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

• Tropical Storm Edouard threatens southeast Texas and southwest Louisiana today with strengthening winds, 3 to 5 feet of storm surge and flash-flooding rain.
• Scattered severe storms threaten travel from South Dakota and Nebraska through the Great Lakes and Northeast today, with damaging winds, large hail and isolated tornadoes possible.
• Heat-index values up to 110 degrees affect the Mississippi and Ohio valleys through Friday.

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:

— Northern coastal Puget Sound in Washington: A Wind Advisory Wednesday brings gusts up to 40 mph. US-101 impacted.

— Northwestern and western Nevada and northeastern California: Red Flag Warnings today, with gusts up to 50 mph supporting rapid fire spread. I-80, US-50, US-395, CA-139, CA-299 impacted.

Weather Impacts Mountain:

— Southwestern Montana, including the Madison River Valley: A High Wind Watch Wednesday and Thursday calls for gusts up to 60 mph and potentially difficult driving. US-287 potentially impacted.

— Northern Montana: Isolated severe thunderstorms Wednesday afternoon may produce a few severe wind gusts. I-15, I-90, US-2, US-12, US-87, US-89, US-93, US-191, US-287 potentially impacted.

— Central Idaho: A Red Flag Warning today, with frequent lightning and outflow gusts up to 40 mph supporting rapid fire spread. US-20, US-26, US-93 impacted.

— Eastern Colorado: Isolated severe thunderstorms today may produce damaging wind and large hail. I-70, I-76, I-80, US-6, US-24, US-30, US-34, US-36, US-40, US-50, US-287, US-385, US-400 potentially impacted.

— South-central and southeast Arizona: Flash flooding is possible Wednesday into Thursday morning as locally heavy rain may cover roads and low crossings. I-10, I-19, US-89, US-191 potentially impacted.

Weather Impacts Central:

— Southeast Texas, including Chambers and portions of Liberty, Hardin, Orange and Jefferson counties: A STORM SURGE WARNING, Tropical Storm Warnings and a Hurricane Watch continue today, while storm-surge concerns last through Wednesday morning. Storm surge could reach 3 to 5 feet above ground near Port Arthur and Sabine Pass, with up to 2 feet in southern Orange County. Winds may reach 45 to 55 mph with gusts up to 65 mph, and additional rainfall may reach 3 to 6 inches with locally higher totals, making some roads and bridges impassable. I-10, US-90, US-287 impacted.

— Central and eastern South Dakota, much of Nebraska, western Kansas, southern Minnesota, much of Wisconsin, northern Iowa and far northern Illinois: Scattered severe thunderstorms today may produce damaging wind, large hail and a tornado. I-29, I-35, I-35E, I-35W, I-39, I-41, I-43, I-55, I-57, I-70, I-76, I-80, I-88, I-90, I-94 potentially impacted.

— Southern Minnesota, southern Wisconsin, northern and eastern Iowa and northern Illinois: Isolated severe thunderstorms are possible Thursday. I-29, I-35, I-39, I-41, I-43, I-55, I-57, I-70, I-72, I-74, I-80, I-88, I-90, I-94 potentially impacted.

— Central and southern Iowa, Missouri, Illinois, western Kentucky, western Tennessee, central and eastern Arkansas, northeastern Louisiana and western Mississippi: Heat Advisories through Friday with heat-index values up to 110 degrees.

— Southeast Texas, including Houston and Galveston: Flood Watches today and Wednesday associated with Tropical Storm Edouard, with rainfall totals of 6 to 9 inches or more and rates of 3 to 4 inches per hour possible in the heaviest downpours. Flash flooding may cover urban, poor-drainage and low-lying roads. I-10, I-45, I-69, US-59, US-90, US-190, US-287, US-290 potentially impacted.

— Southeast Texas and southwest Louisiana: A Wind Advisory today and Wednesday associated with Tropical Storm Edouard brings gusts up to 45 mph. I-10, US-90, US-171, US-190, US-287 impacted.

— Southeastern Minnesota, much of Wisconsin and northeastern to central Iowa: Dense Fog Advisories and Special Weather Statements for fog continue this morning, with visibility falling to one-quarter mile or less and changing rapidly over short distances. I-39, I-90, I-94, US-2, US-8, US-10, US-18, US-20 impacted.

Weather Impacts East:

— Much of Michigan: Dense Fog Advisories and a Special Weather Statement for fog continue this morning, with visibility of one-quarter mile or less in places and locally difficult driving. I-75, US-2, US-23, US-31, US-41, US-45 impacted.

— Michigan’s Lower Peninsula, northern Indiana, norther, central and eastern Ohio, northern West Virginia, western Connecticut, western and southern New York, New Jersey, Pennsylvania, Maryland, the District of Columbia, Delaware and northern and eastern Virginia: Scattered severe thunderstorms today may produce damaging wind, large hail and a tornado. The greatest risk of severe weather will be across New Jersey, and most of Pennsylvania and adjacent New York. I-64, I-66, I-68, I-69, I-70, I-71, I-75, I-76, I-77, I-78, I-79, I-80, I-81, I-83, I-84, I-86, I-87, I-88, I-90, I-91, I-94, I-95, I-96, I-97, I-99 potentially impacted.

— Southern Michigan, much of Indiana and Ohio, northern Kentucky, western West Virginia; also southeastern Pennsylvania, west-central New Jersey and northern Delaware: Heat Advisories today, with heat-index values up to 105. Heat Advisories continue through Thursday from southern Michigan through the Ohio Valley.

— Most of Michigan’s Lower Peninsula, northeastern Ohio, northern West Virginia, western Connecticut, most of New York, New Jersey, Pennsylvania, Maryland, the District of Columbia, Delaware and northern Virginia: Scattered severe thunderstorms Wednesday may produce damaging wind, large hail and a tornado. I-66, I-68, I-69, I-70, I-71, I-75, I-76, I-77, I-78, I-79, I-80, I-81, I-83, I-84, I-86, I-87, I-88, I-90, I-91, I-94, I-95, I-96, I-97, I-99 potentially impacted.

— Southern Michigan, much of Indiana, Ohio, north-central Kentucky, West Virginia, most of New Jersey, most of Pennsylvania, Maryland, the District of Columbia, Delaware, most of Virginia and northeastern North Carolina: Scattered severe thunderstorms are possible Thursday. The greatest risk of severe weather will be across central and southern Ohio, much of West Virginia, southern Pennsylvania, Maryland, the District of Columbia, most of Delaware and eastern Virginia. I-57, I-64, I-65, I-66, I-68, I-69, I-70, I-71, I-74, I-75, I-76, I-77, I-78, I-79, I-80, I-81, I-83, I-85, I-90, I-94, I-95, I-96, I-97, I-99 potentially impacted.

— Central and eastern New York: Flash flooding is possible Wednesday into Thursday morning as training thunderstorms produce rainfall rates of 1 to 2 inches per hour and totals up to 3 inches. Roads, urban areas and low crossings may flood. I-81, I-86, I-87, I-88, I-90, US-4, US-7, US-11, US-20, NY-17 potentially impacted.

Tropical Weather Outlook for the next 7 days:

— Tropical Storm Edouard is 65 miles south-southeast of Cameron, Louisiana, with sustained winds of 40 mph. It may strengthen to 65 mph before reaching the Louisiana-Texas border later today, then weaken quickly over eastern Texas tonight. Rainfall of 3 to 6 inches, with totals up to 9 inches, may cause flash flooding from the Upper Texas Coast into east-central Texas, while far southwest Louisiana may receive 2 to 4 inches; storm surge could raise water 3 to 5 feet above ground from High Island, Texas, to the Vermilion-Cameron Parish line, Louisiana.

— Hurricane Karina is not currently expected to disrupt road travel in the continental United States. However, life-threatening surf and rip currents may reach southern California through midweek.

— Tropical Storm Marie is 470 miles southwest of Manzanillo, Mexico, with sustained winds of 45 mph. It is forecast to become a hurricane and peak near 90 mph in about three days while moving northwest, then gradually turn west-northwest and weaken late in the five-day period.

Extended Hazard Outlook

Outlook Thursday September 3rd through Monday September 7th:

— Thursday, September 3 through Monday, September 7: Southern Plains and Lower Mississippi Valley: Hazardous heat may create challenging conditions. Major highways potentially affected include I-10, I-20, I-30, I-35, I-40, I-55.

— Thursday, September 3: Central Plains through the Midwest and Ohio Valley: Hazardous heat may create 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.

— Thursday, September 3 through Friday, September 4: Tennessee Valley and Southeast into the Mid-Atlantic: Hazardous heat may create challenging conditions, with much of Virginia into Maryland and Washington, D.C., mainly affected Thursday. Major highways potentially affected include I-20, I-40, I-64, I-65, I-70, I-74, I-75, I-85, I-87, I-95.

— Thursday, September 3 through Friday, September 4: Eastern Ohio and the central Appalachians through the Mid-Atlantic: Severe weather may create rapidly changing and hazardous travel conditions. Major highways potentially affected include I-64, I-70, I-76, I-79, I-81, I-85, I-95.

— Friday, September 4 through Sunday, September 6: Southeastern California and the Southwest: Heavy rain may create localized flooding and difficult travel. Major highways potentially affected include I-8, I-10, I-15, I-40, I-70.

Extended Outlook September 8th through 14th:

— Tuesday, September 8 through Saturday, September 12: California and the interior West: Heavy precipitation may develop, creating localized flooding and difficult travel. Major highways potentially affected include I-5, I-8, I-10, I-15, I-25, I-40, I-70, I-80, I-84.

— Tuesday, September 8 through Monday, September 14: From southeastern California and the Southwest across the central and southern Plains, Midwest, Lower Mississippi Valley, Southeast, Ohio Valley, and central Appalachians: Extreme heat may develop, creating challenging conditions. Major highways potentially affected include I-8, I-10, 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-79, I-80, I-81, I-85, I-95.

Confidence in the Extended Outlook:

Confidence is generally average for the earlier period, with good agreement on the large-scale pattern. Confidence decreases to much below average later, as weak pattern signals and model uncertainty limit predictability.

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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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