Time: 255 AM Fri June 30, 2023 Forecaster: Justin Brooks

Internal Message Status
Flash Flood Prediction Program

MESSAGE 1’S WILL BE ALLOWED TO EXPIRE AT 4AM
Message 1’s will be allowed to expire at 4am as the threat for heavy rainfall has come to an end.

A few linger showers/isolated thunderstorms are impacting eastern portions of the District at this time, but should be out of the District by 4am. Minimal to no additional shower activity is expected through daybreak, however with elevated surface moisture in place, a LOW chance for Messages to be issued through daybreak.

Another good chance for storms this afternoon. The best chance currently will be between noon and 5pm with skies likely clearing into the evening. Once again some of these storms could become severe, bringing large hail, gusty winds, and possibly an isolated tornado, favoring areas east of I-25.
STORM RAINFALL POTENTIAL AND DURATION: Typical rain showers will produce a trace to 0.20” total in 10-30 minutes. A weak to moderate thunderstorm could produce 0.20-0.50” total in 10-30 minutes.

WORST CASE SCENARIO: A stronger cell is able to develop and will have the potential to produce up to 1” in 45-60 minutes.

County Message Valid Times Prime Time
Lakewood 1 Current TO 400 AM Current TO 330 AM
Wheat Ridge 1 Current TO 400 AM Current TO 330 AM
Arvada 1 Current TO 400 AM Current TO 330 AM
the City of Aurora 1 Current TO 400 AM Current TO 330 AM
Arapahoe County 1 Current TO 400 AM Current TO 330 AM
DIA 1 Current TO 400 AM Current TO 330 AM
Denver County 1 Current TO 400 AM Current TO 330 AM
Adams County 1 Current TO 400 AM Current TO 330 AM
Douglas County 1 Current TO 400 AM Current TO 330 AM
Broomfield County 1 Current TO 400 AM Current TO 330 AM
Jefferson County 1 Current TO 400 AM Current TO 330 AM
Boulder County 1 Current TO 400 AM Current TO 330 AM

County-specific Quantitative
Precipitation Outlook
Precipitation Time 30-Minute Rainfall
and % Probability
Message
Potential
Plains      
Adams Current TO 700 AM FRI
Trace (20%) to 0.2" (10%) to 0.5" (10%) LOW
Arapahoe Current TO 700 AM FRI
Trace (20%) to 0.2" (10%) to 0.5" (10%) LOW
Boulder Current TO 700 AM FRI
Trace (20%) to 0.2" (10%) to 0.5" (10%) LOW
Broomfield Current TO 700 AM FRI
Trace (20%) to 0.2" (10%) to 0.5" (10%) LOW
Denver Current TO 700 AM FRI
Trace (20%) to 0.2" (10%) to 0.5" (10%) LOW
Douglas Current TO 700 AM FRI
Trace (20%) to 0.2" (10%) to 0.5" (10%) LOW
Jefferson Current TO 700 AM FRI
Trace (20%) to 0.2" (10%) to 0.5" (10%) LOW
Foothills above 6500ft      
Boulder Current TO 700 AM FRI
Trace (20%) to 0.2" (10%) to 0.5" (10%) LOW
Douglas Current TO 700 AM FRI
Trace (20%) to 0.2" (10%) to 0.5" (10%) LOW
Jefferson Current TO 700 AM FRI
Trace (20%) to 0.2" (10%) to 0.5" (10%) LOW
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.
https://f2p2.udfcd.org/generator/