Jump to content
  • Member Statistics

    17,606
    Total Members
    7,904
    Most Online
    ArlyDude
    Newest Member
    ArlyDude
    Joined

January storm threat discussion #2


Ian

Recommended Posts

  • Replies 1.7k
  • Created
  • Last Reply

After looking at that map, I don't know whether this post is good news or bad. I did a scatter diagram of all all the 4 inch or greater events since 150 except the one last year showing the NAO index value versus the AO index value. The surprising thing to me is it looked like the negative AO had a higher freuqency of 4 inch or greater event than the NAO. I think it might be because the NAO is actually measure as the difference between the heights or pressure from the Azores to Iceland which is a little east of where we want our blocking. Anyway, here's the graphic. I have a pna versus NAO graphic that will be posted with a CWG peice tomorrow or Tuesday.

post-70-0-56339700-1326678116.gif

Link to comment
Share on other sites

After looking at that map, I don't know whether this post is good news or bad. I did a scatter diagram of all all the 4 inch or greater events since 150 except the one last year showing the NAO index value versus the AO index value. The surprising thing to me is it looked like the negative AO had a higher freuqency of 4 inch or greater event than the NAO. I think it might be because the NAO is actually measure as the difference between the heights or pressure from the Azores to Iceland which is a little east of where we want our blocking. Anyway, here's the graphic. I have a pna versus NAO graphic that will be posted with a CWG peice tomorrow or Tuesday.

post-70-0-56339700-1326678116.gif

What's encouraging to me from that graphic is that there are a bunch of events with either the NAO or the AO positive (I wasn't sure which axis was measuring what), and 16 with both positive.

Link to comment
Share on other sites

Here's a challenge: how many of those were in Ninas?

The 16 events constitutes 22 percent. The other question is how many had a positive PNA. I think then the percentage goes down to about 11% if I remember correctly but that will be in Tuesday's CWG piece. I never looked at enso. That may be the next step now that I've set up the spread sheet. I just need to find daily enso readings.

Link to comment
Share on other sites

Archived

This topic is now archived and is closed to further replies.

  • Recently Browsing   0 members

    • No registered users viewing this page.

×
×
  • Create New...