Scattered thunderstorms capable of producing damaging winds, large hail, and a few tornadoes are expected to develop across parts of the Ohio Valley and Lower Great Lakes this afternoon. Pockets of heavy mountain snow will develop over the Northern Rockies Wednesday evening into Thursday morning. Read More >
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4 Panel Display | Animated Loop Helicity (0-1 Km) This is the 0-1 km (approximately 0-3,000 Ft. AGL) storm relative helicity which is a measure of the amount of low level wind shear available for tornadogenesis. This is not a good indicator of supercell potential which is related more strongly to 0-6 KM vertical shear. Values greater than 100 m**2/s**2, do suggest an increased threat of tornadoes provided a supercell is present. Larger values are generally better, but there are no clear "boundaries" between non-tornadic and significant tornadic supercells. The arrows indicate the approximate right supercell storm motion using the Bunkers technique. |
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