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Possible winter storm March 1st-2nd


Thundersnow12

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Chicago pastejob

 

Initially yes, but with increasing ratios and lake enhanced snow as the low pulls a bit more east. Looks like a good scenarios for a backside LES plume along the western shoreline for a time - a lot like GHD 1.0.

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Really incredible run of the Euro. Instead of the northern stream overpowering everything like on the rest of the 12z guidance, the northern energy phases in with the primary/southern wave. There's also an excellent coupled upper level jet streak pattern. You can see the potential with the jet streaks on the GFS despite the completely different solution at the midlevels and surface. On public desk at LOT and we're going continuity in the extended grids given the huge discrepancy in the guidance. Obvious tendency is to want to trust the better continuity of the Euro but would like to see what 12z EPS shows as well.

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Anyone know why there's such a huge difference between where snow falls/accumulates on EuroWx vs WxBell? Look at how different they are.

 

Down by Peoria it is overdone. This setup would have mixed precip with the low level NE flow.

...

 

Now can we just get another model on board?...

 

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Fuel for lake enhancement.

 

mswt-00.gif

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Would like to know what this ILN forecaster was looking at when making the new long range part of the AFD.

 

 

.LONG TERM /MONDAY THROUGH FRIDAY/...
STORM SYSTEM WILL BE EXITING THE AREA AT THE BEGINNING OF THE
LONG TERM. DRY CONDITIONS WILL BE PRESENT MONDAY AND MONDAY NIGHT.
WINDS QUICKLY TRANSITION TO SW FLOW ON MONDAY. THIS WILL ALLOW FOR
TEMPERATURES TO BE IN THE 40S AND 50S.

A SYSTEM WILL BEGIN TO MOVE THROUGH THE FA ON TUESDAY WITH
PRECIPITATION BECOMING WIDESPREAD TUESDAY NIGHT BEFORE TAPERING OFF
ON WEDNESDAY.  THE ECMWF HAS BEEN PRETTY CONSISTENT WITH THIS SYSTEM
AND THE GFS HAS COME MORE INTO LINE WITH THE ECMWF INCREASING
CONFIDENCE.
  DUE TO THIS HAVE INCREASED PRECIPITATION CHANCES.

PRECIPITATION WILL START OUT AS RAIN HOWEVER AS COLDER AIR MOVES IN
TUESDAY NIGHT PRECIPITATION WILL CHANGE OVER TO SNOW SHOWERS.  WINDS
WILL BE GUSTY AT TIMES WITH THIS SYSTEM WITH SOME WIND GUSTS OVER 30
MPH. TEMPERATURES WILL HAVE A HARD TIME RECOVERING ON WEDNESDAY WITH
RESIDUAL CLOUD COVER. THEREFORE WENT WITH HIGH TEMPERATURES ON
WEDNESDAY ONLY IN THE 30S.

HIGH PRESSURE WILL BRIEFLY MOVE IN FOR WEDNESDAY NIGHT.  MODELS
DIVERGE AFTER THIS TIME HOWEVER CONTINUED TO GO CLOSE TO THE ECMWF
FOR THIS PACKAGE.  WITH THIS SOLUTION AN AREA OF LOW PRESSURE WILL
MOVE SOUTH OF THE AREA ON THURSDAY WITH PRECIPITATION OVERSPREADING
THE AREA THURSDAY AND MOVING OUT ON FRIDAY.

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