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November 2013 obs and discussion


usedtobe

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Looks like maybe one more warm up before the cold takes over. 12Z GFS unleashes the polar bears. 12Z CMC looked interesting at 240 for a coastal. 

 

Of rain

 

Even if this were to be exact -- http://meteocentre.com/models/explorateur.php?lang=en&map=na&run=12&mod=gemglb&stn=PT&comp=1&run2=12&mod2=gemglb&stn2=PT&hh2=228&fixhh=1&hh=240 A 1030 H won't do much to lock in cold air and we would switch over.  Its nice to see a coastal show-up anyway though

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Of rain

 

Even if this were to be exact -- http://meteocentre.com/models/explorateur.php?lang=en&map=na&run=12&mod=gemglb&stn=PT&comp=1&run2=12&mod2=gemglb&stn2=PT&hh2=228&fixhh=1&hh=240 A 1030 H won't do much to lock in cold air and we would switch over.  Its nice to see a coastal show-up anyway though

 

Cold air is starting to push in. Still pretty close. Also at 240 so who cares exactly.

 

cmc_pr6_slp_t850_east_41.png

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.LONG TERM /SUNDAY NIGHT THROUGH FRIDAY/...
A NEGATIVELY TILTED TROUGH WILL BE DIGGING INTO IN/OH SUNDAY
EVENING. A DEEP AREA OF LOW PRESSURE WILL BE CENTERED NEAR NRN MI
WITH A COLD FRONT EXTENDING ACROSS THE OHIO VALLEY. THE MID ATLANTIC
WILL BE IN THE WARM SECTOR FOR THE START OF THE LONG TERM PERIOD.
WINDS WILL BE INCREASING AS A STRONG 50-60KT LLJ APPROACHES THE
REGION. BY MIDNIGHT MONDAY THE LLJ MAX WILL BE MOVING OVERHEAD.
STRONG MOISTURE ADVECTION WILL BE TAKING PLACE FROM THE GULF COAST
AND PWAT VALUES SHOULD INCREASE TO NEAR 1.5 INCHES WHICH IS NEAR
2SD ABOVE NORMAL FOR MID NOV. SFC DEWPTS ARE EXPECTED TO RISE INTO
THE MID 50S EARLY MONDAY MORNING. MOISTURE ADVECTION WILL BE THE
MAIN SOURCE OF LIFT IN THE WARM SECTOR LATE SUNDAY NIGHT AND EARLY
MON MORNING AND SHOWERS SHOULD INCREASE FROM SW TO NE AHEAD OF THE
SFC COLD FRONT. LOCALIZED HEAVY DOWNPOURS WILL BE POSSIBLE. A WARM
NOSE OF AIR AS PART OF THE LLJ WILL BE PRESENT ALOFT AND RESULT IN
A STABLE LAYER. 50-60KT WINDS WILL BE RIGHT ABOVE THIS STABLE
LAYER AND SHOWERS WILL HAVE THE CAPABILITY TO MIX THESE WINDS
DOWN. FCST SOUNDINGS ALSO SHOW ELEVATED INSTABILITY OF A FEW 100
J/KG OF CAPE WHICH WILL INCREASE THE CHANCE OF DOWNDRAFTS AND
THEREFORE LOCALLY DAMAGING WIND GUSTS EARLY MONDAY MORNING.

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GFS sort of interesting end of next week. See something of a damming sig there

I'm more interested in the period after next weekend. It looks to be the earliest that a favorable w ridge moves in. Potential (albeit slim) for some sort of clipperish vort or tail on the front after the bigger storm in front rains on us.

Euro ens still likes a western ridge in the same general time frame. If nothing else, its a general pattern worth keeping an eye on even if the calendar say "lolz at bob chill"

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