Jump to content
  • Member Statistics

    18,689
    Total Members
    11,691
    Most Online
    dorkchop
    Newest Member
    dorkchop
    Joined

The Jan 31 Potential: Stormtracker Failure or 'Tracker Trouncing


stormtracker
 Share

Recommended Posts

13 minutes ago, Amped said:

Hugging the nbm 

 

          This is exhibit A for the problem with using mean values from a large ensemble.    There are a handful of GEFS and ECMWFE members with huge snowfall totals, so the mean value ends up as a couple of inches.   But the 50th percentile map shows 0 for our area, and the chance of 1" of snow at KDCA is under 30%.

  • Like 4
  • Thanks 3
  • 100% 1
Link to comment
Share on other sites

1 minute ago, paulythegun said:

SREF has between 0 and 39.56" for DCA. The mean is 11.97' and the median is 2.97". Instead of using either of those, let's go with the average of the max and min: 19.78" of snow for DCA. THANK YOU FOR YOUR ATTENTION TO THIS MATTER!

The SREF was created to deal with the failure of January 2000. Therefore, the SREF is right. The End.

Link to comment
Share on other sites

9 minutes ago, high risk said:

          This is exhibit A for the problem with using mean values from a large ensemble.    There are a handful of GEFS and ECMWFE members with huge snowfall totals, so the mean value ends up as a couple of inches.   But the 50th percentile map shows 0 for our area, and the chance of 1" of snow at KDCA is under 30%.

So using the mean is misleading due to outliers. Using the medium is more reliable.  What about using the mode?

Link to comment
Share on other sites

12 minutes ago, SomeguyfromTakomaPark said:

That’s actually a pretty big jump NW, but I guess this model is even less useful than the GFS.  But you’d think there are some big hits in there to get the mean near 5 inches in dc. 

Over the last 10-15 years of sref observation, the only thing the SREF has been useful for is giving unrealistic hope when there is little. I'm feeling pessimistic down here. Blacksburg is calling for 4-8" and I'm feeling under 3

 

  • Like 2
Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

×
×
  • Create New...