Time: 836 PM Sat May 15, 2021 Forecaster: Justin Brooks

Internal Message Status
Flash Flood Prediction Program

MESSAGE 1s WILL BE ALLOWED TO EXPIRE AT 9:00 PM
-Message 1's will be allowed to expire at 9:00pm since the threat for heavy rainfall has come to an end.
-A few lingering rain showers will be possible over the next hour favoring southeastern portions of the District. Typical rain showers will likely produce TR-0.10" of total rainfall. Partly cloudy skies through the rest of the evening and overnight with lows dropping into the upper 40's on the plains with low 40's along the foothills. Excess surface moisture, with dewpoints currently hovering around 50, will result in foggy conditions this evening and into tomorrow morning.
-Tomorrow will start off cloudy and cool with another good chance for afternoon rain/thunderstorms with a slight chance of storms becoming severe. Dew points will rise back into the 50's, along with better upper level support, will bring a good chance for heavy rainfall tomorrow afternoon and evening.
STORM RAINFALL POTENTIAL AND DURATION: Typical rain showers could produce a TR-0.10" in 10-30 minutes.

WORST CASE SCENARIO: A slower moving rain shower could produce 0.10-0.20" in 10-30 minutes.

County Message Valid Times Prime Time
DIA 1 Current TO 900 PM Current TO 900 PM
Denver County 1 Current TO 900 PM Current TO 900 PM
Adams County 1 Current TO 900 PM Current TO 900 PM
Douglas County 1 Current TO 900 PM Current TO 900 PM
Broomfield County 1 Current TO 900 PM Current TO 900 PM
Jefferson County 1 Current TO 900 PM Current TO 900 PM
Boulder County 1 Current TO 900 PM Current TO 900 PM
Lakewood 1 Current TO 900 PM Current TO 900 PM
Wheat Ridge 1 Current TO 900 PM Current TO 900 PM
Arvada 1 Current TO 900 PM Current TO 900 PM
the City of Aurora 1 Current TO 900 PM Current TO 900 PM
Arapahoe County 1 Current TO 900 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 SAT
Trace (5%) to 0.1" (0%) to 0.2" (0%) NONE
Arapahoe Current TO 1000 PM SAT
Trace (20%) to 0.1" (10%) to 0.2" (5%) NONE
Boulder Current TO 1000 PM SAT
Trace (5%) to 0.1" (0%) to 0.2" (0%) NONE
Broomfield Current TO 1000 PM SAT
Trace (5%) to 0.1" (0%) to 0.2" (0%) NONE
Denver Current TO 1000 PM SAT
Trace (5%) to 0.1" (0%) to 0.2" (0%) NONE
Douglas Current TO 1000 PM SAT
Trace (30%) to 0.1" (15%) to 0.2" (5%) NONE
Jefferson Current TO 1000 PM SAT
Trace (5%) to 0.1" (0%) to 0.2" (0%) NONE
Foothills above 6500ft      
Boulder Current TO 1000 PM SAT
Trace (5%) to 0.1" (0%) to 0.2" (0%) NONE
Douglas Current TO 1000 PM SAT
Trace (20%) to 0.1" (10%) to 0.2" (5%) NONE
Jefferson Current TO 1000 PM SAT
Trace (5%) to 0.1" (0%) to 0.2" (0%) NONE
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.
https://f2p2.udfcd.org/generator/