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March 23-24 System


RyanDe680

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00z GGEM looks a little south...surface low passes south of Chicago.

 

 

Wasn't going to say anything and jinx it.  :P

 

GGEM tracks the low from KC to Toledo.

 

 

CMC (GGEM?) seems to be much farther north from its 12Z Sunday run and looks more like GFS.

So which is it :lol:

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I realize there are synoptic drivers in play but I have a hard time believing that lake enhanced front is going to be denied passage around here, especially at this time of year.

Likewise off of Lake Huron with strong NE winds at the surface. The lakes should win the low level fight on this one.

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I realize there are synoptic drivers in play but I have a hard time believing that lake enhanced front is going to be denied passage around here, especially at this time of year.

 

Thinking back to 2/29, a couple models were lagging that front. In the end the front cleared I-80 rather quickly.

 

GFS suggests it doesn't pass ORD.

 

78 hours.

 

pratetypemw.png

 

gem_asnow_ncus_16.png

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If I remember correctly, wasn't the front about two hours faster than modeled, and end up near Pontiac?

 

Yeah that sounds about right. Even 3 hours ahead of time.

I remember it coming through right after 2pm. Was supposed to come through about 5pm here on most models. EURO was the fastest I know that.

 

 

I'm an hour ahead of you....so I have to wait. But sometimes when I go to the beach my phone picks up Central time across the lake and goes with your time.  :P 

 

 

O yeah, that's right.  :)

I guess you're not staying up that late. 

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Good discussion read from GRB.

 

 

.UPDATE...
ISSUED AT 853 PM CDT SUN MAR 20 2016

FORECAST FOCUS THE NEXT FEW DAYS WILL BE ON THE CYCLONE CROSSING
THE REGION MID-WEEK...AND IT/S POTENTIAL TO BRING A SIGNIFICANT
SNOWFALL TO THE REGION. THOUGH EXHIBITING SOME TIMING
DIFFERENCES...THE PAST FEW RUNS OF THE GFS...NAM...AND CANADIAN
MODELS GENERATED A SYSTEM THAT WOULD BRING HEAVY SNOW TO MUCH OF
THE FORECAST AREA. GIVEN THE SOLUTIONS OFFERED BY THESE MODELS...
SOME MIXING WITH SLEET AND FREEZING RAIN OR RAIN WOULD BE POSSIBLE
ACROSS ABOUT THE SOUTHERN QUARTER OF THE AREA. MEANWHILE...THE
PAST 2 RUNS OF THE ECMWF HAVE BEEN VERY CONSISTENT...AND HAD A
SLOWER AND MORE SOUTHERLY TRACK OF THE SYSTEM. IT/S TRACK COULD
STILL RESULT IN WARNING CRITERIA SNOWS OVER ABOUT THE SE 1/4 TO 1/3
OF THE FCST AREA...BUT WITH LOWER TOTALS AND A MUCH SHARPER
DECREASE IN PRECIPITATION NW OF THE FOX VALLEY.

A FEW THOUGHTS ON THIS SYSTEM FROM ROUGHLY 3 DAYS OUT. BOTH THE
GFS AND THE ECMWF HAD GOOD SUPPORT FROM THEIR RESPECTIVE ENSEMBLE
MEANS. LOOKED TO SEE IF THE GFS ENSEMBLE SHOWED EVEN A SMALL
CLUSTERING OF MEMBERS WITH A MORE SLY TRACK SIMILAR TO THE
ECMWF...AND FOUND NO EVIDENCE OF THAT. SO THERE DOESN/T SEEM TO
BE MUCH HELP FROM THE ENSEMBLE DATA. ONE THING THAT CAUGHT MY EYE
WAS THAT THE 12Z RUN OF THE UKMET TRACKED THE CYCLONE MUCH
FARTHER SE...BASICALLY EWD THROUGH THE OHIO VALLEY. THAT WOULD
INDICATE SOME SUPPORT FOR A TRACK MORE SIMILAR TO THAT OF THE
ECWMF...THOUGH UNLIKE THE ECMWF...THE UKMET WAS VERY FAST MOVG THE
SYSTEM EAST. IT/S ALSO HARD TO GO AGAINST THE ECMWF AFTER IT
CLEARLY OUT PERFORMED THE REST OF THE MODELS WITH LAST WEEKS
SYSTEM.

THE EVOLUTION OF THE SYSTEM WILL CERTAINLY COME INTO BETTER FOCUS
DURING THE NEXT 24-48 HOURS...BUT AT THIS POINT THERE IS REASON
TO BE AT LEAST A LITTLE SKEPTICAL ABOUT THE VERY HEAVY SNOWFALLS
GENERATED BY THE GFS. CURRENT HWO HIGHLIGHTS THE POTENTIAL FOR A
STORM TO BRING SIGNIFICANT TRAVEL DISRUPTIONS TO AT LEAST PORTIONS
OF THE REGION DURING THE MIDDLE TO LATTER PART OF THE WEEK. THAT
SEEMS LIKE THE BEST WAY TO HANDLE THE SITUATION UNTIL BETTER
CONFIDENCE IS GAINED IN THE LOCATION OF THE HEAVY SNOW BAND AND
THE SNOW AMOUNTS LIKELY TO OCCUR IN THE BAND.
&&

 

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