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January 19-21 MW/GL/OV Storm Potential


snowlover2

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The NAM/GGEM are probably pretty close to the best scenario for you. If the trough went negative tilt farther west, well, the whole be careful what you wish for thing.

c'mon i'm not a newbie weenie, (I'm a veteran weenie), i've been following this stuff for close to a dozen years. Do you honestly think the thought of this thing winding up and crossing over western ohio hasn't entered my mind? i've seen that song play out more times then i care to remember.

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I would think the App Mts are way too small to have any major effect on the weather patterns or synoptic scale system...nothing like the Sierra or the Rockies.

I think they do. I once saw a map of climatologically favored storm tracks and there was a minimum over the Apps. Not that it can't happen, and crossing the Apps is one thing, but to get a storm to ride up the length takes some work.

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I think they do. I once saw a map of climatologically favored storm tracks and there was a minimum over the Apps. Not that it can't happen, and crossing the Apps is one thing, but to get a storm to ride up the length takes some work.

Its funny as I typed that quote I did some research and dug this up...

You will never see an low pressure system ride up the spine of the Apps. Low pressure system, like many physical things in this world, will always take the past of least resistance when traveling northward. Going up the APPS is not a path of least resistance, that's why you will never see a low go up the apps. (It also has to do with laws from Dynamic Meteorology that I'm not gong to go into -- Lots of Math)

What dictates whether a storm will go up west of apps, east of the apps, or jump from the western apps to the coast has to do with the position of mid level trough (500mb or H5) It's all about where that trough goes negative and if it's moving towards the east. If the H5 trough goes negative well west of the apps, you'll have a storm system that will track up west of the mountains. If you have a mid level trough that's got a strong vort max with it, have a neutral tilt while crossing the apps, and the take on a negative after it crosses, you'll see a low track up west of the apps, the xfer it's energy to a coastal low, and the primary low will start to fill. Finally, sometimes you wont have any low on the west side of the apps, and you'll have a low form on the east coast of the US due to an h5 trough with some tilt to it.

In answer to your second question...yes it does! Ocean temperatures are often times several degress warmer than the land. This will cause a tight temp gradient between the land and the sea, and you'll have converging winds in this area. Once the mid level trough moves over the area where the temp gradient is greatest a low will start to form in that general area.

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IWX WRF lookin' juicy

d01_runtotal72_syn.png

Good hit for MBY, anywhere from .4 to .6.. Just nudge it a tad north. With decent ratios, this could be a 6"-8" event... for Joliet to about Alek's neck of the woods. Also looks like some LES enhancement too...

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Good hit for MBY, anywhere from .4 to .6.. Just nudge it a tad north. With decent ratios, this could be a 6"-8" event... for Joliet to about Alek's neck of the woods. Also looks like some LES enhancement too...

But about half of that is tainted by tonight/tomorrow's action.

FYI

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Good hit for MBY, anywhere from .4 to .6.. Just nudge it a tad north. With decent ratios, this could be a 6"-8" event... for Joliet to about Alek's neck of the woods. Also looks like some LES enhancement too...

I'm assuming models are catching up with a secondary low?

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NAM bufkit

KCMH:

bufkitKCMH0zNAMjan18.jpg

KZZV(Zanesville)

kzzvbufkit0znamjan18th.jpg

It looks like this table is taking 24 snow measurements a day and then adding them together. Yikes! This is not how snow totals are measured (no more than 4 times a day). See this page why this results in erroneously high snow totals values:

http://www.meteor.ia...compaction.html

If you use the Bufkit snow accumulation display of the 00z NAM it shows lower snow totals (see the white plot below.

KCHM 6.7"

KZZV 8.2 "

post-3057-0-05256800-1295330330.jpg

post-3057-0-05244600-1295330351.jpg

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It looks like this table is taking 24 snow measurements a day and then adding them together. Yikes! This is not how snow totals are measured (no more than 4 times a day). See this page why this results in erroneously high snow totals values:

http://www.meteor.ia...compaction.html

If you use the Bufkit snow accumulation display of the 00z NAM it shows lower snow totals (see the white plot below.

KCHM 6.7"

KZZV 8.2 "

post-3057-0-05256800-1295330330.jpg

post-3057-0-05244600-1295330351.jpg

the only difference is you dont have ratios clicked on your program. Click on the snow ratios.

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