Travel & RV Weather Forecast Sunday 4 September

Excessive heat continues through Wednesday across much of California.
Flash flooding possible tonight night and Monday over parts of Kentucky and Tennessee. Heavy rains spread into Pennsylvania, New York and southern New England on Labor Day.
Hurricane Danielle and Tropical Storm Earl pose no threat to the U.S.

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Pacific:

— Most of CA except the immediate coast and mountains; southern NV: Excessive Heat Warnings and Watches continue through Wednesday. High temperatures will range from 105-115 deg F in many locations. I-5, I-8, I-10, I-15, I-40, I-80, CA-58, CA-99 among the highways impacted.

— Southeast CA and far-south NV, mostly bounded between I-15 and I-40: A marginal risk of severe thunderstorms this afternoon and evening. Damaging wind gusts possible. I-15, I-40 potentially impacted.

Mountain:

— Northwest AZ and south-central UT, Grand Canyon below 4000 feet and Glen Canyon below 5000 feet: Excessive Heat Warnings through Wednesday. Temperatures may reach 105 deg F in Glen Canyon and up to 115 deg F in Phantom Ranch, Grand Canyon.

— West-central AZ: A marginal risk of severe thunderstorms this afternoon and evening. Damaging wind gusts possible. I-40 potentially impacted.

— Portions of south-central AZ: Excessive Heat Warning through Wednesday. High temperatures 105-110 deg F. I-10, I-17 impacted.

— Northwest WY: Strong winds this afternoon with gusts 30-40 mph. Winds highest over exposed high elevations.

Central:

— South-central MO: Dense Fog Advisory this morning. I-44 impacted.

Eastern:

— Southeast IN; southwest OH; central and eastern KY; central and eastern TN: Flash Flood Watch through Monday evening for excessive rainfall. Rainfall rates could exceed 2 inches / hour. If you are camping near any small streams, creeks or low-lying areas, pay close attention to the forecast, any flood warnings, and directions from your local emergency management officials. Major highways potentially impacted include I-24, I-40, I-64, I-65, I-71, I-75.

— Heavy rains spread into central and eastern PA, southern NY and southern New England late tonight and continuing through Labor Day. Up to 1-2 inches of rain possible in some locations, creating a possibility for localized flash flooding. If you are camping near any small streams, creeks or low-lying areas, pay close attention to the forecast, any flood warnings, and directions from your local emergency management officials.