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Jan 20th snow event


Thundersnow12

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Still on the lowest side of guidance in regards to precipitation, but it would be a high-end advisory snow for most east of IL

haven't checked soundings but at first glance the gfs looks like a warning criteria event for cmh... meanwhile the nam is light rain and drizzle from start to finish.

Amazing differences less than 48hrs out. Normally i'd ride the nam, but when the gfs refuses to budge this close, you have to give it at least some cred.

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Whoa where'd this come from! 4-6" for Toledo as of now it looks like. However as everyone's mentioning it's a tight gradient and that always makes for an interesting storm to forecast. With the amount of cold air associated with this cutter though I think there's a better chance of this storm moving south more on future model runs

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Whoa where'd this come from! 4-6" for Toledo as of now it looks like. However as everyone's mentioning it's a tight gradient and that always makes for an interesting storm to forecast. With the amount of cold air associated with this cutter though I think there's a better chance of this storm moving south more on future model runs

Where have you been?

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Still on the lowest side of guidance in regards to precipitation, but it would be a high-end advisory snow for most east of IL

The differences for us in Ohio are remarkable between the NAM and GFS for under 48 hours out. Just look at the timing too. At least we have the euro in our favor.

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There isn't much difference. I think this will have issues to the end of the run. These setups aren't easily handled. I remember one in February 2008 that at the last sec, made a big northern push and columbus got rain lol

LOL. Well, for us here in Northern Indiana, small differences are big. I am in Marion and this run looks a lot better than the 12Z for me, although we may still have some mixing issues.

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The differences for us in Ohio are remarkable between the NAM and GFS for under 48 hours out. Just look at the timing too. At least we have the euro in our favor.

yep, for folks further north and west it's pretty much a question of how much. For us it's how much and what. Our juice is coming up from the south, not really a part of the precip that will be affecting chicago and those areas.

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haven't checked soundings but at first glance the gfs looks like a warning criteria event for cmh... meanwhile the nam is light rain and drizzle from start to finish.

Amazing differences less than 48hrs out. Normally i'd ride the nam, but when the gfs refuses to budge this close, you have to give it at least some cred.

GFS at hr 54:

gfs_namer_054_850_temp_mslp_precip.gif

NAM at 54:

nam_namer_054_850_temp_mslp_precip.gif

Just a tad different, no?

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Yeah, I remember those columbus screw jobs quite well as I lived their since childbirth before moving in the spring of 2008. Generally on the edge, then that last push ko's us. That is what made March 2008 storm such a great parting gift. We were literally groundzero.

I'll tell you what though, except for last year and the donut hole block from hell, the years before that I-70 has been a nice surprise bullseye for quite a few clipper events.

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Our local respected guy went 5-9" basically area wide N of I-80... think he's a touch high on the high end amounts. Dynamics look good, just enough moisture, and overall good atmospheric set up should give most N of I80 a good 4-7" but still room for this to wobble N or S so not getting real excited yet. I do feel the S end of the snow band will tail off rapidly as some guidance is suggesting.

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Our local respected guy went 5-9" basically area wide N of I-80... think he's a touch high on the high end amounts. Dynamics look good, just enough moisture, and overall good atmospheric set up should give most N of I80 a good 4-7" but still room for this to wobble N or S so not getting real excited yet. I do feel the S end of the snow band will tail off rapidly as some guidance is suggesting.

The combination of the significant southern gradient and the very low Euro QPF has me on the pessimistic side of things at this point lol. My early guess was 1-3", but even that would be high if the 12z Euro verifies. So far the 00z guidance has been nice, so at least we're still in the game. :thumbsup:

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Personally, I prefer the GFS over the NAM because of the more southern extent with the QPF. This gives OKK and LAF a little bit of love.

The GFS has a lower grid resolution, so it tends to over-smooth cutoffs. Stick with the NAM, NMM, HRW and such and watch where it pegs that cutoff. My gut instinct is you end up on the unhappy side, but let's see.

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