Planning to travel this week? Here’s what could impact your route.
- –Southwest flash flooding: Heavy rain and ongoing Flood Watches cover a broad area from Arizona and Utah through Colorado and New Mexico today, with parts of the region remaining at risk into Friday. Flash flooding may affect washes, slot canyons, burn scars, low roads, and crossings.
- –Indiana and Ohio flooding: A Flash Flood Warning remains in effect in northeastern Indiana, while Flood Watches cover northern and central Indiana and parts of Ohio. Several inches of rain have already fallen in some areas, with additional heavy rain possible today.
- –Heat continues from the southern Plains into the Mississippi, Tennessee and lower Ohio valleys: Heat Advisories cover a broad region from Kansas and Oklahoma through Missouri, Arkansas, Mississippi, Tennessee, Alabama, Illinois, Indiana and Kentucky, with heat-index values up to 109 degrees.
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Significant travel weather for the next 2-3 days.
Weather Impacts Pacific:
— Central Nevada: A Red Flag Warning is in effect today. Southerly winds of 20 to 25 mph, with gusts of 30 to 35 mph and very low humidity, will support rapid fire spread. US-6, US-50 and US-95 may be affected.
Weather Impacts Mountain:
— South-central and southeastern Idaho and north-central and northeastern Utah: Isolated severe thunderstorms with strong wind gusts and hail are possible late this afternoon and early this evening. I-15, I-80, I-84, I-86, US-6, US-20, US-26, US-30, US-40, US-89, US-93 and US-189 may be affected.
— Far southwestern Montana, southeastern Idaho, far western Wyoming, and north-central and northwestern Utah: Isolated severe thunderstorms with hail are possible Friday afternoon and evening. I-15, I-80, I-84, I-86, I-90, US-6, US-20, US-26, US-30, US-40, US-89, US-93, US-189, US-191 and US-287 may be affected.
— Eastern Wyoming: A Slight Risk of excessive rainfall continues today into early Friday. Heavy thunderstorms may produce flash flooding of low roads and crossings. I-25, I-80, I-90, US-14, US-16, US-18, US-20, US-26, US-30, US-85 and US-287 may be affected.
— Southeastern Wyoming and northeastern Colorado: Isolated severe thunderstorms with strong wind gusts are possible late this afternoon and early this evening. I-76, I-80, US-6, US-26, US-30, US-34, US-85 and US-385 may be affected.
— Far southeastern Wyoming and central and northeastern Colorado: Isolated severe thunderstorms are possible Saturday afternoon and evening. I-25, I-70, I-76, I-80, US-18, US-20, US-24, US-26, US-30, US-34, US-36, US-40, US-50, US-85, US-285, US-287 and US-385 may be affected.
— Central and southern Utah, western Colorado, much of Arizona and much of New Mexico: A broad area of heavy rain and ongoing Flood Watches will continue today, with parts of the region remaining at risk into Friday. Flash flooding may affect slot canyons, dry washes, burn scars, low roads and crossings. I-8, I-10, I-15, I-17, I-19, I-25, I-40 and I-70 may be affected.
— Central and northern Arizona and southern, central and southeastern Utah, including Grand Canyon Country, Zion, Bryce Canyon, Capitol Reef, Lake Powell and the San Rafael Swell: Flood Watches continue today. Repeated heavy thunderstorms over saturated ground may produce flash flooding in washes, creeks, slot canyons, burn scars and other low areas. I-15, I-17, I-40, I-70, US-6, US-40, US-50, US-60, US-70, US-89, US-89A, US-93, US-160, US-163, US-180 and US-191 may be affected.
— Southwestern and south-central Colorado, including the San Juan Mountains, Four Corners, Upper Dolores River area, Animas and San Juan river basins and Upper Rio Grande Valley: Flood Watches continue through this evening. Repeated heavy thunderstorms over saturated ground may cause flash flooding along rivers, creeks, burn scars and low areas. US-84, US-160, US-491 and US-550 may be affected.
— Southeastern Colorado: Isolated severe thunderstorms with strong wind gusts are possible Friday afternoon and evening. US-40, US-50, US-56, US-160, US-287, US-385 and US-400 may be affected.
— Western, central, northern and south-central New Mexico, including Santa Fe: Flood Watches and a Flood Advisory continue today. Rainfall rates may reach 1 to 2 inches per hour in stronger storms, with flash flooding possible in arroyos, urban areas and low-water crossings. I-10, I-25, I-40, US-60, US-64, US-70, US-82 and US-84 may be affected.
— Southeastern New Mexico: Isolated severe thunderstorms are possible Saturday afternoon and evening. US-60, US-62, US-70, US-82, US-84, US-285 and US-380 may be affected.
Weather Impacts Central:
— Most of North Dakota and west-central and northwestern Minnesota: Dense Fog Advisories continue through mid-morning. Visibility may fall below one-quarter mile in central and western North Dakota and below one-half mile farther east into Minnesota. I-29, I-94, US-2, US-10, US-12, US-52, US-59, US-71, US-83, US-85 and US-281 may be affected.
— Central, north-central and northeastern South Dakota and central and north-central Minnesota: Dense Fog Advisories remain in effect this morning, with visibility one-quarter mile or less in some areas. US-2, US-12, US-14, US-53, US-71, US-83, US-169 and US-212 may be affected.
— Most of South Dakota, northwestern Nebraska, southwestern Minnesota and far northwestern Iowa: A Slight Risk of excessive rainfall continues today into early Friday. Rainfall rates may exceed 2 inches per hour in stronger storms, with totals of 2 to 4 inches or locally more. Flash flooding may make low roads and crossings difficult or impassable. I-29, I-35, I-80, I-90, I-94 and numerous US highways may be affected.
— West-central, central and southern Nebraska and north-central and northeastern Kansas: Dense Fog Advisories continue this morning, with visibility one-quarter mile or less across parts of the region. I-70, I-76, I-80, US-6, US-26, US-30, US-34, US-36, US-77, US-83, US-136, US-281 and US-385 may be affected.
— Eastern Nebraska, most of Iowa, northwestern Missouri, and central and northern Illinois: Dense Fog Advisories continue this morning. Visibility may fall to one-quarter mile or less, with localized near-zero visibility and rapid changes over short distances. I-29, I-35, I-39, I-55, I-57, I-72, I-74 and I-80 may be affected.
— Western Nebraska: Isolated severe thunderstorms with strong wind gusts are possible late this afternoon and early this evening. I-76, I-80, US-6, US-18, US-20, US-26, US-30, US-34, US-83, US-85 and US-385 may be affected.
— Eastern Nebraska, southern Iowa and far northwestern Missouri: Isolated severe thunderstorms with strong wind gusts are possible Friday afternoon and evening. I-29, I-35, I-80, US-6, US-20, US-30, US-34, US-63, US-65, US-69, US-71, US-77 and US-136 may be affected.
— Central and northwestern Nebraska, including the Nebraska Panhandle: Isolated severe thunderstorms are possible Saturday afternoon and evening. I-76, I-80, US-20, US-26, US-30, US-85 and US-385 may be affected.
— Western Kansas: Isolated severe thunderstorms with strong wind gusts are possible Friday afternoon and evening. I-70, US-40, US-50, US-56, US-83, US-160, US-283 and US-400 may be affected.
— Parts of Kansas, northern Oklahoma, north-central and northwestern Texas, southern Iowa, northern Missouri, and central and northern Illinois: Isolated severe thunderstorms are possible Saturday afternoon and evening. I-27, I-29, I-35, I-39, I-40, I-49, I-55, I-57, I-70, I-72, I-74, I-80, I-88, I-90 and I-94 may be affected.
— Southeastern Kansas and central and southern Missouri: Heat Advisories continue into the weekend, with heat-index values generally around 100 to 105 degrees and overnight lows remaining in the 70s.
— Eastern and southern Oklahoma and much of Arkansas: Heat Advisories are in effect today, with heat-index values locally reaching 107 to 109 degrees.
— Southern Minnesota, southern Wisconsin and northern Iowa: A Slight Risk of excessive rainfall is forecast Friday. Heavy rain from late morning into the evening may produce flash flooding of low roads and urban areas. I-29, I-35, I-35E, I-35W, I-39, I-41, I-43, I-90 and I-94 may be affected.
— South-central and southeastern Wisconsin, eastern Iowa and northern Illinois: Heavy rain Saturday may produce scattered flash flooding, with 2 to 4 inches possible in some areas. I-39, I-41, I-43, I-55, I-57, I-74, I-80, I-88, I-90 and I-94 may be affected.
— Much of Iowa and northern Illinois: Flood Watches continue this morning. Saturated ground and additional heavy rain may cause urban and low-road flooding, particularly in central and eastern Iowa and northwestern Illinois. I-35, I-39, I-55, I-57, I-72, I-74, I-80, I-88, I-90 and I-94 may be affected.
— Central and eastern Missouri, Illinois, southwestern Indiana, western and south-central Kentucky, western and Middle Tennessee, northern Mississippi and northern Alabama: Heat Advisories continue through the weekend. Heat-index values may reach 105 to 109 degrees, making daytime travel and outdoor stops more difficult.
Weather Impacts East:
— Northeastern Indiana around Bluffton, Huntington and Decatur: A FLASH FLOOD WARNING continues until 7:45 AM EDT. Several inches of rain have fallen on saturated ground, and additional rain is possible. Flash flooding is affecting or threatening small streams, urban areas, highways, streets and underpasses. I-69, US-24 and US-27 may be affected.
— Southern portions of Michigan’s Lower Peninsula, northern Indiana and northwestern Ohio: Heavy rain Saturday may produce scattered flash flooding, especially in urban areas and along low roads. I-57, I-65, I-69, I-71, I-75, I-80, I-90, I-94 and I-96 may be affected.
— Northern and central Indiana and northwestern, west-central and central Ohio: Flood Watches continue today. Parts of northern Indiana and northwestern Ohio have already received 1 to 5 inches of rain, with another 1 to 2 inches or more possible. Narrow bands of 1 to 3 inches may also affect central and east-central Indiana. I-65, I-69, I-70, I-71, I-74, I-75, I-76, I-80, I-90 and I-94 may be affected.
— Northwestern Indiana: Isolated severe thunderstorms are possible Saturday afternoon and evening. I-65, I-74, I-80, I-90, I-94, US-24, US-30, US-31 and US-421 may be affected.
— Southern Indiana, southern and southeastern Ohio, much of Kentucky and western West Virginia: Humid heat today will bring temperatures into the upper 80s to mid-90s, with heat-index values generally in the mid-90s to around 100 degrees. I-64, I-71, I-74, I-75, I-77 and I-79 may be affected.
— Far south-central and southwestern North Carolina, northern South Carolina and northern Georgia: Isolated severe thunderstorms with strong wind gusts are possible Friday afternoon and evening. I-20, I-26, I-75, I-77, I-85 and numerous US highways may be affected.
— West-central Florida near Dunnellon: A Flood Warning remains in effect along the Withlacoochee River. Minor flooding is affecting docks and boat ramps near US-41.
Tropical Weather Outlook for the next 7 days:
— The Central Subtropical Atlantic disturbance east of Bermuda has some potential for tropical development as it moves slowly westward and then possibly turns south. It is not currently expected to threaten travel in the continental United States.
Extended Hazard Outlook
Outlook Saturday September 19th through Wednesday September 23rd:
— Saturday, September 19: Most of Montana and northeastern Wyoming: Heavy rain may create localized flooding and reduced visibility. Major highways potentially affected include I-15, I-90, I-94.
— Saturday, September 19: Southern Plains through the lower and mid-Mississippi Valley, centered on Oklahoma, Missouri, and Arkansas: Hazardous heat may create challenging conditions. Major highways potentially affected include I-20, I-30, I-35, I-40, I-55, I-64, I-70.
— Saturday, September 19 through Monday, September 21: Lower and mid-Mississippi Valley through Kentucky, Tennessee, and Alabama: Hazardous heat may create challenging conditions. Major highways potentially affected include I-20, I-30, I-40, I-55, I-64, I-65.
— Tuesday, September 22 through Wednesday, September 23: Southeastern Arizona, most of New Mexico, and western Texas: Heavy rain may create localized flooding and reduced visibility. Major highways potentially affected include I-10, I-25, I-40.
Extended Outlook September 24th through 30th:
— Thursday, September 24 through Friday, September 25: Southwest and southern Rockies into the southern High Plains: Heavy precipitation may develop across much of Utah, Arizona, Colorado, New Mexico, Texas, southwestern Kansas, and northwestern Oklahoma, creating localized flooding and difficult travel. Major highways potentially affected include I-8, I-10, I-15, I-20, I-25, I-40, I-70.
— Thursday, September 24 through Monday, September 28: Southeast through the Mid-Atlantic: Heavy precipitation may develop from southern Alabama and Florida through Georgia, the Carolinas, Virginia, and much of the central Mid-Atlantic, creating localized flooding and difficult travel. Major highways potentially affected include I-4, I-10, I-20, I-40, I-64, I-65, I-70, I-74, I-75, I-81, I-85, I-87, I-95.
Confidence in the Extended Outlook:
Confidence is average for the earlier period, with generally good large-scale agreement but some uncertainty in the western U.S. pattern and along the East Coast. Confidence decreases later in the outlook because of increasing uncertainty in the North Pacific pattern and its downstream effects, along with varying signals across eastern and western parts of the country.
Looking for real-time road conditions? Here’s a link, courtesy of the Federal Highway Administration, to all the individual State 511 websites.
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