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Model discussion thread


ORH_wxman

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Yeah, there is actually pretty decent model agreement for the offshore bomb.

 

The Pacific Verbal Tsunamis Network has issued a false-optimism alert for "for this time range that is just where we want it"  If you observe these words, move to higher ground ...lest risk drowning in dreamy elation only to wake up in the desert.  

 

J/k...

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That's odd, though.  The wave length appears too long.  Ridge node at 120W and trough in the OV is ...heh.  

 

Also, with the NAO domain being so positive a west correct isn't impossible there.  Talking about the first of the two amplitudes on this Euro.  

 

Not saying we are getting that storm, but personally the correction on future run is going to be interesting.  

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do the models you watch update "few times per day"? and is that the same for long range projections? thanks ahead of time..

Twice a day 0z and 12z.

EURO (runs 1am and 1pm)

GEM/Canadian (runs 11am and 11pm)

UKMET (not sure)

Four times a day 0z 6z 12z 18z

GFS (4:30am-10:30am-4:30pm-10:30PM)

NAM (9:00am-3:00pm-9:00pm-3:00am)

RGEM (not sure)

WRF BTV (not sure)

2.5km RGEM (not sure)

Hourly (Usually good for short term modeling within 6-12hrs, often can be wrong or inaccurate, sometimes invaluable)

RAP

HRRR

Euro and GFS (GEM too, but no one really pays much attention) both run ensembles that come out an hour or two after. Ensembles are basically the same model run with different settings, run multiple times and then averaged together into a mean to give you a more accurate forecast.

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Twice a day 0z and 12z.

EURO (runs 1am and 1pm)

GEM/Canadian (runs 11am and 11pm)

UKMET (not sure)

Four times a day 0z 6z 12z 18z

GFS (4:30am-10:30am-4:30pm-10:30PM)

NAM (9:00am-3:00pm-9:00pm-3:00am)

RGEM (not sure)

WRF BTV (not sure)

2.5km RGEM (not sure)

Hourly (Usually good for short term modeling within 6-12hrs, often can be wrong or inaccurate, sometimes invaluable)

RAP

HRRR

Euro and GFS (GEM too, but no one really pays much attention) both run ensembles that come out an hour or two after. Ensembles are basically the same model run with different settings, run multiple times and then averaged together into a mean to give you a more accurate forecast.

thank you!

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That's the control, not the ensembles.

Mean snow on the ensembles would be a 2-4" deal verbatim for the 120-132 hour thing, but if you look at the individuals, there's a huge portion of them that has way bigger solutions. They also love the 180 hour threat as well, really nice clustering there. Wish I could post the individual MSLP maps, really really nice.

Control

post-12762-0-65427600-1421698603_thumb.j

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That's the control, not the ensembles.

 

Mean snow on the ensembles would be a 2-4" deal verbatim for the 120-132 hour thing, but if you look at the individuals, there's a huge portion of them that has way bigger solutions. They also love the 180 hour threat as well, really nice clustering there. Wish I could post the individual MSLP maps, really really nice.

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It will be 1 storm. We never get hit with back to backs. Those always morph into one threat

 

We do from time to time, though.  In 1996 we had back to back within 18 hours. That was the one that Jim Cantore was in Worcester in thundersnow.   It was preceded less than 24 hour prior by a midland but potent burst of dynamic snows associated with a rapid deepening low that moved just S of LI.  

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We do from time to time, though.  In 1996 we had back to back within 18 hours. That was the one that Jim Cantore was in Worcester in thundersnow.   It was preceded less than 24 hour prior by a midland but potent burst of dynamic snows associated with a rapid deepening low that moved just S of LI.

Dec 2008 had a good back to back storm I recall
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All guidance has a very strong signal for the 27th, including the ensembles. Both the EPS mean and GEFS mean have a mslp of 1001mb, which is a pretty big signal for 8 days.

 

I do wonder if in 4 days from now, we will be discussing the signal for the one after that. Always 8-10 days away...

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Superstorm of 93 had a positive AO and NAO...so you can get big/monster storms with that set up.  But with that being said, this will find some way to NOT happen, and just become mood snow showers that dust the ground, and evaporate soon after.  The 8-10 always looks nice in winters like this...that's what keeps us hanging on and hanging on lol.   

 

Like JC said, in four days this will be trending to a non event, and the 8-10 will have another nice look to it, and we start all over again.

 

At some point, you would think the law of averages would have to Kick In.....right?  Can you miss everything... for the whole season?

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Superstorm of 93 had a positive AO and NAO...so you can get big/monster storms with that set up.  But with that being said, this will find some way to NOT happen, and just become mood snow showers that dust the ground, and evaporate soon after.  The 8-10 always looks nice in winters like this...that's what keeps us hanging on and hanging on lol.   

 

Like JC said, in four days this will be trending to a non event, and the 8-10 will have another nice look to it, and we start all over again.

 

At some point, you would think the law of averages would have to Kick In.....right?  Can you miss everything... for the whole season?

Right, but it also went over Concord, NH.

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