Time: 904 AM Sun May 22, 2022 Forecaster: Brad Simmons ------------------------- Heavy Precipitation Outlook Flash Flood Prediction Program ------------------------- REMAINING UNSEASONABLY COOL WITH SHOWERS AND THUNDERSTORMS THIS AFTERNOON/EVENING - Trough of low pressure remain in place over the state keeping the weather a little unsettled today over the District. Temperatures in the 40's over the plains currently will warm into the 50's to lower 60's this afternoon with readings 10-15 degrees cooler in the Front Range foothills. Normal high for Denver today is 74 degrees. Conditions will be generally dry this morning outside a few isolated mix/snow showers over far S Jefferson and Douglas Counties. - Rain showers and possibly weak thunderstorms will begin to develop over the foothills and Palmer Divide between noon-2pm. Chances will increase for shower coverage over the plains after 2pm. There will then be isolated to widely scattered rain showers and weak thunderstorms possible into the evening. With the cooler temperatures precipitation will likely favor general rain with any thunderstorms being weak but capable of small hail with the low freezing levels. - Best chances for precipitation will be through about 10pm but a few lingering rain showers may persist overnight with some wet snow for the foothills, mainly above 8,000ft. Tonight temperatures will drop into the mid 30s to around 40 over the plains. STORM RAINFALL POTENTIAL AND DURATION: Rain showers will produce a trace to 0.1" of rain in 30 minutes. Weak thunderstorms will have the potential to produce 0.1-0.3" of rain in 10-30 minutes. A LOOK AHEAD: Temperatures will tack on a few degrees to afternoon highs on Monday with readings in the 60's most areas over the plains. Monday morning will trend generally dry but by noon showers and weak thunderstorms will become likely. A modest chance for showers/weak thunderstorms will continue into Monday evening with additional rain showers expected overnight with some snow possible in the foothills (mainly above 8,000ft). LOCATION PRIME TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams 200 PM TO 1000 PM Trace (90%) to 0.1" (65%) to 0.3" (35%) NONE Arapahoe 200 PM TO 1000 PM Trace (90%) to 0.1" (65%) to 0.3" (35%) NONE Broomfield 200 PM TO 1000 PM Trace (90%) to 0.1" (65%) to 0.3" (35%) NONE Denver 200 PM TO 1000 PM Trace (90%) to 0.1" (65%) to 0.3" (35%) NONE Boulder 100 PM TO 1000 PM Trace (95%) to 0.1" (70%) to 0.3" (40%) NONE Douglas 100 PM TO 1000 PM Trace (95%) to 0.1" (70%) to 0.3" (40%) NONE Jefferson 100 PM TO 1000 PM Trace (95%) to 0.1" (70%) to 0.3" (40%) NONE Foothills above 6500ft       Boulder 1200 PM TO 1000 PM Trace (95%) to 0.1" (75%) to 0.3" (50%) NONE Douglas 1200 PM TO 1000 PM Trace (95%) to 0.1" (75%) to 0.3" (50%) NONE Jefferson 1200 PM TO 1000 PM Trace (95%) to 0.1" (75%) to 0.3" (50%) 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]