Time: 537 PM Sat July 25, 2020 Forecaster: Brad Simmons

Internal Message Status
Flash Flood Prediction Program

MESSAGE 1'S WILL CONTINUE VALID UNTIL 10PM, HEAVY RAINFALL THREAT DECREASING
-Message 1's will continue valid through 10:00 pm although the threat for heavy rainfall has decreased.
-The strongest storms so far today have remained to the S, SE and E of the District with more of a showery nature to storms over the District as a whole. A fairly widespread rain has been falling over the District since 2-3pm and is currently moving out from SW to NE. A lull in the rainfall will occur for 1-2 hours, then additional showers and possibly a weak to moderate thunderstorm will fill in again later this evening.
-Although the threat for thunderstorms is low it will only take a moderate thunderstorm to produce a brief period of heavy rainfall which may lead to excessive runoff. Strong thunderstorms are no longer anticipated. Best chances for showers and possibly weak to moderate thunderstorms will be until 10:00 pm. Additional rain showers will continue possible overnight into early on Sunday.
STORM RAINFALL POTENTIAL AND DURATION: Typical rain showers will produce a trace to 0.2" in 10-30 minutes. Weak to moderate thunderstorms will have the potential to produce 0.2-0.8" in 10-30 minutes. Supplemental QPF is available at https://qpf.udfcd.org

WORST CASE SCENARIO: A strong thunderstorm is able to develop with the potential to produce 0.5-1.5" of rain in 10-30 minutes.

County Message Valid Times Prime Time
Boulder County 1 Current TO 1000 PM Current TO 930 PM
Jefferson County 1 Current TO 1000 PM Current TO 930 PM
Broomfield County 1 Current TO 1000 PM Current TO 930 PM
Douglas County 1 Current TO 1000 PM Current TO 930 PM
Adams County 1 Current TO 1000 PM Current TO 930 PM
Denver County 1 Current TO 1000 PM Current TO 930 PM
DIA 1 Current TO 1000 PM Current TO 930 PM
Arapahoe County 1 Current TO 1000 PM Current TO 930 PM
the City of Aurora 1 Current TO 1000 PM Current TO 930 PM
Arvada 1 Current TO 1000 PM Current TO 930 PM
Wheat Ridge 1 Current TO 1000 PM Current TO 930 PM
Lakewood 1 Current TO 1000 PM Current TO 930 PM

County-specific Quantitative
Precipitation Outlook
Precipitation Time 30-Minute Rainfall
and % Probability
Message
Potential
Plains      
Adams Current TO 1000 PM SAT
Trace (100%) to 0.2" (60%) to 0.6" (10%) ISSUED
Arapahoe Current TO 1000 PM SAT
Trace (100%) to 0.2" (60%) to 0.6" (10%) ISSUED
Boulder Current TO 1000 PM SAT
Trace (100%) to 0.2" (60%) to 0.6" (10%) ISSUED
Broomfield Current TO 1000 PM SAT
Trace (100%) to 0.2" (60%) to 0.6" (10%) ISSUED
Denver Current TO 1000 PM SAT
Trace (100%) to 0.2" (60%) to 0.6" (10%) ISSUED
Douglas Current TO 1000 PM SAT
Trace (100%) to 0.2" (60%) to 0.6" (10%) ISSUED
Jefferson Current TO 1000 PM SAT
Trace (100%) to 0.2" (60%) to 0.6" (10%) ISSUED
Foothills above 6500ft      
Boulder Current TO 1000 PM SAT
Trace (100%) to 0.2" (60%) to 0.6" (10%) ISSUED
Douglas Current TO 1000 PM SAT
Trace (100%) to 0.2" (60%) to 0.6" (10%) ISSUED
Jefferson Current TO 1000 PM SAT
Trace (100%) to 0.2" (60%) to 0.6" (10%) ISSUED
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.