2024-2025 La Nina

[LakePaste25]

31 minutes ago, LibertyBell said:

why don't we get snowfall like that here when our SST are record warm?

In Japan, it’s usually cold air advection driven ocean effect snow, similar to lake effect snow off the great lakes. Far easier to get that when you’re east of a large body of water as opposed to the Atlantic where you need the southern and northern stream to phase and a favorable storm track, otherwise it’s mostly cold and dry.

[LibertyBell]

1 minute ago, LakePaste25 said:

In Japan, it’s usually cold air advection driven ocean effect snow, similar to lake effect snow off the great lakes. Far easier to get that when you’re east of a large body of water as opposed to the Atlantic where you need the southern and northern stream to phase and a favorable storm track. 

so theoretically for long island to get that kind of snow, they'd have to be like 50 miles east of where they are and then get the snow off the prevailing westerlies passing over warmer water and dumping the snow on the east side?

 

[LakePaste25]

4 minutes ago, LibertyBell said:

so theoretically for long island to get that kind of snow, they'd have to be like 50 miles east of where they are and then get the snow off the prevailing westerlies passing over warmer water and dumping the snow on the east side?

 

Yeah exactly. The longer the fetch across water the better. Of course you still generally need cyclonic flow, but a weak clipper or a storm passing offshore over the atlantic would probably be enough to do that. A developing 50/50 low lodged under a block would produce it for several days.

[LibertyBell]

32 minutes ago, LakePaste25 said:

Yeah exactly. The longer the fetch across water the better. Of course you still generally need cyclonic flow, but a weak clipper or a storm passing offshore over the atlantic would probably be enough to do that. A developing 50/50 low lodged under a block would produce it for several days.

I thought maybe some elevation to cause orographic lift would also help (like it does on the Tug Plateau), but that location in Japan is near sea level.