Summary:
The constant atmospheric river weather pattern will persist on Friday through the weekend, especially in saturated California. Heavy to excessive rain is expected in northern and central California, southwestern Oregon and northwestern Washington on Friday, while heavy mountain snow will likely start in the Sierra. Meanwhile, some wintry weather is possible in parts of the East on Friday. Impacted Lanes: I-5, I-80, I-84, I-82, I-90, I-65, I-71, I-77, I-86, I-99, I-81, I-88, I-87, I-95
California
Winter Storm Warning remains in effect until 10 PM PST Monday evening
- Heavy snow possible beginning early this afternoon. Total snow accumulations of 3 to 6 feet possible. Winds could gust as high as 55 mph.
- Impacts: Travel could be very difficult to impossible. Gusty winds could bring down tree branches. Widespread blowing snow could significantly reduce visibility.
Flood Warning remains in effect until 9 AM PST this morning
- Flooding continues due to ongoing impacts.
- Impacts: Flooding of rivers, creeks, streams, and other low-lying and flood-prone locations is imminent or occurring. Several structures are flooded and some sand bagging operations are continuing. Numerous roads remain closed due to flooding. Expect many areas of slow moving or standing water.
Wind Advisory remains in effect until 6 PM PST Saturday evening
- South winds 15 to 25 mph with gusts 35 to 55 mph expected.
- Impacts: Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. Travel may be difficult, especially for high profile vehicles.
Flood Watch remains in effect until Sunday morning
- Flooding caused by excessive rainfall continues to be possible.
- Impacts: Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. Low-water crossings may be flooded.
Oregon
High Wind Warning remains in effect until 12 PM PST this afternoon
- Southeast winds 25 to 35 mph with gusts 65 to 70 mph.
- Impacts: Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles.
Wind Advisory remains in effect until 1 PM PST this afternoon
- South winds 20 to 25 mph with gusts up to 45 mph.
- Impacts: Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. Driving may become difficult, especially in high profile vehicles.
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Washington
Coastal Flood Advisory remains in effect until 12 PM PST this afternoon
- Minor coastal flooding expected.
- Impacts: Tidal overflow around high tide may cause flooding of lots, parks, and roads with only isolated road closures expected.
Flood Advisory remains in effect until 6:45 PM PST this evening
- Flooding caused by rain and snowmelt is expected.
- Impacts: Minor flooding in low-lying and poor drainage areas. Debris flows are possible in areas of steep terrain.
South Dakota
Dense Fog Advisory remains in effect until 10 AM CST this morning
- Visibility less than a half a mile in dense fog.
- Impacts: Hazardous driving conditions due to low visibility.
New York
Winter Weather Advisory remains in effect until 4 AM EST Saturday morning
- Snow expected. Total snow accumulations of 3 to 5 inches.
- Impacts: Plan on slippery road conditions. The hazardous conditions could impact the morning or evening commute.
Winter Storm Warning remains in effect until 7 PM EST this evening
- Snow. Snow accumulations of 6 to 8 inches.
- Impacts: Plan on slippery road conditions. The hazardous conditions will impact the morning commute with poor visibilities and snow covered roads.
Additional Winter Storm Warnings include but are not limited to: Nevada, Tennessee, North Carolina and Maine
Additional Wind Advisories include but are not limited to: Nevada
Additional Flood Watches include but are not limited to: Maine
Additional High Wind Warnings include but are not limited to: Wyoming
Additional Dense Fog Advisories include but are not limited to: Montana, North Dakota, Nebraska and Kansas
Additional Winter Weather Advisories include but are not limited to: Montana, Georgia, Tennessee, North Carolina, Kentucky, Virginia, West Virginia, Ohio and Pennsylvania