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1/28 - 1/30 Storm Thread II


burgertime

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Interesting by HPC...

 

SOUTHERN STREAM TROUGH/CLOSED LOW REACHING BAJA/MEXICO TUE
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
PREFERENCE: 12Z GFS / 00Z CMC BLEND
CONFIDENCE: BELOW AVERAGE

THE CLOSED LOW FORECAST TO REACH BAJA/MEXICO ON TUE IS EXPECTED TO
TRACK EAST INTO THE MIDDLE OF THE WEEK BUT THERE ARE LARGE
DIFFERENCES ON THE TIMING OF THIS BETWEEN THE LATEST MODELS AND IN
THE ENSEMBLES. THE TRENDS HAVE BEEN TO BE MORE PROGRESSIVE...SUCH
AS IN THE ECMWF/ECMWF MEAN BUT THE NAM APPEARS TOO FAST. OBSERVED
MODEL TRENDS TO BE FASTER ARE LEANING THE PREFERENCE AWAY FROM THE
SLOWER IDEA...BUT AGAIN..FEEL THE NAM AND EVEN 12Z GFS ARE TOO
PROGRESSIVE HERE. BLENDING THE 12Z GFS WITH THE SLOWER 00Z CMC

APPEARS A GOOD COMPROMISE WITH THIS SYSTEM TRACKING ACROSS MEXICO.


BROAD SHORTWAVE DIGGING INTO THE SOUTHERN PLAINS/LOWER MS VALLEY
POTENTIAL ICE STORM FOR THE GULF COAST REGION
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
PREFERENCE: 12Z GFS / 00Z CMC BLEND
CONFIDENCE: BELOW AVERAGE

THERE ARE STILL SIGNIFICANT DIFFERENCES REGARDING A BROAD
SHORTWAVE...EXPECTED TO AMPLIFY SOUTHWARD ACROSS THE
CENTRAL/SOUTHERN PLAINS AND MISSISSIPPI VALLEY ON TUE INTO
WED...WITH THE POTENTIAL FOR A MAJOR ICE STORM ALONG THE GULF
COAST INTO THE SOUTHEAST. THE 12Z NAM IS ONE EXTREME OF THE
SPREAD...AS THE SLOWEST AND DEEPEST TO DIG THE TROUGH SOUTH
RESULTING IN WIDESPREAD SN/PL/FZRA FROM THE GULF COAST TO THE
SOUTHEASTERN U.S. COASTLINE. THE 00Z UKMET IS THE OTHER EXTREME
WITH A FLATTER/QUICKER UPPER TROUGH PROGRESSION WHICH VERY LITTLE
WINTER PRECIP FOR THE SOUTH.

TRENDS IN THE ENSEMBLE SPAGHETTI HEIGHT PLOTS SUPPORT A SOLUTION
IN THE MIDDLE WITH THE GFS TRENDING TOWARD THIS MIDDLE
CONSENSUS...ALONG WITH VERY SLOW SHIFTS TOWARD THIS IDEA FROM THE
ECMWF/UKMET AS WELL. THE 00Z CMC HAS A SIMILAR IDEA OF THE 12Z
GFS...BUT A BIT LESS SHARP WITH THE SHORTWAVE TROUGH AS IT MOVES
ACROSS THE OHIO VALLEY ON WED. FOR NOW...A BLEND OF THE 12Z GFS /
00Z CMC IS PREFERRED
WITH LIMITED CONFIDENCE DUE TO THE LARGER
THAN AVERAGE SPREAD FOR A DAY 2/3 SYSTEM.

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Interesting by HPC...

 

SOUTHERN STREAM TROUGH/CLOSED LOW REACHING BAJA/MEXICO TUE

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

PREFERENCE: 12Z GFS / 00Z CMC BLEND

CONFIDENCE: BELOW AVERAGE

THE CLOSED LOW FORECAST TO REACH BAJA/MEXICO ON TUE IS EXPECTED TO

TRACK EAST INTO THE MIDDLE OF THE WEEK BUT THERE ARE LARGE

DIFFERENCES ON THE TIMING OF THIS BETWEEN THE LATEST MODELS AND IN

THE ENSEMBLES. THE TRENDS HAVE BEEN TO BE MORE PROGRESSIVE...SUCH

AS IN THE ECMWF/ECMWF MEAN BUT THE NAM APPEARS TOO FAST. OBSERVED

MODEL TRENDS TO BE FASTER ARE LEANING THE PREFERENCE AWAY FROM THE

SLOWER IDEA...BUT AGAIN..FEEL THE NAM AND EVEN 12Z GFS ARE TOO

PROGRESSIVE HERE. BLENDING THE 12Z GFS WITH THE SLOWER 00Z CMC

APPEARS A GOOD COMPROMISE WITH THIS SYSTEM TRACKING ACROSS MEXICO.

 

 

 

That southern energy didn't look too bad last night. The problem is if it's slower and that northern energy is more progressive I think it hurts a lot of us north of say Augustus. 

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Well, I do not look at the weather for 24 hours and what happens. Pigs fly and the NAM at 84 from yesterday may beat all the other models. Still not convinced that ATL sees much if any snow, but it does now look like a potentially historic event for some pretty far south areas. If the NAM snow accumulation charts verify then this could set or come close to the all time snow for FL (3.5" in 1899) and rival the Feb 9-10 1973 storm for places like Macon and Charleston. If we do barely miss it here and they get pummeled south, good for folks in the path but it would sting to see areas from LA to coastal SC get snow while we go hungry. Oh well....

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Well, I do not look at the weather for 24 hours and what happens. Pigs fly and the NAM at 84 from yesterday may beat all the other models. Still not convinced that ATL sees much if any snow, but it does now look like a potentially historic event for some pretty far south areas. If the NAM snow accumulation charts verify then this could set or come close to the all time snow for FL (3.5" in 1899) and rival the Feb 9-10 1973 storm for places like Macon and Charleston. If we do barely miss it here and they get pummeled south, good for folks in the path but it would sting to see areas from LA to coastal SC get snow while we go hungry. Oh well....

so a historic storm potentially for Macon and maybe not a flurry 80 miles north in Atlanta ? That could be the most incredible cutoff in snow since that snowstorm in the early 70s.
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EURO does have more qpf inland this run, but I think its still struggling with the baja low.  IMO thats prolly its bias showing.  Now, it did trend better, but not like the gfs and certainly not like the NAM.  Also, remember, the euro is the best mid range model, but not usually inside D1-3.  Not saying its wrong by being the driest model, but with the GFS being wetter and the nam not budging to much, I would say the euro is the outlier, but did improve.

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EURO does have more qpf inland this run, but I think its still struggling with the baja low.  IMO thats prolly its bias showing.  Now, it did trend better, but not like the gfs and certainly not like the NAM.  Also, remember, the euro is the best mid range model, but not usually inside D1-3.  Not saying its wrong by being the driest model, but with the GFS being wetter and the nam not budging to much, I would say the euro is the outlier, but did improve.

 

Yep I agree. That low should move at least a little more east. It kind of just gets stuck. Devil will be in the details tomorrow. 

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