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Upstate/Eastern New York-Pattern Change Vs Tughill Curse?


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.LONG TERM /THURSDAY THROUGH SUNDAY/...
Pronounced cold advection around the south side of a trowal is
evident across WNY by early Thursday morning. H85 temperatures drop
like a rock into the -12 to -14C range through the day with large
scale moisture secluding in the surface to 850 hPa layer around the
trowal and over Lake Erie. Soundings suggest impressive lake induced
instability, some synoptic moisture remaining, and a fetch of the
entire lake to work with through the day Thursday. Likewise, GFS and
Canadian Global wind fields favor confluent flow down the length of
the lake with a long axis of the lake band likely to come into WNY
somewhere near Buffalo for at least a solid portion of the day
Thursday. This is the time to watch for potential significant lake
effect snow accumulations in the metro Buffalo area. The same things
can be said for the Watertown area on the east end of Lake
Ontario...just lagging about 6 hours.

Wind fields wobble a bit Thursday night and suggest a bit of a
southward amble of both lake bands. This occurs while the next wave
is set to move through the Great Lake. The GFS is far deeper and
faster with the mid-level reflection of this system than the
Canadian and ECMWF. In fact, the 12z runs of the ECMWF and Canadian
really indicate little variation on the track of the surface low
with this system to our southeast Thursday night and Friday as is
moves from eastern Kentucky toward the NYC area. This places
our area solidly on the cold side of this system, however the
best deformation and attendant ascent remains to the SE of the
area. As such, PoPs were increased to likely for snow during
this time, however the best forcing/accumulations will likely
pass to our SE. Further, the GFS really does almost nothing with
this system, and it in fact doesn`t even develop the wave until
it passes off shore.

Another period of lake effect snow showers follows the Thursday
night and Friday system before large scale troughing starts to erode
over the region. This signifies moderation of the cold air by next
weekend in advance of the next system to affect the area.
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5 minutes ago, BuffaloWeather said:

Gfs would be major les event for Buffalo metro. 24-30 hours of stationary band. Euro switches the wind direction pretty quickly leaving a marginal event with quick moving bands. 

Well the GFS did sniff out the flatter wave first for this event we just had so I’m holding out hope it’s correct.

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16 minutes ago, BuffaloWeather said:

Last few frames of rgem are similar to euro so I wouldn’t get your hopes up yet 

I’m not. But when the NWS puts it in the HWO and local stations are bringing it up already, I’d say that’s a good signal…I also like the post from LEK right above me with optimism as well…

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This Hazardous Weather Outlook is for portions of western New York.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Much colder air following the passage of a strong cold front
Wednesday afternoon will bring about the possibility of accumulating
lake snows to the Buffalo Metro area Wednesday evening into
Thursday.
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