Time: 947 AM Fri July 14, 2023 Forecaster: Laura Smith ------------------------- Heavy Precipitation Outlook Flash Flood Prediction Program ------------------------- HOT SUMMERTIME CONDITIONS WITH ISOLATED AFTERNOON THUNDERSTORMS Last night’s cold front brings cooler temperatures and increased moisture today and tomorrow followed by a heat wave early next week. Today will be mostly sunny with afternoon temperatures in the mid to upper 80s, dew points in the low 50s, and a chance for isolated showers and thunderstorms. The best time for storms today will be during the late afternoon hours with storms moving from the northwest to southeast between 25 and 35 MPH, which will help limit point rainfall amounts. However, a gust front from a stronger storm could potentially cause slow storm movement, leading to isolated heavy rainfall. Thunderstorm activity is expected to subside across the Front Range Urban Corridor by mid-evening. Skies will clear overnight with lows falling into the upper 50s to low 60s. STORM RAINFALL POTENTIAL AND DURATION: Typical thunderstorms will produce moderate rainfall of up to 0.25” in 10-30 minutes. Strong thunderstorms have the potential to produce heavy rainfall up to 0.75” in 10-30 minutes. WORST CASE SCENARIO: Training thunderstorms have the potential to produce 0.75” to 1.50” in 60 minutes. A LOOK AHEAD: Saturday will be similar, with highs in the low to mid 80s and afternoon thunderstorm activity. Warmer and drier weather will build into the region beginning Sunday. Afternoon temperatures will climb into the upper 80s to low 90s under clear and sunny skies. Heat will intensify Monday with temperatures about 10 degrees above normal. Very dry conditions will be more widespread as high temperatures are expected to reach or exceed 100°F on the plains. LOCATION PRIME TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams 400 PM TO 1000 PM Trace (60%) to 0.25" (30%) to 0.75" (10%) LOW Arapahoe 400 PM TO 1000 PM Trace (60%) to 0.25" (30%) to 0.75" (10%) LOW Boulder 400 PM TO 1000 PM Trace (60%) to 0.25" (30%) to 0.75" (10%) LOW Broomfield 400 PM TO 1000 PM Trace (60%) to 0.25" (30%) to 0.75" (10%) LOW Denver 400 PM TO 1000 PM Trace (60%) to 0.25" (30%) to 0.75" (10%) LOW Douglas 400 PM TO 1000 PM Trace (60%) to 0.25" (30%) to 0.75" (10%) LOW Jefferson 400 PM TO 1000 PM Trace (60%) to 0.25" (30%) to 0.75" (10%) LOW Foothills above 6500ft       Boulder 400 PM TO 1000 PM Trace (60%) to 0.25" (30%) to 0.75" (10%) LOW Douglas 400 PM TO 1000 PM Trace (60%) to 0.25" (30%) to 0.75" (10%) LOW Jefferson 400 PM TO 1000 PM Trace (60%) to 0.25" (30%) to 0.75" (10%) 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]