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Feb 12-13 Sleet/Snow/ZR Event


JoshM

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I wonder if it is a situation in which the 2nd system's qpf is likely going to be negatively correlated with how strong/wet is system #1. In other words, if you'd prefer a wetter 2nd system, route for a drier/weaker first system? Is the first system robbing the 2nd system? Any opinions

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Well I guess it depends how you look at it. QPF was significantly lower than previous runs but it's still a pretty decent event with >.25 inches.

 

And almost no major ice.  I count that as a win for almost everyone!  I can do with just rain here to avoid ice.

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I wonder if it is a situation in which the 2nd system's qpf is likely going to be negatively correlated with how strong/wet is system #1. In other words, if you'd prefer a wetter 2nd system, route for a drier/weaker first system? Is the first system robbing the 2nd system? Any opinions

Based on what I saw it was due to a weaker s/w it actually looks like the GL low stays over the midwest longer this run, that's about the only positive thing to take away. I don't think having a slightly stronger overrunning out ahead of the s/w would weaken it.

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Not saying that is a bad run but if you look at the bigger picture this floods the country with pacific air, so to me something looks off. Not only are the models saying our winter storm is gone but models  are saying the cold is out of here. 

Makes sense looking at 500mb. No ridge to the east means the southern shortwave will speed on unimpeded while the northern shortwave says c'ya, ill hang with the ridge back west. Andddd begins the depressing stage of the "event" ... I hope not. 

 

u0rgz.png

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The 00z Canadian has a pretty textbook track with a HP in blocking position for a nice Miller A all the way.  It's got some nice overrunning out ahead of the surface low, too.  Big snowstorm, presumably, though the temperature maps aren't out yet.  It slides out to sea and basically misses NOVA-northwards.

 

Hr 132: http://meteocentre.com/models/gemglb_amer_00/P6_GZ_D5_PN_132_0000.gif

 

Hr 144: http://meteocentre.com/models/gemglb_amer_00/P6_GZ_D5_PN_144_0000.gif

 

Hr 156: http://meteocentre.com/models/gemglb_amer_00/P6_GZ_D5_PN_156_0000.gif

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The 00z Canadian has a pretty textbook track with a HP in blocking position for a nice Miller A all the way.  It's got some nice overrunning out ahead of the surface low, too.  Big snowstorm, presumably, though the temperature maps aren't out yet.  It slides out to sea and basically misses NOVA-northwards.

 

Hr 132: http://meteocentre.com/models/gemglb_amer_00/P6_GZ_D5_PN_132_0000.gif

 

Hr 144: http://meteocentre.com/models/gemglb_amer_00/P6_GZ_D5_PN_144_0000.gif

 

Hr 156: http://meteocentre.com/models/gemglb_amer_00/P6_GZ_D5_PN_156_0000.gif

 

doesn't get much prettier than that as long as the soundings are good, and they should be with the H in place...

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Yeah, the Canadian is a big hit assuming the P-type maps are accurate.  Looks like it does mix with IP for a bit, but you're still probably easily looking at 6"+ for the western half of NC and maybe upstate SC.  If we're being picky, having the LP suppressed a little more south so that it passes more over Panama City and Jacksonville would probably be preferable (as opposed to passing over Waycross, haha).

 

Time for the Euro.

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 No, it is actually a huge hit for many in GA/SC/NC.

 Euro gives 1-1.5" of qpf of wintry precip in a wide band across GA/SC/NC. Run #6 in a row!! Also, it is colder in many spots and that may mean more IP than ZR and more S than IP in some areas. It will take some time to figure this out. Bottom line: this is another weenie dream run. Thank goodness it apears Brick is in bed!

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