Special Weather Statement issued September 14 at 12:08AM CDT by NWS
Effective: 12:08 a.m. on Thursday, Sept. 14, 2017
Expires: 2:15 a.m. on Thursday, Sept. 14, 2017

...Strong winds possible from potential heat burst over Hamilton
Strong winds and a rapid but brief warming spike in temperatures
will be possible over Hamilton county through 1 am as weak
thunderstorms slowly dissipate. This rare weather phenomenon
called a heat burst should be fairly localized across Hamilton
Heat bursts are caused by decaying thunderstorms and only
develop in extremely unique environments. The rare setup
for a heat burst is dry air directly beneath a weakening elevated
thunderstorm. When a thunderstorm is weakening air within the
thunderstorm begins to sink. If this sinking air is very dry and
high enough it will begin to accelerate toward the ground since it
is more dense. Any remaining precipitation will fall through this
dry air and quickly evaporate. As the air continues downward, it
warms rapidly due to compression.

See more at NOAA