I’m glad to see a pro met here disputing the map. You can do whatever you want with this info, as I believe you work for NWS?
There are a number of issues with that map, particularly with southern Maryland. You may have seen my complaint earlier ITT about how my spotter reports disappeared. I E-mailed LWX asking why.
The issue seems to be that this year they started using “Dept of Highways” measurements in the PNS reports, which are not accurate IMHO. They told me that because I live next to State Highway, we both came up as “Prince Frederick 1 S” so their software must have overwritten my reports. I was told not to worry though, that my reports are still in their system. I don’t believe that explanation, as my reports are not on this map, nor on LWX site. Furthermore, I sent my report in- twice- with a timestamp after State Highway, and yet it still is not there anywhere. They used the larger total from State Highway (2.5”) to make a 2” contour over Calvert.
I reported 1.4” while State Highway had 2.5” There is zero chance State Highway is correct- all I can think of is that State Highway measures snow depth. I have clear visibility of their entire site, there is definitely no snowboard, nor any open place for them to measure.
I also questioned the lack of spotter reports for Calvert, they told me I was the only spotter that sent in a report in Calvert. I have no idea if that’s accurate or not, but it seems odd. I always see multiple reports from Calvert with any storm.
So if you see any spots on that map whose totals seem odd, check and see if it was based on a “Dept. of Highways” measurement. I doubt I was the only one with this issue.