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Jan 17-18th disco thread--1st big threat of the year


Midlo Snow Maker

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I mean its north again yes, but not that good. Euro maybe generally trends slowly until the event, but I'd want a bigger step Ian. 

 

what trend?...we are 30 hours from the event...It is either going to get it right or bust...It is usually right...the American models will back off at 18z and we will look foolish and talk about how awful the NAM is only to suck its d-ick again next storm

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I mean its north again yes, but not that good. Euro maybe generally trends slowly until the event, but I'd want a bigger step Ian. 

it's not much better but it is a bit better qpf wise around dc. two more runs of that might work. i'd like more too but i think we assume too much about skill on the edge anyway.
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what trend?...we are 30 hours from the event...It is either going to get it right or bust...It is usually right...the American models will back off at 18z and we will look foolish and talk about how awful the NAM is only to suck its d-ick again next storm

Even if 18z went back south it'd be hard to, I'd rather wait until 0z. 

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it's not much better but it is a bit better qpf wise around dc. two more runs of that might work. i'd like more too but i think we assume too much about skill on the edge anyway.

 

Very sensible post. I've seen the back edge end up broader inside of 12 hours. Heck, it's happened numerous times while nowcasting. We can easily get cut off too but saying the euro has it nailed is crazy talk. 

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Don't know if anyone posted this from the HPC Model Discussion:

 

SYSTEM MOVING THROUGH THE SOUTHEAST THURSDAY
TROUGHING MOVING ACROSS THE NORTHEAST LATE THURSDAY
PREFERENCE:  GENERAL MODEL COMPROMISE WITH AVERAGE CONFIDENCE

THE GUIDANCE SINCE THIS TIME YESTERDAY HAS TRENDED STRONGER
(INCLUDING THE NAM) AND MORE SEPARATED BETWEEN THIS SYSTEM AND THE
TROUGHING ACROSS THE NORTHEAST, WHICH LED TO A MORE NORTHERLY
SURFACE LOW REMINISCENT OF YESTERDAY'S 12Z NAM SOLUTION (THOUGH
SEVERAL HOURS SLOWER).  THIS TREND EXTENDS TO THE 00Z GLOBAL
ENSEMBLE GUIDANCE.  LIKE MOST DAYS, THE 12Z NAM IS THE STRONGEST
OF THE GUIDANCE ALOFT AND MOST NORTHERLY AT THE SURFACE, LYING AT
OR BEYOND THE NORTHERN FRINGE OF THE 00Z GLOBAL ENSEMBLE GUIDANCE.
CONSIDERING MODEL TRENDS, IT IS HARD TO DISCOUNT THE 12Z NAM.

THEREFORE, THE PREFERENCE IS FOR A GENERAL MODEL COMPROMISE WITH
THIS SYSTEM WITH ONLY AVERAGE CONFIDENCE AS WINTER WEATHER
POTENTIAL (PLACEMENT AND AMOUNTS) WILL BE HIGHLY SENSITIVE TO THE
SURFACE LOW TRACK AND STRENGTH OF ITS UPPER LEVEL LOW.  SEE THE
PROBABILISTIC HEAVY SNOW/ICING DISCUSSION (QPFHSD) FOR MORE
INFORMATION REGARDING THIS SYSTEM'S WINTER WEATHER POTENTIAL
ACROSS THE SOUTHEAST AND MID-ATLANTIC STATES.

 

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it is dry, less amped..not a good run for us...maybe a cartopper or light dusting or event rain/snow mix

i know you are hoping very strongly for a miss since you werent paying attention till yesterday but as with last night's run this one moved in the right direction comparatively. run the panels together and you'll see your commentary is wrong.

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i know you are hoping very strongly for a miss since you werent paying attention till yesterday but as with last night's run this one moved in the right direction comparatively. run the panels together and you'll see your commentary is wrong.

 

It is hilarious that you think I am hoping for a miss...the euro run sucks and has never been a snowstorm for us....the 12z run is extremely similar to last nights run...barely any discernible difference...if you want to hang your hat on the NAM feel free....I am very bearish and justifiably so...but the fact that you think I am rooting against snow is ludicrous

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It is hilarious that you think I am hoping for a miss...the euro run sucks and has never been a snowstorm for us....the 12z run is extremely similar to last nights run...barely any discernible difference...if you want to hang your hat on the NAM feel free....I am very bearish and justifiably so...but the fact that you think I am rooting against snow is ludicrous

where did i say i was hanging my hat on the nam? your tone makes it pretty obvious where you stand. you give others about wrongly stating what a model shows so i thought you cared about accuracy. yeah.. verbatim it's pretty lame. but a) who knows if it's right and b ) this is a model thread so might as well share the actual changes.
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where did i say i was hanging my hat on the nam? your tone makes it pretty obvious where you stand. you give others about wrongly stating what a model shows so i thought you cared about accuracy. yeah.. verbatim it's pretty lame. but a) who knows if it's right and b ) this is a model thread so might as well share the actual changes.

 

If you think I dont want snow and as much as possible you are an idiot...the euro run which was predictable bummed me out....there is barely any discernible difference between last nights run and todays...I wont ever be sucked in by the NAM on any storm ever...it is an absolute joke of a model

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These were my 11am thoughts on my FB page for DC proper and immediate burbs...I wouldnt change a thing yet

 

20% chance of a complete whiff. 25% chance of just flurries or some light rain/snow mix that may accumulate a little on grass and cartops. 30% chance of a 1-2" snowfall that has trouble accumulating very well until after dark when it may accumulate well on all surfaces. 25% chance of a 2-5" event with a more significant impact on rush hour, likely becoming heavy in the evening....I'll update later.

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If you think I dont want snow and as much as possible you are an idiot...the euro run which was predictable bummed me out....there is barely any discernible difference between last nights run and todays...I wont ever be sucked in by the NAM on any storm ever...it is an absolute joke of a model

 

The GFS also shows over .5 qpf into DC...... what about it?

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Why is there such a fuss about the euro? It's the driest outlier. It can be right or the nam or the gfs or the srefs or even the canadians. I know I'm not just going to toss everything for the driest outlier. 

 

This is a compact and relatively potent system. It was off the table for days and days because the stone wall of confluence to the N. Now the confluence isn't as awful and the storm is much more organized and stronger. 50-100 miles in any direction is well withing a fair margin for any model. 

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