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Tulip Trouncer Threat IV


Baroclinic Zone

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He also said I did indeed taint around hour 30 on the euro..but still came in with 10 inches.

5-9 is my call. Unlss the Euro changes drastically today. if it doesn't..That's my final call

It will be important to see what the GFS does. It's been on the colder side of things. If it shoots warm thats a problem.

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12z NAM is colder of BOS...

It also has large QPF numbers for that location. What is actually going on here is that it is narrowed the impact region.

Where it doesn't fall hard there will be p-type issue. But places like BED in Mass to ORH and 20 miles or so W of that axis look to get dumped on with this solution.

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I'm not too worried about the NAM to be honest. It is the NAM afterall.

The first thing that came to my mind is the song "Stand by your man" but substitute NAM and belt out..."CAUSE AFTER ALL...IT'S JUST THE NAM" in place of "CAUSE AFTER ALL...HE'S JUST A MAN.."

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12z NAM is colder of BOS...

It also has large QPF numbers for that location. What is actually going on here is that it is narrowed the impact region.

Where it doesn't fall hard there will be p-type issue. But places like BED in Mass to ORH and 20 miles or so W of that axis look to get dumped on with this solution.

Looks like you are also a fan of FOUS. I use it immediately to get the big picture of the output.

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Agreed. Wonder why HPC doesn't think those initialization errors could be throwing the NAM off.

MODEL DIAGNOSTIC DISCUSSION

NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD

1050 AM EDT THU MAR 31 2011

ANY INITIALIZATION ERRORS WITH THE NAM DO NOT APPEAR TO

SIGNIFICANTLY IMPACT ITS SOLUTION.

...CYCLONE LIFTING UP THE EASTERN SEABOARD DAY 1...

THE NAM HAS TRENDED SLIGHTLY OFFSHORE WITH THE TRACK OF THIS

WAVE...AND LESS INTENSE WITH THE ULTIMATE DEPTH OF THE CYCLONE

OVER THE GULF OF MAINE. THE NAM IS SLOWER THAN THE 00Z/31 ECMWF

TO PHASE THE ENERGY ALONG THE SOUTH CAROLINA COAST INTO THE

INITIAL WAVE OFF THE MID ATLANTIC COAST...WHICH DELAYS THE RAPID

DEEPENING PHASE.

Looks like there were initialization errors with the 12z NAM

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I'm not too worried about the NAM to be honest. It is the NAM afterall.

But that said it, the GFS, and you could even argue the EC has been indicating the CCB from Like NNJ up thru the Catskills towards the S'rn greens/N'rn Berkshires. IMO none of the models have wavered on this. (BTW - I'm agreeing with your forecast). The other issue is that everybody is saying NAM is east. What the nam is showing is a TP redevelopment thus it looks like its further east when IMO it isn't. You have the occlusion over LI/SE NE warm air aloft wrapping in. The cold air is back to the West and North of the Ct river Valley.

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there were...southern shortwave not deep enough in Missouri and IL. Did NCEP comment on it?

Yeah, but they said it did not appear to be consequential. I understand how they test that, but IMO it's still a load of BS. If the s/w was under represented there would of course be ramification into the forecast

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..UPDATE AT 910 AM... THE 06Z GFS IS COLDER THAN THE PREVIOUS

RUN AND THE 00Z ECMWF 850-700 MB 1540 LINE IS A TAD COLDER THAN

THE 00Z GFS. THIS HAS BIG IMPLICATIONS FOR AREAS IMMEDIATELY EAST

OF OUR CURRENT SNOW/RAIN LINE. AS A RESULT...AM UPPING SNOW

AMOUNTS FOR EASTERN HAMPDEN...EASTERN HAMPSHIRE...AND MIDDLESEX

COUNTIES IN MA AS WELL AS SOUTHERN HILLSBOROUGH COUNTY IN NH...AND

HARTFORD AND TOLLAND COUNTIES IN CT. NAM 2M TEMPS DROP TO THE LOW

TO MID 30S IN THOSE AREAS AFTER THE PRECIPITATION BEGINS IN

EARNEST THIS EVENING...WHICH IS ABOUT 3 DEGREES COLDER THAN

CURRENT GRIDS REFLECT. THIS WILL NECESSITATE THE EXPANSION OF

ADVISORIES ABOUT ONE TIER EASTWARD.

from boston at 9 am

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It will be important to see what the GFS does. It's been on the colder side of things. If it shoots warm thats a problem.

Ryan, you've done a great job analyzing this system. A lot of people...even down to the coast...even here are/have been expecting snow. In order to get good snow this time of year the moon and the stars have to align perfectly and it just aint happening. Nobody should be surprised. The final third of this season beyond February 2nd has been terrible and not even the weather equivalent of Karl Rove can spin this any other way. When's it supposed to warm up??

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But that said it, the GFS, and you could even argue the EC has been indicating the CCB from Like NNJ up thru the Catskills towards the S'rn greens/N'rn Berkshires. IMO none of the models have wavered on this. (BTW - I'm agreeing with your forecast). The other issue is that everybody is saying NAM is east. What the nam is showing is a TP redevelopment thus it looks like its further east when IMO it isn't. You have the occlusion over LI/SE NE warm air aloft wrapping in. The cold air is back to the West and North of the Ct river Valley.

Yup. The Euro especially delivered most of its snow in the CCB that cranked during the day tomorrow. I think it's probably totally overdone with that.

And yes about the NAM. It's strung out and is a mess aloft which winds up sucking in all sorts of warmth.

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Ryan, you've done a great job analyzing this system. A lot of people...even down to the coast...even here are/have been expecting snow. In order to get good snow this time of year the moon and the stars have to align perfectly and it just aint happening. Nobody should be surprised. The final third of this season beyond February 2nd has been terrible and not even the weather equivalent of Karl Rove can spin this any other way. When's it supposed to warm up??

Yeah no snow at the coast. Socks is running around in his socks telling people in the Bronx they're getting big snow but most people on the shore should know by now they're getting nothing.

Winter ended 2/2 oh well.

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But that said it, the GFS, and you could even argue the EC has been indicating the CCB from Like NNJ up thru the Catskills towards the S'rn greens/N'rn Berkshires. IMO none of the models have wavered on this. (BTW - I'm agreeing with your forecast). The other issue is that everybody is saying NAM is east. What the nam is showing is a TP redevelopment thus it looks like its further east when IMO it isn't. You have the occlusion over LI/SE NE warm air aloft wrapping in. The cold air is back to the West and North of the Ct river Valley.

tend to agree there. been pretty consistent in that general theme. issues further east have been more regarding subtle shifts in thermal profiles. problem for areas that end up outside the good comma head snows could be lackluster ratios/snow growth given a awfully marginal 10K feet or so.

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Wow our in-house model has really cut back since last night. Horrible. 6-10" in the Berks and north of ORH. Less than an inch BOS. Nothing CEF/BDL/HFD.

Similar on ours too. has some heavy rain BDL/HFD south and east alongthe Pike to BOS. Even ORH looks to at least mix with rain if not go over

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