Time: 853 AM Sat August 26, 2023 Forecaster: Laura Smith

Heavy Precipitation Outlook
Flash Flood Prediction Program

ISOLATED AFTERNOON SHOWERS AND THUNDERSTORMS
As the upper-level disturbance conditions continue to shift east, the remnants of a tropical system will expand across the state. This wave of moisture will support cooler temperatures and rainy conditions through the weekend. Isolated storm activity is possible across the Plains today with afternoon temperatures in the mid 70s, dew points in the upper 40s to around 50°F. Downsloping winds will help limit storm development on the plains. Storms will travel from west to east around 20-25 mph. Showers and thunderstorms are expected to dissipate this evening.
STORM RAINFALL POTENTIAL AND DURATION: Typical showers will be weak, producing rainfall of TR-0.25” total in 10-30 minutes. Stronger storms have the potential to produce rainfall of 0.25” to 0.50” total in 10-30 minutes.

WORST CASE SCENARIO: Strong thunderstorms have the potential to produce 0.50” to 0.75” total in 30-60 minutes.

A LOOK AHEAD: Another wave of afternoon thunderstorms is possible tomorrow as temperatures warm into the low to mid 80s. There is still some uncertainty about details and timing through the weekend, which will depend on the track of this system. We will continue to monitor conditions as they develop over the coming days.

Location Prime Time 30-Minute Rainfall
and % Probability
Message
Potential
Plains      
Adams 200 PM TO 1000 PM
Trace (80%) to 0.25" (50%) to 0.5" (20%) LOW
Arapahoe 200 PM TO 1000 PM
Trace (80%) to 0.25" (50%) to 0.5" (20%) LOW
Boulder 200 PM TO 1000 PM
Trace (80%) to 0.25" (50%) to 0.5" (20%) LOW
Broomfield 200 PM TO 1000 PM
Trace (80%) to 0.25" (50%) to 0.5" (20%) LOW
Denver 200 PM TO 1000 PM
Trace (80%) to 0.25" (50%) to 0.5" (20%) LOW
Douglas 200 PM TO 1000 PM
Trace (80%) to 0.25" (50%) to 0.5" (20%) LOW
Jefferson 200 PM TO 1000 PM
Trace (80%) to 0.25" (50%) to 0.5" (20%) LOW
Foothills above 6500ft      
Boulder 200 PM TO 1000 PM
Trace (80%) to 0.25" (50%) to 0.5" (20%) LOW
Douglas 200 PM TO 1000 PM
Trace (80%) to 0.25" (50%) to 0.5" (20%) LOW
Jefferson 200 PM TO 1000 PM
Trace (80%) to 0.25" (50%) to 0.5" (20%) LOW
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.
https://f2p2.udfcd.org/generator/