Time: 855 AM Mon September 4, 2023
Forecaster: Justin Brooks
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Heavy Precipitation Outlook
Flash Flood Prediction Program
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ANOTHER WARM DAY WITH A VERY SLIGHT CHANCE OF AFTERNOON/EVE SHOWERS &
ISOLATED THUNDERSTORMS
As yesterday’s disturbance moves off, much drier conditions will
be settling in the area for the several days. Today’s high
temperatures will be in the upper 80s and lower 90s this afternoon.
Winds will be gusty this afternoon, with gusts up to 30mph. A very
slight chance of showers/isolated thunderstorms this afternoon,
favoring areas north of I-70 at this time. Any shower activity will
generally be hit or miss with most areas across the District likely
remaining throughout the day and evening. The best chance for any
storm activity will be from 1-7pm. Skies will clear through the
overnight with lows dropping into the 50s on the plains with upper 40s
to low 50s along the foothills.
STORM RAINFALL POTENTIAL AND DURATION: Typical showers and weak
thunderstorms will produce rainfall of a trace to 0.20” total in
10-30 minutes. Moderate to strong showers and thunderstorms Will
produce rainfall of 0.20” to 0.40” total in 10-30 minutes.
WORST CASE SCENARIO: A strong, nearly stationary, or training of
showers/thunderstorms has the potential to produce 0.40” to 0.60”
in under 60 minutes.
A LOOK AHEAD: Conditions start to dry out Tuesday behind a cold front
that will drop high temperatures back into the upper 70s to low 80s
under partly cloudy skies. Warmer Wednesday with high temperatures in
the mid to upper 80s with mostly sunny skies.
LOCATION
PRIME TIME
30-Minute Rainfall
and % Probability Message
Potential
Plains
Adams
100 PM TO 700 PM
Trace (20%) to 0.2" (10%) to 0.4" (5%)
NONE
Arapahoe
100 PM TO 700 PM
Trace (20%) to 0.2" (10%) to 0.4" (5%)
NONE
Boulder
100 PM TO 700 PM
Trace (20%) to 0.2" (10%) to 0.4" (5%)
NONE
Broomfield
100 PM TO 700 PM
Trace (20%) to 0.2" (10%) to 0.4" (5%)
NONE
Denver
100 PM TO 700 PM
Trace (15%) to 0.2" (10%) to 0.4" (5%)
NONE
Douglas
100 PM TO 700 PM
Trace (10%) to 0.2" (5%)
NONE
Jefferson
100 PM TO 700 PM
Trace (15%) to 0.2" (10%) to 0.4" (5%)
NONE
Foothills above 6500ft
Boulder
100 PM TO 700 PM
Trace (20%) to 0.2" (10%) to 0.4" (5%)
NONE
Douglas
100 PM TO 700 PM
Trace (10%) to 0.2" (5%)
NONE
Jefferson
100 PM TO 700 PM
Trace (15%) to 0.2" (10%) to 0.4" (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]