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January 31-February 2 MAJOR Winter Storm


Powerball

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I cant believe most of Indiana is looking at 2-2.5 inches of QPF with only far southern Ind. actually getting plain rain. Most of us are going to get clocked in one form or the other. I forsee a few vacation days for me. Monday I'll stock up on beer and firewood.

I think us on the north side of Indy, could be majority of sleet. But, downtown area/I-70 southward is where I think the real ice issues will be..

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I cant believe most of Indiana is looking at 2-2.5 inches of QPF with only far southern Ind. actually getting plain rain. Most of us are going to get clocked in one form or the other. I forsee a few vacation days for me. Monday I'll stock up on beer and firewood.

Yes, stocking up on beer is very important. Stupid Sunday liquor laws.

I haven't looked at the details yet, but suffice to say at face value, the 0z GFS could/would be the biggest snowstorm I've seen in my life. :o

Not that I buy completely what's it selling, but still.

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Sean Ash (WXYZ/ABC) up here in Detroit finally bit the hook and mention the models showing 10"+ amounts for us. :thumbsup:

Paul Gross (WDIV/NBC) hasn't yet, but he kept emphasizing this storm means business and the models have shifted northward with the track over the last 24 hours. You does mention the potential for a mix however if the models keep trending NW. :arrowhead:

Paul Gross says 1-2" and Sean Ash says 2-4" with the WAA snows.

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Am i correct in assuming that it would be better to compare to 12z vs 18z based on the stuff the models get at each run?

Always seems that the 06z/18z runs are a bit different then 12/00z and my guess is that?

Yeah if I think the off-hour run is junk for whatever reason--I will revert to only the 12Z, for instance. Really can go both ways though--sometimes the off-hour runs are better. In this case the changes were consistent run-by-run on the GFS so I was ok using the 18Z to compare with tonights 0Z run. In this amped situation--sometimes track changes at 72+ hours out need to be taken with a grain of salt since there will be significant non-linear development of the low and likely a NW curving track--so tiny changes become larger with time than a situation with more linear development. If the whole mean shifted then there may be something going on--but with this one run I am not worried.

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Yeah if I think the off-hour run is junk for whatever reason--I will revert to only the 12Z, for instance. Really can go both ways though--sometimes the off-hour runs are better. In this case the changes were consistent by run-by-run on the GFS so I was ok using the 18Z to compare with tonights 0Z run. In this amped situation--sometimes track changes at 72+ hours out need to be taken with a grain of salt since there will be significant non-linear development of the low and likely a NW curving track--so tiny changes become larger with time than a situation with more linear development. If the whole mean shifted then there may be something going on--but with this one run I am not worried.

Thanks.

This is simply incredible to watch unfold especially for this region.

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Am i correct in assuming that it would be better to compare to 12z vs 18z based on the stuff the models get at each run?

Always seems that the 06z/18z runs are a bit different then 12/00z and my guess is that?

The 18Z and 06Z runs don't have all of the surface based upper air obs to initialize on, and uses the 12Z GFS 6hr forecast as a first guess. It does assimilate aircraft and sat data, sfc data, etc.. As a general rule, I don't pay much attention to the 18Z and 06Z runs, and when I do except the only thing I really pay attention to is perhaps the first 48 hours.

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