Three things to know about weather for travelers Saturday 1 July

Oppressive heat and humidity will continue across the Southern U.S. Hot temperatures expected over the Southeast on Sunday and linger through July 4th. In the West, excessive heat is expected from California into the Desert Southwest
Severe thunderstorms today in the Ohio and Tennessee Valleys, moving to the Mid-Atlantic States on Sunday.
Locally strong winds over parts of the interior Pacific Northwest today and tonight.

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Starting Monday morning, 27 November, this site will be down for a major upgrade. RVWeather.com will return no later than Wednesday 29 November — sooner if possible. When the site returns, WILMA, our NEW(!) integrated weather impacts product, will be available. The Paywall will also be implemented. RV Weather will continue to provide free access to essential, RV-relevant National Weather Service Warnings and Advisories, current weather, and weather safety information. While the main site is off-line, I will post a simple forecast to my email list and to RVWeather on Facebook.

Happy Summer Solstice! Enjoy the longest day(light) of the year!

From the RV Weather Summer Office in Moose Wyoming:

These are the most significant weather impacts to RV travel over the next two to three days. I do not list every area of rain, showers, or breezy winds. (It would be exhausting for both of us!). Please check out the animations and graphics for a good depiction of the weather along your route.

Pacific:

— Central WA Kittitas Valley: Wind Advisory late this morning through late evening. Gusts to 50 mph. I-82, I-90, US-97 impacted.

— Much of central and western WA; north-central OR and northern OR east of the Cascades: Red Flag (fire danger) Warnings midday today through this evening. Wind gusts 30-40 mph. I-82, I-84, I-90, US-395 impacted.

— East-central CA including Mono County and eastern slopes of the southern Sierra Nevada: Flood Watches continue through Tuesday for snow melt. Flooding impacting rural roads and campgrounds is likely. US-395 potentially impacted.

— CA Sacramento and San Joaquin Valleys: Excessive Heat Warnings continue through Sunday. High temperatures 100-110 deg F. I-5, I-80, CA-99 impacted.

— Much of southeast CA; southern NV: Excessive Heat Warnings Saturday continue through Monday. High temperatures will range from 105 deg F in Owens Valley to 120-125 deg F in Death Valley. Hottest temperatures below 5000 feet. I-8, I-10, I-15, I-40, US-395, CA-58 potentially impacted.

Mountain:

— Southeast NM: Scattered thunderstorms today with localized severe wind gusts and some hail. US-180, US-285 potentially impacted.

— Western, southwest and portions of southern AZ: Excessive Heat Warning Saturday through Tuesday. Afternoon temperatures 108 – 116 deg F. I-8, I-10, I-40 impacted.

Central:

— Southwest TX: Scattered thunderstorms today with localized severe wind gusts and some hail. I-20 potentially impacted.

— Central and eastern MO; central and southern IL; western KY; central TN; northeast MS; northern AL: Severe thunderstorms possible today. Severe wind gusts, hail and a tornado or two all possible. The tornado threat should remain north of I-40. Greatest overall risk today will be over eastern MO and central and southern IL. I-22, I-24, I-40, I-44, I-55, I-57, I-64, I-65, I-69, I-70, I-72, I-74 potentially impacted.

— Southeast IL; western KY; northwest TN: Severe thunderstorms, accompanied by locally damaging wind and hail, are possible on Sunday. I-24, I-40, I-55, I-57, I-64, I-65, I-69, I-70, I-72, I-74 potentially impacted.

— Eastern AR; eastern LA; western TN; MS; western and north-central AL: Excessive Heat Warnings today. Heat index values may reach 115 deg F. I-10, I-12, I-20, I-22, I-40, I-55, I-59, I-65 impacted.

Eastern:

— Southern coastal ME: Dense Fog Advisories this morning. I-95, US-1 impacted.

— Central and southern IN; central and southern OH; KY; TN; northern GA; northern SC; western and central NC; most of VA west of I-95; most of WV: Severe thunderstorms possible today. While wind and hail are the primary threats, a few tornadoes are also possible over central and southern IN, most of KY and southwest OH. I-24, I-26, I-40, I-64, I-65, I-69, I-70, I-71, I-74, I-75, I-77, I-79, I-81, I-85 potentially impacted.

— Central and southern IN; KY; central and southern OH; WV; southern PA; MD; DC; northern and central VA; DE; southern NJ: A few severe thunderstorms with locally damaging winds and hail are expected on Sunday. I-24, I-64, I-65, I-66, I-68, I-69, I-70, I-71, I-74, I-75, I-76, I-77, I-79, I-81, I-83, I-85, I-95, I-99, PA and NJ Turnpikes, Garden State Parkway potentially impacted.

— Eastern states from MI to NY and southward to FL: Smoke is less intense today and mainly concentrated over eastern NY, and along the seaboard from NJ southward to GA. Smoke will also be noticeable in AL and MS. On Sunday, smoke clears out of the Midwest, Northeast and the Mid-Atlantic states. Some wildfire smoke persists on Sunday over the Southeast and Deep South.

Click here for the extended outlook (updates every Thursday and Sunday evening).

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