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Possible Noreaster Event Oct 18/19


SmokeEater

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The implementation was delayed, was initially suppose to occur in July. I've just read its overall better. They are also going to be dropping some of the ancient rsm and eta members of the sref in the not too distant future also. A closer to 4dvar gfs is suppose to start in 2012.

Thank you sweet Jesus.

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its going to be interesting to see which computer model is correct. The gfs is by far the most mundane of them all with .25 of qpf. The euro each run has been ticking down the rain, with the latest 12z run showing .75-1 from the del river on east. While the nam and the ggem are the most agressive.

There are just too many t-cells on the radar to say it is all virga that will hit us. Those in the SE region have had the virga and light showers but we will experience the Tenn Valley T-cells by the time the moisture from the Carolina reaches us. Frankly, the model with the most moisture may win this time

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And so it begins... The 1st of many model battles. WHO WIL BE VICTORIOUS?!?! I'll place my money on the euro. Nam seems a little bullish, and gfs too shy. I wonder if the nam is trying to develop a convective cluster , hence the elevated precipitation totals to the west/I-95 corridor and a more moderate isentropic rain falls over shore points?

On ny iPhone @work, so don't have time/tools to look over the models.

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its going to be interesting to see which computer model is correct. The gfs is by far the most mundane of them all with .25 of qpf. The euro each run has been ticking down the rain, with the latest 12z run showing .75-1 from the del river on east. While the nam and the ggem are the most agressive.

This really isn't surprising...NAM/GG are typically more "bullish" on rainfall.

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DAY 1 CONVECTIVE OUTLOOK CORR 1

NWS STORM PREDICTION CENTER NORMAN OK

0117 AM CDT WED OCT 19 2011

VALID 191200Z - 201200Z

...THERE IS A SLGT RISK OF SVR TSTMS ACROSS THE MID-ATLANTIC

STATES/DELMARVA/NC...

CORRECTED FOR MINOR WORDING

...CAROLINAS/MID-ATLANTIC STATES/DELMARVA/PA...

THE BRUNT OF A BROAD/DEEP LONGWAVE TROUGH WILL GENERALLY SHIFT

EAST-NORTHEASTWARD FROM THE LOWER/MIDDLE MS RIVER VALLEY TOWARD THE

OH VALLEY/APPALACHIANS THROUGH TONIGHT. INITIALLY TODAY...SEVERE

POTENTIAL WILL BE FOCUSED ACROSS AREAS SUCH AS THE COASTAL

CAROLINAS...WHERE STRONG/MODESTLY VEERING LOW/MID TROPOSPHERIC FLOW

WILL COINCIDE WITH AN INLAND DEVELOPING MOIST/UNSTABLE NEAR-COASTAL

AIRMASS. IN THIS CASE...CONCERN EXISTS INTO THE MIDDAY HOURS FOR THE

POSSIBILITY OF SUPERCELLS CAPABLE OF A TORNADO OR TWO AS WELL AS

DAMAGING WINDS MAINLY FOR COASTAL AREAS.

INTO THE UPSTATE CAROLINAS/MID-ATLANTIC REGION AND A BIT LATER

TODAY...POTENTIAL FOR STRONG/SEVERE TSTMS IS EXPECTED TO INCREASE

THIS AFTERNOON/TONIGHT AS A MOIST INFLUX CONTINUES AND THE PARENT

CYCLONE UNDERGOES A DEEPENING PHASE/BECOMES NEGATIVELY TILTED. WHILE

A SHALLOW NEAR-SURFACE STABLE LAYER MAY TEND TO PERSIST ACROSS THE

REGION AND DESTABILIZATION SHOULD OTHERWISE REMAIN

MODEST...PRONOUNCED HEIGHT FALLS/DPVA AND DRAMATICALLY STRENGTHENING

DEEP LAYER SOUTH-SOUTHWESTERLY FLOW PROVIDES CONCERN FOR THE

DEVELOPMENT OF A LOW-TOPPED/FAST-MOVING CONVECTIVE LINE IN VICINITY

OF AN EAST-NORTHEASTWARD ACCELERATING COLD FRONT FROM MID/LATE

AFTERNOON THROUGH TONIGHT. EVEN WITH RELATIVELY MODEST

BUOYANCY...THE DEGREE OF FORCING/VERTICAL SHEAR MAY YIELD SOME

SUPERCELLS /ESPECIALLY EARLY IN THE CONVECTIVE CYCLE/ ASIDE FROM THE

EVOLUTION OF A FAST-MOVING CONVECTIVE LINE WITH EMBEDDED BOWS. IN

THIS SCENARIO...DAMAGING WINDS/POSSIBLE TORNADOES AND PERHAPS SOME

HAIL WILL BE POSSIBLE...WITH THE RELATIVELY GREATEST POTENTIAL

EXPECTED TO SPREAD/INCREASE FROM CENTRAL/NORTHERN NC INTO CENTRAL

VA/MD THIS AFTERNOON/EVENING. AT LEAST A MARGINAL/ISOLATED DAMAGING

WIND THREAT COULD VERY WELL CONTINUE WELL THROUGH THE NIGHT INTO

PORTIONS OF PA/DELMARVA AND EVEN SOUTHERN NY.

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surprisingly, under those heavy bands near you, the QPF is only ~0.3" an hour. I will say though that the representation on radar of the axis is not at all what the models have depicted over the last several days. I haven't seen them all, but none had the WSW-ENE orientation.

Those bands aren't really as heavy as the radar is showing. Using GR2AE, highest dbz showing up is 40. Light to moderate rain at the most imo.

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