Lingering winter chill suppressing tornadoes in 2013
Will the Trend Continue?
As temperatures trend upward moving into the summer, there will be an inevitable general uptick in the number of thunderstorms, severe thunderstorms and tornadoes. However, with such a slow start and a continuation of the overall weather pattern into the first part of the summer, 2013 is likely to remain well behind the curve for violent thunderstorms and tornadoes.
A large southward dip in the jet stream is forecast to continue into the first part of the summer by AccuWeather.com long range forecasters.
As heat builds over the West, clusters of thunderstorms are projected to form over the northern Plains and drive southeastward across the Midwest into parts of the South and mid-Atlantic during June into July. While this expected pattern can bring severe weather, it generally favors thunderstorms with strong straight-line wind gusts over tornadoes.
According to Paul Pastelok, head of the AccuWeather.com long range team of meteorologists, "The intensity of these storms will be partially dependent on how much warm, low-level moisture from the Gulf of Mexico is able to feed into the advancing storms."
Ideally, warm, moist air at the surface, combined with a wedge of cool, dry air aloft, is ideal for severe thunderstorms, which can produce tornadoes.
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