Time: 817 AM Tue September 13, 2022 Forecaster: Justin Brooks ------------------------- Heavy Precipitation Outlook Flash Flood Prediction Program ------------------------- HOT, HAZY, BREEZY AND GENERALLY DRY - High-pressure will hold today leading to another day with above average temperatures as we once again flirt with 90 degrees this afternoon. Hazy conditions will increase today, especially for northern Colorado as wildfire smoke continues to increase from the west moves into the region today. Winds will likely pick up through the day as well with gust up to 25mph from the SSE this afternoon. - Clouds will be on the increase this afternoon as remnants from a tropical storm start to move into the region from the SW. This will bring a very slight chance for a few scattered rain showers/isolated thunderstorms. However, with very dry conditions at the surface, with dew points currently in the upper 20's, most if not all precipitation will struggle to reach the surface today. The best chance for any shower activity will be from 2-9pm, favoring the higher terrain along the foothills and Palmer Divide at this time. - Mild and dry conditions are expected through the overnight as temperatures drop into the mid 50's to low 60's on the plains with to low to mid 50's along the foothills. STORM RAINFALL POTENTIAL AND DURATION: Typical rain showers/isolated thunderstorms will produce a trace to 0.1" in 10-30 minutes. A moderate rain shower/isolated thunderstorm could produce 0.1-0.3" in 10-30 minutes. WORST CASE SCENARIO: A moderate to strong rain shower/thunderstorm is able to develop and will have the potential to produce 0.3-0.8" in 45-60 minutes. A LOOK AHEAD: An uptick in moisture both at the surface an upper-levels tomorrow will bring a better chance for widespread rain showers/isolated thunderstorms, with the best chance for storm activity tomorrow afternoon and evening. A slight chance rain showers stick around through the overnight and into Thursday. Tomorrow's high temperatures will drop into a more seasonable low 80's. Slightly cooler Thursday with highs in the upper 70's to low 80's with another chance for afternoon/eve rain showers/isolated thunderstorms with a slight chance for overnight rain showers into Friday. Friday starts to warm back into the low 80's with a slight chance for a few afternoon rain showers/isolated thunderstorms, with skies clearing into the evening. LOCATION PRIME TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams 200 PM TO 900 PM Trace (20%) to 0.1" (10%) to 0.3" (5%) NONE Arapahoe 200 PM TO 900 PM Trace (20%) to 0.1" (10%) to 0.3" (5%) NONE Boulder 200 PM TO 900 PM Trace (20%) to 0.1" (10%) to 0.3" (5%) NONE Broomfield 200 PM TO 900 PM Trace (20%) to 0.1" (10%) to 0.3" (5%) NONE Denver 200 PM TO 900 PM Trace (20%) to 0.1" (10%) to 0.3" (5%) NONE Douglas 200 PM TO 900 PM Trace (20%) to 0.1" (10%) to 0.3" (5%) NONE Jefferson 200 PM TO 900 PM Trace (20%) to 0.1" (10%) to 0.3" (5%) NONE Foothills above 6500ft       Boulder 200 PM TO 900 PM Trace (30%) to 0.1" (15%) to 0.3" (10%) NONE Douglas 200 PM TO 900 PM Trace (30%) to 0.1" (15%) to 0.3" (10%) NONE Jefferson 200 PM TO 900 PM Trace (30%) to 0.1" (15%) to 0.3" (10%) NONE MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS. MHFD Flood Prediction Center: 303-458-0789    F2P2 Website [http://udfcd.org/Flash+Flood+Prediction+Program]