#2518 "Sunset Weather Story"

I needed to consult the water vapour imagery to really understand this sunset story. The upper cold low was still west of Chicago. 

The attached graphic shows that Singleton was under the anticyclonic companion of the warm conveyor belt. The southerly winds at cloud level were generating nice gravity waves in the associated altocumulus. The altostratus layer was south of the deformation zone and reaching for Singleton but that was as far north as the cloud would make it. The nimbostratus and much needed rain would remain even further south of Lake Ontario. Meanwhile, the cirrus of the warm conveyor belt was well to the north and catching the last rays of the setting sun. 

The anticyclonic curvature in the Langmuir streaks as viewed on the satellite imagery, confirmed that the col of the pattern was to the west - actually over Manitoulin Island. The western edge of the warm conveyor belt was also sculpted by a double-cyclonic deformation zone chain (Warming-Winds-Chains). 

With this background information, the gravity waves and curvature of the Langmuir streaks proved that Singleton was under the anticyclonic companion of the warm conveyor belt. The low level cold conveyor belt would keep our overnight temperatures low - dropping to plus 2 Celsius which was pretty chilly indeed for late May. The probability of rain at Singleton would depend on the track of the cold low which would determine the northward extent of the cyclonic companion and the weather. The cold low was at the latitude of Chicago and headed more southeastward due to the upper trough pattern over the eastern half of the continent. 

It would not rain at Singleton but areas south of the Great Lakes would get a lot. The end result was that it did not rain a drop at Singleton, consistent with the weather story told by the clouds. 

It was an interesting weather story and made for great bedtime reading. For this and much more art, click on Pixels. Thank you