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Planning to travel this week? Here’s what could impact your route.

• Southwest: Significant flash-flood threat today across southern Utah, western Colorado, much of Arizona and New Mexico, with rainfall rates of 1–2 inches per hour.
• Central Plains/Midwest: Flooding remains a major concern from southeastern Nebraska and Kansas through Iowa, Missouri and northern Illinois. Some areas have already received 2–4 inches, with additional heavy rain and localized flash flooding possible today into early Thursday.
• Southern Plains to Tennessee Valley: Heat continues today, with widespread 105–110°F heat indices. Advisories extend from Texas and Oklahoma through the lower Mississippi and Tennessee valleys.

Your route’s weather may vary from the general forecast — check your exact trip

This free daily forecast is separate from a paid RV Weather SureRoute subscription. SureRoute checks the weather along your specific route and travel timing.

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Significant travel weather for the next 2-3 days.

Weather Impacts Pacific:

— Central Nevada: Red Flag Warnings are in effect today and again Thursday. Winds of 20–25 mph with gusts to 30–35 mph and humidity of 10–15% will support rapid fire spread. US-6, US-50 and US-95 may be affected.

Weather Impacts Mountain:

— North-central Montana: Patchy fog this morning may reduce visibility below one-half mile, especially around the Southern Rocky Mountain Front and Gates of the Mountains. I-15, US-87, US-89 and US-287 may be affected.

— Southeastern Wyoming: A chance of scattered flash flooding Thursday, including along portions of I-25 and I-80.

— Central and northern Utah: Chance of severe thunderstorms today, including isolated severe wind gusts or hail. I-15, I-80 and I-84 are among the routes potentially affected.

— Southwest — southern Utah, western Colorado, Arizona and New Mexico: Flood Watches cover much of Arizona, southern Utah, southwestern Colorado and western/central/southern New Mexico., with a significant risk over southern and central Arizona, and also across south-central New Mexico. Rainfall rates of 1–2 inches per hour are possible in Arizona and New Mexico, with flash flooding of washes, slot canyons, burn scars and low-water crossings.

— Southwest Thursday: The flash-flood threat persists but shifts somewhat east, with the greatest risk concentrated across eastern Arizona, central/western New Mexico, western Colorado and far-southeastern Utah.

Weather Impacts Central:

— Northern Plains/Upper Midwest Thursday and Friday: A Slight Risk of excessive rainfall Thursday covers much of South Dakota, northwestern Nebraska and southwestern Minnesota, where 2–4 inches with locally higher totals are possible. On Friday, a separate Slight Risk shifts east into southern Minnesota, Wisconsin, northern Iowa and far northern Illinois.

— Southeastern Nebraska, Kansas, southwestern Iowa and northwestern Missouri: Flood Watches remain in effect after heavy overnight rain. Parts of northeastern Kansas and northwestern Missouri have received 2–4 inches, with additional thunderstorms capable of flash flooding.

— Eastern Nebraska, north-central/northwestern Kansas and western/central Iowa: A Marginal Risk of severe thunderstorms develops late Friday afternoon and evening, with strong downbursts possible.

— Southern Iowa into northern Missouri and northern Illinois: A Slight Risk of excessive rainfall continues today into early Thursday, with repeated thunderstorms capable of localized flash flooding. I-29, I-35, I-55, I-70, I-80 and I-90 are among the corridors affected.

— Southwestern Iowa: A Flood Warning continues today after 2–4 inches of rain; another inch or more is possible this morning, with numerous roads already closed. I-80 is among the primary affected routes.

— Northern Missouri: Flood Advisories and Warnings continue after 2–3.5 inches of rain. The Grand River near Pattonsburg is forecast to crest early Thursday, flooding farmland and secondary roads.

— Southern Plains through the lower Mississippi and Tennessee valleys: Heat indices will generally reach 105–110°F, with 108–111°F and locally higher values in far southern Texas. Advisories continue into Saturday in portions of Missouri, Illinois, Kentucky, Tennessee and Alabama.

Weather Impacts East:

— Northern Indiana and central/northern Ohio: A Slight Risk of excessive rainfall continues today into early Thursday. Repeated thunderstorms may produce localized 1–3 inch totals and flash flooding of low-lying roads.

— Southern Indiana, Kentucky and the Ohio Valley: Humid heat continues, with heat indices generally in the upper 90s to around 105°F in the hottest areas; parts of Kentucky remain hot Thursday.

— West-central Ohio: A Flood Advisory continues this morning after 1–2 inches of rain, with another 0.5–1 inch possible. Minor flooding is affecting low-lying and poor-drainage areas near I-75.

— Ohio, West Virginia and far southwestern Pennsylvania: A Marginal Risk of severe thunderstorms today includes isolated damaging wet downbursts. I-70, I-71, I-75, I-77 and I-79 may be affected.

— North-central Florida: Minor flooding continues along the Withlacoochee River near Dunnellon. Docks, boat ramps and low areas near US-41 remain affected.

Tropical Weather Outlook for the next 7 days:

— Eastern Pacific: The remnants of Fifteen-E are about 1,155 miles west-southwest of Baja California with 30 mph winds. Further weakening is expected today, with no threat to the continental United States.

Extended Hazard Outlook

Outlook Friday September 18th through Tuesday September 22nd:

— Friday, September 18 through Saturday, September 19: From southeastern North Dakota and eastern South Dakota through the Upper Midwest and Great Lakes into northwestern Ohio: Heavy rain may create localized flooding and reduced visibility, with the affected area extending farther east across the Great Lakes on Saturday. Major highways potentially affected include I-29, I-35, I-55, I-65, I-71, I-75, I-80, I-90, I-94.

— Friday, September 18 through Sunday, September 20: From southeastern Kansas, Oklahoma and northeastern Texas through the southern Plains, Lower Mississippi Valley, Tennessee Valley and lower Ohio Valley: Hazardous heat may create challenging conditions. The longer-duration area extends from southeastern Missouri and Arkansas through southwestern Kentucky, Tennessee, Mississippi and northwestern Alabama. Major highways potentially affected include I-20, I-30, I-35, I-40, I-55, I-64, I-65, I-70.

Extended Outlook September 23rd through 29th:

— Wednesday, September 23 through Thursday, September 24: Much of Utah, Arizona, Colorado, New Mexico and Texas, plus parts of southwestern Kansas and northwestern Oklahoma: Heavy precipitation may develop, creating localized flooding and difficult travel. Major highways potentially affected include I-8, I-10, I-15, I-20, I-25, I-40, I-70.

— Wednesday, September 23 through Sunday, September 27: From Florida and the Southeast through the Mid-Atlantic into southeastern New York and southern New England: Heavy precipitation may develop, creating localized flooding and difficult travel. Major highways potentially affected include I-4, I-10, I-20, I-40, I-64, I-70, I-74, I-75, I-76, I-80, I-81, I-84, I-85, I-87, I-91, I-95.

Confidence in the Extended Outlook:

Confidence is average or the earlier period, with generally good agreement on the large-scale pattern but uncertainty in the details of individual systems. Confidence decreases to below average later in the outlook because of a more complex western pattern and greater uncertainty in tropical influences.

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Your route’s weather may vary from the general forecast — check your exact trip

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Weather Maps and National Outlooks

For current NWS hazards, severe-storm and hurricane outlooks, heavy-rain risk, wind, smoke, heat/winter risk, and other always-updating weather graphics, visit:

Access to real-time road information:

Phone numbers and websites for road conditions in all 50 states. Courtesy of the Cheyenne WY Weather Forecast Office

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Some useful links:

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