Grand Countyarea
Jul 20, 2026, 4:12 PMeffective
Jul 20, 2026, 5:45 PMexpires
NWS Denversource
Warned area as issued by the National Weather Service
Full advisory
WHAT
Small stream flooding caused by excessive rainfall continues.
WHERE
Eastern Grand County in north central Colorado... West Central Boulder County in northeastern Colorado...
WHEN
Until 545 PM MDT.
IMPACTS
Minor flooding in low-lying and poor drainage areas. Rises in small streams and normally dry creeks.
ADDITIONAL DETAILS
- At 408 PM MDT, Doppler radar and automated rain gauges indicated heavy rain due to thunderstorms. This may cause small stream flooding. Between 1.5 and 2 inches of rain have fallen.- Some locations that will experience flooding include... Granby, Fraser, Winter Park, Grand Lake, Elkdale and Tabernash.