Jan 22, 2012

Signature Event #1

October 11-16
November 25-30
January 10-15
(first posted Dec-8, 2011)
(updated Jan-22, 2012)

I am labeling this a 'signature event' because of the significant warm up, temps 10+ degrees above average, followed by a cool down bringing temps back to average or slightly below and the half inch plus of precipitation in each of the first two cycles, a little less than a half inch in the third cycle. The cycle duration around this recurrence is about 46-ish days. It's plain to see the trough was oppositely tilted from one cycle to the next. The high pressures on both coasts could be considered culprits for the tilting and the squishing of the November trough tightly together while the Atlantic high then aided in creating a 'cut-off' low to form. Perhaps slowing the cycle a bit. The January version of the pattern had hints of both previous versions within it.

500mb Plot Comparison
(click on the image for a larger view)

Radar Comparisons
(20111011-16_usradar)
(click image for the loop - 14MB)

(20111125-30_usradar)
(click image for the loop - 14MB)

(20120110-15_usradar)
(click image for the loop - 14MB)

500mb Height and Max Temp Trends


I am anticipating the recurrence of this pattern in middle January. I wrote the previous sentence back on Dec 8, and now with this update the recurrence of this pattern will take place near the end of February and beginning of March. Will it bring snow or will it bring rain? If there are any questions or thoughts on my research and analysis of the LRC or how I presented the material just let me know in the comments section of the blog. Thanks for reading!