Flash Flood Prediction Program

Time: 1001 AM Sat May 21, 2022 Forecaster: Justin Brooks ------------------------- Heavy Precipitation Outlook Flash Flood Prediction Program ------------------------- ANOTHER COOLER THAN AVERAGE DAY WITH CONDITONS LIKELY DRYING OUT THROUGH THE REST OF THE DAY - After a powerful winter storm moved through the region yesterday and through the overnight temperatures today will remain well below average with highs in the low to mid 40's this afternoon. Skies have gradually started to clear this morning with some sunshine starting to peak through. Partly cloudy skies are expected to continue throughout the day. - A few scattered snow showers remain in the high country and could produce a few short lived light mix/snow showers along the foothills this afternoon, however minimal precipitation is expected in the District. Best chance for any precipitation activity will be from now until 5pm this afternoon with conditions drying out through the evening and into Sunday. - Overnight lows will dip into the upper 20's to low 30's on the plains with mid to upper 20's along the foothills. STORM RAINFALL POTENTIAL AND DURATION: Light to moderate mix/snow showers along the foothills or melted snow equivalent will produce precipitation rates of TR-0.1" in 10-30 minutes. WORST CASE SCENARIO: If a moderate rain/mix shower is able to persist off the foothills and into the District there would be the potential to produce 0.1-0.3" of rainfall in one hour. A LOOK AHEAD: Sunday starts to warm up as high temperatures are expected to reach the mid to upper 50's in the afternoon under mostly sunny skies. A slight chance for afternoon and evening rain showers with a very slight chance for an isolated thunderstorm, mainly along the foothills or Palmer Divide. Similar conditions in place For the beginning of next week with afternoon storm chances both Monday and Tuesday. LOCATION PRIME TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams Current TO 600 PM SAT Trace (20%) to 0.1" (10%) to 0.3" (5%) NONE Arapahoe Current TO 600 PM SAT Trace (20%) to 0.1" (10%) to 0.3" (5%) NONE Boulder Current TO 600 PM SAT Trace (20%) to 0.1" (10%) to 0.3" (5%) NONE Broomfield Current TO 600 PM SAT Trace (20%) to 0.1" (10%) to 0.3" (5%) NONE Denver Current TO 600 PM SAT Trace (20%) to 0.1" (10%) to 0.3" (5%) NONE Douglas Current TO 600 PM SAT Trace (20%) to 0.1" (10%) to 0.3" (5%) NONE Jefferson Current TO 600 PM SAT Trace (20%) to 0.1" (10%) to 0.3" (5%) NONE Foothills above 6500ft       Boulder Current TO 600 PM SAT Trace (40%) to 0.1" (20%) to 0.3" (5%) NONE Douglas Current TO 600 PM SAT Trace (30%) to 0.1" (10%) to 0.3" (5%) NONE Jefferson Current TO 600 PM SAT Trace (40%) to 0.1" (20%) to 0.3" (5%) 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]