Flash Flood Prediction Program

Time: 710 PM Mon June 28, 2021 Forecaster: Justin Brooks ------------------------- Internal Message Status Flash Flood Prediction Program ------------------------- MESSAGE 1'S WILL BE ALLOWED TO EXPIRE AT 8:00 PM FOR PORTIONS OF THE DISTRICT - Message 1's that have been issued for Adams, Arapahoe, Denver, Douglas and Jefferson Counties will be allowed to expire at 8pm this evening as the threat for heavy rainfall has come to an end. - Most rain shower activity has cleared out of the District at this time. Skies will continue to gradually clear out through the overnight for the plains, with a few lingering scattered light rain showers still possible towards the foothills. Conditions will generally be dry, although a few light rain showers could persist through midnight, favoring areas along the foothills and west of I-25. - Overnight lows will drop into the 50's with mild conditions through the morning. A shift in the overall pattern tomorrow with a chance for rain showers/isolated thunderstorms in the afternoon which will move in from the south to north. Tomorrow will also start a warming trend over the region where we could see temperatures hit 80 degrees for the first time in several days. STORM RAINFALL POTENTIAL AND DURATION: Sprinkles to light rain will produce a trace to 0.1" in 10-30 minutes. WORST CASE SCENARIO: Light to moderate rain showers have the potential to produce 0.1-0.3" in 45-60 minutes. COUNTY MESSAGE VALID TIMES PRIME TIME Jefferson County 1 Current TO 800 PM Current TO 800 PM Douglas County 1 Current TO 800 PM Current TO 800 PM Adams County 1 Current TO 800 PM Current TO 800 PM Denver County 1 Current TO 800 PM Current TO 800 PM DIA 1 Current TO 800 PM Current TO 800 PM Arapahoe County 1 Current TO 800 PM Current TO 800 PM the City of Aurora 1 Current TO 800 PM Current TO 800 PM Arvada 1 Current TO 800 PM Current TO 800 PM Wheat Ridge 1 Current TO 800 PM Current TO 800 PM Lakewood 1 Current TO 800 PM Current TO 800 PM County-specific Quantitative Precipitation Outlook PRECIPITATION TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams Current TO 1159 PM MON Trace (10%) to 0.1" (5%) to 0.3" (0%) NONE Arapahoe Current TO 1159 PM MON Trace (10%) to 0.1" (5%) to 0.3" (0%) NONE Boulder Current TO 1159 PM MON Trace (10%) to 0.1" (5%) to 0.3" (0%) NONE Broomfield Current TO 1159 PM MON Trace (10%) to 0.1" (5%) to 0.3" (0%) NONE Denver Current TO 1159 PM MON Trace (10%) to 0.1" (5%) to 0.3" (0%) NONE Douglas Current TO 1159 PM MON Trace (10%) to 0.1" (5%) to 0.3" (0%) NONE Jefferson Current TO 1159 PM MON Trace (10%) to 0.1" (5%) to 0.3" (0%) NONE Foothills above 6500ft       Boulder Current TO 1159 PM MON Trace (20%) to 0.1" (10%) to 0.3" (5%) NONE Douglas Current TO 1159 PM MON Trace (20%) to 0.1" (10%) to 0.3" (5%) NONE Jefferson Current TO 1159 PM MON Trace (20%) to 0.1" (10%) 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]