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madwx

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Posts posted by madwx

  1. 1 minute ago, Powerball said:

    My understanding of the Kuchera method is that it's based on a somewhat convoluted calculation of moisture content and lift in the DGZ.

    This is my first time hearing about the 17:1 ratio thing.

    Kuchera is actually really simplistic.  You just take the max column temp below 500 mb, subtract it from -2 celsius and add it to 12. 

    So for example if the max column temp was -12 celsius, you would do 10+12 so 22:1 ratios. 

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  2. waiting for the official number but looks like we got down to -12 or -13 this morning.  Just short of the record again.  We just had the 7th coldest first half of February for MSN.  Looking forward to the slow climb out of this now.  The cold has overstayed its welcome.

  3. 2 minutes ago, zinski1990 said:

    I know those are often ridiculous but why are they like that? Any reason 

    One reason is that they count any frozen precip as snow so in a storm with a lot of sleet it’ll be counted as 10:1 instead of 4:1 or so.   That’s not happening here but it may be something they are doing when calculating the kuchera method, like the max column temp they are using is lower for some reason which really inflates ratios 

  4. it really matters how much of the column is in the dendritic growth zone and other factors like fracturing of snowflakes by the wind.  Low temps don't always equal crazy high ratios.  For a major synoptic storm like this it's pretty tough to average more than 15:1.

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