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

• Persistent extreme heat grips Nevada, interior and Southern California, and Arizona throughout the weekend and into early next week, with temperatures reaching 118 to 120 degrees in the hottest deserts.
• Flash flooding threatens east-central Missouri this morning, while broader flooding along the I-70 corridor from eastern Kansas through Missouri and western Illinois may cover urban roads and low crossings.
• Severe thunderstorms may bring damaging winds and hail along the I-44 corridor in northeastern Oklahoma and southwest Missouri this afternoon and evening.

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:

— Western Washington and northwestern and west-central Oregon: Heat Advisories today, with temperatures up to 95 degrees.

— Southern and eastern Oregon, southwestern Idaho, and northern California: Heat Advisories continue today and Friday, with parts of eastern Oregon and southwestern Idaho affected through Saturday. Temperatures may reach 115 degrees in the hottest northern California valleys.

— Parts of southwest Oregon and northwest California: A Red Flag Warning today, with wind gusts up to 25 mph supporting rapid fire spread. I-5, US-199, CA-3, CA-96 impacted.

— Nevada, interior Central and Southern California, and northwestern Arizona: Extreme Heat Warnings and Heat Advisories continue through Sunday, with some western Nevada alerts lasting into Monday. Temperatures may reach 120 degrees around the Mojave Desert and Death Valley National Park and 118 degrees in the Imperial Valley. I-8, I-10, I-11, I-15, I-40, I-80 impacted.

Weather Impacts Mountain:

— Much of Eastern Montana and central and southern Wyoming: Red Flag Warnings today, with wind gusts up to 35 mph supporting rapid fire spread. I-25, I-80, I-90, I-94, US-12, US-16, US-18, US-20, US-26 impacted.

— Much of Utah, including Zion and Capitol Reef National Parks: Extreme Heat Warnings and Heat Advisories continue through Saturday in southern Utah and Friday through Monday farther north, with temperatures near or above 110 degrees in Lower Washington County, Glen Canyon, and Zion. I-15, I-70, I-80, I-84, US-6, US-50, US-89, US-191 impacted.

— Parts of southwest Colorado: Red Flag Warnings today, with wind gusts up to 30 mph supporting rapid fire spread. US-24, US-50, US-160, US-285, US-550 impacted.

— South-central, southwest, and parts of northern Arizona, including Phoenix and Grand Canyon National Park: Extreme Heat Warnings continue through Sunday, with temperatures up to 116 degrees around southwest Arizona; lower elevations of Grand Canyon National Park below 4,000 feet may reach 111 degrees through Friday. I-8, I-10, I-17, US-60, US-89A, US-180 impacted.

— Southeastern Arizona: Flood Advisories continue through early this morning after 1 to nearly 3inches of rain, with up to a quarter of an inch additional rainfall possible. Minor flooding and swift water may make low-water crossings impassable. I-10, US-191 impacted.

— Parts of central and northwestern New Mexico, including Albuquerque: A Heat Advisory today, with temperatures up to 103 degrees.

Weather Impacts Central:

— East-central Missouri: A FLASH FLOOD WARNING this morning in Montgomery and Warren counties, where rainfall rates of 1 to 3 inches in 90 minutes may flood highways, streets, underpasses, small streams, and low-lying areas. I-70 impacted and surrounding secondary highways may be impacted.

— Western North Dakota and northwestern South Dakota: Red Flag Warnings today, with wind gusts up to 40 mph supporting rapid fire spread. I-94, US-2, US-12, US-18, US-85, US-212 impacted.

— South-central South Dakota and north-central and northwestern Nebraska: Isolated severe thunderstorms with damaging wind and hail are possible today. I-90, US-18, US-20, US-30, US-83 potentially impacted.

— Much of Nebraska, north-central and northwestern Kansas, northern and western Iowa, and central and northeastern Wisconsin: Dense Fog Advisories this morning, with visibility of one-quarter mile or less. I-29, I-35, I-39, I-41, I-43, I-70, I-80, I-90, I-94 impacted.

— Central and eastern Nebraska, central and southern Iowa, northern Missouri, and west-central Illinois: Isolated severe storms may organize into a system with a corridor of damaging winds Saturday afternoon and evening, though the exact placement remains uncertain. I-29, I-35, I-72, I-80, US-6, US-20, US-30, US-34, US-36, US-63, US-65, US-69, US-71, US-77, US-83, US-136, US-281 potentially impacted.

— South-central and southeast Kansas, northeastern Oklahoma, southern Missouri, and northern Arkansas: Scattered severe thunderstorms with damaging wind and hail are possible this afternoon and evening. The greatest risk of severe weather will be across southeastern Kansas, northeastern Oklahoma, and south-central and southwestern Missouri. I-35, I-44, I-49, US-50, US-54, US-56, US-59, US-60, US-62, US-63, US-64, US-65, US-67, US-69, US-71, US-75, US-77, US-183, US-400, US-412 potentially impacted.

— Much of central and eastern Oklahoma, and adjacent northwestern Arkansas along the I-40 corridor: Heat Advisories today, with heat index values up to 109 degrees.

— Far-west Texas: A Heat Advisory today, with temperatures up to 104 degrees.

— South Texas: Heat index values of 105 to 110 degrees are expected today.

— South-central and southeastern Minnesota, much of Wisconsin, most of Iowa, and adjacent northern Missouri: Isolated severe thunderstorms may produce damaging wind gusts and hail Friday afternoon and evening. I-29, I-35, I-35E, I-35W, I-39, I-80, I-90, I-94 potentially impacted.

—Much of central and northern Missouri and adjacent eastern Kansas, and west-central Illinois: A combination of Flood Watches and Advisories today as heavy rain continues. Over 2 inches of rain have already fallen, and additional storms may produce localized totals of 3 to 5 inches across central Missouri, flooding urban roads, small streams, and low crossings. I-29, I-35, I-44, I-49, I-55, I-64, I-70, I-72 impacted.

Weather Impacts East:

— South-central Michigan Upper Peninsula: A Dense Fog Advisory this morning, with visibility of one-quarter mile or less. US-2, US-41 impacted.

— Western and central Michigan Upper Peninsula: Isolated severe thunderstorms with damaging wind gusts and hail are possible Friday afternoon and evening. US-2, US-8, US-41, US-45, US-51, US-141 potentially impacted.

— Central and southwestern Ohio and adjacent north-central Kentucky: Dense Fog Advisories this morning, with visibility as low as one-quarter mile and rapid changes over short distances. I-64, I-70, I-71, I-74, I-75, US-23, US-27, US-50, US-60, US-62 impacted.

— Northeastern West Virginia, southeastern Vermont, western Massachusetts, central and southern New York, northwestern New Jersey, central and eastern Pennsylvania, much of Maryland, the District of Columbia, and northern Virginia: Isolated severe thunderstorms with locally damaging wind gusts are possible this afternoon and evening. I-64, I-66, I-68, I-70, I-76, I-78, I-80, I-81, I-83, I-84, I-86, I-87, I-88, I-90, I-91, I-95, I-97, I-99 potentially impacted.

— Northeastern West Virginia, northern New Jersey, central and eastern Pennsylvania, central and western Maryland, the District of Columbia, and northern Virginia: Isolated severe thunderstorms with locally damaging wind gusts are possible Friday. I-66, I-68, I-70, I-76, I-78, I-80, I-81, I-83, I-84, I-87, I-95, I-97, I-99 potentially impacted.

— Southern New Hampshire, much of Massachusetts, Rhode Island, much of Connecticut, southeastern New York, including New York City and Long Island, most of New Jersey, eastern Pennsylvania, and northern Delaware: Heat Advisories today and Friday, with parts of New Jersey, southeastern Pennsylvania, and northern Delaware continuing through Saturday. Heat index values may reach 104 degrees around New York City and northern New Jersey.

Tropical Weather Outlook for the next 7 days:

No tropical cyclone activity is expected in the Atlantic or eastern Pacific during the next seven days.

Outlook Saturday August 8th through Wednesday August 12th:

— Saturday, August 8 through Monday, August 10: From southeastern Oregon and much of California through the Intermountain West and 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.

— Saturday, August 8 through Wednesday, August 12: From the central Rockies and adjacent High Plains through the central and southern Plains into the Mississippi and Tennessee valleys: Hazardous heat may create challenging conditions. Major highways potentially affected include I-10, I-20, I-25, I-29, I-30, I-35, I-40, I-55, I-64, I-65, I-70, I-76.

— Monday, August 10 through Wednesday, August 12: From eastern Texas and the central Gulf Coast through the Southeast and Mid-Atlantic: Hazardous heat may create challenging conditions. Major highways potentially affected include I-10, I-20, I-40, I-55, I-64, I-65, I-74, I-75, I-81, I-85, I-87, I-95.

— Monday, August 10 through Tuesday, August 11: From the Great Lakes and Ohio Valley into the central Appalachians and interior Mid-Atlantic: Heavy rain may create localized flooding and reduced visibility in the Great Lakes region on Monday and across the Ohio Valley, central Appalachians, and interior Mid-Atlantic on Tuesday. Major highways potentially affected include I-55, I-64, I-65, I-70, I-71, I-74, I-75, I-76, I-79, I-80, I-90, I-94.

Extended Outlook August 13th through August 19th:

— Thursday, August 13 through Wednesday, August 19: Across the Southwest and central and southern Rockies: Heavy precipitation may develop across southeastern California, southeastern Nevada, much of Utah, Arizona, Colorado, and New Mexico. Heavy precipitation is likely through Saturday, August 15, across most of Arizona and portions of southeastern Utah, southwestern Colorado, and northwestern New Mexico. Major highways potentially affected include I-8, I-10, I-15, I-25, I-40, I-70.

— Thursday, August 13 through Wednesday, August 19: From southeastern Colorado and eastern New Mexico through the central and southern Plains, Lower Mississippi Valley, and Southeast: Extreme heat may develop across the broad region. It is more likely through Sunday, August 16, across southeastern Kansas, most of Oklahoma and Texas, southwestern Missouri, and most of Arkansas, Louisiana, and Mississippi. Major highways potentially affected include I-4, I-10, I-20, I-30, I-35, I-40, I-55, I-64, I-65, I-70, I-74, I-75, I-85, I-87, I-95.

— Thursday, August 13 through Saturday, August 15: From Iowa and the mid-Mississippi Valley through the lower Great Lakes, Ohio Valley, and central Appalachians: Heavy precipitation may develop, creating localized flooding and difficult travel. Major highways potentially affected include I-35, I-55, I-64, I-65, I-70, I-71, I-74, I-75, I-79, I-80, I-81, I-90, I-94.

Confidence in the Extended Outlook:

Confidence is above average for the earlier period, with generally good large-scale agreement but some uncertainty in the timing and details of individual systems. Confidence decreases to average later, with moderate spread and added uncertainty in how the western pattern evolves and how far heat extends across the Southeast.

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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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