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Early August Wx Discussion


Baroclinic Zone

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Scoots, question, why do they always round up ? seems that over time that would lead to some skewing, this is BDL yesterday

TEMPERATURE (F)

YESTERDAY

MAXIMUM 84 220 PM 100 1949 84 0

MINIMUM 61 1159 PM 45 1964 62 -1

AVERAGE 73 73 0

As far as I know, it's rounded to the nearest whole number. Like 72.3 is 72, 72.5 is 73 etc. I've seen it round to a lower number, but I think what you don't see is the calculation of the exact high and low to the nearest 0.1F.
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Historically they may have rounded to the whole number so when processing the information on computers the value could be represented as a 8 bit short integer or 16 bit integer.  Once you start going to decimals you're talking 32 bits generally and back in the day that could have posed a problem.

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Scoots, question, why do they always round up ? seems that over time that would lead to some skewing, this is BDL yesterday

TEMPERATURE (F)

YESTERDAY

MAXIMUM 84 220 PM 100 1949 84 0 

MINIMUM 61 1159 PM 45 1964 62 -1 

AVERAGE 73 73 0 

Doesn't matter. The monthly mean doesn't average the daily means. It uses the summation of the maxes and mins.

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Doesn't matter. The monthly mean doesn't average the daily means. It uses the summation of the maxes and mins.

yeah that's what I thought, so in order to get a correct deviation over a specific period you would need to not just use temp deviation from normal for the period but rather each day based on normal for that day?
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Doesn't matter. The monthly mean doesn't average the daily means. It uses the summation of the maxes and mins.

Steve...check out any F6. Below the dailies you'll see a "SM" row with summations for various column variables. Those are used to calculate the monthly mean which wiped out any 0.5F round-ups in the daily data.

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Steve...check out any F6. Below the dailies you'll see a "SM" row with summations for various column variables. Those are used to calculate the monthly mean which wiped out any 0.5F round-ups in the daily data.

yeah I know what you mean. But when I was calculating the period from 7/21 to today I used daily departures. To get an exact number I would have to use the daily climate report for each day and put in exact departures.
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Wow what a winter ahead......

I went to shul yesterday to celebrate the bat mizvah of a friends daughter. As I was leaving, the rabbi chased me and caught me and asked..."what kind of winter?" I gave him my views and he said ok....I'll prepare.

I reminded him I'd don't do this for a living and forecasts a day away are often wrong but he's going with my call...lol.

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There will still be a trough in the east, or at least a tendency for one. I'd watch where that boundary hangs up. I do see the warm up potential, but the GEFS try to slightly cool us down again after the 22 or so.  The ridge out west does weaken for a time and the flow becomes less meridional, so that's when we try to warm up. If we are getting +3 or higher...it's probably going to be from overnight lows again.

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There will still be a trough in the east, or at least a tendency for one. I'd watch where that boundary hangs up. I do see the warm up potential, but the GEFS try to slightly cool us down again after the 22 or so.  The ridge out west does weaken for a time and the flow becomes less meridional, so that's when we try to warm up. If we are getting +3 or higher...it's probably going to be from overnight lows again.

 

 

Bootleg...

 

I mean torch.

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