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3/17-3/18 Storm Threat Discussion


Zelocita Weather

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Look how juiced the 700mb RH field is, this really argues for more moisture to make it further north.

 

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im just hesitant at this time to really buy into the 12z suite in its entirety. literally almost all models made a substantial jump at once and the GGEM probably the most drastic. whether its working out that way or not is yet to be seen

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I wish I could post what the US simulated 4k NAM radar looks like at hour 60. It shows a solid slug of moisture stretching all the way from the Bay of Campeche.

we are still FAR from a final solution I think yanks. the 12z suite might've buried the hatchet for the storm or just confirmed all the models are still having a hard time with this system

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These posts irk me so much. The NAM is a perfectly good model if you know how to read it.

 

People that just want to automatically dismiss it haven't been following weather for very long.

Yes...The interesting thing to me is the NAM has been pretty decent this year and actually had a few semi coups besides a run or 2. IDK I hope is that the models over corrected just like when the gfs shifted north 100 miles with the 3/3 storm before shifting south 300 miles in subsequent runs

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Yes...The interesting thing to me is the NAM has been pretty decent this year and actually had a few semi coups besides a run or 2. IDK I hope is that the models over corrected just like when the gfs shifted north 100 miles with the 3/3 storm before shifting south 300 miles in subsequent runs

The good news is that we should know by the 12z runs tomorrow. Wouldn't shock me if this trended back more favorably.

 

I'm not expecting much out of the 18z GFS. Out of all the models the 18z GFS has the lowest verification scores of all.

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The good news is that we should know by the 12z runs tomorrow. Wouldn't shock me if this trended back more favorably.

 

I'm not expecting much out of the 18z GFS. Out of all the models the 18z GFS has the lowest verification scores of all.

Yea, I just would like to see the PV a little weaker and it a little more progressive with the energy and not trend more in the other direction

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Not sure if its been discussed but I'm curious what the nam does after 84 hrs. SE ridge looks like it might want to try and deflect the surface low North? 850 low looks super...

To me it looks like the 18z NAM would send at least part of that our way. But it's been handling that part of the storm differently on every run.

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BAM. UPTON:

THE 00Z/14 DETERMINISTIC RUNS CONTINUED TO SHOW A NORTHERN TREND IN THE TRACK WHICH CONTINUES TO SUPPORT THE IDEA FROM SUNY SB SENSITIVITY ANALYSIS...HOWEVER TODAYS 12Z MODEL SUITE HAS INTERESTINGLY SHIFTED SOUTH. THIS INCONSISTENCY STEMS FROM THE INTERACTION BETWEEN THE SHORTWAVE TROUGH THAT JUST MOVED ONSHORE IN THE PAC NW AND THE SOUTHERN STREAM TROUGH/CUTOFF LOW OVER THE SW US. DEGREE OF PHASING OF THESE TWO FEATURES...AND EJECTION OF SHORTWAVE ENERGY FROM THIS TROUGH AND THE EVENTUAL PROGRESSION OF THE TROUGH ITSELF...WILL DETERMINE EVENTUAL IMPACTS TO THE AREA. ALSO NEED TO KEEP AN EYE ON THE STRENGTH OF THE CANADIAN HIGH BUILDING IN TO THE NORTH AS IT COULD BECOME THE MAIN PLAYER AND THE MARCH 3RD STORM OR BETTER THE NON-STORM IS STILL IN RECENT MEMORY. THE HIGH DURING THAT EVENT WAS ABOUT 10 MB STRONGER THAN IT IS CURRENTLY FORECAST TO BE FOR THIS ONE.

WHILE THE 00Z/14 GEFS..NAEFS AND EC ENS MEANS ARE IN GOOD AGREEMENT...THE 00Z/14 SENSITIVITY ANALYSIS IS STILL INDICATING A LARGE DEGREE OF SPREAD IN MSLP TO THE N OF EACH OF THE MEAN TRACKS...IMPLYING THAT THE TRACK WOULD BE FURTHER N. THE SENSITIVITY SIGNAL FIRST APPEARS ON LAND AT 00Z/15 AND APPEARS TO BE ASSOCIATED WITH THE SHORTWAVE IN THE PAC NW. WILL BE ABLE TO GAIN SOME BETTER INSIGHT AFTER TONIGHT`S 00Z AND EVEN MORE AFTER TOMORROWS 12Z RUNS NOW THAT THIS SHORTWAVE CAN BE SAMPLED MUCH BETTER BY UPPER AIR OBSERVATIONS. A COMPARISON OF THE AMPLITUDE OF THE H5 FLOW OVER THE ERN PACIFIC OCEAN AND PAC NW CAN BE MADE AS WELL AND DETERMINATION IF THESE NRN TRACK SOLNS ARE PLAUSIBLE OR NOT. THE COLD CANADIAN HIGH PRES BUILDING IN TO THE N WILL PROVIDE THE COLD AIR NEEDED FOR A SNOW EVENT...BUT THIS TOO COULD BECOME QUESTIONABLE ACROSS PORTIONS OF THE AREA IF THE SPREAD IN THE ENS MEANS COMES TO FRUITION.

AM NOT JUMPING ON THE SUPPRESSED SOLNS YET SINCE THERE ARE STILL MANY QUESTIONS TO BE ANSWERED...SO THE POTENTIAL FOR SEVERAL INCHES OF SNOW REMAINS POSSIBLE. NOT QUITE SURE IF WE WOULD BE ABLE TO REACH WARNING CRITERIA (6 INCHES) IN A OVERRUNNING PATTERN...BUT THE HIGHER QPF VALUES ARE JUST SOUTH OF THE AREA AND IT IS STILL COLD ENOUGH FOR SNOW.

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