Flash Flood Prediction Program

Time: 945 AM Fri July 22, 2022 Forecaster: Brad Simmons ------------------------- Heavy Precipitation Outlook Flash Flood Prediction Program ------------------------- HOT AND GENERALLY DRY - Temperatures will tack on another degree or two today with afternoon highs topping out in the upper 90's to lower 100's over the plains. The record high for Denver today is 102 degrees. - Much like yesterday moisture is minimal with dew points lowering into the 30's resulting in a build up of clouds this afternoon and isolated high-based thunderstorms favoring the foothills and adjacent plains W of I-25. Storms that develop today will generally produce gusty winds and sprinkles over the plains with better chances for measurable rain in the foothills. Many areas will trend completely dry today. - Best chances for isolated thunderstorm coverage will be between 2-8pm. As sunset approaches any shower and thunderstorm activity will diminish with dry conditions for the later evening and overnight period. STORM RAINFALL POTENTIAL AND DURATION: Rain showers and weak thunderstorms will produce a trace to 0.2" of rain. A LOOK AHEAD: Remaining HOT on Saturday but moisture will begin to increase leading to a more active thunderstorm day. Widely scattered afternoon thunderstorms will be weak to moderate in nature with some storms producing measurable rain and providing some relief from the heat. A cold front will move through overnight Saturday cooling temperatures into the 80's on Sunday and increasing surface moisture leading to stronger thunderstorms with the potential to produce brief heavy rainfall. LOCATION PRIME TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams 200 PM TO 800 PM Trace (30%) to 0.1" (15%) to 0.2" (5%) NONE Arapahoe 200 PM TO 800 PM Trace (30%) to 0.1" (15%) to 0.2" (5%) NONE Boulder 200 PM TO 800 PM Trace (40%) to 0.1" (20%) to 0.2" (5%) NONE Broomfield 200 PM TO 800 PM Trace (30%) to 0.1" (15%) to 0.2" (5%) NONE Denver 200 PM TO 800 PM Trace (30%) to 0.1" (15%) to 0.2" (5%) NONE Douglas 200 PM TO 800 PM Trace (40%) to 0.1" (20%) to 0.2" (5%) NONE Jefferson 200 PM TO 800 PM Trace (40%) to 0.1" (20%) to 0.2" (5%) NONE Foothills above 6500ft       Boulder 100 PM TO 800 PM Trace (60%) to 0.1" (30%) to 0.2" (10%) NONE Douglas 100 PM TO 800 PM Trace (60%) to 0.1" (30%) to 0.2" (10%) NONE Jefferson 100 PM TO 800 PM Trace (60%) to 0.1" (30%) to 0.2" (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]