Flash Flood Prediction Program

Time: 904 AM Mon July 3, 2023 Forecaster: Laura Smith ------------------------- Heavy Precipitation Outlook Flash Flood Prediction Program ------------------------- HOT SUMMERTIME CONDITIONS WITH A SMALL CHANCE FOR ISOLATED AFTERNOON THUNDERSTORMS High pressure ridging over the Desert Southwest will support sunny and hot conditions today ahead of a cold front tomorrow. This morning will be clear and dry before afternoon temperatures climb into the low to mid 90s, dew points in the mid 40s. Isolated showers are possible along the foothills throughout the afternoon and evening. There is a very low chance an isolated shower rolls off the foothills later this afternoon, with chances diminishing by the evening. STORM RAINFALL POTENTIAL AND DURATION: Typical thunderstorms have the potential to produce a TR to 0.25” 10-30 minutes. WORST CASE SCENARIO: A stronger thunderstorm has the potential to produce 0.25” to 0.50” in 60 minutes. A LOOK AHEAD: Tomorrow will be an active day across the Front Range Urban Corridor as a strong cold front approaches from the north. High temperatures will reach the mid 80s with scattered to widespread showers and thunderstorms initiating during the early afternoon. Thunderstorms may become severe, producing gusty outflows exceeding 58 mph, and hail greater than 1.00 inch in diameter. Storms will persist into the evening and overnight hours as the cold front works its way across the High Plains. Showers will continue through Wednesday with cooler temperatures in the upper 60s to low 70s. LOCATION PRIME TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams 200 PM TO 800 PM 0.05" (90%) to 0.15" (60%) to 0.25" (30%) NONE Arapahoe 200 PM TO 800 PM 0.05" (90%) to 0.15" (60%) to 0.25" (30%) NONE Boulder 200 PM TO 800 PM 0.05" (90%) to 0.15" (60%) to 0.25" (30%) NONE Broomfield 200 PM TO 800 PM 0.05" (90%) to 0.15" (60%) to 0.25" (30%) NONE Denver 200 PM TO 800 PM 0.05" (90%) to 0.15" (60%) to 0.25" (30%) NONE Douglas 200 PM TO 800 PM 0.05" (90%) to 0.15" (60%) to 0.25" (30%) NONE Jefferson 200 PM TO 800 PM 0.05" (90%) to 0.15" (60%) to 0.25" (30%) NONE Foothills above 6500ft       Boulder 200 PM TO 800 PM 0.1" (90%) to 0.2" (60%) to 0.3" (30%) NONE Douglas 200 PM TO 800 PM 0.1" (90%) to 0.2" (60%) to 0.3" (30%) NONE Jefferson 200 PM TO 800 PM 0.1" (90%) to 0.2" (60%) to 0.3" (30%) 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]