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

• Significant heat affects a broad area of the central U.S. from the northern Plains through the Mississippi Valley and southern states today, with heat index values up to 116 degrees and some alerts continuing through Tuesday.
• Severe thunderstorms threaten the northern Plains, Upper Midwest, and Great Lakes this afternoon into tonight, with damaging winds possibly above 75 mph, very large hail, and a tornado risk.
• Another broad severe-weather threat develops Monday from the Great Lakes and Ohio Valley into the Mid-Atlantic, followed by thunderstorms damaging-wind potential across the Appalachians and Carolinas on Tuesday.

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:

— South-central Oregon, northwestern Nevada, and northeastern California: Red Flag Warnings today, with wind gusts up to 35 mph supporting rapid fire spread. I-80, US-50, US-97, US-395, CA-139, CA-299 impacted.

— Southern Nevada, southeast California, and northwest and southwest Arizona: Extreme Heat Warnings and Heat Advisories today and Monday, with desert highs of 107 to 120 degrees, including 120 degrees in Death Valley National Park. Coastal Southern California will reach 82 to 92, while inland valleys and mountains reach the 90s to 105 degrees. I-8, I-10, I-11, I-15, I-40, US-60, US-93, US-95, US-395, CA-14 impacted.

Weather Impacts Mountain:

— Southern Montana and northern Wyoming: Isolated severe thunderstorms may produce damaging wind today. I-15, I-25, I-90, I-94, US-14, US-16, US-20, US-85, US-87, US-89, US-191, US-212, US-287 potentially impacted.

— Southwest Montana and much of Montana east of the Rockies, southeastern Idaho, northern, central and eastern Wyoming, western South Dakota, and the Nebraska Panhandle: Extreme Heat Warnings and Heat Advisories today, with highs up to 108 degrees and heat index values up to 103 degrees. The warnings continue Monday across southeast Montana. I-94, US-2, US-12, US-87, US-191, US-212 impacted.

— Eastern Wyoming and northeastern Colorado: Isolated severe thunderstorms may produce damaging wind Monday. I-25, I-80, US-16, US-18, US-20, US-26, US-30, US-85 potentially impacted.

— Eastern Wyoming: Isolated severe wind gusts are possible Tuesday. I-25, I-80, I-90, US-14, US-16, US-18, US-20, US-26, US-30, US-85, US-212, US-287 potentially impacted.

— Northwest, eastern, and southern Utah and parts of northwestern Colorado: Extreme Heat Warning and Heat Advisories today through Tuesday, with highs up to 109 degrees around Glen Canyon Recreation Area/Lake Powell, Zion National Park, and other lower-elevation areas, and in the lower 100’s elsewhere. US-89 impacted.

— Eastern Colorado: Heat Advisories today, with temperatures up to 109 degrees around the Denver metro, Colorado Springs, Pueblo, and the eastern plains.

— Western and south-central Arizona, including the Phoenix Metro Area. Also Grand Canyon National Park below 4000 feet: Extreme Heat Warnings today, continuing through Monday around Phoenix, with temperatures up to 118 degrees; lower Grand Canyon locations may reach 112 to 114 degrees. I-8, I-10, I-17, US-60, US-89A, US-180 impacted.

— South-central and southeast Arizona: Isolated severe thunderstorms may produce damaging wind Monday. I-10, I-19, US-89, US-191 potentially impacted.

— West-central New Mexico: Flood Watch today, with slow-moving storms capable of rainfall rates above 2 inches per hour and repeated rounds over recently wet ground. Flash flooding may cover urban, low-lying, and poor-drainage roads. I-40, US-60, US-491 potentially impacted.

Weather Impacts Central:

— Much of North Dakota, South Dakota, Nebraska, Kansas, Oklahoma, northern Texas, Minnesota, Wisconsin, Iowa, Missouri, much of Illinois, western Kentucky, western Tennessee, Arkansas, northern and central Louisiana, much of Mississippi, and adjacent northwest Alabama: Extreme Heat Warnings, Watches and Advisories affect this region today, with heat index values up to 116 degrees. Heat continues through at least Tuesday across much of this region. I-24, I-29, I-30, I-35, I-35E, I-35W, I-40, I-44, I-49, I-55, I-57, I-64, I-69, I-70, I-72, I-74, I-80, I-88, I-90, I-94 impacted.

— Eastern North Dakota, eastern South Dakota, much of Nebraska, Minnesota, Wisconsin, Iowa, northern and eastern Missouri, Illinois, western and central Kentucky, and northwest Tennessee: Severe thunderstorms are possible mainly this afternoon into tonight, with damaging winds possibly above 75 mph, large to very large hail, and some tornado risk. I-24, I-29, I-35, I-35E, I-35W, I-39, I-40, I-41, I-43, I-44, I-55, I-57, I-64, I-65, I-69, I-70, I-72, I-74, I-80, I-88, I-90, I-94 potentially impacted.

— Southwest South Dakota, western Nebraska, and northwest Kansas: Isolated severe thunderstorms may produce damaging wind Monday. I-70, I-76, I-80, US-6, US-16, US-18, US-20, US-24, US-26, US-30, US-34, US-36, US-83, US-85, US-136, US-283, US-385 potentially impacted.

— Western South Dakota and far-western Nebraska: Isolated severe wind gusts are possible Tuesday. I-80, US-20, US-26, US-30, US-85, US-385 potentially impacted.

— South Texas: Fog this morning may reduce visibility to one-quarter mile or less in spots, with rapid changes over short distances. I-37, I-69E, US-59, US-77, US-87, US-281 impacted.

— The Minnesota Arrowhead, most of Wisconsin, most of Illinois, Kentucky, and much of Tennessee: Scattered severe thunderstorms are possible Monday into Monday night, with damaging wind, large hail, and a limited tornado risk. The greatest risk of severe weather will be across eastern Wisconsin and northeastern Illinois. I-24, I-39, I-40, I-41, I-43, I-55, I-57, I-64, I-65, I-69, I-70, I-72, I-74, I-75, I-80, I-88, I-90, I-94 potentially impacted.

— Northern Wisconsin: Dense Fog Advisories this morning, with visibility one-quarter mile or less in places and rapidly changing driving conditions. I-39, US-2, US-8, US-45, US-51, US-141 impacted.

— Southeast Iowa, parts of Missouri and Illinois, western Kentucky, and southwest Indiana: Locally dense fog this morning, with visibility under one-half mile and locally near zero. I-24, I-55, I-57, I-64, I-69, I-70, I-72, I-74, I-80 impacted.

Weather Impacts East:

— Michigan Upper Peninsula: Patchy fog this morning may reduce visibility to one-quarter mile or less. US-2, US-41, US-45 impacted.

— Michigan, Indiana, much of Ohio, and western and central Kentucky: Severe thunderstorms are possible mainly this afternoon into tonight, with damaging winds possibly above 75 mph, large to very large hail, and some tornado risk. The greatest risk of severe weather will be across much of northern and western Michigan, and northwestern Indiana. I-57, I-64, I-65, I-69, I-70, I-71, I-74, I-75, I-76, I-77, I-80, I-90, I-94, I-96 potentially impacted.

— Michigan, Indiana, Ohio, Kentucky, central and eastern Tennessee, West Virginia, far-western and southern New York, Pennsylvania, Maryland, District of Columbia, Delaware, New Jersey, most of Virginia, and western and northern North Carolina: Severe thunderstorms are possible Monday into Monday night, with damaging wind, large hail, and some tornado risk. The greatest risk of severe weather will be across most of Michigan, most of Indiana, Ohio, north-central Kentucky, western West Virginia, and western Pennsylvania. I-26, I-40, I-57, I-64, I-65, I-66, I-68, I-69, I-70, I-71, I-73, I-74, I-75, I-76, I-77, I-78, I-79, I-80, I-81, I-83, I-84, I-85, I-86, I-87, I-90, I-94, I-95, I-96, I-97, I-99 potentially impacted.

— Western Indiana: Fog this morning may suddenly reduce visibility to one-quarter mile or less before dissipating around 9 a.m. EDT. I-65, I-70, I-74, US-36 impacted.

— Parts of eastern Kentucky and eastern Tennessee, West Virginia, most of southern and central Pennsylvania, Maryland, District of Columbia, Delaware, New Jersey, Virginia, North Carolina, northern South Carolina, and northern Georgia: Scattered severe thunderstorms capable mainly of damaging wind are possible Tuesday into Tuesday evening. I-20, I-24, I-26, I-40, I-59, I-64, I-66, I-68, I-70, I-73, I-74, I-75, I-76, I-77, I-78, I-79, I-80, I-81, I-83, I-84, I-85, I-87, I-95, I-97, I-99 potentially impacted.

— Southwestern Massachusetts, western Connecticut, southeastern New York, eastern Pennsylvania, and much of New Jersey: Flash flooding is possible Tuesday into Wednesday as more widespread thunderstorms develop; rainfall totals may reach 2 to 4 inches Wednesday into Wednesday night. I-76, I-78, I-80, I-81, I-84, I-86, I-87, I-88, I-90, I-91, I-95 potentially impacted.

— South-central and southeast Pennsylvania, central Maryland, District of Columbia, northern and central Virginia, central North Carolina, much of South Carolina, eastern Georgia, and north-central and northeast Florida Peninsula: Isolated severe thunderstorms may produce damaging wind today. I-4, I-10, I-16, I-20, I-26, I-40, I-64, I-66, I-70, I-73, I-74, I-75, I-76, I-77, I-78, I-81, I-83, I-85, I-87, I-95, I-97 potentially impacted.

— Southeast Virginia and central and northeastern North Carolina: A Dense Fog Advisory, with visibility near one-quarter mile in central North Carolina and below a mile elsewhere. I-40, I-64, I-73, I-74, I-85, I-87, I-95 impacted.

— Central and southeastern South Carolina: Slow-moving thunderstorms near a lingering front may cause flash flooding today, covering low roads and poor-drainage areas. I-16, I-26, I-95, US-17, US-52, US-78, US-301 potentially impacted.

Tropical Weather Outlook for the next 7 days:

— No significant impacts to the Continental U.S.

Outlook Tuesday July 28th through Saturday August 31st:

— Tuesday, July 28 through Saturday, August 1: The northern Plains and Minnesota: Hazardous heat may create challenging conditions from Montana and northeastern Wyoming into the Dakotas, with the Minnesota portion supported through Thursday, July 30. Major highways potentially affected include I-29, I-90, I-94.

— Tuesday, July 28 through Saturday, August 1: From New Mexico and the southern Plains into the Lower Mississippi Valley and central Gulf Coast: Hazardous heat may create challenging conditions. Major highways potentially affected include I-10, I-20, I-25, I-30, I-35, I-40, I-55, I-65.

— Tuesday, July 28 through Wednesday, July 29: From southern Missouri and Arkansas through Tennessee and the Southeast: Hazardous heat may create challenging conditions. Major highways potentially affected include I-4, I-10, I-20, I-30, I-40, I-55, I-65, I-75, I-85, I-95.

— Tuesday, July 28 through Wednesday, July 29: From the Mid-Atlantic through the Northeast: Heavy rain may create localized flooding and reduced visibility across the Mid-Atlantic and Northeast on Tuesday, July 28, and from northeastern Pennsylvania and northern New Jersey through New England on Wednesday, July 29. Major highways potentially affected include I-64, I-76, I-80, I-81, I-84, I-87, I-90, I-91, I-95.

— Thursday, July 30 through Saturday, August 1: Southern California, the Great Basin, and parts of the Southwest: Hazardous heat may create challenging conditions. Major highways potentially affected include I-5, I-8, I-10, I-15, I-40, I-70, I-80, I-84.

Extended Outlook August 2nd through August 8th:

— Sunday, August 2 through Saturday, August 8: From the Pacific Northwest and Southwest through the central and southern Plains, Lower Mississippi Valley, and parts of the Southeast: Extreme heat may develop across the broad area, with an additional southern Great Lakes and Ohio Valley extent Tuesday, August 4 through Wednesday, August 5. Extreme heat is likely Sunday through Wednesday across much of the West and Southwest into New Mexico and Texas, and is expected Sunday across much of California, southwestern Idaho, Nevada, Utah, and Arizona. Major highways potentially affected include I-4, I-5, I-8, I-10, I-15, I-20, I-25, I-29, I-30, I-35, I-40, I-55, I-64, I-65, I-70, I-71, I-74, I-75, I-76, I-80, I-84, I-90, I-94, I-95.

— Sunday, August 2 through Saturday, August 8: Southeastern California, southern Nevada, and most of Arizona: Heavy precipitation may develop, creating localized flooding and difficult travel. Major highways potentially affected include I-8, I-10, I-15, I-40.

— Sunday, August 2 through Tuesday, August 4: The northern and central Plains and adjacent Rockies: Strong winds may develop, creating hazardous crosswinds for high-profile vehicles, including near Bozeman Pass and Eisenhower Tunnel. Major highways potentially affected include I-15, I-25, I-70, I-76, I-80, I-90, I-94.

— Sunday, August 2 through Monday, August 3: The Southeast from Florida and Georgia, and along the Coastal Carolinas: Heavy precipitation may develop, creating localized flooding and difficult travel. Major highways potentially affected include I-4, I-10, I-40, I-65, I-75, I-95.

Confidence in the Extended Outlook:

Confidence is stronger for the earlier period, with generally good agreement on the large-scale pattern. Confidence decreases later as the pattern transitions and temperature and precipitation signals become less consistent.

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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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