Time: 1102 PM Tue July 4, 2023 Forecaster: Justin Brooks

Internal Message Status
Flash Flood Prediction Program

MESSAGE 1'S HAVE BEEN EXTENDED FOR THE DISTRICT UNTIL 2AM
Message 1’s have been extended until 2am as the threat for heavy rain continues.

Multiple rounds of showers and thunderstorms continue to impact the District at this time. These showers and thunderstorms will continue over the next few hours with a heavy rainfall threat. Storms currently produce a quick 0.5-1.25” in 10-30 minutes. This type of rainfall will continue through midnight and should start to decrease by 2am.

Additional storms possible through daybreak, however the heavy rain should be less a threat after 2am. Overnight off and on rain showers possible as lows drop into the low to mid 50’s.
STORM RAINFALL POTENTIAL AND DURATION: Typical rain showers/thunderstorms will produce 0.25-0.50” total, in 10-30 minutes. A moderate to strong thunderstorm will result in 0.50-1.25” total, in 10-30 minutes.

WORST CASE SCENARIO: A strong, stationary thunderstorm has the potential to produce up to 2.0 in 45-60 minutes.

County Message Valid Times Prime Time
Boulder County 1 Current TO 200 AM WEDNESDAY Current TO 130 AM WEDNESDAY
Jefferson County 1 Current TO 200 AM WEDNESDAY Current TO 130 AM WEDNESDAY
Broomfield County 1 Current TO 200 AM WEDNESDAY Current TO 130 AM WEDNESDAY
Douglas County 1 Current TO 200 AM WEDNESDAY Current TO 130 AM WEDNESDAY
Adams County 1 Current TO 200 AM WEDNESDAY Current TO 130 AM WEDNESDAY
Denver County 1 Current TO 200 AM WEDNESDAY Current TO 130 AM WEDNESDAY
DIA 1 Current TO 200 AM WEDNESDAY Current TO 130 AM WEDNESDAY
Arapahoe County 1 Current TO 200 AM WEDNESDAY Current TO 130 AM WEDNESDAY
the City of Aurora 1 Current TO 200 AM WEDNESDAY Current TO 130 AM WEDNESDAY
Arvada 1 Current TO 200 AM WEDNESDAY Current TO 130 AM WEDNESDAY
Wheat Ridge 1 Current TO 200 AM WEDNESDAY Current TO 130 AM WEDNESDAY
Lakewood 1 Current TO 200 AM WEDNESDAY Current TO 130 AM WEDNESDAY

County-specific Quantitative
Precipitation Outlook
Precipitation Time 30-Minute Rainfall
and % Probability
Message
Potential
Plains      
Adams Current TO 200 AM WED
0.25" (75%) to 0.5" (50%) to 1.25" (25%) ISSUED
Arapahoe Current TO 200 AM WED
0.25" (75%) to 0.5" (50%) to 1.25" (25%) ISSUED
Boulder Current TO 200 AM WED
0.25" (75%) to 0.5" (50%) to 1.25" (25%) ISSUED
Broomfield Current TO 200 AM WED
0.25" (75%) to 0.5" (50%) to 1.25" (25%) ISSUED
Denver Current TO 200 AM WED
0.25" (75%) to 0.5" (50%) to 1.25" (25%) ISSUED
Douglas Current TO 200 AM WED
0.25" (75%) to 0.5" (50%) to 1.25" (25%) ISSUED
Jefferson Current TO 200 AM WED
0.25" (75%) to 0.5" (50%) to 1.25" (25%) ISSUED
Foothills above 6500ft      
Boulder Current TO 200 AM WED
0.25" (75%) to 0.5" (50%) to 1.25" (25%) ISSUED
Douglas Current TO 200 AM WED
0.25" (75%) to 0.5" (50%) to 1.25" (25%) ISSUED
Jefferson Current TO 200 AM WED
0.25" (75%) to 0.5" (50%) to 1.25" (25%) ISSUED
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.
https://f2p2.udfcd.org/generator/