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March 4-6 Potential Winter Storm


Chicago WX

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I likey grand rapids afd.. Reminds me like I said last night of last weekend and the past lame event up here. I'll remain skeptical.

WE CONTINUE TO TRACK THE SYSTEM FOR THE WEEKEND FOR THE POTENTIAL OF

SIGNIFICANT RAIN AND SNOW. HOWEVER THE SYSTEM THIS COMING WEEKEND

HAS THE SAME PROBLEM THE ONE THIS PAST WEEKEND HAD. THAT IS THERE IS

A LARGE BLOCKING UPPER LOW STALLED OVER HUDSON BAY CREATING

CONFLUENT FLOW ALOFT OVER THE NORTHERN GREAT LAKES. AS IT WAS THEN

OVER THIS PAST WEEKEND IT WILL BE SIMILARLY AGAIN THIS WEEKEND.

THERE IS EVEN A SIMILAR SOUTHERN STREAM JET CORE COMES IN FRONT OF

THE SHORTWAVE TROF TO PHASE THE DEPARTING NORTHERN STREAM JET ON

SATURDAY. ALSO...JUST LIKE THE PREVIOUS SYSTEM...THIS ONE WILL HAVE

GOOD GULF INFLOW AND A STRONG LOW LEVEL JET FEEDING PWAT VALUES OVER

250% OF NORMAL (NEAR 0.9 INCHES TO NEAR I-94) INTO LOWER MICHIGAN.

WE EVEN HAVE AN 80 KNOT LOW LEVEL JET AIMED AT OUR SOUTHERN CWA SAT

AFTERNOON WITH 850 DEW POINTS NEAR 5C. SEEMS LIKE THUNDER POTENTIAL

TO ME.

SO HERE IS MY QUESTION... IF THIS PAST SYSTEM WENT SOUTH OF MICHIGAN

DUE TO THE BLOCKING FLOW OVER SOUTHERN CANADA...WOULD NOT THIS ONE

DO THE SAME THING? ACTUALLY THERE IS LITTLE ARGUMENT ABOUT THAT BUT

WHERE THE PRIMARY DIFFERENCE SEEMS TO BE IS THE ECWMF ON THE 01/00Z

RUN HAS AN ALMOST NEGATIVE TILT UPPER TROUGH TO DEEPEN THE STORM BY

SATURDAY. CURIOUSLY THOUGH THE GFS CONTINUITY FROM RUN TO RUN HAS

BEEN BETTER THEN THE ECMWF RECENTLY. THE GFS HAS HAD A FLATTER WAVE

SEVERAL RUNS IN A ROW. EITHER WAY THERE WILL BE PRECIPITATION OVER

MOST OF THE CWA FRIDAY NIGHT INTO SATURDAY AS THIS WAVE PASSES BY

LOWER MICHIGAN. SO I INCREASED POP TO LIKELY SATURDAY. LIKE THIS

PAST SUNDAY THE QUESTION OF THUNDERSTORMS IN THE SOUTHERN CWA WOULD

AGAIN BE IN PLAY WITH THIS SYSTEM (NOT IN THE GRIDS JUST YET). THE

BLOCKING UPPER LEVEL FLOW SHOULD KEEP THE RAIN / SNOW LINE SHOULD

NEAR OR SOUTH OF ROUTE 10 THIS WEEKEND. THIS COULD BE A SIGNIFICANT

SNOW / RAIN EVENT BUT LIKE THIS PAST WEEKEND... THE QUESTION OF JUST

HOW MUCH WILL THE STRONG THUNDERSTORMS TO THE SOUTH OF THE WARM

FRONT WILL DIVERT THE FLOW OF LOW LEVEL MOISTURE NORTH INTO LOWER

MICHIGAN?

CLEARLY THIS IS OUR NEXT BIG FEATURE TO WATCH.

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I want :snowman: but it is looking like I am going to get :flood:

Would be some epic big time flooding with the euro. wow

Harry is screwed with an ice storm

I am getting the bullseye of all snow. :devilsmiley:

I would say I like my chances this far out with not being in the bullseye, but there really is nothing to prevent this from going west of michigan. Still plenty of time and 2-3 days before its on land. Also the stronger the first one the better chance at snow further south and east. Or is that not as likley in march.

It is possible any time of the year. More a matter of how much cold can this thing draw in.

Looks like the NAO currently is strongly positive and its slowly heading back down to neutral. Not sure where its at exactly when this storm hits but maybe that will help push it a little futher east.

Something to be watched for sure.

Remember when NAO/AO is heading down so does the storm track and thus south/se and when the AO/NA is rising it goes the other way. You still will get off runs though and thus see the 06z GFS.

Wonder how the Euro ens. looks.

A bit to the se of the euro but thats to be expected.

6z GFS says congrats southeast minnesota.

I would like a little of whatever it is the GFS is smoking. I remember this same model doing this with the last system and one before that too. :lol:

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I have not been paying too much attention to this event but was forced to after seeing the 0z Euro. Anyways after looking around the different guidance on the way into the office this morning i think a solution 100-200 miles west of the 0z Euro makes most the most sense, especially if the trough does take on that neg tilt. It's also hard not to place some weight on climo now that we're into March, which i know isn't an automatic game over, but a ripping gulf flow and march climo throws up warning flags.

As for model performance, they've each had their ups and downs this year, sometimes changing rapidly at this range and in a few instances locking in, so i'll just watch the means/trends and hope for the best there.

The main take away seems to be the excellent signal for a major and more importantly wet system with a ridiculous spring-like gulf connection. If the trough can start neut/pos the snow band will probably pretty thin but keep those further east in play, but if it wraps up neg, there could be a ridic defo band....but the potential for a hard left turn will be high.

just for fun long range probs for chicago

miss to the south/east <.50" rain/snow: 4%

heavy rain/brief changeover w/little accums: 75%

heavy rain to advisory accums: 15%

heavy snow: 5%

heavy snow >10": 1%

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csnavywx probably has the odds right, but how funny/ironic would it be if ORD and MKE got blasted with another huge snowstorm...with both storm threads started by LAF posters. :lightning:

I say we ban LAF poters from posting storm threads. :gunbandana:

Everytime you guys do we get screwed (in the relative sense). :ee:

I would quit tracking weather if Chicago got ANOTHER epic snowstorm in the same season.

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I say we ban LAF poters from posting storm threads. :gunbandana:

Everytime you guys do we get screwed (in the relative sense). :ee:

I would quit tracking weather if Chicago got ANOTHER epic snowstorm in the same season.

Don't worry this one is mine.. :scooter:

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I say we ban LAF poters from posting storm threads. :gunbandana:

Everytime you guys do we get screwed (in the relative sense). :ee:

I would quit tracking weather if Chicago got ANOTHER epic snowstorm in the same season.

Well certainly don't hold back your feelings on the matter. :rolleyes:

Of course the whole "whoever starts the storm thread is either a jinx or good luck" thing is quite played out. It's going to be whatever it wants it to be...

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I can not see how the nam would end up that far NW.

the 300mb jet is somewhat weak and out of the west, or even tilts south some.

the H5 vort is digging with more energy dumping in

the SE ridge is not very strong...and there is some suppression of heights north of the lakes.

the slp placement on the nam is a bit deceiving.

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Well certainly don't hold back your feelings on the matter. :rolleyes:

Of course the whole "whoever starts the storm thread is either a jinx or good luck" thing is quite played out. It's going to be whatever it wants it to be...

This thread is going down the crapper fast. However I do think he may have been joking though.

Amazing how we have to go through the same crap with every storm. Same folks constantly screaming it is gonna go nw and have the other group with the se crap as well. Would be another if just once they would post something with decent reasoning behind it. Always some lame ass reasoning behind it to. Oh it is early March, or oh every storm does this or that. Sorry but that is not decent reasoning.

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I can not see how the nam would end up that far NW.

the 300mb jet is somewhat weak and out of the west, or even tilts south some.

the H5 vort is digging with more energy dumping in

the SE ridge is not very strong...and there is some suppression of heights north of the lakes.

the slp placement on the nam is a bit deceiving.

The NAM may be a little too amped but with most ensemble means going NW and wide open gulf flow at 850 pumping up the baroclinic zone, i think a pretty far NW solution is the way to go at this point.

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I can not see how the nam would end up that far NW.

the 300mb jet is somewhat weak and out of the west, or even tilts south some.

the H5 vort is digging with more energy dumping in

the SE ridge is not very strong...and there is some suppression of heights north of the lakes.

the slp placement on the nam is a bit deceiving.

My hunch is that if the NAM went out farther it would close off the system rather quickly. Where it would go is another issue. And if it did not close off you can bet that low would still end up farther nw of the 06z GFS. It is the NAM though and at 84hrs so meh..

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My hunch is that if the NAM went out farther it would close off the system rather quickly. Where it would go is another issue. And if it did not close off you can bet that low would still end up farther nw of the 06z GFS. It is the NAM though and at 84hrs so meh..

looking at the SREF spread it's hard to place any weight on a single 84hr NAM solution now. I'm going to watch the shifts in the GFS/euro/GGEM ensemble mean and base my hunches off that.

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This thread is going down the crapper fast. However I do think he may have been joking though.

Amazing how we have to go through the same crap with every storm. Same folks constantly screaming it is gonna go nw and have the other group with the se crap as well. Would be another if just once they would post something with decent reasoning behind it. Always some lame ass reasoning behind it to. Oh it is early March, or oh every storm does this or that. Sorry but that is not decent reasoning.

I hope he was joking, but I'm not sure anymore. And yes, the same old stuff is regurgitated with every storm. Of course as we know, all storms don't act the same way...despite some that think they'll all go NW, or whatever. It gets old, but I guess it is what it is. Anyways, back to the storm topic...

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looking at the SREF spread it's hard to place any weight on a single 84hr NAM solution now. I'm going to watch the shifts in the GFS/euro/GGEM ensemble mean and base my hunches off that.

Good way to do it. Keep a eye on the front runner and the AO/NAO trends as well. I know some hate the idea of it but it has done well with me. More of a matter of figuring out temps/WAA if you do happen to be north of the low track. See the last event which took a great track for us but was still too warm for any meaningful snow.

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looking at the SREF spread it's hard to place any weight on a single 84hr NAM solution now. I'm going to watch the shifts in the GFS/euro/GGEM ensemble mean and base my hunches off that.

Serious question, but what value do the SREF's have in the 72+ hour time range? Let alone looking at the NAM outside of 60+ hours. I've been less than impressed with both of their performances lately. Of course maybe it's just me...

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Serious question, but what value do the SREF's have in the 72+ hour time range? Let alone looking at the NAM outside of 60+ hours. I've been less than impressed with both of their performances lately. Of course maybe it's just me...

little which was kind of the point, they're all over the map. If there was an odd case of agrement, it would be another thing. I do like watching the mean though to see which solutions fail and which hang around longer.

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