Watching Potential Tsunami Impacts Across the Pacific Basin

A strong earthquake in the Pacific Basin has generated a tsunami wave. Tsunami Warnings and Advisories have been issued for Hawaii, portions of Alaska, Guam, American Samoa, and the West Coast of the U.S. Read More >

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Automatically generated image showing areas of surface-1km vertical shear.


Hour - 1	Hour - 2	Hour -3

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Shear (0-1km)

Surface-1-km Vertical Shear is the difference between the surface wind and the wind at 1-km above ground level. These data are plotted as vectors with shear magnitudes contoured. 0-1-km shear magnitudes greater than 15-20 knots tend to favor supercell tornadoes.

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Watching Potential Tsunami Impacts Across the Pacific Basin

Convective Parameters Shear - 0-1km