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February Medium/Long Range Thread


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44 minutes ago, psuhoffman said:

lol 

Im less sure what happens the next 15 days. Models have a history of teasing us at range in a TNH pattern only to shift NW come game time. But this year does feel different so I’m holding out hope but I’m more confident in where the pattern is heading after regardless of how these waves the next 2 weeks go. 
 

Chuck seems oddly invested in a warmer outcome for some reason. 

not sure why you brought him back into this thread

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I'm glad to see you posting Heisy.  When I heard them say that jet crashed in NE Philly, I  was worried about you.

I was at cottman and the boulevard like 1 hour before the crash. My wife was at her sisters which is walking distance from there. Wild.

On topic:
Pattern comes down to the -PNA, this month could be historic if things break right


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14 minutes ago, frd said:

Seems improved pattern favoring a SECS pattern is moving up quicker in time,  versus late month or a can kick.  

H5 typically has to be in place before a threat. I’m sticking to  Feb 20 estimate for when the ground truth changes. But 10 days ago all I had was faith in the seasonal pattern progression.  Then a week ago some hints started to show up that things were heading to this. Now the pattern is fully showing up on the eps right when it should. 

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Great sign that major ensembles are beating the se ridge down while linking the scandi and AK ridges for -AO at the end

My guess is that we flirt with the boundary for light mix/rain over the next 10 days, then we get colder

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3 hours ago, psuhoffman said:

lol 

Im less sure what happens the next 15 days. Models have a history of teasing us at range in a TNH pattern only to shift NW come game time. But this year does feel different so I’m holding out hope but I’m more confident in where the pattern is heading after regardless of how these waves the next 2 weeks go. 
 

Chuck seems oddly invested in a warmer outcome for some reason. 

How does this year feel different???

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32 minutes ago, CAPE said:

Euro? Looks pretty similar to the last run to me. Last couple runs have really picked up on the improved look in the NA, which makes sense given recent ens runs.

Euro site.  I'll  post yesterday's on top and today's on the bottom for weeks 2, 3, 4 and 6. Week 5 was similar. 

 

 

webp-worker-commands-6b84fb964d-zxclg-6fe5cac1a363ec1525f54343b6cc9fd8-z9xfeorn.webp

webp-worker-commands-6b84fb964d-cg56v-6fe5cac1a363ec1525f54343b6cc9fd8-1yjbyssj.webp

webp-worker-commands-6b84fb964d-j6hzj-6fe5cac1a363ec1525f54343b6cc9fd8-_kki32ve.webp

webp-worker-commands-6b84fb964d-zxclg-6fe5cac1a363ec1525f54343b6cc9fd8-o8drk8c1.webp

webp-worker-commands-6b84fb964d-xhmnd-6fe5cac1a363ec1525f54343b6cc9fd8-mib9xb56.webp

webp-worker-commands-6b84fb964d-cg56v-6fe5cac1a363ec1525f54343b6cc9fd8-t4r_51wb.webp

webp-worker-commands-6b84fb964d-zxclg-6fe5cac1a363ec1525f54343b6cc9fd8-_qcch84y (1).webp

webp-worker-commands-6b84fb964d-cg56v-6fe5cac1a363ec1525f54343b6cc9fd8-ay4oc404.webp

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12 minutes ago, mitchnick said:

Euro site. I'll put yesterday's on top and today's below. I'll  post yesterday's on top and today's on the bottom for weeks 2, 3, 4 and 6. Week 5 was similar. 

 

 

webp-worker-commands-6b84fb964d-zxclg-6fe5cac1a363ec1525f54343b6cc9fd8-z9xfeorn.webp

webp-worker-commands-6b84fb964d-cg56v-6fe5cac1a363ec1525f54343b6cc9fd8-1yjbyssj.webp

webp-worker-commands-6b84fb964d-j6hzj-6fe5cac1a363ec1525f54343b6cc9fd8-_kki32ve.webp

webp-worker-commands-6b84fb964d-zxclg-6fe5cac1a363ec1525f54343b6cc9fd8-o8drk8c1.webp

webp-worker-commands-6b84fb964d-xhmnd-6fe5cac1a363ec1525f54343b6cc9fd8-mib9xb56.webp

webp-worker-commands-6b84fb964d-cg56v-6fe5cac1a363ec1525f54343b6cc9fd8-t4r_51wb.webp

webp-worker-commands-6b84fb964d-zxclg-6fe5cac1a363ec1525f54343b6cc9fd8-_qcch84y (1).webp

webp-worker-commands-6b84fb964d-cg56v-6fe5cac1a363ec1525f54343b6cc9fd8-ay4oc404.webp

Yeah I see some difference at the surface on WB. I generally only look at h5 on the extended product, and I don't trust it for more than 10 days beyond the end of the ens run it initializes from. Too prone to going to boilerplate ENSO climo. Don't we know it after last winter.

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18 minutes ago, CAPE said:

We just experienced a longwave pattern that produced the coldest Jan in many years. Atmospheric memory.

Exactly.  We haven't seen that level of cold since (I think) February 2015.  And in my yard, we had snow cover for 3 weeks after that Jan. 6 event, before it finally totally got washed out this week (outside some huge piles still in parking lots).

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5 minutes ago, stormy said:

We just experienced a relax of the January cold pattern. I am on record for weeks of a likely cold late February and March.

I am not gloriously enthused about this feeling according to the latest GEFS Extended and ECMWF Weeklies.   

Is this person not aware that this January was as cold as 2014?

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17 minutes ago, mitchnick said:

Just when you think it's safe to come out, the Gfs is sniffing out a SSW around 2/14. It's been on it for days too along with the Geps.

 

gfs_Tz10_nhem_27.png

 I don't think this is very good trend if you are a Polar Vortex.

1738843200-i4BcFkILCVo.png

1739793600-JGpUZSkhC1o.png

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This ridge from Californina to Russia is a good example of what a cold 10mb (Stratosphere) looks like near the surface, as the effect of a stronger Polar Vortex at the Pole speeds up, and makes it down like the funnel of a tornado at 0-time. On its edges, in the midlatitudes a ridge is flexed. Below you see the down atmospheric effects of a cold/fast 10mb level, which is centered over western Greenland and the Davis Strait currently. 

1A-56.gif

Cold Stratosphere correlates to 500mb at 0-time.

Warm Stratosphere corrleates to 500 at +15-45 days. 

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