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

• Flash flooding is an immediate concern in a small portion of southeast Wisconsin this morning; do not drive onto flooded roads.
• Persistent heat continues across the central and southern Plains and into the Mississippi and Ohio Valleys, with heat-index values commonly near 100 to 110 degrees; the heat is likely to last into early next week.
• Organized thunderstorms may produce damaging wind gusts from the southern Great Lakes and Ohio Valley into the Appalachians and Mid-Atlantic today and tonight.

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:

— Eastern and south-central Oregon: A Flash Flood Watch remains in effect today. Heavy rain could quickly flood roads and trigger debris flows near recent wildfire burn scars in Harney, Malheur and Baker counties. I-84, US-20, US-26, US-95, US-395 potentially impacted.

— Southeastern Nevada: More widespread thunderstorms Sunday may produce localized flash flooding, with slot canyons particularly dangerous during the afternoon. I-11, I-15, US-93 potentially impacted.

— A small portion of west-central California: A Coastal Flood Advisory is in effect today for a small portion of the North Bay Interior Valleys, where low-lying locations may be affected.

— Coastal portions of southern California: Coastal Flood Advisories are in effect Saturday through Tuesday. Breaking waves of 4 to 10 feet, dangerous rip currents and minor to moderate coastal flooding are expected, peaking Monday and Tuesday; high tides may flood low-lying parking areas, walkways and some roads.

Weather Impacts Mountain:

— Eastern Montana and central and northern Wyoming: Red Flag Warnings are in effect today. Winds of 10 to 30 mph, with gusts up to 35 mph in several areas, will combine with very dry conditions to support rapid fire spread. I-25, I-90, I-94, US-12, US-14, US-16, US-20, US-26, US-85, US-87, US-212, US-287 impacted.

— Eastern and north-central Montana and a small portion of northeastern Wyoming: A conditional risk of severe thunderstorms exists Sunday. Storm development remains uncertain, but any storms that form could produce severe wind or hail. I-90, I-94, US-2, US-12, US-14, US-85, US-87, US-191, US-212 potentially impacted.

— Western and central Idaho: Flash Flood Watches remain in effect today across the Treasure Valley and Boise Mountains. Heavy rain could rapidly flood low-water crossings and mountain roads, with debris flows possible near recent burn scars; US-20 in particular may be affected. I-84, US-20, US-26, US-95 potentially impacted.

— Northeastern Colorado: Severe thunderstorms are possible Saturday, bringing locally hazardous weather and rapidly changing road conditions. I-76, US-6, US-30, US-34, US-385 potentially impacted.

— Southwestern Utah and north-central and northwestern Arizona: More widespread thunderstorms Sunday may produce flash flooding, with slot canyons particularly dangerous during the afternoon. Canyon routes and low-water crossings could be cut off quickly. I-11, I-15, I-70, US-50, US-89, US-89A, US-93 potentially impacted.

— Southeastern Arizona and western New Mexico: Widely scattered to scattered thunderstorms today could produce localized flash flooding, especially in low-lying areas, slot canyons and near or downstream of burn scars where soils remain wet. I-10, I-25, I-40, US-60, US-70, US-180, US-191, US-380, US-550 potentially impacted.

Weather Impacts Central:

— A small portion of eastern Wisconsin: A FLASH FLOOD WARNING is in effect until 9 a.m. CDT for a small portion of the region, while Flood Advisories cover nearby parts of eastern Wisconsin this morning. One to 3 inches of rain has fallen; the warned area could receive another 1 to 2 inches at rates of 0.5 to 1.5 inches in one hour. Rapid flooding and standing water may make roads, including I-43, impassable. I-41, I-43, US-10, US-41, US-45 impacted.

— Western North Dakota and west-central and northwestern South Dakota: Red Flag Warnings are in effect today. Gusts may reach 35 mph in North Dakota and 30 mph in South Dakota, supporting rapid fire spread. I-90, I-94, US-12, US-14, US-16, US-85, US-212 impacted.

— Most of North Dakota and northwestern Minnesota: Dense fog this morning may reduce visibility to one-quarter mile and make driving hazardous. I-29, I-94, US-2, US-52, US-59, US-83, US-85, US-281 impacted.

— Central and southern North Dakota, South Dakota, much of Nebraska, southwestern Minnesota, and western and central Iowa: Isolated large hail and severe wind gusts are possible Saturday afternoon into Saturday night. On Sunday, a conditional risk of severe wind and hail continues across North Dakota, central and northern South Dakota, western Minnesota and northwestern Iowa, though storm development remains uncertain. I-29, I-35, I-76, I-80, I-90, I-94 potentially impacted.

— A small portion of East Texas: A Flood Warning remains in effect today following rainfall-driven flooding. Flooded roads, including US-287, may be impassable. US-287 impacted.

— Northern and east-central Kansas, eastern Iowa, much of Missouri, and much of Illinois: Extreme Heat Warnings are in effect today, with many areas remaining under warnings Saturday and parts of Kansas continuing through Tuesday. Afternoon heat-index values will generally reach 100 to 110 degrees, and warm nights will provide little relief in parts of the region. I-29, I-35, I-55, I-64, I-70, I-74, I-80 impacted.

— Southern and east-central Nebraska, central and eastern Kansas, much of Iowa, central and southern Missouri, Tennessee, much of Arkansas, central and northern Mississippi, central and northern Alabama, most of Oklahoma, north-central Texas, a small portion of southern Wisconsin, northern Illinois, and central Louisiana: Heat Advisories cover these areas today, with many continuing through Saturday or Sunday and parts of Kansas through Tuesday. Heat-index values will generally reach 100 to 110 degrees. In central and eastern Tennessee, values may reach 105 to 108 degrees, especially in valley locations such as the Sequatchie Valley late this afternoon.

— South-central Minnesota: A Heat Advisory is in effect today, with heat-index values reaching 97 degrees.

— East-central Illinois, western Kentucky and Middle Tennessee: Severe thunderstorms capable of damaging wind gusts are possible Saturday afternoon and evening, bringing abrupt visibility reductions, strong crosswinds and localized road obstructions. I-64, I-65, I-69, I-70, US-31E, US-36, US-60, US-68 potentially impacted.

— A small portion of southeastern Louisiana: A Flood Advisory is in effect this morning for a small portion of the region. Up to 1 inch of rain has fallen, with another 1 to 2 inches expected; localized street flooding may affect low-lying roads. I-10, US-61, US-90 impacted.

— Eastern Alabama and the eastern Florida Panhandle: Strong thunderstorm wind gusts are possible Sunday afternoon and early evening, with heavy downpours briefly making travel hazardous. I-10, US-19, US-27, US-82, US-84, US-98, US-231, US-280, US-431 potentially impacted.

Weather Impacts East:

— Southwestern Indiana and western Kentucky: An Extreme Heat Warning remains in effect today and Saturday. Heat-index values of 105 to 110 degrees are expected, with overnight lows in the mid-70s providing little relief. I-24, I-64, I-69, US-60, US-68 impacted.

— Central and southern Lower Michigan, eastern and north-central Indiana, Ohio, eastern Kentucky, East Tennessee, West Virginia, southern and west-central Pennsylvania, most of Maryland, the District of Columbia, southern Delaware, Virginia, and central and northern North Carolina: A broad severe-thunderstorm episode is expected today through tonight. A couple of organized storm clusters may produce damaging wind gusts, while more widely scattered strong storms east of the Blue Ridge may also produce damaging gusts. Saturday afternoon and evening, damaging-wind-producing storms are possible from central and southern Indiana and southern Ohio through much of Kentucky, East Tennessee, southern and west-central West Virginia, much of Virginia, North Carolina, most of South Carolina and a small portion of north-central Georgia. I-20, I-40, I-64, I-65, I-70, I-71, I-74, I-75, I-76, I-79, I-80, I-81, I-85, I-87, I-90, I-94, I-95 potentially impacted.

— Indiana, central and western Ohio, central and eastern Kentucky, western and central West Virginia, and northwestern Georgia: Heat Advisories are in effect today, with heat-index values generally from 100 to 108 degrees and locally reaching 110 degrees in northwestern Indiana. Advisories continue through Saturday across southern Indiana and southern and central Kentucky, where nighttime temperatures will fall only into the low to mid-70s.

— Maine and New Hampshire: Areas of fog this morning may occasionally reduce visibility to around one-quarter mile across central and northern Maine, central and southern Maine, and New Hampshire. I-89, I-93, I-95, US-1, US-2, US-3, US-4, US-201 impacted.

— Eastern and central Virginia, central and eastern North Carolina, and eastern and north-central South Carolina: Heat Advisories are in effect today, with heat-index values generally reaching 105 to 109 degrees.

— Southeastern Virginia and eastern North Carolina: Multiple rounds of thunderstorms Saturday, including more widespread storms late in the afternoon and evening, may cause localized flash flooding and make low-lying or poorly drained roads impassable. I-40, I-64, I-95, US-13, US-17, US-58, US-60, US-64, US-70, US-74, US-158, US-264, US-421, US-460, NC-12 potentially impacted.

— Coastal southern South Carolina, central and southern Georgia, and northern Florida: Strong thunderstorm wind gusts are possible Sunday afternoon and early evening, with heavy rain briefly making travel hazardous. I-10, I-16, I-75, I-95, US-1, US-17, US-19, US-23, US-25, US-27, US-41, US-80, US-82, US-84, US-98, US-280, US-301, US-431 potentially impacted.

Tropical Weather Outlook for the next 7 days:

— Eastern Pacific, about 1,025 miles east of Hilo, Hawaii: Hurricane Karina has maximum sustained winds near 100 mph and is moving west-northwest at 9 mph. Gradual weakening is forecast during the next 48 hours, although Karina is expected to remain a hurricane for another day or two. This system is not currently expected to threaten the continental United States.

— Eastern Pacific and the Southern California coast: Hurricane Marie has maximum sustained winds near 100 mph and is moving west-northwest at 9 mph well offshore. Swells are expected to spread north to Southern California through the weekend, bringing life-threatening surf and rip-current conditions.

Extended Hazard Outlook

Outlook Sunday September 6th through Thursday September 10th:

— Sunday, September 6: The Southwest and Intermountain West, extending into much of Montana and northwestern Wyoming: Heavy rain may create localized flooding and difficult travel. Major highways potentially affected include I-8, I-10, I-15, I-40, I-70, I-80, I-84, I-90.

— Sunday, September 6 through Thursday, September 10: From the central and southern Plains through the Mid- and Lower Mississippi Valley: Hazardous heat may create challenging conditions. Major highways potentially affected include I-10, I-20, I-29, I-30, I-35, I-40, I-55, I-64, I-70, I-80.

Extended Outlook September 11th through 17th:

— Friday, September 11 through Saturday, September 12: From the central and southern Plains through the Mississippi Valley and Southeast to the Carolinas: Extreme heat may develop, creating challenging conditions, especially for long drives and exposed routes. Major highways potentially affected include I-10, I-20, I-29, I-30, I-35, I-40, I-55, I-64, I-65, I-70, I-74, I-75, I-85, I-87, I-95.

— Friday, September 11 through Sunday, September 13: From southeastern California and Arizona through Utah and the central Rockies into Colorado and New Mexico: Heavy precipitation may develop, creating localized flooding and difficult travel. Major highways potentially affected include I-8, I-10, I-15, I-25, I-40, I-70, I-80, I-84.

Confidence in the Extended Outlook:

Confidence is somewhat better for the earlier period, with generally good agreement on the main pattern. Confidence decreases later because of a complex western pattern, uncertainty related to tropical systems, and large differences in precipitation forecasts.

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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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