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Winter 2024/2025 February Thread


AMZ8990
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5 big players, in my mind, using the 6z Euro as an example:

HcVCjiq.png

1 = main TRPV lobe, trapped under the retrograding block.

          Questions with this one: How far south is it? That guides the amp potential of 3, (initial shortwave energy). This is what helps kick off the initial wave of light snow that seems to pitter on on some model runs around Wednesday AM.

2 = Tail end of the TPV lobe, this has the most boom or bust potential IMO. 

          Questions with this. How far south and east does it swing? Far enough and we get a big juicy storm. If it stays far back we get more amp in 3 or 5 (main shortwave IMO, that really brings the snow with the CMC or Euro runs). Or it could run interference and be just close enough, but also just far away enough to suppress both 3 and 5. 

3 = initial, strung out, shortwave energy.

          Questions with this one. How strong and defined is it? Stronger and more well defined = more precip. with initial wave. 

4 = wild card STJ mess.

          Just noticed this connection when I looked at the above map to make this post. How much moisture and or mid level dry air does this inject to beef up or weaken the synoptic set up? Remember the drying out that happened back in Jan? Does look as likely this time, but who knows.

5= main shortwave. 

          In my mind this is the most important shortwave for us. Its amplification is what draws moisture to the north. Questions with this one were mostly noted above, but if this one and 2 were to somehow find a way to partially phase, you get a really nice storm. This scenario is what really brough the moisture back to us on the CMC run last night IMO:

giphy.gif

 

For MBY (and much of East TN IMO) that is the preferred scenario, but I think all are still on the table at this time. 

 

 

 

 

 

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And that friends is why trailing energy systems are the worst to track.  That GFS cutter the other day is almost laughable now. Ensembles overnight were very suppressed compared to their deterministic counterparts.  This looks like it may well swing well below us and try to come up the coast in reality.  Where is the SER when we need it?

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I'll take 20 days in phase 8 and then a loop back around.  But we will gladly take the CFS version which gives us 28 days in cold phases.  The BOMM and EMON(Euro ext) from two days basically stall the MJO in cold phases from now to the end of their runs in the middle of March.

2e9e5061-653c-405d-926f-6e1614e8cfd8.png

46448eb8-2f4a-4964-bec6-377c7a65a07a.png

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Pattern is similar to our cold spell back into Jan,wont be as cold but still BN.Think the MJO is still progressing  and the signal by most models want to mute it back or close into the COD,think the reason is a KW in the NH/Africa,as we get closer to then end of wk3.When we got cold into Jan the SOI was around -20+ and the AAM albeit was into the COD it was still +ve,the AAM IMHO showed the flip to a crappie upcoming pattern around the 14th of Jan.

 

14 Feb 2025 1011.54 1009.30 -12.01 13.41 9.01
13 Feb 2025 1012.66 1009.05 -5.43 13.68 9.22
12 Feb 2025 1013.17 1008.40 0.14 13.25 9.32
11 Feb 2025 1012.74 1006.95 5.04 12.61 9.45
10 Feb 2025 1012.30 1004.05 16.86 11.75 9.56
9 Feb 2025 1012.49 1001.90 28.10 10.48 9.53
8 Feb 2025 1011.98 1001.55 27.33 9.08 9.27
7 Feb 2025 1013.14 1001.60 32.66 8.01 9.02
6 Feb 2025 1012.63 1001.30 31.65 6.80 8.63
5 Feb 2025 1011.64 1001.80 24.50 5.85 8.12
4 Feb 2025 1011.76 1003.20 18.35 5.21 7.72

MJO-Madden-Julian-Oscillation-Forecast-02-14-2025_11_17_AM.png

Misc-Oscillations-Michael-J-Ventrice-Ph-D--02-14-2025_11_51_AM.png

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