#2319 "Backlit Parry Sound Archipelago Afternoon"

The mid-level deformation zone of the next storm was still some distance to the southwest. Parry Sound was probably in the path of the anticyclonic portion of this deformation zone with the col further to the northwest. The cirrus comprising the leading edge of the warm conveyor belts was shearing to the southeast.

Using my right hand and pointing my fingers in the direction of those cirrus elements forced me to point my thumb Nero downward. This told me that a vorticity minimum was driving the circulation behind that confluent asymptote. At a glance I knew what portion of the approaching storm was destined to befall the archipelago. There was a bit of confirmation cloud as well. Let me explain.

The basic approach is to apply the conceptual model of the deformation zone to the observed moisture patterns. A vorticity maximum is paired with the anticyclonic vorticity minimum across that approaching confluent asymptote branch of the deformation zone. Sometimes the vorticity maximum is strong enough to provide sufficient lift to create cloud even in the drier and cooler air mass. The altocumulus elements that I witnessed in the sky and included in the painting confirmed where we were in relation to the approaching storm. These altocumulus clouds were also moving toward the southeast but on the opposite side of the deformation zone line in the sky. The painting is the weather observation and the record of my experience. Simply, there was another autumn storm on the way.

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