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January 3-6th Winter Storm


Chicago Storm

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EURO's been pretty consistent but we've heard that story before.

Yep, 12z euro has 0.9-1.0" of QPF for YYZ with two waves moving through. First half is likely 8:1 ratio slop with surface temps hovering just above 0c, although 850's are solidly below 0c. 0z ensemble mean was further east, however.

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Euro continues to trend stronger with the second lobe rounding the PV centre, which helps shift the southern vort max southwards. It also looks more progressive with the initial piece of AJ energy. Wouldn't be surprised to see track shift SE slightly if trends continue.

The UK/ GGEM/NAVGEM track would be golden for us. 

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Don't know if posted but DTX thinks Euro is outlier..

 

ONE FINAL THOUGHT...EURO CONTINUES TO ADVERTISE HEAVY SNOW FOR THE
AREA SUNDAY AND SUNDAY NIGHT AS LOW PRESSURE TRACKS UP THROUGH OHIO.
CURRENT RUNS OF OTHER MODELS (00Z GFS/GEM) ARE FURTHER SOUTH AND
EAST WITH THIS FEATURE BUT HAVE SHOWN IT ON OCCASION OVER THE PAST
SEVERAL DAYS. THESE OTHER MODELS HAVE ALSO COME TO A BETTER
CONSENSUS WITH THE TIMING OF THE COLD FRONTAL PASSAGE SATURDAY
NIGHT/EARLY SUNDAY AND WITH THE ARRIVAL OF UPSTREAM ENERGY INTO
CANADA...BOTH OF WHICH WILL BE MAJOR PLAYERS IN THIS POTENTIAL NEXT
STORM TRACK. EURO MODEL HAS BEEN A BIT OF AN OUTLIER WITH THE
HANDLING OF ENERGY FROM THE POLAR VORTEX OVER THE PAST FEW
DAYS...DIGGING IT FURTHER SOUTH...AND HAS RECENTLY STARTED SHOWING
MORE VARIATION WITH HOW IT HANDLES THIS ENERGY. FORECAST THEREFORE
FAVORS THE SOLUTIONS OF THE GFS/GEM FOR NOW (STORM MISSING US) BUT
THE POTENTIAL WILL CERTAINLY BEAR WATCHING OVER THE NEXT FEW DAYS.

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Don't know if posted but DTX thinks Euro is outlier..

 

ONE FINAL THOUGHT...EURO CONTINUES TO ADVERTISE HEAVY SNOW FOR THE

AREA SUNDAY AND SUNDAY NIGHT AS LOW PRESSURE TRACKS UP THROUGH OHIO.

CURRENT RUNS OF OTHER MODELS (00Z GFS/GEM) ARE FURTHER SOUTH AND

EAST WITH THIS FEATURE BUT HAVE SHOWN IT ON OCCASION OVER THE PAST

SEVERAL DAYS. THESE OTHER MODELS HAVE ALSO COME TO A BETTER

CONSENSUS WITH THE TIMING OF THE COLD FRONTAL PASSAGE SATURDAY

NIGHT/EARLY SUNDAY AND WITH THE ARRIVAL OF UPSTREAM ENERGY INTO

CANADA...BOTH OF WHICH WILL BE MAJOR PLAYERS IN THIS POTENTIAL NEXT

STORM TRACK. EURO MODEL HAS BEEN A BIT OF AN OUTLIER WITH THE

HANDLING OF ENERGY FROM THE POLAR VORTEX OVER THE PAST FEW

DAYS...DIGGING IT FURTHER SOUTH...AND HAS RECENTLY STARTED SHOWING

MORE VARIATION WITH HOW IT HANDLES THIS ENERGY. FORECAST THEREFORE

FAVORS THE SOLUTIONS OF THE GFS/GEM FOR NOW (STORM MISSING US) BUT

THE POTENTIAL WILL CERTAINLY BEAR WATCHING OVER THE NEXT FEW DAYS.

 

 

LOL

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Don't know if posted but DTX thinks Euro is outlier..

 

ONE FINAL THOUGHT...EURO CONTINUES TO ADVERTISE HEAVY SNOW FOR THE

AREA SUNDAY AND SUNDAY NIGHT AS LOW PRESSURE TRACKS UP THROUGH OHIO.

CURRENT RUNS OF OTHER MODELS (00Z GFS/GEM) ARE FURTHER SOUTH AND

EAST WITH THIS FEATURE BUT HAVE SHOWN IT ON OCCASION OVER THE PAST

SEVERAL DAYS. THESE OTHER MODELS HAVE ALSO COME TO A BETTER

CONSENSUS WITH THE TIMING OF THE COLD FRONTAL PASSAGE SATURDAY

NIGHT/EARLY SUNDAY AND WITH THE ARRIVAL OF UPSTREAM ENERGY INTO

CANADA...BOTH OF WHICH WILL BE MAJOR PLAYERS IN THIS POTENTIAL NEXT

STORM TRACK. EURO MODEL HAS BEEN A BIT OF AN OUTLIER WITH THE

HANDLING OF ENERGY FROM THE POLAR VORTEX OVER THE PAST FEW

DAYS...DIGGING IT FURTHER SOUTH...AND HAS RECENTLY STARTED SHOWING

MORE VARIATION WITH HOW IT HANDLES THIS ENERGY. FORECAST THEREFORE

FAVORS THE SOLUTIONS OF THE GFS/GEM FOR NOW (STORM MISSING US) BUT

THE POTENTIAL WILL CERTAINLY BEAR WATCHING OVER THE NEXT FEW DAYS.

Considering the EURO record lately can you blame them??

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Until this current system passes through I am not latching onto any solution, there is a not of moving parts with the current system that eventually will affect this system. Not to mention there is another system that will pass north of us that will have an effect on this system as well.

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Until this current system passes through I am not latching onto any solution, there is a not of moving parts with the current system that eventually will affect this system. Not to mention there is another system that will pass north of us that will have an effect on this system as well.

GRR thinks it needs to be watched:

FXUS63 KGRR 011747

AFDGRR

AREA FORECAST DISCUSSION

NATIONAL WEATHER SERVICE GRAND RAPIDS MI

1247 PM EST WED JAN 1 2014

.LONG TERM...(FRIDAY NIGHT THROUGH TUESDAY)

ISSUED AT 326 AM EST WED JAN 1 2014

I SEE TWO MAJOR ISSUES WITH THIS FORECAST TIME FRAME. FIRST IS

THREAT OF A WAVE TRACKING UP THE FRONT SUNDAY NIGHT...THAT COULD BE

A MAJOR SNOW STORM FOR PARTS OF OUR CWA SUNDAY INTO EARLY MONDAY.

THE NEXT ISSUE IS THE MAJOR COLD OUTBREAK FOR EARLY NEXT WEEK.

AS IT TURN OUT THE MODELS HAVE COME INTO MUCH BETTER AGREEMENT ON

THE UPPER LOW DROPPING SOUTH FROM THE NORTH POLE TO MICHIGAN BY

MONDAY. SO IT IS LOOKING BETTER FOR THAT -30C 850 MB TEMP AIR TO

REACH LOWER MICHIGAN BY EARLY TUESDAY MORNING. IF THIS HAPPENS...

OUR HIGHS WILL STRUGGLE TO MAKE ZERO FOR ANY AIR FLOW NOT OFF LAKE

MICHIGAN... SO LOCATIONS LIKE BTL...JXN AND LAN MAY WELL NOT GET

ABOVE ZERO TUESDAY (AS PER THE LATEST ECMWF MODEL SURFACE TEMP

FORECAST).

WITH THE COLD AIR COMES LAKE EFFECT SNOW... THE MOISTURE WILL BE

DEEP ENOUGH GIVEN THE CLOSED UPPER LOW NEAR MICHIGAN SO THERE WILL

BE LAKE EFFECT. THUS I HAVE LIKELY POP MONDAY INTO TUESDAY WEST OF

US-131. SINCE THE AIR IS SO COLD... SNOW AMOUNTS WILL BE LIMITED BUT

WITH THE SMALL FLAKE SIZE THERE WOULD STILL BE LOW VISIBILITIES DUE

TO BLOWING SNOW.

THIS DIGGING UPPER LOW CREATES YET ANOTHER ISSUE... PHASING WITH A

PACIFIC SYSTEM THAT COMES INTO THE PACIFIC NORTHWEST FRIDAY. THE

ECMWF DOES A BETTER JOB OF PHASING THESE SYSTEM SO I RESULTS IN

RAPIDLY DEEPENING LOW THAT TRACK ACROSS NORTHERN OHIO SUNDAY NIGHT.

THE ECMWF HAS BEEN TRACKING THIS SYSTEM FOR A WEEK OR SO BUT THE

LOCATIONS SEEMS TO FLUCTUATE. ACTUALLY THE LATEST GFS HAS A SYSTEM

TOO BUT IS A TOUGH FARTHER SOUTH... AS IS THE GEM. GIVEN THE

STRAIGHT OF THE UPPER AIR SYSTEM I COULD SEE IT BEING A LITTLE

SLOWER AND THAT WOULD ALLOW TIME FOR PHASING. WE WILL REALLY HAVE TO

WATCH THIS ONE. IF THIS HAPPENS IT WOULD BE A MORE SIGNIFICANT SNOW

STORM THAN THE ONE WE ARE FORECASTING TODAY.

BOTTOM LINE... WINTER CONTINUES.

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I wouldn't be so quick to write off the euro. The gfs didn' even have a Midwest snowstorm until the last run or 2. The euro has had this storm for 3 days now (at least). I agree the euro hasn't been great, but with the gfs bias of suppressing storms in the long term and then drifting nw with time, I wouldn't be surprised to see the gfs trend stronger and nw

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Euro continues to trend stronger with the second lobe rounding the PV centre, which helps shift the southern vort max southwards. It also looks more progressive with the initial piece of AJ energy. Wouldn't be surprised to see track shift SE slightly if trends continue.

 

 

The UK/ GGEM/NAVGEM track would be golden for us. 

It would be amazing to get a 6" storm followed by vodka cold.

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IWXwx, on 01 Jan 2014 - 5:21 PM, said:

Euro has been looking interesting *cough*1*hack*26*gasp*78*cough cough*

 

Sorry, I've got a tickle in my throat.

 

There are some similarities, but the main difference is the southern stream wave.

 

The southern stream wave dug much further south and even closed off at 546dm in 1978.

 

jan2427_1978_500_loop.gif

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