I first heard about Lezak's Recurring Cycle theory in early October of 2010 from WISN12's Jeremy Nelson. My initial thoughts were that it was too good to be true. Then it happened, I was convinced after one in-depth analysis that it indeed existed. I will admit it didn't take long for me to buy in and afterwards I wondered why I hadn't heard about it before. A little over a year later and an extreme amount of hours dedicated to research and analysis, following the theory has grown into a passion. To this day I endorse the theory to my fullest capacity.
Caught up in all the hype and excitement of learning more about the LRC last winter I attempted a backyard snowfall forecast. Little did I realize that this endeavor would be the proverbial tip of the iceberg. Following the LRC for the past year has led me down a path of constant learning about the upper atmosphere and how it affects the weather on the surface. The benefits of following the theory and thus knowing the likely weather and climate scenarios weeks and months ahead of time are boundless.
In 2011 the OSNW3 backyard snowfall forecast has evolved into a Oshkosh Winter Forecast pin pointing specific weather events and surface weather trends for the area. An exciting project only truly conceivable because of the LRC.
Again, What Is The LRC?
The ’LRC’ which stands for Lezak’s Recurring Cycle is a weather pattern theory based on the following:
* A unique weather pattern sets up every year between October and November
* The weather pattern cycles, repeats, and continues through winter, spring and into summer.
* Long term long-wave troughs and ridges become established and also repeat at regular times within the cycle. These dominant repeating features are a clue to where storm systems will reach peak strength, and where they will be their weakest.
* The LRC isn’t just one long-wave trough, storm system, or ridge. It is a sequence of troughs and ridges that are cycling across the Northern Hemisphere.
To put this in very simple terms, the weather pattern that occurs in October and November repeats thru the winter, spring, and into summer. The cycle length will vary each year.
No reason to reiterate any more words of Jeremy Nelson of WISN12 or Gary Lezak of LRC Weather. With the cycle duration in clear sites, the cycling weather patterns will now do what they do. Please visit Jeremy's and Gary's winter forecast, linked below, as they dissect the long term long wave troughs and ridges that will be our weather until summer!
Weather Watch 12
To create the 2011-12 Oshkosh winter forecast I am leaning on all of my rookie year experiences following the LRC. The main focus being the affect the atmospheric flow 18,000 feet above the earth has on the OSNW3 recorded surface data throughout the seasons and each cycle of the LRC. The predictions below are based on a 46-48 day cycle duration. Shrinking and expanding of the duration will take place as the seasons move along.
Disclaimer: It is understood that the weather can change instantly and despite my best attempts to understand the weather patterns my weather predictions might be incorrect.
Notable Weather Events
Cycle 1 (Nov-25 thru Jan-2)
-Early Dec Cold
-Late Dec Snowstorm/Cold
-New Year Warm-up
Cycle 2 (Jan-3 thru Feb-19)
-Mid Jan Warm-up
-Late Jan/Early Feb Cold
-Mid Feb Snowstorm/Cold
-Mid Feb Warm-up
Cycle 3 (Feb-20 thru Apr-7)
-Early Mar Warm-up
-Late Mar/Early Apr Snowstorm/Cold
-Early Apr Warm-up (spring clean-up)
Cycle 4 (Apr-8 thru May-25)
-Early May Flakes (chilly start to golf leagues)
Events are open to deeper daily analysis queries if desired. This leads into the main focus of any winter forecast. Snowfall!
Days with Measurable Snow
C1 = 13 (Nov-25 thru Jan-2)
C2 = 12 (Jan-3 thru Feb-19)
C3 = 4 (Feb-20 thru Apr-7)
C4 = 2 (Apr-8 thru May-25)
Season = 31 (including the Nov-9 snowfall)
*9 days above average (1981-2010)
Total Snow Accumulation
C1 = 16" (Nov-25 thru Jan-2)
C2 = 17" (Jan-3 thru Feb-19)
C3 = 9" (Feb-20 thru Apr-7)
C4 = 1" (Apr-8 thru May-25)
Season = 45" (includes 2.1 from early Nov-9)
*11 inches above average (1981-2010)
The data trend leads me to believe that there will be enough warm spells to compensate for the majority of cold air events within each cycle leading to Above Average temperatures for the winter. The numbers tell me 1 to 3 degrees above average each cycle. Don't get me wrong, there will be some cold stretches this winter, there is no doubt about it, but with warm-ups scattered about may make the overall winter not seem so harsh temperature wise.
On Going Analysis and LRC Based Products
I am determined and focused on providing a different way of seeing the cycle. I have plans that include time-lapse and graphical grids. Besides that, I will keep up to date the forecast trends, calendar, and activity in the AccuWeather LRC Forum. The AccuWeather LRC Forum is a great place to exchange ideas and to continue learning the theory. I recommend it. The 2011-12 Forecast Trends are located below and are permanently located on the lower right hand side of the blog. The 2011-12 LRC Calendar can be found here and in the LRC Analysis Tools section on the upper right hand side of the blog. The trends are based on a 48 day cycle duration. The duration may be retracted or extended later on in the year as the cycle breathes if required to keep continuity.
(500mb Forecast Trend For Green Bay)
(Maximum Temperature Forecast Trend For Oshkosh)
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!