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The Big One - Forecast & Discussion


Wow

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RGEM cut my ZR totals significantly....18z NAM actually shows .50" on the raw text

Chris,

 

The NWS forecast is strange down this way (Perry/Warner Robins).  We're under an Ice Storm Warning, but the forecast on weather.gov makes no mention of any frozen precip until tomorrow night.  Tomorrow is rain with a high of 35 with 1-2 inches of rain forecasted.  The forecast doesn't seem to match up with the warning.  Maybe you are AbsolutZero can shed some light on this.  Thanks!

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I know anything is possible but no way the low tracks INTO the CAD

Agree. Thermal profiles aloft and at the surface does not support and inland track. Its going to be offshore of Wilmington and Hatteras

 

Not much has change from the little map I showed earlier.  The wedge is established and the trough axis is already off shore with a developing LP in the western gulf. Like burger said earlier the path of least resistence.

 

1.png

 

When does the wedge start cranking up... I don't see NE Winds at many locations

 

Its there ... but this is the 925mb would give a good indication of where the zr boundary will be later when precip moves in.

 

925mb.gif?1392156239333

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Agree. Thermal profiles aloft and at the surface does not support and inland track. Its going to be offshore of Wilmington and Hatteras

Its there ... but this is the 925mb would give a good indication of where the zr boundary will be later when precip moves in.

v/exper/mesoanalysis/s19/925mb/925mb.gif?1392156239333[/img]

It's hard to imagine the Euro being that far off, it's completely owned this storm.

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HEAVENS TO BETSY!! This wording hasn't been written in this area in many years.

URGENT - WINTER WEATHER MESSAGE

NATIONAL WEATHER SERVICE PEACHTREE CITY GA

430 PM EST TUE FEB 11 2014

GAZ027-036>039-042>044-046>051-055-057-121200-

/O.CAN.KFFC.WS.W.0002.000000T0000Z-140213T1800Z/

/O.NEW.KFFC.IS.W.0001.140212T0000Z-140213T1800Z/

MADISON-CLARKE-OCONEE-OGLETHORPE-WILKES-CARROLL-DOUGLAS-

SOUTH FULTON-ROCKDALE-WALTON-NEWTON-MORGAN-GREENE-TALIAFERRO-

CLAYTON-HENRY-

INCLUDING THE CITIES OF...ATHENS...CARROLLTON...DOUGLASVILLE...

EAST POINT...CONYERS...COVINGTON

430 PM EST TUE FEB 11 2014

...ICE STORM WARNING IN EFFECT FROM 7 PM THIS EVENING TO 1 PM EST

THURSDAY...

...WINTER STORM WARNING IS CANCELLED BUT HAS BEEN REPLACED WITH AN

ICE STORM WARNING...

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED AN ICE

STORM WARNING...WHICH IS IN EFFECT FROM 7 PM THIS EVENING TO 1 PM

EST THURSDAY. AN ICE STORM WARNING HAS IMPACTS WHICH ARE AS GREAT

OR GREATER THAN THE WINTER STORM WARNING. THE ONLY DIFFERENCE IS

THE ICE STORM WARNING AREA WILL HAVE MORE ICE THAN SNOW WITH ITS

IMPACTS FOR THIS EVENT.

* LOCATIONS...ALONG AND EITHER SIDE OF A LINE FROM FRANKLIN TO

NEWNAN AND PEACHTREE CITY TO WARRENTON.

* HAZARD TYPES...MAINLY FREEZING RAIN WITH SOME SNOW AND SLEET.

* TIMING...SNOW...SLEET AND FREEZING RAIN WILL BEGIN LATE

TONIGHT...GENERALLY AFTER MIDNIGHT AND CONTINUE INTO WEDNESDAY.

THIS WILL GRADUALLY CHANGEOVER TO ALL FREEZING RAIN WEDNESDAY

INTO WEDNESDAY NIGHT. THE ACTIVITY SHOULD END AS LIGHT SNOW LATE

WEDNESDAY NIGHT INTO THURSDAY MORNING.

* IMPACTS...THESE HIGH ICE ACCUMULATION AMOUNTS WILL MAKE TRAVEL

IMPOSSIBLE. THIS HAS THE POTENTIAL TO BE A CATASTROPHIC EVENT.

WIDESPREAD AND EXTENDED POWER OUTAGES ARE LIKELY AS ICE

ACCUMULATES ON TREES AND POWERLINES AND BRINGS THEM DOWN. PLEASE

PREPARE TO BE WITHOUT POWER IN SOME LOCATIONS FOR DAYS AND

PERHAPS AS LONG AS A WEEK. ONCE THE ICE BEGINS TO MELT ON

THURSDAY AND FRIDAY...FALLING ICE FROM BRIDGES AND OVERPASSES

WILL CREATE AN ADDITIONAL HAZARD.

* WINDS...NORTHEAST 10 TO 15 MPH WITH GUSTS UP TO 25 MPH. THESE

WIND SPEEDS IN CONJUNCTION WITH THE ICE WILL EXACERBATE THE

POTENTIAL FOR FALLING TREES.

* TEMPERATURES...IN THE LOWER 30S AND DROPPING INTO THE UPPER 20S.

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It could track through the Pamlico Sound and the Euro wouldn't be far off. We're talking about 50 miles here. A 50 mile track difference means a lot for parts of the Piedmont, but that's a pretty minor adjustment.

RAH favored the Euro, but believed the storm would actually track 50 miles SE of the Euro's verbatim solution.

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Ice storm warning coming out for ATL metro and EC Georgia. 

 

Jim Cantore left Columbia and headed to Augusta.  Which is odd.  I mean; KCAE handles that I believe; but.. modeling is looking odd and pretty bad for that area possibly down that way.  I could only assume Macon and points North would have a pretty strong shot at Winter weather?

 

EDIT; nvm; checked your grids out.  Cool.

 

Kcae looks a little less icey; but I don't know what will verify for anyone located there guys!

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Jim Cantore left Columbia and headed to Augusta. 

 

Jeez.... you know it's bad when Jim Cantore comes to your town. Well? Do I need to try and nut him, guys?

 

Also, that GFS has got to be ZR as well as snow depth, right?

 

Right?

 

I don't want 3-4" of snow on top of the ice...

 

Edit: I see Jon's response. Was fairly sure it accounted for all wintery precip anyhow. We're only due for maybe .1-.2" of IP/SN.

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No I don't want a huge ice storm here at all.  I just have a really big forecast area to make a forecast for and its very difficult.

This will be deleted, and rightfully so, but I have a suggestion for your forecast. Just go on air and say, "Remember when we were teenagers and went out on a Saturday night all excited but not knowing if we would get screwed or not? It's like that"

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Does this map take into account all wintery precip? It get confusing trying to sort out which ones do and don't.

yeah. People are getting excited because it shows their backyard with 12", that's all. I'm sure soundings tell a different story.

 

Edit:

 

KCLT 12z GFS left, 18z GFS right. Unless the "S" shape means Snow, they're looking at a mixed bag.

 

b3V3pHO.png

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For anyone wanting a good lesson on rain and snow lines, thicknesses, problems with using 850 temps as a whole.. this is a great start!

http://www.wxonline.info/topics/thickness_pcp.html

 

Here you can view the real time winter critical thicknesses

http://www.spc.noaa.gov/sfctest/new/viewsector.php?sector=17#

 

Just hover over "Winter Weather" and find the critical thicknesses area.

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the models are holding solid at 2" expected of frzn rain from what I can tell. 

Jim Cantore left Columbia and headed to Augusta.  Which is odd.  I mean; KCAE handles that I believe; but.. modeling is looking odd and pretty bad for that area possibly down that way.  I could only assume Macon and points North would have a pretty strong shot at Winter weather?

 

EDIT; nvm; checked your grids out.  Cool.

 

Kcae looks a little less icey; but I don't know what will verify for anyone located there guys!

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yeah. People are getting excited because it shows their backyard with 12", that's all. I'm sure soundings tell a different story.

 

Yeah, that map is very misleading for those in the IP/ZR zones.  I'd say north of I-85 would where it's more accurate, for what it's worth.  Snow maps in general are not the most accurate things ever made.

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