Flash Flood Guidance
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949
AWUS01 KWNH 300059
FFGMPD
COZ000-NMZ000-300557-

Mesoscale Precipitation Discussion 0895
NWS Weather Prediction Center College Park MD
858 PM EDT Wed Jul 29 2026

Areas affected...much of Colorado

Concerning...Heavy rainfall...Flash flooding likely

Valid 300057Z - 300557Z

Summary...Flash flood potential will continue for another 3-6
hours across several areas of Colorado.

Discussion...Scattered thunderstorms continue in progress across
several areas of Colorado currently.  Most recent radar/satellite
indicate that the greatest concentration of storms exists across
western and south-central portions of the state -- primarily where
the low-level airmass has been relatively undisturbed from prior
convection.  Storms remain capable of heavy rainfall and 1-1.25
inch/hr rain rates, which continues to be supported by areas of
1-1.5 inch PW and 500-1500 J/kg MLCAPE -- both higher with eastern
extent.

Models and observations both suggest that storms should continue
for several more hours across the state.  Eventually, a transition
to slow-moving, yet forward-propagating clusters will occur as
convection gets east of the Front Range toward better
instability/moisture across the Plains.  These trends should
support longevity of thunderstorms along with local rain rates to
2 inches/hr at times, with storms reaching the CO/KS border region
after 04Z/10p mountain time.  CAMs hint at lingering convection in
western Colorado during that time as well -- and that activity
might be supported both by abundant moisture and an approaching
mid-level shortwave trough out of Utah through the early overnight
period.  Flash flood potential will persist during that time as
well.

Cook

...Please see www.wpc.ncep.noaa.gov for graphic product...

ATTN...WFO...ABQ...BOU...GJT...GLD...PUB...

ATTN...RFC...FWR...KRF...STR...TUA...NWC...

LAT...LON   40920558 40790255 39350210 37180217 37010473
            36970725 37730816 39140822 40650760