Time: 728 AM Fri May 12, 2023 Forecaster: Justin Brooks

Internal Message Status
Flash Flood Prediction Program

UPDATE FOR FLOOD WARNING BIG DRY CREEK & FLOWS INTO CHERRY CREEK RESEVOIR
Message 2's issued will continue valid through noon today.

The National Weather Service has updated the Big Dry Creek area to a Flood Warning due to excessive runoff leading to localized flooding. The area of impact will be from Thornton, Westminster and downstream to the confluence with the South Platte River near Fort Lupton. This Flood Warning will be in effect through 3pm this afternoon.

The National Weather Service has also upgraded the flows into Cherry Creek Reservoir to a Flood Warning as elevated water flows currently moving from the Douglas County area through Arapahoe County and into Cherry Creek. These elevated flows will likely have localized flooding, especially along any paths adjacent to creeks/rivers. This Flood Warning is also in effect through 3pm this afternoon.

The MHFD will advise through an IMS any additional Flood Warnings for this event if necessary.
STORM RAINFALL POTENTIAL AND DURATION: Light rain showers will produce rainfall rates of 0.1-0.3" in 60 minutes. Moderate to heavy non-thunderstorm rain showers will produce rainfall rates of 0.2-0.6" in 60 minutes.

WORST CASE SCENARIO: Training of moderate rain rain showers or a weak to moderate thunderstorm has the potential to produce rainfall amounts of 0.5-1.5" in 30-60 minutes.

County Message Valid Times Prime Time
Lakewood 2 Current TO 1159 AM Current TO 1000 AM
Wheat Ridge 2 Current TO 1159 AM Current TO 1000 AM
Arvada 2 Current TO 1159 AM Current TO 1000 AM
the City of Aurora 2 Current TO 1159 AM Current TO 1000 AM
Arapahoe County 2 Current TO 1159 AM Current TO 1000 AM
DIA 2 Current TO 1159 AM Current TO 1000 AM
Denver County 2 Current TO 1159 AM Current TO 1000 AM
Adams County 2 Current TO 1159 AM Current TO 1000 AM
Douglas County 2 Current TO 1159 AM Current TO 1000 AM
Broomfield County 2 Current TO 1159 AM Current TO 1000 AM
Jefferson County 2 Current TO 1159 AM Current TO 1000 AM
Boulder County 2 Current TO 1159 AM Current TO 1000 AM

County-specific Quantitative
Precipitation Outlook
Precipitation Time 60-Minute Rainfall
and % Probability
Message
Potential
Plains      
Adams Current TO 1159 AM FRI
0.1" (90%) to 0.3" (45%) to 0.8" (20%) ISSUED
Arapahoe Current TO 1159 AM FRI
0.1" (90%) to 0.3" (45%) to 0.8" (20%) ISSUED
Boulder Current TO 1159 AM FRI
0.1" (90%) to 0.3" (45%) to 0.8" (20%) ISSUED
Broomfield Current TO 1159 AM FRI
0.1" (90%) to 0.3" (45%) to 0.8" (20%) ISSUED
Denver Current TO 1159 AM FRI
0.1" (90%) to 0.3" (45%) to 0.8" (20%) ISSUED
Douglas Current TO 1159 AM FRI
0.1" (90%) to 0.3" (45%) to 0.8" (20%) ISSUED
Jefferson Current TO 1159 AM FRI
0.1" (90%) to 0.3" (45%) to 0.8" (20%) ISSUED
Foothills above 6500ft      
Boulder Current TO 1159 AM FRI
0.1" (80%) to 0.3" (40%) to 0.8" (10%) ISSUED
Douglas Current TO 1159 AM FRI
0.1" (80%) to 0.3" (40%) to 0.8" (10%) ISSUED
Jefferson Current TO 1159 AM FRI
0.1" (80%) to 0.3" (40%) to 0.8" (10%) ISSUED
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.
https://f2p2.udfcd.org/generator/