National Weather Service United States Department of Commerce

Atmospheric River in the Pacific Northwest and Northwest California Early This Week

An atmospheric river event will bring heavy rains and rising snow levels to the Pacific Northwest and northwest California early this week. Snow levels will rise above 8,000 feet, and 4 to 7 inches of rain is forecast for the southwest facing slopes of the mountains. Minor river and localized flooding will be possible. In the east, winds decrease by Monday, and the week will be relatively dry. Read More >

Station     PAFC     Elevation  144 FT
Sun Nov 19 14:20:01 UTC 2017

Morning Vent Factor:

Temperature           19 Deg F
Mixing Depth MSL      216.6 m
Mixing Depth AGL      173.4 m
Transport Wind        1.54 m/s
Vent Factor           266

Forecast for Afternoon Vent Factor:

Temperature           25 Deg F
Mixing Depth MSL      850.8 m
Mixing Depth AGL      807.6 m
Transport Wind        2.57 m/s
Vent Factor           2075

 Vent Factor is considered a measure of the volume rate of horizontal transport of air within the mixing layer, per unit distance, normal to the wind. Units are measured in square meters per second or knot-feet.