Severe Weather and Heavy Rainfall in the Plains Tonight; Heavy Rainfall and Flooding Along the East Coast of Florida

Severe thunderstorms with the potential for strong, damaging winds and a few tornadoes are expected through tonight across the central and southern Plains. Heavy rainfall may accompany these thunderstorms. Heavy rainfall will continue through tonight along the east coast of Florida and flooding will continue through Tuesday morning. Read More >

Automatically generated image showing areas of storm relative helicity.


Hour - 1	Hour - 2	Hour -3

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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Severe Weather and Heavy Rainfall in the Plains Tonight; Heavy Rainfall and Flooding Along the East Coast of Florida

Convective Parameters - Helicity