Three things to know about weather for travelers Thursday 29 June

Dangerous heat will continue expanding east through the Lower Mississippi Valley and Mid-South and into the Southeast through Friday. The heat expands into interior California and the Southwest this weekend.
Focus of the severe thunderstorms moves eastward the next couple of days to the Ohio and Tennessee Valleys.
Wildfire smoke eases after today.

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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:

— East-central CA including Mono County and eastern slopes of the southern Sierra Nevada: Flood Watches Friday 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 Friday through Sunday. High temperatures 100-110 deg F. I-5, I-80, CA-99 impacted.

— Much of southeast CA; southern NV: Excessive Heat Watches Saturday through Monday. High temperatures well over 100 deg below 5000 feet. I-8, I-10, I-15, I-40, US-396, CA-58 potentially impacted.

Mountain:

— East-central and southeast WY: Flood Watch this afternoon through Friday afternoon for additional heavy rainfall from multiple passing thunderstorms. I-25 potentially impacted.

— Southeast WY; eastern CO: A few strong to severe thunderstorms possible today. Marginally severe winds, large to very large hail, and an isolated tornado all possible. I-25, I-70, I-76, I-80 potentially impacted.

— Eastern CO: Isolated strong to severe thunderstorms possible Friday. Wind and hail are the primary threats. I-70, I-76 potentially impacted.

— West-central and southwest CO: Red Flag (fire danger) Warnings late this morning through this evening. Gusts to 35 mph. I-70 impacted.

— East-central and northeast AZ; northwest NM: Strong winds this afternoon and evening. Gusts to 35 mph. I-40 impacted.

— Western, southwest and south-central AZ: Excessive Heat Watch Saturday through Tuesday. Afternoon temperatures 109 – 117 deg F. I-8, I-10, I-19, I-40 potentially impacted.

Central:

— Central, east-central and northeast MN: Dense Fog Advisories this morning. I-35, I-94 impacted.

— Western NE: Flood Watch this afternoon through Friday afternoon for additional heavy rainfall from multiple passing thunderstorms. I-80 potentially impacted.

— South-central and southeast NE; north-central and northeast KS: Severe Thunderstorm Watch through mid-morning. Tennis Ball sized hail and wind gusts to 75 mph possible. I-80 potentially impacted.

— Portions of central and east-central IL: Severe Thunderstorm Watch through mid-morning. Two-inch sized hail and wind gusts to 65 mph possible. I-39, I-55, I-57, I-70, I-74, I-80 potentially impacted.

— Southern and central NE; western and northern KS; central and southern IA; northern MO; most of IL; western KY; north-central TN: Expect severe thunderstorms today and this evening. Damaging winds and hail possible across the entire region. Greatest risk for tornadoes is over most of IL and northwest KY; an isolated tornado or two also possible over NE. Greatest risk of large hail extends from southeast IA and northeast MO and most of IL except far southern portion of state. I-24, I-29, I-35, I-55, I-57, I-64, I-70, I-72, I-74, I-80, I-88 potentially impacted.

— Southern NE; western and northern KS; southern IA; northern MO: Isolated strong to severe thunderstorms possible Friday. I-29, I-35, I-70, I-80 potentially impacted.

— Central and southeast IL: Severe thunderstorms with damaging winds possible Friday afternoon and evening. I-55, I-57, I-70, I-72, I-74 potentially impacted.

— Central and east-central MO; central and southern IL; western KY: Severe thunderstorms possible Saturday and Saturday evening. I-44, I-55, I-57, I-64, I-65, I-70, I-72, I-74 potentially impacted.

— Eastern OK; northeast TX; northern, central and eastern LA; most of AR; southeast MO; far-west KY; western and central TN; MS; central, east-central and northeast AL: Excessive Heat Warnings through Friday. Heat index values may reach 115 deg F. I-10, I-12, I-20, I-24, I-30, I-40, I-44, I-49, I-55, I-59, I-65 impacted.

Eastern:

— Coastal ME and southern NH: Dense Fog Advisories this morning. I-93, I-95, US-1 impacted.

— MI, OH, PA, NY, NJ, MD, DC, northern VA: Wildfire smoke continues to impact air quality today. Smoke decreases in concentration beginning on Friday.

— Western, central and southern IN; central KY: Severe thunderstorms likely to develop today. Damaging winds, large hail and a tornado or two are all possible. Greatest risk will be over southwest IN. I-64, I-65, I-69, I-70, I-74, I-80, I-90, I-94, IN Toll Road potentially impacted.

— Central and southern IN; central and eastern KY; eastern TN; far-northern GA; western NC; southwest VA; southwest WV; southwest OH: Thunderstorms with damaging winds possible on Friday. I-24, I-26, I-40, I-64, I-65, I-69, I-70, I-71, I-74, I-75, I-77, I-81 potentially impacted.

— Central and southern IN; central and southern OH; central and eastern KY; central and eastern TN; northern GA; western NC; central and southwest VA; most of WV: Severe thunderstorms possible Saturday. 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.

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

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