Flash Flood Prediction Program

Time: 354 PM Wed June 12, 2024 Forecaster: Laura Smith ------------------------- Heavy Precipitation Outlook Flash Flood Prediction Program ------------------------- Isolated showers and thunderstorms have developed along the foothills Showers and thunderstorms have developed along portions of the foothills and are moving into the District. Afternoon temperatures have reached the mid 90s, dew points in the mid 30s. Upper level support remains weak, so organized convection is not expected. These relatively dry conditions will favor isolated storms capable of producing light rainfall and gusty winds. Storm motions will be from west to east around 20 mph. STORM RAINFALL POTENTIAL AND DURATION: Typical storms will produce a trace to 0.10” in 10-30 minutes. WORST CASE SCENARIO: A slow moving strong thunderstorm may be capable of producing up to 0.50” in 45-60 minutes. A LOOK AHEAD: Thursday will be similar as sweltering conditions persist. Highs will once again reach the mid 90s under sunny skies, followed by slight chances for isolated afternoon to evening showers and thunderstorms. The heat wave begins to recede Friday with the arrival of a cold front. Highs will reach the mid to upper 80s with chances for scattered to widespread showers and thunderstorms developing by the afternoon. A few storms may become severe, producing gusty outflows exceeding 58 mph and/or hail greater than 1 inch in diameter. The active pattern continues Saturday as highs reach the upper 80s to low 90s with slight chances for isolated afternoon and evening showers and thunderstorms. LOCATION PRIME TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams 330 PM TO 700 PM Trace (50%) to 0.05" (30%) to 0.1" (10%) NONE Arapahoe 330 PM TO 700 PM Trace (50%) to 0.05" (30%) to 0.1" (10%) NONE Boulder 330 PM TO 700 PM Trace (50%) to 0.05" (30%) to 0.1" (10%) NONE Broomfield 330 PM TO 700 PM Trace (50%) to 0.05" (30%) to 0.1" (10%) NONE Denver 330 PM TO 700 PM Trace (50%) to 0.05" (30%) to 0.1" (10%) NONE Douglas 330 PM TO 700 PM Trace (50%) to 0.05" (30%) to 0.1" (10%) NONE Jefferson 330 PM TO 700 PM Trace (50%) to 0.05" (30%) to 0.1" (10%) NONE Foothills above 6500ft       Boulder 330 PM TO 700 PM Trace (50%) to 0.05" (30%) to 0.1" (10%) NONE Douglas 330 PM TO 700 PM Trace (50%) to 0.05" (30%) to 0.1" (10%) NONE Jefferson 330 PM TO 700 PM Trace (50%) to 0.05" (30%) to 0.1" (10%) 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]