Sunday, June 7, 2009

Severe Weather - June 7

Once again a warm front will be draped across the plains states, from northern Kansas through southeast Nebraska and then across parts of southern/central Iowa. Areas along and south of this front are likely to see temperatures near/above 80 degrees this afternoon with surface dew points into the lower 60s. This will provide moderate to strong instability, and combined with ~40 knots of 0-3km wind shear across this sames area of eastern KS/NE and southern IA will provide an environment for supercells. The potential for supercells will be enhanced by an increasing low level jet across the plains states, and any outflow boundaries that may be situated in this warm sector. Thunderstorms should develop along these outflow boundaries in vicinity of the warm front, indicating likely areas of initiation to northeast Kansas, southeast Nebraska and potentially into southwest Iowa. Thunderstorms in the early stages are likely to contain very large hail and the potential for tornadoes; as storms continue into the overnight we could see one or more clusters of storms. These clusters are likely to continue the threat of large hail and especially damaging winds across the remainder of southern/eastern Iowa.

Additional updates are possible this afternoon as storms begin to develop...

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