IEM Daily Feature
Tuesday, 26 October 2010
Tuesday, 26 October 2010
Epic Pressure Falls
Posted: 26 Oct 2010 05:14 AM
The featured plot presents the 24 hour difference in observed
altimeter (atmospheric pressure) for the upper mid west. Values lower
than 24 mb (bombogenesis criteria is 24+ mb drop in 24 hours) are
highlighted. If you measure storm strength by the minimum pressure
observed, this storm may go down as the most powerful storm on record
in October and the strongest storm in 70 years. The altimeter reading
at Des Moines 28.94 inches around 1 AM this morning. A value below 29
has only happened four times since 1977 for Des Moines.
Update: It was pointed out that bombogenesis refers to the center of the low pressure system dropping at the 24mb/24hr rate, looking at individual station data is not sufficient.
Voting:
Good = 44
Bad = 9
Tags: bombogenesis