Flash Flood Prediction Program

Time: 933 AM Thu June 9, 2022 Forecaster: Laura Smith ------------------------- Heavy Precipitation Outlook Flash Flood Prediction Program ------------------------- HOT SUMMERTIME CONDITIONS WITH ISOLATED AFTERNOON THUNDERSTORMS - A strong high-pressure ridge is building over the intermountain west, creating hot summertime conditions under partly cloudy skies. Westerly flow aloft will transport warm air into the District today allowing temperatures to climb to around 90 degrees across the plains, around 80 degrees along the Front Range foothills. - There is a slight chance for isolated thunderstorms from early afternoon to sunset. Dewpoints will be around 20 degrees today, limiting storm potential. Any showers that manage to roll off the foothills this afternoon will be weak, producing minimal rainfall. Most areas within the District will be dry today. - Tonight, cloud cover will decrease with overnight lows dropping into the 50's over the plains with some 40's in the Front Range foothills. Dry conditions will persist overnight and through tomorrow. STORM RAINFALL POTENTIAL AND DURATION: Rain showers or weak thunderstorms will produce a trace to 0.2" of rain in 60 minutes or less. WORST CASE SCENARIO: A moderate to briefly strong thunderstorm is able to develop with the potential to produce rainfall rates of 0.1-0.4" in 30-60 minutes. A LOOK AHEAD: The warming trend continues Friday as high temperatures reach the low to mid 90's with clear skies. This weekend will be hot, dry, and sunny, with temperatures soaring into the mid to upper 90's. The dome of high-pressure will remain anchored to the intermountain west through Monday, with high temperatures reaching the upper 90's under clear skies. LOCATION PRIME TIME 60-Minute Rainfall and % Probability Message Potential Plains       Adams 300 PM TO 800 PM Trace (40%) to 0.1" (20%) to 0.2" (10%) NONE Arapahoe 300 PM TO 800 PM Trace (40%) to 0.1" (20%) to 0.2" (10%) NONE Boulder 300 PM TO 800 PM Trace (50%) to 0.1" (25%) to 0.2" (10%) NONE Broomfield 300 PM TO 800 PM Trace (40%) to 0.1" (20%) to 0.2" (10%) NONE Denver 300 PM TO 800 PM Trace (40%) to 0.1" (20%) to 0.2" (10%) NONE Douglas 300 PM TO 800 PM Trace (50%) to 0.1" (25%) to 0.2" (10%) NONE Jefferson 300 PM TO 800 PM Trace (50%) to 0.1" (25%) to 0.2" (10%) NONE Foothills above 6500ft       Boulder 100 PM TO 800 PM Trace (60%) to 0.1" (30%) to 0.2" (15%) NONE Douglas 100 PM TO 800 PM Trace (60%) to 0.1" (30%) to 0.2" (15%) NONE Jefferson 100 PM TO 800 PM Trace (60%) to 0.1" (30%) to 0.2" (15%) 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]