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The Jan 9-10 Storm Part 2


MotoWeatherman

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I apologized if this has been posted before, but FFC seems on board now for the potential of a Winter Storm Watch/Warning...

LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/...

AFOREMENTIONED SFC LOW WILL BE ALONG THE CENTRAL GULF COAST SUNDAY

NIGHT. BEST CHANCES OF PRECIP WILL BE DURING THIS TIME PERIOD. GFS

SHOWS NOSE OF WARM AIR INTO METRO AREA AND INTO CENTRAL GEORGIA ON

MONDAY NIGHT. TEMPS ARE FREEZING AT THE SURFACE THOUGH. ACROSS

NORTH GEORGIA IN THE MOUNTAINS THIS NOSE OF WARM AIR DOES NOT

APPEAR UNTIL MONDAY AFTERNOON. IN ADDITION...THICKNESS VALUES

ACROSS THE CWA INCREASE ON MONDAY. THIS IS NOT A CLEAR CUT RAIN OR

SNOW CASE. OVERALL THOUGH...SNOW EXPECTED ACROSS NORTH GEORGIA AND A

MIX OR RAIN/SNOW/SLEET ACROSS CENTRAL GEORGIA. WILL HAVE TO

CONTINUE TO MONITOR THIS THOUGH AS FREEZING RAIN MAY BE AN ISSUE

FOR SOME AREAS. SEE THE SPECIAL WEATHER STATEMENT /SPSATL/ FOR

DETAILS ON AMOUNTS AND LOCATIONS. BASED ON THE CURRENT FORECAST

THOUGH...A WINTER STORM WATCH/WARNING MAY HAVE TO BE ISSUED FOR

AREAS OF THE CWA

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I'm not into model diagnostics, but I know the euro is run on a different platform all together than the gfs. It seems to capture the rotation and depth of these cutoffs much better than the gfs does. Consequently it performs better in these situations.

Thanks, my understanding is that the EC has higher resolution and different (supposedly better) initialization techniques. Was wondering what else may be different.

Cheez, thanks as well. I agree that the EC does better most times in the medium range, with other models catching up to it in the short range. It seems most HPC forecasters hold the EC up as the gold standard.

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Yea but doesn't the GFS and NAM almost always keep us warmer then we actually end up being, especially in CAD or Wedge sceneries? Could be wrong but just what I thought.

Burger,

Back in the day...(early to mid 2000's) we had a lot more CAD scenarios (or so I remember). The NAM always scored better with reconition of the termpature profiles during CAD situations. Brandon and Robert (CAD experts IMO) can edit all of this as needed. Anyway, I see the NAM with the colder temps now. However, as the storm is pumping more precip when it is crossing over SC or already at the Atlanic, it seems that the precip picks up, but our 850's give us the middle finger and warm. Not sure how to provide any other input but to say...BRANDON, ALAN, WOW and ROBERT take the sticks and drive this airplane! :thumbsup:

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By 1pm Monday Euro barely has >.25" QPF for Atlanta and most of N GA.:gun_bandana:

No worries Dawson. This is a different setup from Christmas and I know that but the EURO started this exactly 2 days before the Dec 25th event and the NAM/GFS started trending toward the older EURO solution. It's like wash, rinse and repeat. I think we are golden right now.

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Euro shears this sucker out faster than any of them. Kind of a role reversal with the GFS I'd say!

Did the same thing last night, I'm putting my efforts into the NAM/GFS since they are getting into their good solution range. I'll post QPF for major cities here soon off the Euro.

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No worries Dawson. This is a different setup from Christmas and I know that but the EURO started this exactly 2 days before the Dec 25th event and the NAM/GFS started trending toward the older EURO solution. It's like wash, rinse and repeat. I think we are golden right now.

Very true....but this stuff drives me bonkers. Truthfully though we are probably in the time frame to stop watching the EURO...as Cheez referred to earlier. But I do like to get confirmation from as many models as possible but the EURO is not in its "wheel house" right now.

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No worries Dawson. This is a different setup from Christmas and I know that but the EURO started this exactly 2 days before the Dec 25th event and the NAM/GFS started trending toward the older EURO solution. It's like wash, rinse and repeat. I think we are golden right now.

You're right about that. I'm still not too worried, if you look at 60 to 72 it just really weakens our low, which is what it was doing in the time frame you talk about with the last storm. However reality was our low didn't weaken that much. Still like where we're at.

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I agree with this statement. However, nice it is to have models on your side....Awaiting the GFS Members for the 12 run.....

Very true....but this stuff drives me bonkers. Truthfully though we are probably in the time frame to stop watching the EURO...as Cheez referred to earlier. But I do like to get confirmation from as many models as possible but the EURO is not in its wheel house right now.

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Remember folks, the Euro qpf is not its strong suit, but I do admit this run is disappointing. One thing if you actually compare the vort max tracks with all of the models, the Euro is not all that different. So it all has to do with how the models generate precip. This is not evidence for cliff diving.....yet. I told my Facebook friends that ATL area would get 4-6", and based on what I am seeing this looks like a good first call.

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Remember folks, the Euro qpf is not its strong suit, but I do admit this run is disappointing. One thing if you actually compare the vort max tracks with all of the models, the Euro is not all that different. So it all has to do with how the models generate precip. This is not evidence for cliff diving.....yet. I told my Facebook friends that ATL area would get 4-6", and based on what I am seeing this looks like a good first call.

I haven't seen the Euro qpf, but is it showing more precip south of Atlanta which would possibly mean the heaviest snow being south of Atlanta ?

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Very true....but this stuff drives me bonkers. Truthfully though we are probably in the time frame to stop watching the EURO...as Cheez referred to earlier. But I do like to get confirmation from as many models as possible but the EURO is not in its "wheel house" right now.

I realize something similar happened at Christmas, but to have the model consensus start to veer off/change is a bit unconcerting. There was a lot of consensus for several days

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