Storms in the West and dangerous Lake Effect Snows in the Northeast

Lake Effect Snow Warnings and Winter Weather Advisories Southwest and central New York and northwest Pennsylvania this morning through Monday afternoon: 3–8 inches of snow with wind gusts 45–50 mph and a high chance of intense squalls rapidly producing extremely dangerous driving conditions.
Winter Storm Warnings and Advisories Adirondack Mountains in New York, Green Mountains in Vermont, and northwest New Hampshire this morning through Monday evening: Up to 10–18 inches of snow on west- and northwest-facing slopes with wind gusts to 35 mph creating hazardous travel.
Winter Weather Advisories Northern Sierra Nevada Mountains in California above 6000 feet this evening through Monday afternoon: 4–10 inches of snow with snow levels lowering to 5500–6000 feet and brief breaks followed by another system tonight into Monday.

From the RV Weather Field Office in State College PA:

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:

— Parts of southwest WA; northwest and west-central OR: Areas of fog and mist are developing late this evening, producing widespread visibility of 1 mile or less across the lower elevations. Particularly fog-prone areas including sheltered Coast Range valleys, low spots within the Willamette Valley, and locations near rivers or other water sources are the most likely to experience visibility of 1/4 mile or less. I-5, US-20, US-26, US-30, US-101 impacted.

— Most of CA: Multiple storms will bring rain, heavy at times, today through Monday, to most of the state except for the desert southeast. Precipitation amounts through Tuesday will be 2-4 inches in the mountains and 1/2 to 2 inches in the valleys and on eastward-facing terrain. I-5, I-80, US-50, US-101, CA-1, CA-99 impacted.

— CA west slope Northern Sierra Nevada Mountains above 6000 feet, including Donner Pass and Echo Summit: Winter Weather Advisories this evening through Monday afternoon. 4-10 inches of snow likely. Snow levels 6500-7000 feet today, then lowering to around 5500-6000 feet by Monday morning. A brief break in moderate snow is expected this evening ahead of the next system tonight through Monday. I-80, US-50 impacted.

— Much of Central CA west of I-5, from the Delta southward to San Luis Obispo: Strong winds this evening into Monday. Wind gusts to 40 mph along the Big Sur coast and to 50 mph across the Delta. I-5, I-80, I-680, US-101, CA-1, CA-4, CA-12, CA-84, CA-160

— Central and southern CA, east of the San Joaquin Valley, on the lower slopes of the central and southern Sierra Nevada: Flood Watches through this afternoon. An additional inch or so of rainfall is likely. CA-41, CA-49, CA-140, CA-155, CA-168, CA-178, CA-180, CA-190 impacted.

— CA Central and Southern Sierra Nevada Mountains above 7000 feet: Winter Weather Advisories through this evening. Total snow accumulations will be up to a foot. US-6, US-395 impacted.

— Parts of southwest NV above 6000 feet: Winter Weather Advisories late tonight through Tuesday morning. 3-6 inches of snow expected. US-6, US-95, NV-266, NV-267, NV-375 impacted.

— Southwest NV Sheep Range and Spring Mountains – Red Rock Canyon north and northwest of Las Vegas: Winter Weather Advisories Monday afternoon through Tuesday evening. Total snow accumulations between 2 and 4 inches above 6000 feet; between 3 and 6 inches above 7000 feet; between 5 and 10 inches above 9000 feet. US-95, NV-160 impacted.

Weather Impacts Mountain Time Zone:

— North-central and northeast MT: Dense Fog Advisories linger into late this morning. I-94, US-2, US-87, US-191 impacted.

— West-central WY Teton and Gros Ventre Mountains above 7500 feet: Winter Weather Advisories this evening through Monday evening. Total accumulation of 6 to 10 inches, with up to 12 inches on western facing peaks. The heaviest snow is expected from late Sunday night into Monday morning. Snow levels start at 9000 feet and quickly lower overnight. US-26, US-89, US-189, WY-22 (Teton Pass) impacted.

— Southwest and central WY; western and south-central CO; central, southern and eastern UT; central and eastern AZ; west-central, northwest and north-central NM: Rain moves across this region from southwest to northeast today and tonight. Rainfall amounts generally 1/4 to 1/2 inch except 1-2 to 1 inch on higher westward- and southward-facing terrain. I-15, I-17, I-40, I-70, I-80, US-89, US-191 impacted.

— South-central WY Sierra Madre Range (south of I-80); parts of central and southwest CO: Winter Weather Advisories this afternoon through Monday. Accumulations will range from 4-8 inches in the south to 6-12 inches in the north. Snow levels 10000 today, falling to 7500 feet overnight. US-40, US-160, US-550 impacted.

— Central and south-central WY; central CO; central NM: Strong winds develop late tonight night and continue into Monday. Wind gusts 30-50 mph. I-25, I-40, I-70, I-80, US-24, US-40, US-50, US-54, US-70, US-82, US-64, US-160, US-285, US-287 impacted.

— Parts of southwest and south-central UT: Winter Weather Advisories continue through early Monday morning. 2-6 inches snow above 7500 feet and 6-12 inches snow above 9000 feet. Snow levels will start near 9500 to 10000 feet this morning, falling to near 7500 feet by this afternoon. Snow levels will fall as low as 6500 to 7000 feet in heavier precipitation this afternoon into Monday morning. I-15, US-89 impacted.

— Southeast UT; southwest CO; central and eastern AZ; much of western NM: Strong winds today and this evening. Wind gusts to 40 mph. I-10, I-17, I-19, I-25, I-40, US-60, US-64, US-70, US-160, US-191, US-380, US-491 impacted.

Weather Impacts Central Time Zone:

— Western ND: Dense Fog Advisory through late this morning. I-94, US-2, US-12, US-85 impacted.

— Parts of northwest, central and south-central ND; central and parts of eastern SD: Strong winds Monday afternoon. Wind gusts to 35 mph. I-29, I-90, I-94, US-2, US-12, US-83, US-212 impacted.

— Southeast LA; southern MS; southwest AL; western FL Panhandle: Dense Fog Advisories this morning. I-10, I-12, I-55, I-59, I-65 impacted.

Weather Impacts Eastern Time Zone:

— Eastern MI Upper Peninsula; parts of northern MI Lower Peninsula: Winter Weather Advisories for Lake Effect Snows through Monday morning. Total snow accumulations 3-6 inches. Frequent squalls will be possible through the day today. Wind gusts to 40 mph. I-75, US-2, US-23, US-31, US-41 impacted.

— Much of northern and eastern OH: Strong winds today. Wind gusts to 35 mph. I-70, I-71, I-75, I-76, I-77, I-80, I-90, OH Turnpike impacted.

— NY Adirondack Mountains; VT Green Mountains; northwest NH: A combination of Winter Storm Warnings and Advisories this morning through Monday evening. Up to 10-18 inches of snow on west and northwest-facing slopes. Wind gusts to 35 mph. I-87, I-89, I-91, US-2, US-3, US-4, US-5, US-7, US-9, US-11impacted.

— Parts of southwest and central NY; northwest PA: A combination of Lake Effect Snow Warnings and Winter Weather Advisories this morning through Monday afternoon. 3-8 inches of lake-enhanced snows. Wind gusts 45-50 mph. There is a high chance of intense snow squalls coming across the interstates that rapidly create extremely dangerous driving conditions. I-79, I-80, I-81, I-86, I-88, NY Thruway impacted.

— Much of western and central NY; central and eastern PA; NJ; MD; DE; eastern WV; VA; much of NC: A combination of Wind Advisories and Red Flag (fire danger) Warnings today into tonight. Wind gusts 40-50 mph. I-64, I-66, I-68, I-70, I-76, I-77, I-78, I-80, I-81, I-83, I-84, I-86, I-87, I-88, I-90, I-95, I-99, US-9, US-13, US-50, NJ, PA, Mass Turnpikes, NY Thruway, Garden State Parkway impacted.

— Northern ME: Winter Weather Advisories through Monday afternoon. Snow expected. Total snow accumulations between 4 and 8 inches expected. The highest snow totals are expected to be west of the ME-11 corridor. I-95, US-1, US-2, US-201 impacted.

— Southwest and southeast GA; northern FL Peninsula: Dense Fog Advisories this morning. I-10, I-75, I-95, US-1, US-17, US-19, US-27, US-98, US-301 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.