Time: 510 PM Fri June 16, 2023 Forecaster: Brad Simmons

Internal Message Status
Flash Flood Prediction Program

MESSAGE 2’S CONTINUE VALID UNTIL 10:00 PM
Message 2’s (NWS Flood/Flash Flood Watch) will continue valid until 10:00 PM this evening.

Temperatures in the 50’s over the District are resulting in more of a widespread non-thunderstorm rain event currently and this trend is expected to continue into the evening. The threat for heavy rainfall from thunderstorms is now lower than earlier today. With a saturated ground in many areas light to moderate rain will continue to accumulate and produce runoff, filling smaller creeks and streams into the evening.

The scattered to numerous rain showers will continue likely through 8:00 or 9:00 PM, diminishing from W to E by around 10:00 PM or shortly after. Ahead of midnight dry conditions are expected to develop and continue for the remainder of the overnight period.
STORM RAINFALL POTENTIAL AND DURATION: Non-thunderstorm rain showers are producing rainfall rates of 0.1-0.5” in 30-60 minutes. Moderate rain showers may produce up to 1.0” in 45-60 minutes.

WORST CASE SCENARIO: Should a thunderstorm develop brief heavy rainfall of 0.5-1.5” in 10-30 minutes is possible.

County Message Valid Times Prime Time
Boulder County 2 1000 AM TO 1000 PM 1200 PM TO 900 PM
Jefferson County 2 1000 AM TO 1000 PM 1200 PM TO 900 PM
Broomfield County 2 1000 AM TO 1000 PM 1200 PM TO 900 PM
Douglas County 2 1000 AM TO 1000 PM 1200 PM TO 900 PM
Adams County 2 1000 AM TO 1000 PM 1200 PM TO 900 PM
Denver County 2 1000 AM TO 1000 PM 1200 PM TO 900 PM
DIA 2 1000 AM TO 1000 PM 1200 PM TO 900 PM
Arapahoe County 2 1000 AM TO 1000 PM 1200 PM TO 900 PM
the City of Aurora 2 1000 AM TO 1000 PM 1200 PM TO 900 PM
Arvada 2 1000 AM TO 1000 PM 1200 PM TO 900 PM
Wheat Ridge 2 1000 AM TO 1000 PM 1200 PM TO 900 PM
Lakewood 2 1000 AM TO 1000 PM 1200 PM TO 900 PM

County-specific Quantitative
Precipitation Outlook
Precipitation Time 60-Minute Rainfall
and % Probability
Message
Potential
Plains      
Adams Current TO 1000 PM FRI
0.1" (100%) to 0.5" (50%) to 1" (25%) ISSUED
Arapahoe Current TO 1000 PM FRI
0.1" (100%) to 0.5" (50%) to 1" (25%) ISSUED
Boulder Current TO 1000 PM FRI
0.1" (100%) to 0.5" (50%) to 1" (25%) ISSUED
Broomfield Current TO 1000 PM FRI
0.1" (100%) to 0.5" (50%) to 1" (25%) ISSUED
Denver Current TO 1000 PM FRI
0.1" (100%) to 0.5" (50%) to 1" (25%) ISSUED
Douglas Current TO 1000 PM FRI
0.1" (100%) to 0.5" (50%) to 1" (25%) ISSUED
Jefferson Current TO 1000 PM FRI
0.1" (100%) to 0.5" (50%) to 1" (25%) ISSUED
Foothills above 6500ft      
Boulder Current TO 1000 PM FRI
0.1" (100%) to 0.5" (50%) to 1" (25%) ISSUED
Douglas Current TO 1000 PM FRI
0.1" (100%) to 0.5" (50%) to 1" (25%) ISSUED
Jefferson Current TO 1000 PM FRI
0.1" (100%) to 0.5" (50%) to 1" (25%) ISSUED
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.
https://f2p2.udfcd.org/generator/