Summary:
The strongest storm of the series will bring yet another round of heavy rain on already flooded rivers and saturated soils, high winds that may topple trees and power lines, and heavy snow on top of an enormous snowpack. Mudslides, flooding, rapid rises on rivers, and flash flood and debris flows on burn scars; and avalanches and infrastructure impacts become even more likely with this storm. Impacted Lanes: I-5, I-80, I-84, I-82, I-94, I-90
California
Winter Storm Warning remains in effect until 4 PM PST Tuesday afternoon
- Heavy snow. Additional snow accumulations of 10 to 20 inches at 5000 feet, and 2 to 4 feet at the higher passes. Winds gusting as high as 70 mph.
- Impacts: Travel could be very difficult to impossible. Strong winds could cause tree damage. Widespread blowing snow could significantly reduce visibility resulting in periods of near whiteout conditions.
High Wind Warning remains in effect until 4 PM PST this afternoon
- South winds 20 to 30 mph with gusts of 55 to 65 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.
Flood Warning remains in effect until further notice
- Minor flooding is forecast.
- Impacts: At 32.0 feet, Flood stage. Minor flooding. Lower Mill Street in Guerneville and Old Bohemian Highway in Monte Rio are expected to flood.
Flood Advisory remains in effect until 6 PM PST this evening
- Urban and small stream flooding caused by excessive rainfall continues.
- Impacts: Minor flooding in low-lying and poor drainage areas. Water over roadways.
Wind Advisory remains in effect until 4 PM PST this afternoon
- Southeast winds 20 to 30 mph with gusts up to 50 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 Wednesday afternoon
- Flooding caused by excessive rainfall continues to be possible. Flash Flooding of the Yolo Bypass is likely late Monday morning following the opening of the Sacramento Weir gates.
- 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. Storm drains and ditches may become clogged with debris. Extensive street flooding and flooding of creeks and rivers are likely. Area creeks and streams are running high and could flood with more heavy rain. Continued rises on mainstem rivers will lead to several river forecast points rising above flood stage, especially along the Cosumnes, Mokelumne, and Tuolumne Rivers. Flash flooding of the Yolo Bypass will occur late Monday morning following the Sacramento Weir opening. Water levels in the Yolo Bypass from West Sacramento south will rise rapidly.
Idaho
Winter Weather Advisory remains in effect until 11 AM MST Tuesday morning
- Snow expected with areas of blowing and drifting snow. Total snow accumulations of 3 to 8 inches. Up to 1 foot possible on upper slopes and ridges. Winds gusting as high as 35 mph.
- Impacts: Travel could be very difficult. The hazardous conditions could impact the morning or evening commute.
Tennessee
Freezing Fog Advisory remains in effect until 9 AM CST this morning
- Patchy visibilities of one quarter to one half mile in freezing fog, especially near bodies of water.
- Impacts: Hazardous driving conditions due to low visibility and potential frost on bridges.
Louisiana
Dense Fog Advisory remains in effect until 9 AM CST this morning
- Visibility one quarter mile of less in dense fog.
- Impacts: Hazardous driving conditions due to low visibility.
Additional Dense Fog Advisories include but are not limited to: Wyoming, South Dakota, Minnesota, Mississippi, South Carolina, North Carolina and Virginia
Additional Freezing Fog Advisories include but are not limited to: Mississippi
Additional Winter Weather Advisories include but are not limited to: Montana, Nevada, Wyoming and Utah
Additional Wind Advisories include but are not limited to: Washington, Oregon, Nevada, Utah and Arizona
Additional High Wind Warnings include but are not limited to: Oregon and Wyoming
