Time: 933 PM Sat May 27, 2023 Forecaster: Brad Simmons ------------------------- Internal Message Status Flash Flood Prediction Program ------------------------- MESSAGE 1'S HAVE BEEN ALLOWED TO EXPIRE AT 9:30PM/ADDITIONAL RAIN SHOWERS CONTINUE POSSIBLE Message 1’s have been allowed to expire at 9:30pm as the threat of heavy rainfall has ended for the day. The surface wind convergence has washed out and storms are pushing eastward. Now that we are after sunset temperatures are cooling and no additional strong thunderstorm activity is expected this evening. Isolated rain showers and possibly a weak thunderstorm cannot be ruled out until around midnight. Best chances for additional shower activity will be over southern and eastern areas of the District as drier air makes pushes in from the west. A slight decrease in thunderstorm activity is expected on Sunday but the storms that form in the afternoon will still be capable of becoming strong to severe and will have the potential to produce brief heavy rainfall and large hail. STORM RAINFALL POTENTIAL AND DURATION: Rain showers will produce a trace to 0.1” of rain. An isolated weak thunderstorm will have the potential to produce 0.1-0.3” in 10-30 minutes. COUNTY MESSAGE VALID TIMES PRIME TIME County-specific Quantitative Precipitation Outlook PRECIPITATION TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams Current TO 1159 PM SAT Trace (60%) to 0.1" (30%) to 0.3" (10%) NONE Arapahoe Current TO 1159 PM SAT Trace (60%) to 0.1" (30%) to 0.3" (10%) NONE Boulder Current TO 1159 PM SAT Trace (40%) to 0.1" (20%) to 0.3" (5%) NONE Broomfield Current TO 1159 PM SAT Trace (40%) to 0.1" (20%) to 0.3" (5%) NONE Denver Current TO 1159 PM SAT Trace (60%) to 0.1" (30%) to 0.3" (10%) NONE Douglas Current TO 1159 PM SAT Trace (60%) to 0.1" (30%) to 0.3" (10%) NONE Jefferson Current TO 1159 PM SAT Trace (40%) to 0.1" (20%) to 0.3" (5%) NONE Foothills above 6500ft       Boulder Current TO 1159 PM SAT Trace (40%) to 0.1" (20%) to 0.3" (5%) NONE Douglas Current TO 1159 PM SAT Trace (40%) to 0.1" (20%) to 0.3" (5%) NONE Jefferson Current TO 1159 PM SAT Trace (40%) to 0.1" (20%) to 0.3" (5%) 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]