Travel Weather Alert: Floods and Storms Impacting Routes

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

Tropical Gulf Disturbance Brings Life-Threatening Flood Risk to Texas, Louisiana, Mississippi, Alabama and the Florida Panhandle
Major Severe Thunderstorm Outbreak Expected Wednesday from the Midwest into the Ohio Valley
Stong Winds Create Difficult Travel Across the Interior West and Northern Rockies

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Significant travel weather for the next 2-3 days.

NEW: Extended forecast for the next 2 weeks now included!

Weather Impacts Pacific

— Central and eastern Washington into north-central Oregon: Red Flag Warnings and Wind Advisories late this morning through late tonight, with west winds 20 to 35 mph and gusts up to 45 to 55 mph creating difficult travel for high-profile vehicles in the Kittitas Valley, Columbia Basin, Palouse, Spokane area, Waterville Plateau, Wenatchee area, and nearby Cascade foothill corridors. I-82, I-84, I-90, US-2, US-12, US-97, US-395 impacted.

— Northern California interior foothills and valleys: Extreme Heat Warning through late tonight, including western Shasta County, the Shasta Lake area, Redding Metro, northern Sacramento Valley in Tehama County, and Butte County below 1000 feet, with temperatures up to 110 and overnight lows in the 70s creating dangerous prolonged heat exposure. I-5 impacted.

— Parts of northern and central California and adjacent southern Oregon, west-central Nevada: Heat Advisories continue through late tonight for the northern California interior valleys, the San Joaquin Valley, and the western Nevada Basin and Range including Pyramid Lake, with temperatures up to 103 deg F.

— Central and southern California coast and Bay Area shoreline: Coastal Flood Advisory areas continue through Thursday morning for the San Francisco Bay shoreline, North Bay valleys, coastal North Bay, San Francisco Peninsula Coast, Monterey Bay, Big Sur Coast, Malibu Coast, Los Angeles County beaches, and Northern Coastal Humboldt, with minor coastal flooding, up to 2 feet of inundation in some low-lying shoreline and tidal-waterway areas.

Weather Impacts Mountain:

— Parts of Idaho, western and southwest Montana: Wind Advisory conditions midday today through late evening, and in the Bitterroot/Sapphire Mountains and Butte/Blackfoot Region through Wednesday morning, with winds 15 to 35 mph and gusts commonly 45 to 50 mph, locally near 55 to 60 mph near exposed terrain and MacDonald Pass. I-15, I-84, I-86, I-90, US-12, US-20, US-26, US-93 impacted.

— Southern Idaho, eastern Wyoming and adjacent Nebraska Panhandle, southern and eastern Utah, western and south-central Colorado, and northwest New Mexico: Red Flag Warning conditions today and Wednesday. Wind gusts 30 to 45 mph. I-15, I-25, I-70, I-80, I-84, I-86, I-90, US-20, US-24, US-26, US-40, US-50, US-64, US-85, US-89, US-93 impacted.

— Northern and central Montana: High Wind Warning around midday today through Wednesday morning for the East Glacier Park Region, Northern High Plains, Rocky Mountain Front, Judith Basin County, Judith Gap, and the Big Belt, Bridger, Castle Mountains, and near MacDonald Pass with winds 25 to 40 mph and gusts up to 60 to 65 mph. I-15, I-90, US-2, US-12, US-87, US-89, US-191 impacted.

— Northeastern Montana: A few strong to severe thunderstorms are possible today and tonight, with isolated severe wind or hail possible. I-94, US-2, US-12, US-191 potentially impacted.

— Southeast Wyoming: High Wind Warning early this evening through Wednesday afternoon for the North Snowy Range Foothills, South Laramie Range, South Laramie Range Foothills, and Central Laramie Range, with winds 30 to 40 mph and gusts up to 60 to 65 mph. This includes Arlington, Elk Mountain, and the I-80 Summit between Cheyenne and Laramie. I-25, I-80, US-30, US-85, US-287 impacted.

— Southeast Colorado lower elevations: Heat Advisory Wednesday morning through Wednesday evening below 7500 feet, including the Canon City, Colorado Springs, Pueblo, Monument Ridge, and Rampart Range lower-elevation areas. Temperatures as high as 105 deg F.

— Grand Canyon Country: Extreme Heat Warning late this morning through Wednesday evening for elevations below 4000 feet, including canyon areas and Havasupai Gardens or Bright Angel campgrounds. Temperatures may reach 110 deg at Phantom Ranch. US-180 impacted.

— Southeast New Mexico Chaves County Plains, including the Roswell area: Extreme Heat Watch midday Wednesday through Wednesday evening, with temperatures up to 111 deg F. US-70, US-285, US-380 potentially impacted.

Weather Impacts Central:

— Texas Coast: A broad area of low pressure located inland over south Texas is producing a large area of disorganized showers and thunderstorms. The system is forecast to move northeastward along the Texas coast and could emerge over the northwestern Gulf later today or tonight. This system may become a short-lived tropical storm late today or on Wednesday.
Regardless of tropical cyclone formation, interests across southern and eastern Texas and portions of Louisiana and Mississippi should prepare for periods of intense rainfall over the next several days which could produce widespread, life-threatening flash, urban, and river flooding. Gusty winds and coastal flooding are also possible along portions of the northwestern Gulf Coast, and Tropical Storm Watches or Warnings could be required later today.

— South Texas, southeast Texas, southern Louisiana, southern Mississippi, much of Alabama, and the Florida Panhandle: Flood Watches and and Advisories associated with a developing tropical disturbance bring a high risk of dangerous flash flooding today through Friday, with repeated heavy rain, rainfall rates of 2 to 4 inches per hour in parts of Texas, storm totals of 3 to 6 inches across portions of Louisiana and Mississippi, and 6 to 8 inches or more along parts of the Texas coast. The greatest flash-flood risk will be across southern Mississippi, parts of Louisiana, and southeastern Texas. I-2, I-10, I-12, I-20, I-22, I-35, I-37, I-45, I-49, I-55, I-59, I-65, I-69, I-69C, I-69E, I-85 impacted.

— Southern Minnesota, southern Wisconsin, much of Iowa, Illinois, most of Missouri, eastern Kansas and adjacent northern Oklahoma: An outbreak of severe thunderstorms is expected Wednesday, with damaging winds, large hail, and tornadoes. Some storms will likely contain intense tornadoes, wind gusts to 80 mph, and hail over 2 inches in diameter. The greatest risk of severe weather will be across central and northern Illinois. I-24, I-29, I-35, I-35E, I-35W, I-39, I-41, I-43, I-44, I-49, 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.

— Western North Dakota and north-central South Dakota: A few strong to severe thunderstorms are possible today and tonight, with isolated severe wind or hail possible. I-94, US-2, US-12, US-52, US-83, US-85, US-212 potentially impacted.

— Western Nebraska Panhandle: Red Flag Warning beginning around midday through late evening for the Eastern Panhandle and Crescent Lake National Wildlife Refuge area, with gusts up to 30 to 50 mph and rapid fire-spread potential. I-76, I-80, US-20, US-26, US-30, US-385 impacted.

— Southeastern Kansas, northeast Oklahoma, southwest Missouri, northwest Arkansas: A few strong to severe thunderstorms are possible and tonight, with isolated severe wind or hail possible. I-35, I-44, I-49, US-54, US-59, US-60, US-62, US-63, US-64, US-65, US-69, US-71, US-75, US-77, US-400, US-412 potentially impacted.

— Southeastern Kansas through parts of Missouri, eastern Iowa, south-central and southeast Wisconsin, and Illinois: Flash flooding is possible Wednesday where repeated heavy rain overlaps saturated or poor-drainage areas. I-39, I-41, I-43, I-44, I-49, I-55, I-57, I-64, I-70, I-72, I-74, I-80, I-88, I-90, I-94 potentially impacted.

— Central and eastern Oklahoma, eastern Texas, Arkansas, southern Missouri, Louisiana, Mississippi, Kentucky, Tennessee, Alabama, and the western Florida Panhandle: Flash flooding is expected Thursday as tropical moisture spreads across the lower Mississippi Valley and into central Alabama. The greatest flash-flood risk will be across central and southern Alabama, central and southern Mississippi, and central and northern Louisiana. I-10, I-12, I-20, I-22, I-24, I-30, I-35, I-40, I-44, I-45, I-49, I-55, I-57, I-59, I-64, I-65, I-69, I-75, I-85 potentially impacted.

— Northwest Texas, much of Oklahoma, southern Missouri and southern Illinois, Kentucky, Tennessee, Arkansas, Louisiana, Mississippi, Alabama: Scattered severe thunderstorms are possible Thursday, with damaging wind the primary hazard in stronger storms. The greatest risk of severe weather will be across western Kentucky and northern Tennessee. I-10, I-12, I-20, I-22, I-24, I-27, I-30, I-35, I-40, I-44, I-49, I-55, I-57, I-59, I-64, I-65, I-69, I-75, I-85 potentially impacted.

— Central Texas: Dense Fog Advisory through late morning, with visibility near one-quarter mile from Erath and Hood counties south and east through Bell, McLennan, Falls, and Limestone counties. I-14, I-20, I-35, US-67, US-77, US-84, US-190, US-281 impacted.

— South Texas Duval County: FLASH FLOOD WARNING this morning, with 2 to 3 inches of rain already fallen and another 1 to 2 inches possible, creating a risk of high water in low spots and rapidly changing road conditions. US-59 impacted.

— Southeast Texas Coast, southern Louisiana, coastal Mississippi: A few severe thunderstorms are possible Wednesday, associated with the tropical disturbance. Primary hazard is isolated damaging wind gusts. I-10, I-12, I-49, I-55, I-59, US-61, US-71, US-90, US-165, US-167, US-171, US-190, US-287 potentially impacted.

— Southeastern Texas, central and southern Louisiana and Mississippi, southwestern Alabama into the western Florida Panhandle: Flash flooding is possible Wednesday as a Gulf disturbance tracks near the coast, with a potent band of heavy rain possible where the circulation focuses moisture. The greatest flash-flood risk will be across southwestern Louisiana. I-10, I-12, I-20, I-45, I-49, I-55, I-59, I-65, I-69 potentially impacted.

— Parts of northern and eastern Iowa and parts of central and northern Illinois: A few strong to severe thunderstorms are possible today and tonight, with isolated damaging winds, hail, and a marginal tornado risk. I-35, I-39, I-41, I-55, I-57, I-70, I-72, I-74, I-80, I-88, I-90, I-94 potentially impacted.

— Southern Louisiana, southern Mississippi, southern Alabama, and the Florida Panhandle: A few strong to severe thunderstorms are possible today and tonight, with isolated damaging winds and a marginal tornado risk in stronger storms. I-10, I-12, I-49, I-55, I-59, I-65 potentially impacted.

— Louisiana and east Texas river and parish flood areas: Flood Warning and Flood Advisory conditions continue through late this evening for St. Tammany Parish, Calcasieu Parish, and nearby Texas-Louisiana river areas, with 1 to 3 inches already fallen in St. Tammany Parish and another 1 to 2 inches expected. I-10, I-12, I-59, US-90, US-171, US-190 impacted.

Weather Impacts Eastern:

— Southern Michigan, much of Indiana, and central and northwestern Ohio: A few strong to severe thunderstorms are possible today and tonight, with isolated damaging wind gusts, hail, and a marginal tornado risk in stronger storms. I-57, I-65, I-69, I-70, I-74, I-75, I-80, I-90, I-94, I-96 potentially impacted.

— Southern Michigan Lower Peninsula, Ohio, Indiana, parts of eastern Kentucky, western West Virginia, and western Pennsylvania fringe: An outbreak of severe thunderstorms is expected Wednesday, with damaging winds, large hail, and tornadoes. Some storms will likely contain intense tornadoes, wind gusts to 80 mph, and hail over 2 inches in diameter. The greatest risk of severe weather will be across northwestern Indiana. I-57, I-64, I-65, I-68, I-69, I-70, I-71, I-74, I-75, I-76, I-77, I-79, I-80, I-90, I-94, I-96 potentially impacted.

— Southern Michigan, Indiana Ohio, northern Kentucky, northwestern West Virginia, and western Pennsylvania: Flash flooding is possible Wednesday where heavy rain overlaps repeated thunderstorm development and vulnerable drainage areas. I-57, I-64, I-65, I-69, I-70, I-71, I-74, I-75, I-76, I-77, I-79, I-80, I-86, I-90, I-94, I-96 potentially impacted.

— Much of New England, most of New York, Pennsylvania, New Jersey, the Mid-Atlantic Region, Upstate South Carolina, and most of Georgia: Scattered severe thunderstorms are possible Thursday, with damaging wind gusts the primary hazard. I-10, I-16, I-20, I-24, I-26, I-40, I-59, 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-88, I-89, I-90, I-91, I-93, I-95, I-97, I-99 potentially impacted.

— Kentucky, Tennessee, West Virginia, southwest Virginia, western North Carolina, western South Carolina, and much of Georgia: Flash flooding is likely Thursday as tropical moisture lifts farther inland and repeated heavy rain develops across the southern Appalachians and adjacent valleys. I-16, I-20, I-24, I-26, I-40, I-59, I-64, I-65, I-68, I-71, I-75, I-77, I-79, I-81, I-85 potentially impacted.

— Central and western Georgia and the Florida Peninsula: Flash flooding is possible today and tonight as deeper tropical moisture supports repeated heavy rain showers and thunderstorms. I-10, I-16, I-20, I-75, I-85, US-19, US-23, US-27, US-29, US-41, US-78, US-80, US-82, US-84, US-98, US-278, US-280, US-431 potentially impacted.

— Southern Georgia and northern Florida Peninsula: A few strong to severe thunderstorms are possible today and tonight, with isolated damaging wind gusts and a marginal tornado risk in stronger storms. I-10, I-16, I-75, I-95, US-1, US-17, US-19, US-23, US-25, US-27, US-41, US-84, US-98, US-280, US-301, US-431 potentially impacted.

— Metro Broward, Metropolitan Miami-Dade, Coastal Broward, and Coastal Miami-Dade: Heat Advisory beginning around midday through early evening, with heat index values up to 105.

Outlook Thursday June 18th through Monday June 22nd:

— Thursday, June 18: much of central and southern Texas: Heat concerns may create challenging travel conditions. Major highways potentially affected include I-10, I-20, I-35.

— Thursday, June 18: small portions of southeastern Georgia, eastern South Carolina, central and eastern North Carolina, southeastern Virginia, and portions of the southern DELMARVA Peninsula: Heat concerns may create challenging travel conditions. Major highways potentially affected include I-20, I-40, I-64, I-74, I-85, I-87, I-95.

— Thursday, June 18 through Monday, June 22: most of the Florida Peninsula and portions of southeastern Georgia: Heat concerns may create challenging travel conditions. Major highways potentially affected include I-4, I-10, I-75, I-95.

— Saturday, June 20 through Sunday, June 21: southeastern Nebraska, north-central and eastern Kansas, southern Iowa, most of Missouri, and parts of Illinois: Heavy rain may create localized flooding and reduced visibility. Major highways potentially affected include I-29, I-35, I-55, I-64, I-70, I-80.

— Monday, June 22: central and eastern Oklahoma, northern Arkansas and adjacent southern Missouri: Heavy rain may create localized flooding and reduced visibility. Major highways potentially affected include I-35, I-40, I-55.

Extended Outlook June 23rd through 29th:

— Tuesday, June 23 through Monday, June 29: much of Washington, Oregon, and western Idaho: Heat concerns may develop, which could create challenging travel conditions, especially for long drives and exposed routes. Major highways potentially affected include I-84, I-90.

— Tuesday, June 23 through Monday, June 29: Interior and southeastern California, the Desert Southwest, southern New Mexico, and much of Texas: Heat concerns may develop, which could create challenging travel conditions, especially for long drives and exposed routes. Major highways potentially affected include I-5, I-8, I-10, I-15, I-20, I-25, I-30, I-35, I-40, I-80.

— Tuesday, June 23 through Wednesday, June 24: from eastern Oklahoma and northeastern Texas through the Mid-South and Tennessee Valley into parts of the southern Appalachians: Heavy rain may develop, which could create localized flooding and reduced visibility. Major highways potentially affected include I-20, I-30, I-35, I-40, I-55, I-64, I-65, I-71, I-75, I-81.

— Tuesday, June 23 through Monday, June 29: southern Alabama, southern Georgia and Florida: Heat concerns may develop, which could create challenging travel conditions, especially for long drives and exposed routes. Major highways potentially affected include I-4, I-10, I-65, I-75, I-95.

Forecast Confidence for the Extended Outlook:

Confidence is average for the earlier period, with generally good large-scale agreement but some uncertainty tied to the track of a low moving inland later this week. Confidence decreases to below average later in the outlook as uncertainty increases east of the Rockies, especially regarding the precipitation pattern.

Looking for real-time road conditions? Here’s a link, courtesy of the Federal Highway Administration, to all the individual State 511 websites.

Your route’s weather may vary from the general forecast — check your exact trip

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