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Jan 11-12 Model/Forecasting Discussion


Ji

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The track on the GFS is nearly perfect for us. The low slides up the SC coast to off Hatteras before bombing and tucking in south of NJ. Slow it down another few hours and this could give us a legit MECS.

still 5 days out.

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Let's throw it out. DC can't get any appreciable snow in a strong Nina.

According to records, there has been no major snowstorm for the mid atlantic during a strong la nina. Being that east coast of Maryland, Jersey and Delaware got over a foot of snow should we also throw out the last blizzard?

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Admit it you are finally going to acknowledge we have a decent chance at a big storm.

based on how things were moving i was starting to think we'd get a storm of some sort. i dont think i believe the gfs verbatim right now.. it juiced up the gom activity a lot this run though. if that's something the others keep going with i guess it could be legit. there's a lot more going for it in general than the other events this yr.

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still 5 days out.

Agreed, but it was nice to see the SECS/MECS card being thrown down on the GFS (GGEM already had it at 12Z). That tells me a nice storm is legitimately within the envelope of solutions. This is the timeframe the models sometimes sniff these out before losing them at four days out. Still a long ride ahead. Euro will surely piss in our Cheerios.

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based on how things were moving i was starting to think we'd get a storm of some sort. i dont think i believe the gfs verbatim right now.. it juiced up the gom activity a lot this run though. if that's something the others keep going with i guess it could be legit. there's a lot more going for it in general than the other events this yr.

You can rarely believe the GFS verbatim 5 days out, but i like the optimistic Ian better then the depressed one.

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based on how things were moving i was starting to think we'd get a storm of some sort. i dont think i believe the gfs verbatim right now.. it juiced up the gom activity a lot this run though. if that's something the others keep going with i guess it could be legit. there's a lot more going for it in general than the other events this yr.

The southern wave transitioning into an open wave will wreak havoc on the models. Also the mass amount of QPF dumped and the extreme diabatic effects will weaken it considerably. GFS shows that...hence the slowdown before it phases/captures the southern wave. Another event where everything will have to work out perfectly. An interesting run though.

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The southern wave transitioning into an open wave will wreak havoc on the models. Also the mass amount of QPF dumped and the extreme diabatic effects will weaken it considerably. GFS shows that...hence the slowdown before it phases/captures the southern wave. Another event where everything will have to work out perfectly. An interesting run though.

so it's good for it to be weaker initially (gom) in the end? i was just thinking more qpf gathering in the gom means more opportunity to transport it northward.

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According to records, there has been no major snowstorm for the mid atlantic during a strong la nina. Being that east coast of Maryland, Jersey and Delaware got over a foot of snow should we also throw out the last blizzard?

No wait for the the real polar vortex to drop into Canada and pull everything north.

gfs_500_240s.gif

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You can rarely believe the GFS verbatim 5 days out, but i like the optimistic Ian better then the depressed one.

i've said it seemed like a 2-4/3-6 inch storm.. if things kept as they were that's where i'd go if it wasnt still at this range (but it's getting closer obviously). if the other globals follow up it could be real.. with the performance of late i dont expect this to lock in from here and look this good/better through the end like we saw in 09-10

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so it's good for it to be weaker initially (gom) in the end? i was just thinking more qpf gathering in the gom means more opportunity to transport it northward.

Oops I worded that bad. The mass qpf and diabatic heat release through the atmosphere weakens that southern migratory wave and slows it down so the GFS can capture it and phase the low/mid level circulation before tracking up the coast. That is what you want, but that will depend on the cutoff taking that really far S track. If that southern PV is too fast and not captured, this storm is OTS like 18Z. If it is too weak and dumps too much qpf, there is nothing to phase and this prolly heads OTS. This is going to be interesting to see how the models handle this event the next few days. I bet it won't be very good though.

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