• Member Statistics

    16,741
    Total Members
    7,904
    Most Online
    gonglee
    Newest Member
    gonglee
    Joined
Sign in to follow this  
WAWA2c

Why all the L's on SLA

Recommended Posts

In looking at today's NOAA Surface Analysis issued 1645Z Sat Jan 11 2020, there are six Ls notated on the front stretching from above NY down to the Gulf.

I am trying to learn something here.  Is there a reason / criteria for all of them?  I would think from the Iso countour that yea, that is all low pressure.  And in general, often I see on SLA the pressure system notated multiple times close to one another.  Must be a reason.

 

Jonathan

Share this post


Link to post
Share on other sites

I often wonder the same thing - were you looking at the unified surface analysis?

I think that they put them any where that MSLP contours close - it may however be a contour level that's not plotted

besides front's, i also sometimes see many L's plotted in regions with very weak gradients - a relatively flat but undulating surface could have many places where contours close

it might also be be a because they see an area of convection on a satellite

i think it varies from forecaster to forecaster - some probably put more than others.., although i understand this is becoming automated, so it could be the computer that's doing it sometimes.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
Sign in to follow this  

  • Recently Browsing   0 members

    No registered users viewing this page.