Hazardous Heat in the Western U.S.; Heavy Rain and Flooding Potential in the Southern Rockies

Widespread high temperatures in the 90s with heat indices exceeding 100 degrees will persist across the western U.S. this weekend into next week. Some daily high temperature records are forecast to be tied or broken. Monsoon conditions continue to linger across the Southern Rockies posing a heavy rainfall threat which may lead to additional flash flooding concerns. Read More >

Rip Current Risk Definitions
Low Risk	Surf zone conditions are not expected to support the development of life threatening rip currents. However, life threatening rip currents often occur in the vicinity of groins, jetties, reefs, and piers.
Moderate Risk	Surf zone conditions are favorable for the development of life threatening rip currents.
High Risk	Surf zone conditions will likely support the development of life threatening rip currents.

Lightning Risk Definitions
Low Risk	Thunderstorms are only expected to be isolated or widely scattered in coverage (20 Percent Chance). Atmospheric conditions do not support frequent cloud-to-ground lightning strikes.
Moderate Risk	Thunderstorms are forecast to be scattered in coverage (30-50 Percent Chance). Atmospheric conditions support frequent cloud-to-ground lightning strikes.
High Risk	Thunderstorms are forecast to be numerous or widespread in coverage (60-100 Percent Chance). Atmospheric conditions support continuous and intense cloud-to-ground lightning strikes.

Waterspout Risk Definitions
None	No threat of waterspouts
Low Risk	Showers or thunderstorms are possible, but conditions are not particularly favorable for waterspout development.
Moderate Risk	Showers or thunderstorms are possible, and conditions could support the development of waterspouts. Mariners and beach-goers should keep an eye on the weather.
High Risk	Showers or thunderstorms are possible, and conditions are supportive of waterspout development. Mariners and beach-goers should keep a close eye on the weather. Listen for possible statements or warnings.