Question on SPC Mesoscale site

[Carrie Halliday]

http://www.spc.noaa.gov/products/md/md0158.html

In this mesoscale discussion, there is the "marked" area with 2 red marks and symbols in it. What are these marks and what do they stand for?

 

[Walker Ashley]

Originally posted by Carrie Halliday
What are these marks and what do they stand for?

Light-moderate thunderstorm with no hail. Tim has a nice free pdf for decoding symbols like these for download: http://www.weathergraphics.com/dl/wxchart.pdf

Walker