Travel & RV Weather Forecast Thursday 1 September (and Labor Day Weekend outlook)

Excessive heat intensifies across southern and central CA and remains in place through the Labor Day weekend.
Localized flash flood possible today across parts of southwest Texas.
Tropical Depression Five formed over the central Atlantic last night – it will likely become Tropical Storm Danielle later today; no threat to the U.S. or Labor Day weekend travel plans.

Labor Day weekend outlook

Hot and dry for much of the West, Rockies, and Northern Plains — elevated fire danger.
Some monsoon rains reappear in Arizona over the weekend
Cooler and wetter than normal across Texas and the Southeast
Heaviest rains this weekend along the Texas and Louisiana coasts.
Dry, cool start to the weekend over the Midwest and Northeast, but rain and warmer temperatures move in by Monday, especially to the Midwest.
The Atlantic will have one, possibly two, named tropical storms over the weekend — but no threat to the U.S. or holiday travel plans.

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Pacific:

— Southern and much of interior Central CA; southern NV: Excessive Heat Warnings and Watches continuing through the Labor Day weekend and into early next week. High temperatures will range from 100-110 deg F in the San Joaquin Valley to 105-115 deg F in the Mojave and southern Deserts and 115-123 deg F in Death Valley. Excessive Heat Warnings come into effect throughout the Sacramento Valley starting Saturday. I-5, I-8, I-10, I-15, I-40, CA-58, CA-99 among the highways impacted.

Mountain:

— Portions of south-central AZ: Excessive Heat Warning Sunday and Monday. High temperatures 106-110 deg F. I-10, I-17 impacted.

Central:

— Portions of southwest TX: Flash Flood Watches continue through this evening for excessive rainfall. Locally 1-2 inches of rainfall are possible. Flooding threat greatest in the Big Bend region, including Big Bend National Park. I-10, I-20 potentially impacted.

— Northern WI; southeast MN; northwest IA; southeast NE; north-central KS: Isolated strong to severe thunderstorms possible Friday afternoon and evening. Strong wind gusts and hail are the primary threats. I-29, I-35, I-43, I-70, I-80, I-90, I-94 potentially impacted.

Eastern:

— MI Upper Peninsula: Isolated strong to severe thunderstorms possible Friday afternoon and evening. Strong wind gusts and hail are the primary threats.

Severe Weather and Tropical Watches and Warnings

— See https://rvweather.com/warnings-watches-and-advisories/#NHC_Hurricane_Advisory for the latest Tropical system WARNINGS and information.

— See https://rvweather.com/warnings-watches-and-advisories/#SPC_Tornado_Watch for the latest Tornado and Severe Thunderstorm WATCHES

— See https://rvweather.com/warnings-watches-and-advisories/#NWS_Tornado_Warning for the latest Tornado, Severe Thunderstorm, and Flash Flood WARNINGS.

Flash Flood threat Thursday and Thursday night 1 September
Heat Index Thursday afternoon 1 September
Departures from average temperatures over Labor Day weekend.
Rainfall, relative to normal, over Labor Day weekend. Red = dry; brown = drier than normal; green = wetter than normal; blue = very wet