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November 16-18 Storm System


Hoosier

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Looks like an impressive trough will dig into the west and may or may not eventually result in a cutoff low in the Plains.  Details yet to be worked out obviously but if it does become cutoff, would lead to more impressive rain amounts and possibly a flooding threat somewhere in the region.  May need to ultimately adjust the dates here once it becomes more clear what we're dealing with but wanted to get things going.

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GFS had this solution a couple days ago... it seems it's been having trouble figuring out when the STJ combines with the polar jet. The solution where they combine later provides a less impressive system... when they combine earlier (in those case, New Mexico), it creates this monster.

 

A 60+ knot LLJ sets up and hardly moves (relatively speaking) over the span of 2 days.

 

8SjYsMY.png

muVTLfZ.png

 

Rain totals in this run:

TSvKdnK.gif

 

The last time it had this crazy trough:

rzh2QLS.gif

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Bombs away on the 00z ECMWF.  Wow.

Well, yeah, it dropped it from 983mb on the 12z-168hr forecast to 974 on the 00z 168-hr forecast. Of course, those are 12 hours different, so that's a factor. Then, of course, there is what you posted above-- which is comparing apples to apples (that is, forecasts for the same time). Regarding this storm: did you see what the 18z GFS did to Kansas? Kansas weather weenies would be posting that run. That is, if we had a large contingent of posters from Kansas. Note: The 00z GFS brings 15-28" of snow to northwest Kansas and Colorado. I'll have to post that one in the Mountain West thread.

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Alek screwjob and you near the rain/snow line for system #2...looks about right  :guitar:

 

 

attachicon.gifgem_mslp_pcpn_frzn_us_40.png

 

 

Between both systems, enormous area of 6+ inches of rain with a pretty large area of 10-15 or so  :blink:

 

 

:lmao:

 

and i think widespread heavy rains are close to a lock...GFS/Euro in pretty good agreement with the massive ridging and wide open gulf flow

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:lmao:

 

and i think widespread heavy rains are close to a lock...GFS/Euro in pretty good agreement with the massive ridging and wide open gulf flow

 

 

Agree, I think the main question is whether it's more of a run of the mill heavy rain event or it gets out of hand like some runs have been suggesting. 

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ILX already hi-lighting it in the HWO.

HAZARDOUS WEATHER OUTLOOK  NATIONAL WEATHER SERVICE LINCOLN IL  1141 AM CST THU NOV 12 2015    ILZ027>031-036>038-040>057-061>063-131200-  CASS-CHAMPAIGN-CHRISTIAN-CLARK-COLES-CUMBERLAND-DE WITT-DOUGLAS-  EDGAR-FULTON-KNOX-LOGAN-MACON-MARSHALL-MASON-MCLEAN-MENARD-MORGAN-  MOULTRIE-PEORIA-PIATT-SANGAMON-SCHUYLER-SCOTT-SHELBY-STARK-  TAZEWELL-VERMILION-WOODFORD-  1141 AM CST THU NOV 12 2015     DAYS TWO THROUGH SEVEN  FRIDAY THROUGH WEDNESDAY    A WET WEATHER PERIOD IS FORECAST TO DEVELOP FROM SUNDAY NIGHT  THROUGH WEDNESDAY NIGHT. RAINFALL TOTALS IN EXCESS OF 3 INCHES  ARE POSSIBLE DURING THE PERIOD...WITH THE HEAVIEST RAINFALL LIKELY  TO OCCUR ON TUESDAY AND WEDNESDAY.     12Z ECMWF off eurowx has a six inch bullseye along the IL river valley near PIA.
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