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February 11-12; 12-13: Are they real??


stormtracker
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6 minutes ago, Maestrobjwa said:

I'm wondering if that's gonna depend on how strong the Thursday cutter is...

Thursday also gets impacted by what Monday/Tuesday does.  Not a ton, because changes with the EPO ridge in NW Canada likely allows so much digging to happen in the Rockies/Plains I think even if Mon/Tues does everything possible to flatten or push things more S that Thursday is going pretty far north anyhow, but for up here and SNE it can probably make a marked difference for Thursday, in the MA likely no. 

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@mitchnickI think I found the answer wrt ensembles.  You know how is the EPS arill has us in like 8” mean over the next 10 days but it’s from 4 waves and none are that high prob. It was similar thing but condensed. Looking at the GEFS and eps from 3-4 days ago the snow was spread out over 60 hours. That’s not unusual for ensembles at range to have timing differences. But the thing is liking at the precip mean it’s clear there was always uncertainty over when and how much to amplify a wave this week between Tues and Thurs. But the big error was they were too far SE with the thermal boundary because even the members that had the trailing wave more amplified had it as snow!  We got those means because the members couldn’t agree on exactly which wave but it didn’t matter. They were all snow.
 

What happened was the operational shifted to this solution if a stringer second wave at the same time the guidance realized the thermal boundary was going to press NW after the initial cold push. There were ens members that had this type of progression but they showed snow for the second wave.  
 

The unifying error was that they through it was going to be colder than it actually is, or that the boundary was going to stay SE of us all week instead of just one day to be exact. 

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2 minutes ago, psuhoffman said:

@mitchnickI think I found the answer wrt ensembles.  You know how is the EPS arill has us in like 8” mean over the next 10 days but it’s from 4 waves and none are that high prob. It was similar thing but condensed. Looking at the GEFS and eps from 3-4 days ago the snow was spread out over 60 hours. That’s not unusual for ensembles at range to have timing differences. But the thing is liking at the precip mean it’s clear there was always uncertainty over when and how much to amplify a wave this week between Tues and Thurs. But the big error was they were too far SE with the thermal boundary because even the members that had the trailing wave more amplified had it as snow!  We got those means because the members couldn’t agree on exactly which wave but it didn’t matter. They were all snow.
 

What happened was the operational shifted to this solution if a stringer second wave at the same time the guidance realized the thermal boundary was going to press NW after the initial cold push. There were ens members that had this type of progression but they showed snow for the second wave.  
 

The unifying error was that they through it was going to be colder than it actually is, or that the boundary was going to stay SE of us all week instead of just one day to be exact. 

And Sherlock Hoffmann has cracked the case! Brilliant deduction good sir :clap:

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8 minutes ago, SnowGoose69 said:

Thursday also gets impacted by what Monday/Tuesday does.  Not a ton, because changes with the EPO ridge in NW Canada likely allows so much digging to happen in the Rockies/Plains I think even if Mon/Tues does everything possible to flatten or push things more S that Thursday is going pretty far north anyhow, but for up here and SNE it can probably make a marked difference for Thursday, in the MA likely no. 

Ah I see. So do you think Thursday in turn influences the weekend?

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1 minute ago, Terpeast said:

Like I said, models seem to be converging on a 2-4/3-5er DC metro with a little more south, less north

LWX AFD mentioned that the EPS min/max is quite wide... as low as an inch and as much as a foot across N VA 

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Just now, yoda said:

LWX AFD mentioned that the EPS min/max is quite wide... as low as an inch and as much as a foot across N VA 

Yeah, I think its gonna be somewhere in the middle, maybe probably a bit less than the middle. Will be interesting to see what the euro shows today.

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Seen this movie too many times over the last 6-8 years for Baltimore. I know how it ends.

I'm very aware of our climo and while I long for big storms, I fully appreciate how rare they are and how easy it is for us to go several years without anything really meaningful. But this is getting stupid. The entire state of VA, the beaches, and obv north and west of us have all jacked multiple times in recent years while we get the rug pulled again and again. I haven't whined about it once, but I'm reaching my breaking point, lol.

Shit is turning me into the joker. 

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20 minutes ago, yoda said:

There shouldn't really be any overlap with snow accumulations today... here are the 12z GEFS individual members through 108.  This is the closest I can get

gfs-ensemble-all-avg-ma-snow_total_multimember_panel-9404800.thumb.png.602afc581b789183e58306dd38ffa0bd.png

18 out of 30 put purple or pink over my yard. 30 miles South of DC. I like it a lot.

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4 minutes ago, TowsonWeather said:

Seen this movie too many times over the last 6-8 years for Baltimore. I know how it ends.

I'm very aware of our climo and while I long for big storms, I fully appreciate how rare they are and how easy it is for us to go several years without anything really meaningful. But this is getting stupid. The entire state of VA, the beaches, and obv north and west of us have all jacked multiple times in recent years while we get the rug pulled again and again. I haven't whined about it once, but I'm reaching my breaking point, lol.

Shit is turning me into the joker. 

Preach 

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