National Weather Service United States Department of Commerce

Powerful Pacific Storm to Continue Impacting Northern California; Heavy Snow in the Appalachians and Portions of the Northeast

A strong atmospheric river will continue to impact northern California with heavy rain and life-threatening flooding through Friday. Unsettled weather is expected across much of the Northeast and Great Lakes over the next few days, including the likelihood of heavy snow in the central Appalachians and higher elevations of northeastern Pennsylvania and southern New York. Read More >

Fire Weather Wind Adjustment Tool


UNSHELTERED FUELS: Fuel exposed directly to the wind. No or sparse overstory. Fuel beneath timber that has lost its foliage; fuel beneath timber near clearings or clearcuts; fuel on high ridges where trees offer little shelter from the wind.

1. Fuels usually partially sheltered.
2. Fuels
usually fully sheltered.

Fuel Model

4
California
Chaparal

20' RAWS Wind

Eye Level Wind
(midflame)

13
Heavy Slash
20' RAWS Wind

Eye Level Wind
(midflame)

1, 21, 3
Grass

5, 6, 71
Shrub/Brush

8, 9, 102
Timber litter

11, 12
Light/Medium Slash
20' RAWS Wind

Eye Level Wind
(midflame)


PARTIALLY SHELTERED FUELS: Fuel beneath patchy timber where it is not well sheltered; fuel beneath standing timber at midslope or higher on a mountain with wind blowing directly at the slope.
20' RAWS Wind

Eye Level Wind
(midflame)


FULLY SHELTERED FUELS: Fuel sheltered beneath standing timber on flat or gentle slope or near base of mountain with steep slopes.
Open Stands
20' RAWS Wind

Eye Level Wind
(midflame)

Dense Stands
20' RAWS Wind

Eye Level Wind
(midflame)