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March 25-26 Potential Bomb Part II


earthlight

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Doug, I assume it occludes around my latitude?

 

Looks like it to me...looks occluded at hour 114. 

 

The precip "tug" to the west is most significant between hours 96 and 108 -- after that, the low begins to occlude and the precip shield narrows. 

 

If anything, the low slowly drifts eastward (well, just north of due east) between 108 and 114...so it may actually occlude south of your latitude, Ray. 

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I actually fell asleep but my internal alarm clock woke me up. If your body is waking u up for the Eueo It could be time to see a specialist for this! ( loving the tick west after the GFS and GEfs ..LOL. I think tomorrow could be the start a beautiful friendship with this increasingly sexy beast!

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Looks like it to me...looks occluded at hour 114. 

 

The precip "tug" to the west is most significant between hours 96 and 108 -- after that, the low begins to occlude and the precip shield narrows. 

 

If anything, the low slowly drifts eastward (well, just north of due east) between 108 and 114...so it may actually occlude south of your latitude, Ray. 

Thanks, Doug.

 

This is why I hate Miller As, but too early to sweat those details.

 

At least its not over Bermuda.

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37 MB drop in 12 hours is pretty insane . !!! A bomb like this will need to be watched all the way to inside 48 hours.

We said 12z sat the surface obs data should be absorbed , so we should get a clearer picture this afternoon.

Details will not shake out until we are inside 72 hours , so just look for a general trend today IMO.

But all in all you are watching a bomb unfold , even if its not in you're backyard. Yet!

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37 MB drop in 12 hours is pretty insane . !!! A bomb like this will need to be watched all the way to inside 48 hours.

We said 12z sat the surface obs data should be absorbed , so we should get a clearer picture this afternoon.

Details will not shake out until we are inside 72 hours , so just look for a general trend today IMO.

But all in all you are watching a bomb unfold , even if its not in you're backyard. Yet!

We shall see. Pattern has been against our side this past month but this one looks to be more interesting. If 12z starts the trend westward, then this place will blow up! To have a storm THIS powerful 4 days out in March is quite interesting - regardless of the outcome! 

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The only thing that leads me to believe that this could come further west is the NOGAPS because it is further west at 96 hrs then the other guidance and with the models progressive bias it should be further south and east...

Check out the QPF differences from 12z to 0z on the euro on Long Island into central Monmouth county and even into NYC

That's a very nice jump west.

One more step west and many are in the game. That's a bomb , so QPF maps are the least of my worries right now.

You tick that west again and you are talking something not seen here this late since April 82

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As always, thanks for the pbp folks - we're close to something special, but not quite there yet. More than a few folks reflexively comparing this storm to the last two that missed most in this forum, on 3/3 and 3/17, due to suppression and predicting the same this time because we'll have an anomalously strong cold high pressure building into the area with this storm. In addition to recognizing that it's kind of hard to not have snow in late March without a pretty damn anomalous-looking polar high, I think people tend to forget that we have that in most snowstorms, where the synoptics simply work out right to drive a storm into that cold air. I really like the way Upton described that yesterday afternoon...

THIS IS A DIFFERENT SCENARIO FROM A COUPLE OF PREVIOUS STORMS THAT

ENDED UP BEING SUPPRESSED TO THE SOUTH BY CONFLUENCE AND STRONG HIGH

PRESSURE BUILDING IN FROM THE NORTH. INSTEAD...IF THIS IS A COMPLETE

MISS...IT WILL PROBABLY HINGE MORE ON THE TIMING AND DEGREE OF

PHASING OF SHORTWAVE ENERGY EMERGING FROM THE PAC NW REGION...

http://forecast.weather.gov/product.php?site=NWS&issuedby=OKX&product=AFD&format=CI&version=1&glossary=1&highlight=off

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NWS-Philly AFD is out and it's encouraging...Upton's "new" AFD is out, but it's the same text as the 4 pm package in the long term (a little confused on that), an excerpt of which I just postd above.

.LONG TERM /SUNDAY THROUGH FRIDAY/...

THE MODELS DID NOT BACK OFF, IN FACT BECAME MORE BULLISH, WITH

THE OFFSHORE LOW FOR TUESDAY AND TUESDAY NIGHT. ANYONE WHO HAS

PLANS THAT WILL BE AFFECTED BY ADVERSE WEATHER TUESDAY/WEDNESDAY ARE

ADVISED TO FOLLOW THE TRACK OF THIS LOW IN THE DAYS AHEAD. THIS

COULD VERY WELL BRING MULTI FACETED CONCERNS FROM HEAVY SNOW TO

WINDS AND TIDAL FLOODING.

THE GFS AND ECMWF INITIALIZATION DIDNT IMPRESS AND WHILE THE ERRORS

WERE NOT BLATANT, THERE WERE MULTIPLE 10-20M ONES IN CANADA AND

ALASKA CENTERED ON THE REX RIDGE BEING STRONGER AND RIDGING ENTERING

BC. THE SIGNIFICANT SHORT WAVES ARE ENTERING THE DENSER RAOB

NETWORKS AND WE WILL HAVE TO WATCH THE NEXT ONE TO TWO SOUNDING

RUNS TO SEE IF THE 00Z TREND TOWARD MORE AMPLIFICATION CONTINUES.

THERMALLY AND CLOSER TO HOME A WRF-NMMB AND GFS BLEND SEEMED TO

INITIALIZE THE BEST.

FOR THIS PACKAGE TO IRON OUT THE DIFFERENCES BETWEEN THE FASTER AND

SLOWER TO AMPLIFY GFS AND THE 32 MILLIBAR/12 HOUR DEEPENING WITH

THE ECMWF, WE HAVE OPTED TO GO CLOSE TO THE CAN GGEM SOLUTION.

THIS IS CLOSER TO THE LATTER AND GEOGRAPHICALLY SPLIT THE TRACK

DIFFERENCE. THE GEM HAS DONE PRETTY WELL WITH OUR WINTER WEATHER

SYSTEMS THIS MONTH AND THE MODEL RUN ITSELF LOOKED MORE CONSISTENT

CONVECTIVELY AND OTHERWISE. FOR THAT FACT ALL OF THE MEDIUM RANGE

MODELS DID. THE GEFS ENSEMBLE MEAN LOOKED TOO WEAK AND SE AGAIN

WHILE THE CAN GEPS ENSEMBLE MEAN LOOKED MORE TIGHTLY CLUSTERED

AROUND THE OP RUN.

http://forecast.weather.gov/product.php?site=NWS&issuedby=PHI&product=AFD&format=CI&version=1&glossary=1&highlight=off

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And how can a weenie not like the WPC discussion? Going to be a close call for this forum, but I assume the eastern LI/SE New England folks are starting to really get excited...

EXTENDED FORECAST DISCUSSION

NWS WEATHER PREDICTION CENTER COLLEGE PARK MD

112 AM EDT SAT MAR 22 2014

VALID 12Z TUE MAR 25 2014 - 12Z SAT MAR 29 2014

...NOR'EASTER TO BOMB OFF THE MID-ATLANTIC COAST LATE TUESDAY...

THE CROSS-POLAR FLOW WHICH HAS PERIODICALLY REACHED INTO NORTH

AMERICA SINCE JANUARY SEEMS DESTINED FOR AT LEAST ONE MORE

TRANSPORT OF ARCTIC AIR INTO MUCH OF THE CENTRAL AND EASTERN

UNITED STATES TUESDAY. WITH HEIGHTS STILL LOW ACROSS THE EAST IN

THE WAKE OF THE COLD BLAST DURING SUNDAY AND MONDAY IN THE SHORT

RANGE, THE STAGE WILL BE SET FOR ANOTHER ROUND OF SNOW AND ICE

WITH THE CLIPPER SYSTEM HERALDING TUESDAY'S OUTBREAK. IT SEEMS

THAT THE CLIPPER WILL GAIN ENOUGH AMPLITUDE TO SIPHON SOME

SUBTROPICAL MOISTURE AND ENERGY CROSSING THE SOUTHEAST FROM THE

GULF OF MEXICO EARLY TUESDAY. MOST OF THE GLOBAL NUMERICAL MODELS

INDICATE THAT THE SLIGHT NEGATIVE-TILT TO THE CLIPPER WILL SET UP

A DUMBBELLING WITH THE GULF ENERGY TOWARD EVENING TUESDAY

SOMEWHERE OFFSHORE BETWEEN CAPE HATTERAS AND THE ATLANTIC

"BENCHMARK" OF 40N/70W. THIS BINARY INTERACTION--OR FUJIWHARA

EFFECT--IS A PARTICULARLY ENERGIZING PHENOMENON. BY EARLY

WEDNESDAY MORNING, A SUB-970MB SURFACE CYCLONE IS LIKELY NEAR THE

BENCHMARK AFTER THE BOMBING PHASE. HOW FAR SOUTHWEST THE BOMBING

OCCURS IS CRITICAL FOR THE SENSIBLE WEATHER FROM THE CAROLINAS TO

NEW ENGLAND. THE EARLIER/FARTHER SOUTHWEST, THE GREATER THE

CHANCES FOR SIGNIFICANT WINTER WEATHER FROM THE CAROLINAS AND

SOUTHERN MID ATLANTIC ALL THE WAY THROUGH MAINE. IF THE BOMBING IS

LATER/FARTHER NORTHEAST, EASTERN NEW ENGLAND WOULD SUFFER THE

WORST EFFECTS. EITHER WAY, WINDS LOOK REMARKABLY STRONG ON THE

WEST AND SOUTH SIDE OF THE TIGHT CIRCULATION TUESDAY NIGHT INTO

EARLY WEDNESDAY--A MAJOR CONCERN FOR COASTAL AND OFFSHORE

INTERESTS FROM EASTERN LONG ISLAND TO DOWN EAST MAINE.

http://www.wpc.ncep.noaa.gov/discussions/hpcdiscussions.php?disc=pmdepd

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