Time: 123 PM Sat July 8, 2023 Forecaster: Laura Smith ------------------------- Internal Message Status Flash Flood Prediction Program ------------------------- MESSAGE 1’S HAVE BEEN ISSUED FOR THE ENTIRE DISTRICT Message 1’s have been issued for the entire District effective until 800PM this evening. Favorable conditions exist across the district for widespread thunderstorm activity today, with dew points in the mid to upper 50s and broad upper level support. A few isolated showers have already initiated across the foothills and are starting to move east onto the plains. Scattered to widespread showers and thunderstorms are likely afternoon and into the late evening. The best chance for storms will be from now through 800PM, with a slight chance Messages will need to be extended if strong storms continue later than expected. Storm motions will be relatively brisk from west to east between 25-35 mph, which should help limit point rainfall amounts, though a slow-moving storm could result in heavy rains with runoff. Additional storms may develop along a gusty outflow or surface boundaries. These outflow or boundary storms will have the highest potential for heavy rainfall. STORM RAINFALL POTENTIAL AND DURATION: Moderate to strong thunderstorms will have the potential to produce rainfall rates of 0.5-1.5” in 10-30 minutes. WORST CASE SCENARIO: A large thunderstorm or briefly anchored strong thunderstorm may result in up to 2.5" of rain in 45-60 minutes. COUNTY MESSAGE VALID TIMES PRIME TIME Lakewood 1 Current TO 800 PM 200 PM TO 600 PM Wheat Ridge 1 Current TO 800 PM 200 PM TO 600 PM Arvada 1 Current TO 800 PM 200 PM TO 600 PM the City of Aurora 1 Current TO 800 PM 200 PM TO 600 PM Arapahoe County 1 Current TO 800 PM 200 PM TO 600 PM DIA 1 Current TO 800 PM 200 PM TO 600 PM Denver County 1 Current TO 800 PM 200 PM TO 600 PM Adams County 1 Current TO 800 PM 200 PM TO 600 PM Douglas County 1 Current TO 800 PM 200 PM TO 600 PM Broomfield County 1 Current TO 800 PM 200 PM TO 600 PM Jefferson County 1 Current TO 800 PM 200 PM TO 600 PM Boulder County 1 Current TO 800 PM 200 PM TO 600 PM MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS. MHFD Flood Prediction Center: 303-458-0789    F2P2 Website [http://udfcd.org/Flash+Flood+Prediction+Program]