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1/27/12 SWFE Discussion


Baroclinic Zone

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00z NAM is very close here... snow to mixed but we live for another model run up here in the northern tier. This will likely trend further NW though I'm afraid. As Will said, it has all the looks of a classic doesn't-stop-trending-NW till 12 hrs prior to storm.

Watch this eventually go over ART.

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00z NAM is very close here... snow to mixed but we live for another model run up here in the northern tier. This will likely trend further NW though I'm afraid. As Will said, it has all the looks of a classic doesn't-stop-trending-NW till 12 hrs prior to storm.

Watch this eventually go over ART.

Surprisingly negative there PF ;)

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Euro was a torch.

Other than some icing, this event looks pretty ugly...nothing really to stop it trending NW...high is not a good location, and we have some phase potential to rip this well west. Still have to watch for some pseudo-CAD, but overall the synoptics are quite lousy for significant snow...even for most of NNE. The hope is that the southern stream stays mostly out of it like the GFS shows and that would keep it colder...esp for NNE. But its kind of on its own right now.

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I checke my new zone before coming in here. Now reading this I'm like....huh?

MERRIMACK-

INCLUDING THE CITIES OF...CONCORD...HOOKSETT

532 AM EST WED JAN 25 2012

.TODAY...PARTLY SUNNY. HIGHS IN THE MID 30S. NORTHWEST WINDS 10 TO

15 MPH.

.TONIGHT...MOSTLY CLOUDY IN THE EVENING...THEN BECOMING PARTLY

CLOUDY. LOWS AROUND 17. NORTHWEST WINDS AROUND 10 MPH.

.THURSDAY...MOSTLY SUNNY. HIGHS IN THE MID 30S. LIGHT AND VARIABLE

WINDS.

.THURSDAY NIGHT...SNOW OR SLEET. HEAVY SNOW ACCUMULATION. LOWS IN

THE MID 20S. LIGHT AND VARIABLE WINDS. CHANCE OF PRECIPITATION

80 PERCENT.

.FRIDAY...RAIN LIKELY OR SLEET OR SNOW LIKELY. ADDITIONAL LIGHT SNOW

ACCUMULATION. HIGHS AROUND 40. LIGHT AND VARIABLE WINDS...BECOMING

NORTHWEST AROUND 10 MPH IN THE AFTERNOON. CHANCE OF PRECIPITATION

80 PERCENT

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and hpc sounds good up here too. thump snow with a mix at the end?

UPPER OHIO VALLEY...NORTHERN MID ATLANTIC STATES AND NEW

ENGLAND...

SLOW-MOVING SOUTHERN STREAM SYSTEM MIGRATES NORTHEASTWARD ACROSS

THE OHIO VALLEY AND MID ATLANTIC REGION...WITH COLD HIGH PRESSURE

ANCHORED IN ACROSS THE NORTHEAST AND NORTHERN MID ATLANTIC STATES.

INITIALLY...WARM ADVECTION PRECIPITATION SHIELD SPREADS ACROSS THE

COLDER AIRMASS...LEADING TO A WINTRY MIX OF SLEET AND FREEZING

RAIN ALONG WITH LIGHT SNOW THURSDAY MORNING...BEFORE TURNING BACK

OVER TO RAIN ALONG AND IMMEDIATELY BEHIND THE BROADENING WARM

FRONT. AS THE SURFACE CYCLONE DEEPENS AND ALOFT...JET-LEVEL

DYNAMICS INTENSIFY ALONG AND AHEAD OF THE COLD FRONT...A BROAD

MATURE CYCLONE EMERGES IN THE NORTHERN MID ATLANTIC REGION...WITH

DEEP-LAYERED WARM ADVECTION FROM THE CAROLINAS SPREADING NORTHWARD

INTO THE NORTHEAST AND ATOP THE MODIFIED SURFACE RIDGE.

PROBABILITY GRAPHICS FOR SIGNIFICANT SNOWFALL FAVORED THE HIGHER

TERRAIN OF THE NORTHEAST...NEW ENGLAND...AND MUCH OF MAINE...WITH

A CYCLONE TRACK THROUGH THE GULF OF MAINE ON FRIDAY NIGHT AND

SATURDAY MORNING.

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HPC and GYX seem to think the cold air/high holds on long enough

I'd hedge more ice there than snow...the mid-levels have been trending warmer. The GFS is an outlier in how it evolved the storm. Its the only model that doesn't phase the southern stream. There should still be some snow at the beginning for NNE, but it doesn't look like a significant snow.

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