0.4" (70%) to 0.9" (30%) ISSUED
Jefferson Current TO 1000 PM SAT
0.1" (100%) to 0.4" (70%) to 0.9" (30%) ISSUED
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.