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Thursday's storm ...Rain, wind, snow and ice?


OKpowdah

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Some great discussion happening with this storm.

Now that we're within 72 hours, I figure we should break off into a new thread ... while treading lightly and hope that we don't tempt fate ;)

I figure I could squeeze this thread in before the 18z GFS ...though Tip already has the early release ;)

Big picture ... not much has changed: Significant trough dropping into the Plains, while a cutoff low sitting over Texas lifts northeast toward New England.

Solid summary from Scott in the last thread, so I'll just quote it here:

The ensembles are the 00z suite will determine perhaps how this trends. We have some good and bad.

Good:

1) stealthy high to the north will help keep the interior cold and create ageostrophic flow

2) Some confluence to our north in the form of a PV lobe.

3) Airmass has some cold punch to it, especially in NNE

Bad:

1) Southern stream system which are notorious for coming north due to physical processes at play.

2) No real good blocking

3) Airmass across SNE is rather tepid and amplfying system across the MIdwest is not helping the mid levels.

You alter any one of these and borderline areas will have a big difference in outcome.

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925 temps and 850 temps regarding the 0C line are just south of ORH at 18z Thursday. Almost in the same area. Meanwhile 700 temps are like -4C at the same time. So there is going to be a pretty good isothermal layer I think. But, with good high pressure to the north, it will help the lower levels anyways. Probably aggregate city for a time, esp ORH north.

I'd like to see 700mb down around -10 where ever the UVM is situated -.

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This system says sleet to me... I just think there'll be more sleet than snow or freezing rain as far as wintery p-types go. Snow growth looks pretty horrible where snow is a possiblity too. I see Tip touched on this with the H7 temps.

Overall this has advisory level snow/sleet at best. I hate seeing winter storm warnings for those 4-7 or 4-8" events... though I bet even jackpot region in this storm is around 6". No closed low and a quick hitter with warm mid levels.

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*PTYPE...

SEEMS WITH THE COOLER TREND IN THE MODELS...MAIN PTYPE WILL BE A MIX

OF SNOW AND RAIN. EXPECT SNOW ACROSS THE INTERIOR AND OVER THE HIGH

TERRAIN...WHILE RAIN WILL OCCUR EAST OF THE I-95 CORRIDOR. HIGHEST

SNOW AMOUNTS WILL BE ACROSS THE NORTHWEST CORRIDOR. IF THIS COOLING

TREND CONTINUES...WE COULD SEE AN INCREASE IN SNOW AMOUNTS.

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What in the sam hell is this all about from BOX??

THE 12Z GFS TRENDED TOWARDS THE 00Z ECMWF KEEPING

IT SOMEWHAT COOL AND NEAR THE BENCHMARK. HOWEVER THE 12Z ECMWF HAS

COME IN A LOT COLDER BUT FATHER INSIDE THE BENCHMARK. WITH THE COOLER

AIR...COULD SEE SNOW ALONG THE I-95 CORRIDOR

Well it could start as snow along parts of the corridor. That statement does seem a little contradictory. Maybe they mean the CAD signature for the interior.

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Will...Any thoughts on the borderline zones down here in N CT?

Northern CT should be snow... In fact, you'd get more snow there than the same latitude in eastern MA -

The title of this thread is amusing to me. What reads "...Rain, wind, (snow and ice?)" the evidences on the table really argues for '...Snow, wind, (rain and ice?)' But ooOOOoooh, no

lol

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What in the sam hell is this all about from BOX??

THE 12Z GFS TRENDED TOWARDS THE 00Z ECMWF KEEPING

IT SOMEWHAT COOL AND NEAR THE BENCHMARK. HOWEVER THE 12Z ECMWF HAS

COME IN A LOT COLDER BUT FATHER INSIDE THE BENCHMARK. WITH THE COOLER

AIR...COULD SEE SNOW ALONG THE I-95 CORRIDOR

Snow is only for people north of the Pike, WOTY.

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Northern CT should be snow... In fact, you'd get more snow there than the same latitude in eastern MA -

The title of this thread is amusing to me. What reads "...Rain, wind, (snow and ice?)" the evidences on the table really argues for '...Snow, wind, (rain and ice?)' But ooOOOoooh, no

lol

Cautionary ;)

But I do agree

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I know it's way outside of its useful time range but SREFs snow probs came way south. Nice hit for NNE and interior northern SNE.

I'm trying to figure out what defines that area......

This looks promising...

1-3" tomorrow and then we'll see what happens late in the week. I think we get mostly shut-out up here (that's fine with me, as long as its not rain)... but I like Dendrite up towards SkierinMaine.

A fine place to be.

*PTYPE...

SEEMS WITH THE COOLER TREND IN THE MODELS...MAIN PTYPE WILL BE A MIX

OF SNOW AND RAIN. EXPECT SNOW ACROSS THE INTERIOR AND OVER THE HIGH

TERRAIN...WHILE RAIN WILL OCCUR EAST OF THE I-95 CORRIDOR. HIGHEST

SNOW AMOUNTS WILL BE ACROSS THE NORTHWEST CORRIDOR. IF THIS COOLING

TREND CONTINUES...WE COULD SEE AN INCREASE IN SNOW AMOUNTS.

The forecast is not exactly in synch with that AFD for GC.

MAZ002-100900-

WESTERN FRANKLIN MA-

INCLUDING THE CITIES OF...ASHFIELD...CHARLEMONT...COLRAIN...

SHELBURNE

415 PM EST MON JAN 9 2012

. .WEDNESDAY NIGHT...SNOW SHOWERS LIKELY. NEAR STEADY TEMPERATURE

IN THE UPPER 20S. EAST WINDS AROUND 5 MPH. CHANCE OF SNOW

60 PERCENT.

.THURSDAY...RAIN AND SNOW SHOWERS LIKELY. HIGHS IN THE UPPER 30S.

CHANCE OF PRECIPITATION 70 PERCENT.

.THURSDAY NIGHT...CLOUDY WITH A CHANCE OF SNOW SHOWERS AND SLEET.

LOWS IN THE UPPER 20S. CHANCE OF PRECIPITATION 40 PERCENT.

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