Time: 901 AM Tue August 2, 2022 Forecaster: Brad Simmons ------------------------- Heavy Precipitation Outlook Flash Flood Prediction Program ------------------------- CONTINUED HOT WITH WIDELY SCATTERED AFTERNOON THUNDERSTORMS - Temperatures will continue to run above normal today over the District with afternoon highs topping out in the low to mid 90's over the plains. Normal high for Denver today is 90 degrees. An upper level disturbance and weak cool front will move through this afternoon producing widely scattered showers and thunderstorms. - Moisture will increase in the mid and upper levels but at the surface moisture is somewhat lacking resulting in storms that develop today mainly producing light to briefly moderate rain and breezy winds. 1-2 rounds of showers and thunderstorms are expected into the evening between 1-8pm. - Upper level steering winds will be from W to E between 10-20mph keeping the storms moving along and rainfall brief in duration. After 8pm the chances for thunderstorms diminish with possibly an isolated rain shower or two remaining possible until 9 or 10pm. STORM RAINFALL POTENTIAL AND DURATION: Rain showers and weak thunderstorms will produce a trace to 0.2". Moderate thunderstorms will have the potential to produce rainfall rates of 0.1-0.4" in 10-30 minutes. WORST CASE SCENARIO: Moisture increases further than anticipated this afternoon behind a cold front resulting in stronger thunderstorms with the potential to produce rainfall rates of 0.2-0.6" in 10-30 minutes and and up to 0.9" in 60 minutes. A LOOK AHEAD: Cooler Wednesday behind the cold front with temperatures more seasonal as highs will be either side of 90 degrees over the plains. Good chances for thunderstorms will continue over the foothills and Palmer Divide but only isolated coverage is expected over the plains. LOCATION PRIME TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams 100 PM TO 800 PM Trace (75%) to 0.2" (50%) to 0.4" (20%) NONE Arapahoe 100 PM TO 800 PM Trace (75%) to 0.2" (50%) to 0.4" (20%) NONE Boulder 100 PM TO 800 PM Trace (75%) to 0.2" (50%) to 0.4" (20%) NONE Broomfield 100 PM TO 800 PM Trace (75%) to 0.2" (50%) to 0.4" (20%) NONE Denver 100 PM TO 800 PM Trace (75%) to 0.2" (50%) to 0.4" (20%) NONE Douglas 100 PM TO 800 PM Trace (75%) to 0.2" (50%) to 0.4" (20%) NONE Jefferson 100 PM TO 800 PM Trace (75%) to 0.2" (50%) to 0.4" (20%) NONE Foothills above 6500ft       Boulder 1200 PM TO 800 PM Trace (85%) to 0.2" (60%) to 0.4" (25%) LOW Douglas 1200 PM TO 800 PM Trace (85%) to 0.2" (60%) to 0.4" (25%) LOW Jefferson 1200 PM TO 800 PM Trace (85%) to 0.2" (60%) to 0.4" (25%) 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]