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

• Dangerous heat affects a broad area from the Plains and Upper Midwest through the Mississippi Valley and Southeast today and Tuesday, with heat index values locally reaching 119 degrees.
• Severe thunderstorms threaten travel from the High Plains through the Great Lakes and Ohio Valley today, then shift toward the Mid-Atlantic and Southeast Tuesday and the northern High Plains and Southeast Wednesday.
• FLASH FLOOD WARNINGS affect south-central Illinois and middle Tennessee early today, while a broader flash-flood risk develops from the northern Mid-Atlantic into New England Tuesday through Wednesday night.

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:

— Northeastern Nevada: A Heat Advisory continues today, with heat index values up to 98 making outdoor travel stops more difficult.

— Southern Nevada, much of Southern California, and western Arizona: Extreme Heat Warnings and Heat Advisories continue today, with the southeast California and southwest Arizona desert heat lasting through Wednesday. Temperatures may reach 120 degrees in Death Valley National Park and 116 degrees elsewhere in the deserts, while coastal Southern California reaches the low 80s to low 90s. I-8, I-10, I-11, I-15, I-40, US-60, US-93, US-95, US-395, CA-14 impacted.

Weather Impacts Mountain:

— Southeastern Montana: Extreme Heat Warnings and a Heat Advisory continue today, with temperatures up to 103 degrees making daytime travel and outdoor stops difficult. I-94, US-12, US-212 impacted.

— Southeast Montana, eastern Wyoming and eastern Colorado: More organized severe thunderstorms may produce damaging winds and hail today. The greatest risk of severe weather will be across northeastern Colorado. I-25, I-70, I-76, I-80, I-90, US-6, US-14, US-16, US-18, US-20, US-24, US-26, US-30, US-34, US-36, US-40, US-50, US-85, US-212, US-287, US-385, US-400 potentially impacted.

— Eastern Montana and eastern Wyoming: Isolated severe thunderstorms may produce mainly damaging winds Wednesday afternoon and evening. I-25, I-80, I-90, I-94, US-2, US-12, US-14, US-16, US-18, US-20, US-26, US-30, US-85, US-212, US-287 potentially impacted.

— East-central Idaho: A Red Flag Warning continues today, with wind gusts up to 30 mph supporting rapid fire spread. US-93 impacted.

— Southeast Wyoming much of eastern Colorado: Isolated severe thunderstorms may produce severe wind gusts and large hail Tuesday. I-25, I-70, I-76, I-80, US-24, US-26, US-30, US-34, US-36, US-40, US-50, US-85, US-285, US-287, US-385 potentially impacted.

— Much of Utah, northwest and southeast Colorado, south-central Arizona, much of central and eastern New Mexico, and far-west Texas, including Phoenix, Glen Canyon Recreation Area and Lake Powell, Zion National Park, Colorado Springs, Pueblo, and Albuquerque.: Extreme Heat Warnings and Heat Advisories today and Tuesday, with Phoenix-area heat continuing through Wednesday. Temperatures may reach 113 degrees, I-8, I-10, I-17, US-60, US-89 impacted.

— South-central and southeast Arizona: Isolated severe thunderstorms may produce damaging wind gusts today. I-8, I-10, I-19, US-60, US-70, US-89, US-191 potentially impacted.

Weather Impacts Central:

— South-central Illinois: A FLASH FLOOD WARNING early this morning in eastern Effingham County. Between 4 and 6 inches of rain have fallen, with up to 1 additional inch possible near Teutopolis and Dieterich; highways, streets and underpasses may flood. I-57, I-70 impacted.

— Middle Tennessee: A FLASH FLOOD WARNING early this morning in Lawrence County. Between 0.5 and 1 inch of rain has fallen, rain may fall at 0.5 to 1 inch per hour, and another half-inch of rainfall is possible; flooding of roads, streets and underpasses is ongoing or expected shortly. US-64 impacted.

— Western North Dakota, western South Dakota, and far-western Nebraska: Isolated severe thunderstorms capable mainly of damaging winds are possible Wednesday afternoon and evening. I-80, I-90, I-94, US-2, US-12, US-14, US-16, US-18, US-20, US-26, US-30, US-52, US-83, US-85, US-212, US-385 potentially impacted.

— Southeastern South Dakota, southwest Minnesota, and northwestern Iowa: Areas of fog and a Dense Fog Advisory this morning, with visibility as low as one-quarter mile and rapid visibility changes. I-29, I-90, US-14, US-18, US-59, US-81 impacted.

— Western, central and southern South Dakota, most of Nebraska, and northwestern Kansas: Severe thunderstorms may produce damaging wind gusts and hail today. The greatest risk of severe weather will be across western South Dakota, western Nebraska, and adjacent northwestern Kansas. I-70, I-76, I-80, I-90, US-6, US-12, US-14, US-16, US-18, US-20, US-24, US-26, US-30, US-34, US-36, US-40, US-50, US-83, US-85, US-136, US-212, US-281, US-283, US-385, US-400 potentially impacted.

— Southeast South Dakota, most of Nebraska, Kansas, Oklahoma, northern and far-westernTexas, southern Minnesota, central and southern Wisconsin, Iowa, Missouri, Illinois, western Indiana and Kentucky, western and central Tennessee, Arkansas, most of Louisiana, Mississippi, most of Alabama, and the Florida Panhandle: Extreme Heat Warnings and Heat Advisories affect the region today, while Extreme Heat Watches and additional advisories continue or develop in parts of the region Tuesday. Heat index values will range from 110 to 119 degrees, creating dangerous heat for daytime outdoor stops. I-10, I-12, I-20, I-22, I-24, I-29, I-30, I-35, I-39, I-40, I-44, I-49, I-55, I-57, I-59, I-64, I-65, I-69, I-70, I-72, I-74, I-80, I-88, I-90, I-94 impacted.

— Southern Nebraska Panhandle: Isolated severe thunderstorms may produce severe wind gusts Tuesday. I-76, I-80, US-26, US-30, US-85, US-385 potentially impacted.

— Northeast Minnesota and northern Wisconsin: Severe Thunderstorm Watches continue this morning, with severe storms possible. I-35, US-2, US-8, US-41, US-45, US-51 potentially impacted.

— Minnesota Arrowhead, most of Wisconsin, eastern Iowa, central and eastern Missouri, Illinois, Kentucky, and much of Tennessee: Organized severe thunderstorms may produce damaging winds, large hail and a chance of tornadoes today into tonight. The greatest risk of severe weather will be across southeastern Wisconsin and northern Illinois. I-24, 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-75, I-80, I-88, I-90, I-94 potentially impacted.

— Southern Wisconsin, eastern Iowa, and northern and central Illinois: Areas of fog and Dense Fog Advisories this morning, with visibility less than one-quarter mile in some spots, and abrupt changes over short distances. I-39, I-41, I-43, I-55, I-74, I-80, I-88, I-90, I-94 impacted.

— Southeastern Alabama and the eastern Florida Panhandle: Isolated severe thunderstorms capable mainly of damaging winds are possible Wednesday afternoon and evening. I-10, US-19, US-27, US-29, US-80, US-82, US-84, US-98, US-231, US-280, US-431 potentially impacted.

Weather Impacts East:

— Western Michigan Upper Peninsula: A Severe Thunderstorm Watch continues this morning, with severe storms possible. US-2, US-45 potentially impacted.

— Eastern Michigan Upper Peninsula: A Dense Fog Advisory this morning, with visibility one-quarter mile or less making driving difficult. US-2 impacted.

— Michigan, Indiana, Ohio, Kentucky, most of Tennessee, West Virginia, far-western New York, Pennsylvania, New Jersey and New York City, Maryland, the District of Columbia, Delaware, Virginia, and northern and western North Carolina: Organized severe thunderstorms may produce damaging winds, large hail and the chance of tornadoes today into tonight. The greatest risk of severe weather will be across southern portions of Michigan’s Lower Peninsula, much of Indiana, and western Ohio. 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.

— Northwest Indiana, much of central and southern Ohio, eastern Kentucky, western and southern West Virginia, southwest Pennsylvania, and southwest Virginia: Areas of fog and Dense Fog Advisories this morning, with visibility falling below one-quarter mile in the thickest valley and patchy dense fog. I-64, I-65, I-68, I-70, I-71, I-74, I-75, I-77, I-79, I-81 impacted.

— Western, central and southern Indiana: A Heat Advisory continues today, with heat index values up to 110 degrees.

— Southeastern Ohio, eastern Kentucky, eastern Tennessee, West Virginia, much of Pennsylvania, New Jersey, Maryland, the District of Columbia, Delaware, Virginia, North Carolina, most of South Carolina, and northern Georgia: More organized severe thunderstorms may produce damaging winds, isolated hail and the chance of tornadoes 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.

— Southern New Hampshire, southern Vermont, Massachusetts except Cape Cod, Rhode Island, Connecticut, and southeastern New York: Flash flooding is possible Wednesday into early Thursday as 2 to 4 inches of rain is forecast to fall across the region. I-78, I-80, I-84, I-86, I-87, I-88, I-89, I-90, I-91, I-93, I-95 potentially impacted.

— Southwestern Massachusetts, western Connecticut, southeastern New York, eastern Pennsylvania, and much of New Jersey: Flash flooding is possible Tuesday into Wednesday as heavy rain develops across the northern Mid-Atlantic and southern New England. I-76, I-78, I-80, I-81, I-83, I-84, I-86, I-87, I-88, I-90, I-91, I-95 potentially impacted.

— Central Maryland coast near Annapolis: A Coastal Flood Advisory continues this morning, with up to 1.5 feet of inundation above ground level potentially covering vulnerable shoreline parking areas.

— Southeastern North Carolina near Wilmington and the lower Cape Fear River: A Coastal Flood Advisory is in effect from 7 p.m. to midnight EDT tonight, with up to one-half foot of inundation above ground level covering vulnerable low-lying roads.

— Southeast South Carolina, southern and southeast Georgia, and northern and central Florida: Heat Advisories continue today, with heat index values of 107 to 111 degrees making outdoor stops difficult.

— Southeast South Carolina, southern Georgia, and adjacent northern Florida: Isolated severe thunderstorms capable mainly of damaging winds are possible Wednesday afternoon and evening. I-10, I-16, I-26, I-75, I-95, US-1, US-17, US-19, US-23, US-25, US-27, US-41, US-52, US-78, US-80, US-82, US-84, US-98, US-280, US-301, US-431 potentially impacted.

Tropical Weather Outlook for the next 7 days:

— Hurricane Genevieve is not currently expected to disrupt road travel in the continental United States. However, life-threatening surf and rip currents are affecting southwestern Mexico and southern Baja California and will spread northward along Baja California’s west coast by tonight.

Outlook Wednesday July 29th through Sunday August 2nd:

— Wednesday, July 29 through Sunday, August 2: Northern Plains and Upper Midwest: Hazardous heat may create challenging conditions from central and eastern Montana and northeastern Wyoming through the Dakotas into Minnesota and northwestern Nebraska. The broader concern across North Dakota, South Dakota, and Minnesota ends Thursday, while heat continues through Sunday from Montana and northeastern Wyoming into southwestern North Dakota, and northwestern South Dakota. Major highways potentially affected include I-29, I-90, I-94.

— Wednesday, July 29 through Sunday, August 2: New Mexico and Texas: Hazardous heat may create challenging conditions. Major highways potentially affected include I-10, I-20, I-25, I-35, I-40.

— Wednesday, July 29 through Saturday, August 1: Southern Plains and Lower Mississippi Valley: Hazardous heat may create challenging conditions from southeastern Colorado and northeastern New Mexico through the central and southern Plains into the Lower Mississippi Valley, southwestern Alabama, and the Florida Panhandle. Major highways potentially affected include I-10, I-20, I-30, I-35, I-40, I-55, I-65.

— Wednesday, July 29: Southeast: Hazardous heat may create challenging conditions from southern Missouri and Arkansas through Tennessee and the central Gulf Coast into Florida, Georgia, and southern South Carolina. 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.

— Wednesday, July 29: Northeast: Heavy rain may create localized flooding and reduced visibility from northeastern Pennsylvania and New Jersey through New York and New England. Major highways potentially affected include I-80, I-84, I-87, I-90, I-91, I-95.

— Thursday, July 30 through Sunday, August 2: Southern California, Southwest, and Intermountain West: Hazardous heat may create challenging conditions across southern California, Arizona, southeastern Nevada, Utah, and nearby portions of Colorado and southwest New Mexico. Major highways potentially affected include I-5, I-8, I-10, I-15, I-40, I-70, I-80, I-84.

Extended Outlook August 3rd through August 9th:

— Monday, August 3 through Sunday, August 9: Western, central, and southern United States: Extreme heat may develop from Washington and Oregon through much of the West, central and southern Plains, Lower Mississippi Valley, and Southeast into Florida and southern Georgia, creating challenging conditions. Extreme heat is expected Monday, August 3, across eastern California, most of Nevada, much of Utah, and a small portion of southwestern Idaho. 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-75, I-76, I-80, I-84, I-90, I-94, I-95.

— Monday, August 3 through Sunday, August 9: Southeastern California and central and southern Arizona: Heavy precipitation may develop, creating localized flooding and difficult travel. Major highways potentially affected include I-8, I-10, I-40.

— Monday, August 3 through Wednesday, August 5: Northern and central Rockies and adjacent Plains: High winds may develop, creating difficult driving, especially around Bozeman Pass and Eisenhower Tunnel. Major highways potentially affected include I-15, I-25, I-70, I-76, I-80, I-90, I-94.

— Monday, August 3 through Wednesday, August 5: Northern Plains, Great Lakes, Ohio Valley, and central Appalachians: Extreme heat may develop from the northern Plains and Upper Midwest through the Great Lakes and Ohio Valley into West Virginia, western Pennsylvania, and far-western New York, creating challenging conditions. Major highways potentially affected include I-29, I-35, I-55, I-64, I-65, I-70, I-71, I-74, I-75, I-76, I-79, I-80, I-90, I-94.

Confidence in the Extended Outlook:

Confidence is average for the earlier period, with generally good agreement on the large-scale pattern but some uncertainty in the timing of weather systems affecting the East. Confidence decreases to below average later in the outlook because the pattern becomes more variable and temperature and precipitation signals are 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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