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January 6-8 2014 arctic attack obs thread...


Marion_NC_WX

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0z Euro...through 84 has boundary moving east of the Apps, some lagging behind in North Carolina due to the terrain but mountains and west of mountains also down into NW GA Northern AL already dropping into teens/20's by 84 (12z Mon)

 

 

EDIT: one difference I do see between Euro and GFS is the holding back along the immediate of the Apps in NC/SC. GFS is so powerful that temps actually fall on Monday where as some downslope holds temps steady on Euro.

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Not a huge difference through 108 (12z Tues), but colder. Below zero temps with any elevation in the Apps. Single digits Western half of Carolinas and down into Metro Atlanta. Teens the rest of Georgia and Carolinas, as least far enough inland from any ocean influence...

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The 06Z GFS holds serve on the numbing cold.  Hickory still looks to have approximately 72 hours below freezing from roughly noon on Monday to noon on Thursday with a low temp of around 5 degrees.  Unlike the Euro, there is still some moisture around for the potential ZR event too on Thursday night/Friday morning; however, temps look slightly too warm verbatim (this is just for Hickory and nearby locales).

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FFC still very very conservative next week.  I just don't get it?  If some one could shed a light on this I would appreciate it.

What don't you get? Its the same when the models show 6-10" of snow 5 days out, I bet FFC doesn't put 6-10" in their point in click for something in that time frame.....whats if they go with extreme cold in their forecast today and then it doesn't happen? They will put it in there most likely tomorrow night into Sunday, I suspect that is when most local NWS offices around here will jump on it and they will jump on it hard but not till they get within say 72 hrs or so.

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FFC still very very conservative next week.  I just don't get it?  If some one could shed a light on this I would appreciate it.

 

 

I think its been explained numerous times.  It's the same argument as to why the haven't issued WSW for an upcoming event.  Trust me they have their reasons.  I  don't know why some people get so up in arms.  They will address the cold weather to give people plenty of time to make preperations.  You really keep harping on this over and over/ 

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I think its been explained numerous times. It's the same argument as to why the have issues WSW for an upcoming event. Trust me they have their reasons. I don't know why some people get so up in arms. They will address the cold weather to give people plenty of time to make preperations. You really keep harping on this over and over/

I know lol. If there is no warning watch etc and yet it is snowing who cares? If they call for 6" and we wake up to sun everyone cares :)

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FFC's forecast discussion looks pretty spot on to me????   

 

 

DEESE

LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/...
FOR THE LONG TERM LOOKS LIKE A SIGNIFICANT COLD SNAP IS BECOMING
MORE LIKELY FOR EARLY NEXT WEEK. THE LONG TERM STARTS OFF WITH A
WEAKENING/EXITING HIGH PRESSURE RIDGE AND MOISTURE INCREASING
SLOWLY ACROSS THE STATE. BY SATURDAY EVENING THERE SHOULD BE
INCREASING CLOUD COVERAGE THEN GRADUAL INCREASE IN POPS FOR SUNDAY
INTO SUNDAY NIGHT. LOOKS LIKE THE PRECIP WILL START OF AS RAIN
THEN TURN TO SNOW OR A MIX OF RAIN AND SNOW SUNDAY NIGHT AS
TEMPS DIP INTO THE 20S AND 30S. MAIN SURFACE LOW PRESSURE IS
PROGGED TO DEEPEN AND TRACK NORTH AND EAST OF THE AREA WITH THE
ASSOCIATED COLD FRONT SWINGING THROUGH SUNDAY NIGHT. THIS FRONT
DOES NOT HAVE A LOT OF MOISTURE WITH IT BUT THE BIG DEAL IS THE
VERY COLD AIRMASS BEHIND IT. AS THIS FRONT MOVES THROUGH WILL
DEFIANTLY HAVE TO MONITOR PRECIP TYPE AS TEMPS WILL BE FALLING
FAST OVER NIGHT. CANNOT RULE OUT SOME LIGHT ACCUMULATIONS WITH
THIS SYSTEM...BUT WILL LEAVE OUT FOR NOW DUE TO UNCERTAINTY WITH
TEMP TIMING. THE VERY COLD TEMPS BEHIND THE EXITING FRONT ARE
EXPECTED FOR MONDAY THROUGH TUESDAY AS VALUES 15-20 DEGREES BELOW
NORMAL ARE POSSIBLE. MONDAY AND TUESDAY NIGHT LOOK TO BE THE
COLDEST TIMES. LOOKING FOR SINGLE DIGIT TO LOWER 20S MONDAY NIGHT
AND TEENS TO 20S TUESDAY NIGHT. HIGHS TUESDAY ARE LOOKING TO
REMAIN BELOW FREEZING FOR MUCH OF THE NORTHWEST HALF OF THE AREA
AND MID 30S TO LOW 40S IN THE SOUTHEAST. TEMPS WILL REBOUND
WED/THU GETTING BACK TO SEASONAL NORMS BY THU/FRI. THERE IS
ANOTHER FRONTAL SYSTEM EXPECTED TO MOVE THROUGH GA THU SO WILL
CONTINUE WITH SLIGHT CHANCE TO CHANCE POPS FOR NOW
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FFC's forecast discussion looks pretty spot on to me????   

 

 

DEESE

LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/...

FOR THE LONG TERM LOOKS LIKE A SIGNIFICANT COLD SNAP IS BECOMING

MORE LIKELY FOR EARLY NEXT WEEK. THE LONG TERM STARTS OFF WITH A

WEAKENING/EXITING HIGH PRESSURE RIDGE AND MOISTURE INCREASING

SLOWLY ACROSS THE STATE. BY SATURDAY EVENING THERE SHOULD BE

INCREASING CLOUD COVERAGE THEN GRADUAL INCREASE IN POPS FOR SUNDAY

INTO SUNDAY NIGHT. LOOKS LIKE THE PRECIP WILL START OF AS RAIN

THEN TURN TO SNOW OR A MIX OF RAIN AND SNOW SUNDAY NIGHT AS

TEMPS DIP INTO THE 20S AND 30S. MAIN SURFACE LOW PRESSURE IS

PROGGED TO DEEPEN AND TRACK NORTH AND EAST OF THE AREA WITH THE

ASSOCIATED COLD FRONT SWINGING THROUGH SUNDAY NIGHT. THIS FRONT

DOES NOT HAVE A LOT OF MOISTURE WITH IT BUT THE BIG DEAL IS THE

VERY COLD AIRMASS BEHIND IT. AS THIS FRONT MOVES THROUGH WILL

DEFIANTLY HAVE TO MONITOR PRECIP TYPE AS TEMPS WILL BE FALLING

FAST OVER NIGHT. CANNOT RULE OUT SOME LIGHT ACCUMULATIONS WITH

THIS SYSTEM...BUT WILL LEAVE OUT FOR NOW DUE TO UNCERTAINTY WITH

TEMP TIMING. THE VERY COLD TEMPS BEHIND THE EXITING FRONT ARE

EXPECTED FOR MONDAY THROUGH TUESDAY AS VALUES 15-20 DEGREES BELOW

NORMAL ARE POSSIBLE. MONDAY AND TUESDAY NIGHT LOOK TO BE THE

COLDEST TIMES. LOOKING FOR SINGLE DIGIT TO LOWER 20S MONDAY NIGHT

AND TEENS TO 20S TUESDAY NIGHT. HIGHS TUESDAY ARE LOOKING TO

REMAIN BELOW FREEZING FOR MUCH OF THE NORTHWEST HALF OF THE AREA

AND MID 30S TO LOW 40S IN THE SOUTHEAST. TEMPS WILL REBOUND

WED/THU GETTING BACK TO SEASONAL NORMS BY THU/FRI. THERE IS

ANOTHER FRONTAL SYSTEM EXPECTED TO MOVE THROUGH GA THU SO WILL

CONTINUE WITH SLIGHT CHANCE TO CHANCE POPS FOR NOW

 

I just basing it on what the models have been showing, they have been trending colder and colder, yet FFC is still way to warm based on that.   

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I think its been explained numerous times.  It's the same argument as to why the haven't issued WSW for an upcoming event.  Trust me they have their reasons.  I  don't know why some people get so up in arms.  They will address the cold weather to give people plenty of time to make preperations.  You really keep harping on this over and over/ 

Please don't put me in a "harping" category I think that guy Brick is the king of that, just simply asked a question.  No need to be rude.  Just curious, why does your temp avatar say 66 degrees?  Thanks

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Please don't put me in a "harping" category I think that guy Brick is the king of that, just simply asked a question.  No need to be rude.  Just curious, why does your temp avatar say 66 degrees?  Thanks

 I think Cherokee County airport isn't reporting right.  I've been 66 and sunny for months now.   Really, I hit 18 last night  

 

( tried to update it, we'll see what happens)

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12z nam is a bit colder aloft than it's prior runs and  the gfs.  -20c (almost -21c) 850mb temps down to atlanta and athens by 0z tue. Gfs has it near the tn/nc/ga border during the same period. And checkout how far south it has it around hour 78 to 81, down into central alabama!

 

nam_namer_084_850_temp_mslp_precip_s.gif

 

NAM_221_2014010312_F81_TMPC_850_MB.png

 

 

 

NAM_221_2014010312_F84_TMPC_850_MB.png

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12z nam is a bit colder aloft than it's prior runs and  the gfs.  -20c (almost -21c) 850mb temps down to atlanta and athens by 0z tue. Gfs has it near the tn/nc/ga border during the same period. And checkout how far south it has it around hour 78 to 81, down into central alabama!

 

Maybe I'll finally get to bring the leather jacket out of hibernation  :wub: 

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I just basing it on what the models have been showing, they have been trending colder and colder, yet FFC is still way to warm based on that.   

They have to temper the model output with climo and experience to generate a forecast. They can't start sounding the alarm on every event that shows up on the GFS 4+ days out.

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^man, that is an extremely cold run.

Damn sure is. And I need to make a correction, via the soundings on twister 850mb temps get down to -21.5c down to atlanta itself. I can't remember what larry said was the record but that has to be close to it.

 

Maybe I'll finally get to bring the leather jacket out of hibernation   :wub:

Nah, go out in shorts. It's going to be pretty hot ;)

 

I'm going to get out in it and enjoy it though lol. It's so rare for it to get this cold, it's certainly worth it to make sure you experience it.

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And a pretty snowy one too for the western Carolina's.  All the precipitation from the NAM looks to be post-frontal, well into the cold air.  Wont' be terribly long-lived, but should be a 3-5 hour window of synoptic snows after the front goes through late Sunday night.

 

Are you speaking mainly to the western parts of NC? It would be great if western SC were in the mix, and admittedly I could be missing something - I'm just not seeing it.

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And a pretty snowy one too for the western Carolina's.  All the precipitation from the NAM looks to be post-frontal, well into the cold air.  Wont' be terribly long-lived, but should be a 3-5 hour window of synoptic snows after the front goes through late Sunday night.

 

 

Agreed, snow growth according to the bufkit I ran on the 06z nam will be decent with rising omega during the latter half of the event.

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