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Jan 23/24 Major Coastal Storm Discussion


Zelocita Weather

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WPC 

 

A PERSISTENT POSITIVE 500 HPA HEIGHT ANOMALY NEAR SOUTHERN HUDSON
BAY AND A NEGATIVE 500 HPA HEIGHT ANOMALY NEAR 45N 145W THROUGH
THE MEDIUM RANGE PERIOD SUPPORT EACH OTHER, AS WELL AS THE
OCCASIONAL SPLIT IN THE UPPER LEVEL FLOW NEAR THE WEST COAST OF
NORTH AMERICA AND THE PROGRESSION OF A CLOSED 500 HPA LOW NEAR 37N
ACROSS THE EASTERN PORTION OF THE CONTINENT, WHICH LEADS TO A
TENDENCY FOR A MULTI-DAY MEAN TROUGH NEAR THE SOUTHEAST COAST.
THE GUIDANCE SUPPORTS THESE IDEAS AND ARE IN VERY GOOD AGREEMENT,
EVEN WITH MANY DETAILS OF THE FORECAST. FROM THURSDAY INTO
SATURDAY, USED A FAIRLY EVEN COMPROMISE OF THE 00Z CANADIAN/00Z
UKMET/06Z GFS/00Z ECMWF, WHICH DEALT WITH PROBLEMATIC ASPECTS WITH
THE FORECAST NEAR THE EAST COAST AS WELL AS THE NORTHWEST. IN
PARTICULAR, THIS EFFECTIVELY DEALS WITH KNOWN ECMWF BIASES (SLOW)
IN THE 72-132 HOUR FORECAST TIME FRAME OUT EAST (WHICH THIS TIME
WERE SUPPORTED BY ITS OWN 00Z ENSEMBLE SPREAD AND MEAN). AS AN
ALTERNATIVE, THE 06Z GFS/NORTHWARD ADJUSTED 12Z UKMET OR ANY OF
THE AVAILABLE ENSEMBLE MEANS (06Z GEFS, 00Z NAEFS, 00Z ECMWF)
WOULD ALSO BE REASONABLE.

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A storm like models have locked onto would likely support blizzard conditions areawide. The GFS had 30 knot or higher winds well inland.

 

JM 12 + plus hours of 30+ knot sustained with 50 knot gusts  with about 2 inches of liquid . 

 

Looks like a 24 hour event in total . 

 

Long event at your old stomping grounds .  You flying back if this holds through Wed ? 

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I wouldnt be shocked if they issue blizzard watches for the area.

 

 

Not this early brother

Sent from my SAMSUNG-SM-N910A using Tapatalk

 

 

Wednesday night if all holds serve.

 

 

Even that could be a bit soon

 

 

No, watches typically go up 48hrs before onset.

 

If the storm continues to evolve as is currently depicted by the models then watches would most likely be issued either with the Wednesday afternoon or Thursday morning forecast package. Warnings would most likely be issued either Thursday afternoon or Friday morning.

 

http://www.noaanews.noaa.gov/stories/s794c.htm

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Probably the greatest superkara block assist of all time if these day 5 progs verify close to

what is being shown.

http://www.cpc.ncep.noaa.gov/products/intraseasonal/z500_nh_anim.shtml

Which is why the upper air pattern would support this storm. The AO is still negative and with it rising over the next several days it helps with the robust storm signal.

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Trying my hardest NOT to weenie here, but I've never seen this much agreement, this far out... Ops, ensembles etc...it's quit insane

Exactly what I was thinking, remarkable considering the lack of consistency over past few years.  Non Miller B's seem to be picked up earlier and with somewhat higher agreement.

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Trying my hardest NOT to weenie here, but I've never seen this much agreement, this far out... Ops, ensembles etc...it's quit insane

If it still looks like this at 0z it's time for everyone to bite. I'll admit right now, I think my view of this possibly being suppressed is probably wrong, the EPS was pretty incredible
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