Time: 927 AM Tue August 23, 2022 Forecaster: Laura Smith ------------------------- Heavy Precipitation Outlook Flash Flood Prediction Program ------------------------- MOSTLY SUNNY WITH A SLIGHT CHANCE FOR ISOLATED SHOWERS AND THUNDERSTORMS - Northwesterly upper-level flow aloft will continue today, creating warm conditions with highs in the mid to upper 80's, dew points in the mid to upper 40's, by this afternoon. A dryer airmass is moving over the District today, limiting chances for shower and thunderstorm activity. - PW values are expected to range from 0.5 to 0.7 inches, with most shower and thunderstorm activity expected across complex terrain. However, a small chance remains for a few rain showers/isolated thunderstorms across the District between 1PM-7PM. Like yesterday, storm motions will be slow, between 5-10mph from the NW to SE. - Overnight, skies will gradually clear with mild conditions expected. Lows will drop into the upper 50's to low 60's. STORM RAINFALL POTENTIAL AND DURATION: Rain showers today will produce a trace to 0.5 inches of rainfall in 10 to 30 minutes. WORST CASE SCENARIO: A slow-moving or anchored rain shower/thunderstorm will have the potential to produce 0.5-0.8 inches in 10 to 30 minutes. A LOOK AHEAD: High pressure ridging over the intermountain west will create warm conditions across the Front Range Urban Corridor throughout the week. Tomorrow will be similar to conditions today with highs in the mid 80s to around 90 degrees and a slight chance for isolated thunderstorm activity. By the end of the week, an upper-level disturbance over the Pacific Northwest will transport a plume of moisture into the region, supporting increased thunderstorm activity. On Thursday and Friday, scattered showers and thunderstorms are likely as temperatures reach the mid 80s. LOCATION PRIME TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams 100 PM TO 700 PM Trace (30%) to 0.2" (20%) to 0.5" (10%) LOW Arapahoe 100 PM TO 700 PM Trace (30%) to 0.2" (20%) to 0.5" (10%) LOW Boulder 100 PM TO 700 PM Trace (30%) to 0.2" (20%) to 0.5" (10%) LOW Broomfield 100 PM TO 700 PM Trace (30%) to 0.2" (20%) to 0.5" (10%) LOW Denver 100 PM TO 700 PM Trace (30%) to 0.2" (20%) to 0.5" (10%) LOW Douglas 100 PM TO 700 PM Trace (30%) to 0.2" (20%) to 0.5" (10%) LOW Jefferson 100 PM TO 700 PM Trace (30%) to 0.2" (20%) to 0.5" (10%) LOW Foothills above 6500ft       Boulder 100 PM TO 700 PM Trace (50%) to 0.2" (25%) to 0.5" (10%) LOW Douglas 100 PM TO 700 PM Trace (50%) to 0.2" (25%) to 0.5" (10%) LOW Jefferson 100 PM TO 700 PM Trace (50%) to 0.2" (25%) to 0.5" (10%) LOW MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS. MHFD Flood Prediction Center: 303-458-0789    F2P2 Website [http://udfcd.org/Flash+Flood+Prediction+Program]