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11/7 Noreaster Thread


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Mt Holly disco:

.LONG TERM /SUNDAY NIGHT THROUGH SATURDAY/...

RECOVERY RESCUE OFFICIALS SHOULD BE PREPARED FOR A HAMPERING IF

NOT RETROGRADING OF RESTORATION EFFORTS ON WEDNESDAY AND THURSDAY AS

A LIKELY NOR`EASTER MOVES UP THE COAST. ADVISORY LEVEL WINDS (ESP

EAST) AS WELL AS MINOR TO MODERATE TIDAL FLOODING APPEAR POSSIBLE.

HEAVY RAIN AND EVEN SOME SNOW INLAND SNOW WOULD NOT BE A SHOCKER.

PLEASE REFER TO OUR BRIEFING PACKAGE FOR MORE DETAILS. OUR WEB

SITE LINK REMAINS DEGRADED AND THE SUMMARY STATEMENT OF THE

BRIEFING PAGE CAN BE SEEN ON OUR FACEBOOK AND TWITTER PAGES.

WE WISH IT WAS DIFFERENT ESPECIALLY IN LIGHT OF THE DEVASTATION

FROM SANDY, BUT THE DOUBLE TELECONNECTION PATTERN CHANGE SWITCH

OF THE NAO AND PNA SUPPORTS THE TRENDING MORE VIGOROUS NOR`EASTER

SOLUTION WE ARE NOW SEEING WITH ALL OF THE MODELS.

THE ECMWF HAS TRENDED EASTWARD FROM YESTERDAY AND THE GFS HAS

FINALLY SETTLED ON A MORE WESTWARD PLACEMENT THAT IT STARTED WITH

THE 18Z RUN YESTERDAY. MOST OF THE ENSEMBLE MEMBERS OF THE GFS ARE

EAST OF THE OPERATIONAL RUN, A CHARACTERISTIC WE ARE GLEANING OFF OF

ALL OF THE OTHER MODEL ENSEMBLE MEANS. AT THIS JUNCTURE THIS IS A

NATURAL (LATER PHASING. MORE PROGRESSIVE) PLACEMENT OF LOWER

RESOLUTION MEMBERS. THE ECMWF PHASES SOONER AND THUS PROLONGS THE

ONSHORE FLOW LONGER AS THE LOW STALLS/SLOWS AT A LOWER LATITUDE. FOR

THE OUTSTANDING JOB THAT THE ECMWF DID WITH SANDY IN DAYS 3-7, THERE

WAS A LEFT OF TRACK BIAS ON SOME OF THE RUNS WITH SANDY. GIVEN WE

ARE STILL FOUR DAYS AWAY, WE HAVE GONE WITH THE MOST ACCURATE TRACK

COMBO FOR LAST WINTER (A GFS/ECMWF COMPROMISE).

LEADING INTO THE NOR`EASTER CONDITIONS WILL BE CALM, AND

TEMPERATURES WILL AVERAGE COOLER THAN NORMAL. IN FACT SUBFREEZING

TEMPERATURES ARE FORECAST FOR MOST OF OUR CWA AWAY FROM URBAN

CENTERS AND THE COAST. OUR MIN TEMPS ARE A STAT GUIDANCE COMPROMISE.

THERE ARE A COUPLE OF CAVEATS WITH THE MIN TEMPS, THE APPROACHING

SHORT WAVE SHOULD GENERATE SOME CLOUDS. THE GRADIENT ALSO DOES NOT

LOOK TO BE LIGHT AND VARIABLE.

HIGH PRESSURE WILL COME CLOSER TO OUR CWA. COUPLED WITH THE SHORT

WAVE MOVING OFFSHORE, SKIES SHOULD BE SUNNIER MONDAY. AIR MASS

THOUGH IS QUITE CHILLY AND EVEN ON THE COASTAL PLAIN,

WE WILL BE HARD PRESSED TO GET MUCH ABOVE 50F.

IF SUNDAY NIGHT DOES NOT END THE GROWING SEASON, MONDAY NIGHT WOULD.

THE HIGH IS EXPECTED TO CREST ACROSS OUR CWA AND WITH RIDGING ALOFT,

THICKER CIRRUS SHOULD NOT ARRIVE IN TIME. MIN TEMPS ARE PRETTY CLOSE

TO CONTINUITY AND A STAT GUIDANCE COMPROMISE. MANY SUBFREEZING LOWS.

CLOUDS SHOULD BE INCREASING AS TUESDAY PROGRESSES AS THE HIGH MOVES

OFFSHORE AND OUR NOR`EASTER STARTS FORMING ALONG THE GULF COAST. WE

WERE CONSERVATIVE WITH MAX TEMPS BECAUSE OF THE ARRIVAL OF

THE CLOUDS.

IN GENERAL WE DID NOT MAKE TOO MANY CHANGES TO THE SENSIBLE WEATHER

AND WINDS FOR THE APPROACHING NOR`EASTER. THE GFS IS FASTER AND

COLDER THAN THE ECMWF AND WOULD SUPPORT SOME SNOW ACROSS OUR CWA

WHICH IS TIED TO EVAPORATIONAL COOLING AT THE FRONT END AND POSSIBLY

SOME DYNAMICAL COOLING DURING THE EVENT. THE BIGGEST PROBLEMS THOUGH

REMAIN ALONG THE COAST WHERE THE POSSIBILITY FOR MODERATE TIDAL

FLOODING AND WIND ADVISORY GUST LEVELS EXIST. EVEN IF ADVISORY LEVELS

ARE NOT MET ELSEWHERE, IT WILL BE WINDY AND ANY COMPROMISED STRUCTURES,

TREES OR TREE LIMBS MIGHT BE DAMAGED FURTHER OR FALL.

AFTER THE NOR`EASTER PASSES, AT LEAST A BRIEF CHANGE IN THE OVERALL

PATTERN IS EXPECTED. FOR THE REST OF THE LONG TERM, IMPROVING

CONDITIONS WILL OCCUR. THURSDAY COULD BE WINDY WITH LEFTOVER

PRECIPITATION IF THE SLOWER STALLING ECMWF VERIFIES. BEYOND THAT

THERE IS CONSENSUS FOR DRY AND INCREASINGLY MILDER WEATHER ON FRIDAY

AND SATURDAY.

BEYOND OUR DETERMINISTIC FORECAST, THE LATEST NAEFS AND GEFS IS

SHOWING MILDER WEATHER FOR THE ENSUING WEEK. WITH THE OUTLOOK NAO GOING

POSITIVE AND THE PNA GOING NEGATIVE, THIS WOULD ALSO SHIFT THE STORM

TRACK BACK INTO CANADA. IT REMAINS TO BE SEEN IF THIS WILL BE A PATTERN

RELOAD OR LONGER CHANGE IN STORE.

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still no respect for my NAM. sad.png

How many times last winter was the NAM more accurate with colder temps and QPF? ( a lot)

The NAM has its uses, mainly that due to its high resolution if it has the synoptic setup correct, it can nail the thermal profiles and meso scale precip banding better then the global models. However, the problem is, it has to have the larger scale features correct in order for its meso scale features to be depicted correctly and often times it does not. The NAM is only useful at very short lead times and when it agrees with the global models on the general synoptic setup of a storm. Then use it to pinpoint specifics. If the NAM has a different solution synoptically from the other models...its useless.

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The storm is out of the NAM's range. Why would they use it here?

Just regarding last winter in general. It kicked butt in several cold-air damming situations. (I get ur point though)

The NAM has its uses, mainly that due to its high resolution if it has the synoptic setup correct, it can nail the thermal profiles and meso scale precip banding better then the global models. However, the problem is, it has to have the larger scale features correct in order for its meso scale features to be depicted correctly and often times it does not. The NAM is only useful at very short lead times and when it agrees with the global models on the general synoptic setup of a storm. Then use it to pinpoint specifics. If the NAM has a different solution synoptically from the other models...its useless.

It was pretty on-point 84 hours out with Sandy. Decent (and improving) for a non-tropical model.

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Just regarding last winter in general. It kicked butt in several cold-air damming situations. (I get ur point though)

It was pretty on-point 84 hours out with Sandy. Decent (and improving) for a non-tropical model.

within 24hrs deff use the nam for temps and storms. Its high resolution model so it will pick up on the meso affects and CAD situation.

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u mad, bruh ?

Lets not **** this thread up with posts like this, we've got a real danger coming next week down here, and I'd appreciate it if things stayed civilized and on topic. Not complaining that no one gives the NAM love well outside of its wheelhouse, and you mad bruh. We had one of the best subforums during Sandy, the knowledge I got from here was beyond fantastic, and I'd like to keep it that way. I've been in Point Pleasant Beach for the last 24 hours relieving crews here, and there's a real chance these same areas will be inundated again come Wed. There's no dunes or beach left to stop it from happening again.

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18Z GFS brings more pain to the shores of NJ and LI.

850 and 925 mb winds > 60 knots.

This is small comfort, but at least with a synoptic scale system and a nearly isothermal sounding,the mixing wont be as efficient. Then again this low has a bombing rate so doubtful that peak gusts based on the model runs that I saw today would be less than 45 mph along the coast.

As for the nam not having any love, at one time the gfs/nam combination did have the lowest track errors within 72hrs, now its the gfs/euro (during the cold season).

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How does one access the Mt Holly weather briefing for next week's nor'easter on FB or twitter? This comm problem is for the birds lasting this long. The NWS should post these on weather boards like this until their site is up and running again.

A Facebook search nws mount holly will get you there. Our website is down due to issues at Eastern region HQ on Long Island. Hopefully it will be back up soon. We do our best to post all briefing packages to FB and twitter.

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