Heavy Rainfall Threat Continues in the Southwest on Monday; Record Warmth in the Plains and Midwest

Remnant moisture from Tropical Storm Rachel will persist over portions of the Great Basin and Southwest on Monday, bringing a potential heavy to excessive rainfall risk. Well above average and potentially record breaking temperatures will develop across the Plains and Midwest early this week, spreading into the Lower Mississippi Valley and Southeast midweek. Read More >

Automatically generated image showing areas of 0-3 km storm relative helicity.


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Helicity (0-3 Km)

This is the 0-3 km (0-10,000 Ft. AGL) storm relative helicity which is a measure of the amount of wind shear available from the ground to roughly 700 MB. Values greater than 250 m**2/s**2 suggest an increased threat of tornadoes, but high values with this index do not necessarily suggest that the environment is supportive of supercell structures (look at 0-6 km shear). Larger values are generally better, but there are no clear "boundaries" between non-tornadic and significant tornadic supercells. Negative values suggest that anti-cylonic (left moving) supercells will dominate.

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Heavy Rainfall Threat Continues in the Southwest on Monday; Record Warmth in the Plains and Midwest

Convective Parameters - Helicity 0-3km