Time: 926 AM Wed August 21, 2024 Forecaster: Laura Smith

Heavy Precipitation Outlook
Flash Flood Prediction Program

Isolated to Scattered Storms this afternoon and evening.
A more active pattern emerges today as a weak shortwave trough moves across far northwest Colorado. Isolated to scattered showers and thunderstorms are likely during the afternoon and evening, with a modest severe weather threat. High temperatures will be around 90°F with dewpoints in the upper 40s and precipitable water (PWAT) values around 0.75”. Storm motions will be from west to east around 15-20 mph broadly across the District.
STORM RAINFALL POTENTIAL AND DURATION: Showers and thunderstorms today have the potential to produce between a trace to 0.50” in 10-30 minutes.

WORST CASE SCENARIO: A strong thunderstorm may be capable of producing 0.75” or more in 30 minutes or less.

A LOOK AHEAD: Thursday will be similar to Wednesday, with scattered showers and thunderstorms expected throughout the day. Early convection may limit afternoon temperatures to the upper 80s across the plains. Better atmospheric moisture will support slightly higher rainfall amounts.

Location Prime Time 30-Minute Rainfall
and % Probability
Message
Potential
Plains      
Adams 100 PM TO 1000 PM
Trace (70%) to 0.25" (40%) to 0.5" (10%) LOW
Arapahoe 100 PM TO 1000 PM
Trace (70%) to 0.25" (40%) to 0.5" (10%) LOW
Boulder 100 PM TO 1000 PM
Trace (70%) to 0.25" (40%) to 0.5" (10%) LOW
Broomfield 100 PM TO 1000 PM
Trace (70%) to 0.25" (40%) to 0.5" (10%) LOW
Denver 100 PM TO 1000 PM
Trace (70%) to 0.25" (40%) to 0.5" (10%) LOW
Douglas 100 PM TO 1000 PM
Trace (70%) to 0.25" (40%) to 0.5" (10%) LOW
Jefferson 100 PM TO 1000 PM
Trace (70%) to 0.25" (40%) to 0.5" (10%) LOW
Foothills above 6500ft      
Boulder 100 PM TO 1000 PM
Trace (70%) to 0.25" (40%) to 0.5" (10%) LOW
Douglas 100 PM TO 1000 PM
Trace (70%) to 0.25" (40%) to 0.5" (10%) LOW
Jefferson 100 PM TO 1000 PM
Trace (70%) to 0.25" (40%) to 0.5" (10%) LOW
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.
https://f2p2.udfcd.org/generator/