Severe weather, winter conditions, strong winds central, north and west.

Much of Illinois, Missouri, Iowa, Indiana, central and southern Wisconsin, and central and southern Michigan: Numerous severe thunderstorms are expected this afternoon into tonight. Damaging winds are the main concern, with hail and a tornado risk also possible.
Northern Wisconsin into northeastern Minnesota, the Dakotas, and western and southern Minnesota: Ice, snow, and gusty winds are causing the most difficult winter travel in the Upper Midwest and northern Plains through Friday.
Southern California from the Grapevine south through Cajon Pass and San Gorgonio Pass: A combination of High Wind Warnings, Watches and Advisories through Friday night. Wind gusts 55-65 mph.

From the RV Mobile Command Center in Brunswick GA:

Here are the relevant National Weather Service Warnings, Watches and Advisories that will impact RV and Road travel over the next several days.

Scroll down to the always-updating graphics immediately below this forecast for the latest information and for weather impacts that do not meet NWS Alert criteria.

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Weather Impacts Pacific Time Zone:

— Washington Cascades and the northern and central Oregon Cascades: Columbia Basin corridors: Winter Storm Warnings and Advisories today with 4 to 8 inches of additional snow on the higher passes. Snow should taper off in Washington after late morning. I-90, US-2, US-12, US-20, US-26, US-97 impacted.

— Central Washington Kittitas Valley, south-central Washington and north-central Oregon: Wind Advisories late this morning through this evening. Gusts to 50 mph. I-82, I-84, I-90, US-26, US-97, US-395 impacted.

— Southern Oregon Cascades, Siskiyou Summit, and Deadman Pass: Winter Storm Warnings and Advisories through late evening with additional snow up to 7 inches. Snow-covered passes, slick roads, and slower travel. I-5, US-20, US-26, US-97 impacted.

— Western Siskiyou County and southwest Oregon valleys: Freeze Warning beginning Friday morning through Friday midday with temperatures dropping into the upper 20s to near 32 degrees.

— Northern California passes and Siskiyou County: Winter Weather Advisory through this morning into this afternoon with 1 to 5 inches of additional snow, locally higher in the mountains. Slick roads and slower travel on higher routes. US-395, CA-139, CA-299 impacted.

— Donner Pass and the northern Sierra into western Nevada: High Wind Warnings and Advisories through late tonight with gusts 50 to 70 mph in wind-prone areas. Hazardous crosswinds and reduced visibility in exposed terrain. I-80, US-6, US-50, US-93, US-95, US-395 impacted..

— Southern California from the Grapevine south through Cajon Pass and San Gorgonio Pass: A combination of High Wind Warnings, Watches and Advisories through Friday night with gusts 55-65 mph, . Hazardous crosswinds for high-profile vehicles and difficult travel. Strongest winds along the Mojave Desert Slopes. I-5, I-8, I-10, I-15, I-40, CA-14, CA-58 impacted.

Weather Impacts Mountain Time Zone:

— Southern Idaho and the Snake Plain: Wind Advisory beginning late this morning through late tonight with gusts up to 45 to 50 mph. Hazardous crosswinds for high-profile vehicles and difficult travel in open country. I-15, I-84, and I-86 impacted.

— Southwest and south-central Montana into southern Wyoming: Winter Storm Warning beginning late this morning through Friday evening, and again from late evening into Saturday morning on parts of the region, with 6 to 18 inches of snow and gusts 45 to 55 mph. Snow-covered passes, blowing snow, and hazardous mountain travel. Bozeman Pass, Pipestone Pass, Togwotee Pass, and I-15, I-25, I-80, I-90, I-94, US-12, US-14, US-16, US-26, US-89, US-191, US-212 impacted.

— Southwest, central, and eastern Montana: Winter Weather Advisories continue through Saturday morning. Snow totals generally 1 to 7 inches, with slick roads and slower travel on passes and higher terrain. Homestake Pass, Pipestone Pass, and I-15, I-90, and I-94 impacted..

— Southern Wyoming including Sherman Summit and nearby stretches of the Laramie Range: High Wind Warning and Watches beginning this morning through Friday night with gusts up to 70 mph. Dangerous crosswinds for high-profile vehicles and possible restrictions for light trailers. I-25 and I-80 impacted.

— Northeastern Wyoming into far western South Dakota: Winter Storm Watch beginning Friday morning through Saturday morning. Heavy mixed precipitation possible. Total snow accumulations between 3 and 8 inches and a light glaze of ice accumulation. I-90, US-18, US-85, US-212 impacted.

— Northern Utah Mountains: Winter Weather Advisory through Friday morning. Snow expected initially above 8000ft, dropping below valley floors by this afternoon. Snow accumulations of 6 to 12 inches, with amounts in excess of a foot in the Upper Cottonwoods. I-80, I-84, US-89, US-189 impacted.

— Utah high terrain and western Colorado: Wind Advisory from around midday through late tonight. Gusty crosswinds will create difficult travel on exposed stretches and near summit approaches. Parleys Summit, Beaver Ridge Summit, Eisenhower Tunnel, and I-15, I-70, I-80, and I-84 impacted.

— Colorado Front Range and adjacent plains into northeast New Mexico and far west Texas: Red Flag Warning this afternoon through late evening or late tonight. Wind gusts 30-45 mph. I-25, I-40, I-70, US-40, US-50. US-62, US-64, US-70, US-87 impacted.

Weather Impacts Central Time Zone:

— Eastern North Dakota, eastern South Dakota, western and southern Minnesota, and eastern North Dakota: Winter Weather Advisories through this evening, followed by Winter Storm Watch beginning Friday morning into Sunday morning. 2-6 inches of snow, ice, and gusty winds will worsen travel over time. I-29, I-90 and I-94 impacted.

— Northeastern Minnesota into northwestern Wisconsin: Winter Storm Watches Warnings and Advisories through Friday morning, Additional snow and mixed precipitation will keep roads slick and slow travel on major north-south routes. 2-6 inches of snow and some ice accumulation possible. I-35 and I-94 impacted.

— Northern Wisconsin into west-central Wisconsin: Ice Storm Warning through late morning into this afternoon. Ice accumulations up to one quarter to four tenths of an inch will create very slick roads and dangerous bridge and overpass travel. I-39, I-43, I-90, and I-94 impacted.

— Much of Illinois, Missouri, Iowa, central and southern Wisconsin: Numerous severe thunderstorms are expected this afternoon into tonight. Damaging winds are the main concern, with hail and a tornado risk also possible. I-29, I-35, I-39, I-43, I-44, I-55, I-57, I-64, I-65, I-69, I-70, I-72, I-74, I-80, I-88, I-90, I-94, and I-96 potentially impacted.

— Indiana-Kentucky border counties this morning and western Kentucky: Dense Fog Advisory through late morning, then strengthening winds later today. Reduced visibility this morning, then increasingly difficult travel in gusty winds by afternoon. I-64, I-71, I-74, and I-75 impacted.

— Eastern Kansas into western and central Missouri: Flood Watch through this afternoon. Heavy rain may lead to flooding and ponding on roads. I-29, I-35, and I-70 impacted.

— Much of Oklahoma, Missouri, Illinois, and Iowa, with eastern Kansas and parts of north and central Texas: Numerous severe thunderstorms are expected Friday into Friday night. Damaging winds and hail are most likely, with tornado risk also possible. I-10, I-20, I-30, I-35, I-39, I-40, I-44, I-45, I-55, I-57, I-64, I-65, I-69, I-70, I-72, I-74, I-80, I-88, I-90, and I-94 potentially impacted.

— Central and eastern Oklahoma, parts of north and central Texas, central and southern Missouri, and central and western Arkansas: Flash flooding is possible Friday into Friday night. Repeated heavy rain may lead to water over roads and flooded low spots. I-20, I-30, I-35, I-40, I-44, and I-45 potentially impacted.

— Missouri River and central and northern Missouri: FLASH FLOOD WARNING through late morning for parts of central Missouri. Flood Warnings, Watches and Advisories today into Saturday on multiple rivers, High water in low-lying areas, flooded ramps and secondary roads, and water over roads remain the main travel concerns. I-35, I-70, US-50, US-54, US-65 impacted.

— Arkansas, Tennessee, Illinois, Missouri, western Indiana, and western Kentucky: Wind Advisory beginning late this morning through late evening. Gusts up to 45 to 50 mph will create difficult travel for high-profile vehicles across a broad swath of the Mid-Mississippi Valley. I-24, I-39, I-40, I-44, I-55, I-57, I-64, I-65, I-70, I-72, I-74, I-80, I-88, I-90, and I-94 impacted.

— The Texas and Oklahoma Panhandles: Red Flag Warning this afternoon through late tonight. Wind gusts to 30 mph. Dry winds and wildfire risk will make roadside fire starts more dangerous and could quickly affect travel visibility locally. I-27, I-40 impacted..

— Much of Louisiana and Mississippi, with central and southern Arkansas and parts of central and southern Texas: A few severe thunderstorms are possible Saturday into Saturday night. Damaging winds are the main concern, with hail also possible. Localized travel slowdowns are possible in heavier storm cores. I-10, I-12, I-20, I-45, I-49, and I-55 potentially impacted.

Weather Impacts Eastern Time Zone:

— Northern Michigan: Winter Storm Warnings and Watches for the Upper Peninsula and Winter Weather Advisories for the northern Lower Peninsula through Friday morning. Mixed precipitation with 1-3 inches of snow and up to 1/4 inch ice. Most severe conditions will be on the UP. I-74, US-2, US-41 impacted.

— Lower Michigan and adjacent Indiana: Wind Advisory beginning late this morning through late evening, Wind gusts to 45 mph. I-65, I-69, I-70, I-74, I-75, I-80, I-94, and I-96 impacted.

— Much of Indiana, and central and southern Michigan: Numerous severe thunderstorms are expected this afternoon into tonight. Damaging winds are the main concern, with hail and a tornado risk also possible. I-29, I-35, I-39, I-43, I-44, I-55, I-57, I-64, I-65, I-69, I-70, I-72, I-74, I-80, I-88, I-90, I-94, and I-96 potentially impacted.

— Much of Pennsylvania, Ohio, and West Virginia, with central and western New York: A few severe thunderstorms are possible Saturday into Saturday night. Damaging winds are the main concern, with hail and a tornado risk also possible. Travel disruptions may develop quickly where stronger storms organize. I-64, I-68, I-70, I-71, I-76, I-77, I-79, I-80, I-81, I-86, I-88, I-90, and I-99 potentially impacted.

— Northern Maine: Winter Storm Warning and Advisories beginning late tonight and continues through Friday evening. Snow and a light glaze of ice will create slick roads and slower travel. I-95, US-1, US-201 impacted.

— Vermont and New Hampshire mountain corridors: Winter Weather Advisory from this evening through Friday morning. Snow, sleet and freezing rain will affect higher-elevation travel. I-87, I-89, I-91, and I-93 impacted.

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