Here are some charts comparing the caculated frost depth under a good layer of grass near a fence line next to a road ditch. I used the temperatures collected by sensors that are at a depth of 3 inches in my calculations.
 (leslies east frost depth 2012 - 2014- 1.jpg)
 (leslies east frost depth 2012 - 2014- 2.jpg)
 (leslies east frost depth 2012 - 2014- 3.jpg)
 (leslies east frost depth 2012 - 2014- 4.jpg)
 (leslies east 5 05 2013 002.jpg)
 (leslies east 2 19 2014 9 inches deep.jpg)
 (leslies east 1 17 2014 002 10 inch snow.jpg)
Attachments
----------------
 leslies east frost depth 2012 - 2014- 1.jpg (34KB - 83 downloads)
leslies east frost depth 2012 - 2014- 2.jpg (33KB - 87 downloads)
leslies east frost depth 2012 - 2014- 3.jpg (33KB - 71 downloads)
leslies east frost depth 2012 - 2014- 4.jpg (32KB - 87 downloads)
leslies east 5 05 2013 002.jpg (58KB - 82 downloads)
leslies east 2 19 2014 9 inches deep.jpg (68KB - 88 downloads)
leslies east 1 17 2014 002 10 inch snow.jpg (32KB - 93 downloads)
| 
winter 2012 2013 vs 2013 2014 calculated frost depth under sod
