A heat burst occurred in the QCA overnight

DAVENPORT, Iowa (KWQC) – Another rare weather phenomenon occurred in the QCA this morning, a hot flash. A hot flash occurs when very hot, dry air falls from a decaying thunderstorm. For example, around 2 a.m., Muscatine’s temperature went from the mid-70s to the mid-80s in the span of 10 minutes, before slowly returning to the mid-70s.

The heat explosion occurred around 2 a.m.(KWQC)

Heatstroke is more common at night and occurs when warm, moist air stops rising in the storm. This allows rain to begin to evaporate and initially cool this layer and increase its downward descent. As this air descends, it evaporates all the moisture and eventually begins to compress and heat up. The heat blast will be complete once the warm, dry air reaches the surface and spreads in all directions.

Warm, dry air descends from a dissipating thunderstorm.
Warm, dry air descends from a dissipating thunderstorm.(kwqc)

Heat strokes are known to produce very strong winds and raise temperatures to over 100º. An example is from Wichita, Kansas in June 2011 when the temperature went from 85º at 12:22 a.m. to 102º at 12:42 a.m. Another example is Clovis, New Mexico, where winds were recorded between 70mph and 80mph causing widespread wind damage.

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