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Feb. 19th 2012 Winter Storm Obs./Disc.


WilkesboroDude

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I have been looking @ radar, water vapor and visible.

After panning back and forth an hundred times, I think the 2 s/w are going to meet up.

Reason why is the first s/w is rotaing and it has to slow down @ some point to make a complete rotation.

Second is that there is dry hole around GA, which is going to fill in later you can see this on visible and WV images as louds are starting to blow-up or billow up. This tells me the storm is going to slow down to make this transition.

Also this thing looks to have the ability to pull from gulf IF the roation is closed in time.

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I have been looking @ radar, water vapor and visible.

After panning back and forth an hundred times, I think the 2 s/w are going to meet up.

Reason why is the first s/w is rotaing and it has to slow down @ some point to make a complete rotation.

Second is that there is dry hole around GA, which is going to fill in later you can see this on visible and WV images as louds are starting to blow-up or billow up. This tells me the storm is going to slow down to make this transition.

Also this thing looks to have the ability to pull from gulf IF the roation is closed in time.

Good observation- the base reflectivity has a "feathery" look to it over NEGA through the southern Piedmont- this area will begin to fill in even before the bulk of the main precip gets into central NC

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This was supposed to prompt a met to say: "No, wait, our supersecret in-house model shows a quick burst of 1-2 inches for you tonight!"

Sigh ....

43/41 at the Shelby Airport .....

I think it's telling that nobody's really chiming in with posts on how this can overperform or certain things look like they're coming together for a big surprise. It seems like there's a growing potential of underperfmance vs. overperformance....just looking at some of the recent model trends.

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I have been looking @ radar, water vapor and visible.

After panning back and forth an hundred times, I think the 2 s/w are going to meet up.

Reason why is the first s/w is rotaing and it has to slow down @ some point to make a complete rotation.

Second is that there is dry hole around GA, which is going to fill in later you can see this on visible and WV images as louds are starting to blow-up or billow up. This tells me the storm is going to slow down to make this transition.

Also this thing looks to have the ability to pull from gulf IF the roation is closed in time.

I hope this is correct. I hate to be negative here but another snowfall map from the wral in house model is showing less snowfall as well.

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Good observation- the base reflectivity has a "feathery" look to it over NEGA through the southern Piedmont- this area will begin to fill in even before the bulk of the main precip gets into central NC

OK weenie post time, are you thinking that us in the CLT west to say Shelby have a good shot of cashing in on this if it occurs?

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I think it's telling that nobody's really chiming in with posts on how this can overperform or certain things look like they're coming together for a big surprise. It seems like there's a growing potential of underperfmance vs. overperformance....just looking at some of the recent model trends.

I think it has more to do with this winter dramatically underperforming as a whole- kind of saps the whole ability to "believe"

I like the base reflectivity sig. for central NC- it will fill in nicely later today- if you look at the national base reflectivity, you can start to "see" the signature and where the pivot could possibly occur- I have watched storms for years in NC, and this is a pretty good set up for snow

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Unfortunately the Nam and GFS have shifted at least the snowfall map a little North again here at the end. I hope that is wrong.

Makes a big difference when your on the line.

You can add the RUC to that as well as it shows virtually nothing in NC as far as accumulating snow and shifts a little further North with each run. It really never has the heavy precipitation ever getting into NC and has it all in Virginia throughout the run. Another thing I noticed on the RUC is that the organized precipitation is out of the Western half of the state by 9pm at which point there would only be spotty light rain or drizzle with temperatures in the mid 30's.

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rain and sleet here in reidsville.about 25/75 rain to sleet.

temp is 37

dp is 31

started a lot earlier then i expected.

But cant wait for it to turn over to snow here.

edit:snow is now mixing in .cant believe that it already has started to turn over.

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I know theres always the lean towards the model snow map, but just be aware that even though the model has alot of intricate processes calculated, the method to output them is not the same. Also, some model microphysics schemes have some trouble with snow. They dont see the full spectrum and assume a spherical snow with one snow density. Just something to think about when cliff jumping over the flucuations in snow maps.

Every winter storm it's the same, you start doubting yourself and the storm. However if W/S is getting snow mixing in already then those snow fall maps are going to be off for sure.

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You can add the RUC to that as well as it shows virtually nothing in NC as far as accumulating snow and shifts a little further North with each run. It really never has the heavy precipitation ever getting into NC and has it all in Virginia throughout the run. Another thing I noticed on the RUC is that the organized precipitation is out of the Western half of the state by 9pm at which point there would only be spotty light rain or drizzle with temperatures in the mid 30's.

It's almost pointless to look at the models at this point. The radar is telling the true story.

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OK weenie post time, are you thinking that us in the CLT west to say Shelby have a good shot of cashing in on this if it occurs?

Looking at the temps., we still need to get temps/DP to come down quite a bit, but I like the radar sig- the Feb. 26, 2004 storm comes to mind- had the same look to it, but not the same temperature profile- just depends if and/or when/where the low bombs out- that is when you get "surprises"

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The ruc is not the best model to follow for precipitation rates. Also, the qpf is one hour. Unless you have .25 inch per hour rain/liquid rates you are not going to see what you see on the other model outputs

You can add the RUC to that as well as it shows virtually nothing in NC as far as accumulating snow and shifts a little further North with each run. It really never has the heavy precipitation ever getting into NC and has it all in Virginia throughout the run. Another thing I noticed on the RUC is that the organized precipitation is out of the Western half of the state by 9pm at which point there would only be spotty light rain or drizzle with temperatures in the mid 30's.

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My sujestion is to stop looking @ models and start looking at the facts. The facts are radar and Satelitte now. If you start seeing gulf transport or backbuilding , slowing of system bingo. If you don't see these things happen nada. I have been wrong plenty of times!

BUt when you look @ history and facts of how we get snow and surpise snows these things happen.

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Looking at the temps., we still need to get temps/DP to come down quite a bit, but I like the radar sig- the Feb. 26, 2004 storm comes to mind- had the same look to it, but not the same temperature profile- just depends if and/or when/where the low bombs out- that is when you get "surprises"

Thanks. I really hope we can pull out a surprise!

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The ruc is not the best model to follow for precipitation rates. Also, the qpf is one hour. Unless you have .25 inch per hour rain/liquid rates you are not going to see what you see on the other model outputs

I was using a combination of the qpf and the simulated radar which has been trending more North with each run. As for precipitation rates if you look at MM per hour it is more useful in the one hour range. The RUC has been matching up pretty well with the current radar much of the morning.

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