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Fabulous February Arctic Outbreak


DaculaWeather

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I really hope one of these inside a week actually verifies. I haven't seen this many misses inside 180 in a few years. Just tough patterns this year.

if the weeklies are right,we better cash in these next three weeks,not much cold into S/Canada,not saying it wont get cold again,but i'm just saying

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Nashville overnight disco:  

 

DRY CONDITIONS TUESDAY AND WEDNESDAY LEAD US INTO THURSDAY. THE
EURO...WHICH HAS BEEN THE DRIER OF THE TWO EXTENDED SOLUTIONS IS
FINALLY COMING AROUND TO THE GFS AGAIN. THIS SEEMS TO BE A RUNNING
TREND LATELY. THE DOWNSIDE OF THIS...WE COULD BE IN FOR MORE WINTRY
WEATHER THURSDAY. TEMPERATURE PROFILES BECOME SUPPORTIVE OF SNOW BY
12Z THURSDAY AND WHILE QPFS AREN`T IMPRESSIVE WITH THE WEAK FRONT
THAT PUSHES INTO THE AREA...SOME SNOW IS STILL POSSIBLE DURING THE
DAY ON THURSDAY.

 

 

Morristown was more like, ehh  a front is going to come through, aint nobody got time for that.

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I do have to say though the NAM is just starting to model this as its on the outer edge of NAM modeling, but I do like what I see at H84 on the NAM.  That is to say I like the placements of the Lows, as it looks more like the sort of double barrel Lows tracking through.  Again just looking at H84 to try to guess H90 and so on...  Can't wait for the next few model runs. 

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Here is why I like the NAM at H84...  The low at the southeastern tip of LA is nearly stationary and juicy.  The Low in the panhandle of TX is sliding southeast rapidly, literally modeled as moving from northeastern CO to the Panhandle of TX in 6 Hours.  The energy and cold behind it are modeled moving southeast at a nearly impressive clip.  If that low at the tip of LA can stay nearly stationary or move very slow and there is no reason why it wouldn't move very slowly until its caught by the energy moving southeast out of the plains we still have a decent shot at something out of this, or at least someone in the greater SE US has a chance at something out of this I believe.  

post-11228-0-77151400-1422809988_thumb.j

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The GEM looks pretty good, tracks a low across the N. GOM, drops energy down above it and gives a few inches of snow to the western half of the Valley. But as modeled, I'd like the track for all of us. It doesn't have nearly the precip shield that a N.GOM low produces, which is often a model issue as has been well discussed.

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Nashville NWS Afternoon disco:

 

 

 

.LONG TERM...WEDNESDAY THROUGH SUNDAY.
WEDNESDAY STILL LOOKS DRY...BUT CONDITIONS COULD GO DOWNHILL
WEDNESDAY NIGHT AND THURSDAY. UNFORTUNATELY...MODELS ARE STILL
HAVING TROUBLE WITH THE SOLUTIONS FOR THIS TIME PERIOD. IT COULD
BE DRY...OR THERE COULD BE SIGNIFICANT PRECIPITATION. THE MAIN
ISSUE IS HOW THE MODELS ARE HANDLING A GULF COAST LOW PRESSURE
SYSTEM...AND MORE SIGNIFICANTLY...A POTENTIALLY STRONG SHORTWAVE
THAT WILL BE COMING DOWN FROM THE NORTHWEST. THESE DETAILS WILL
WILL NOT BE WELL MODELED FOR ANOTHER 24 HOURS AT LEAST.
FOR
NOW...WE WILL STICK WITH A LOW-MID CHANCE FOR RAIN/SNOW. MODELS
ARE STILL IN GOOD AGREEMENT THAT A SHOT OF COLDER AIR WILL MOVE IN
WEDNESDAY NIGHT AND THURSDAY. LOOKS DRY WITH A WARMING TREND
FRIDAY AND SATURDAY...THEN ANOTHER WAVE COULD BRING SHOWERS BY
SUNDAY.
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The 18 Z NAM at 84H still shows a good possibility of the shortwave energy in the plains possibly interacting with our Gulf low.  The low is very slow moving still on the 18Z still over the N gulf, and appears to be on a potentially slow NE trek across SE GA.  IF we can get that GOM low to throw some moisture back into that energy as it moves across the Tennessee Valley region we could get decent snows across most of the region.

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I'm not sure why people are even mentioning the gulf low. There is no shot with the gilf low. The only shot we have is the shortwave digging down the backside of the teough. Problem is all guidance is too flat with the ridge not allowing it to dig . If the 00z NAM is A trend we have a huge 00z set fail incoming

My mentioning of the Gulf Low isn't to hope for a miller.  I know that isn't likely, but for Tennessee, anything in the gulf to help enhance/transport moisture northward to our region for the shortwave helps.  So the Low is important, not for a mega miller, as that just doesn't appear in the cards. 

 

0Z GFS has nicely upped the QPF for the Tennessee Valley Region,  back to a sort of 1-3 inch event for most of the region.  Who knows maybe a trend back toward the wetter GFS runs we saw back a few.

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UPPER TROUGH DIGGING INTO THE UPPER MIDWEST BY WED MORNING
ASSOCIATED COLD FRONT CROSSING THE APPALACHIANS WED NIGHT

WEAK MID-UPPER LEVEL SHORTWAVE TRACKING FROM THE PACIFIC NORTHWEST
  TUE EVENING TO THE CNTRL PLAINS WED EVENING
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
PREFERENCE: BLEND OF THE 12Z NAM / 12Z CMC
CONFIDENCE: BELOW AVERAGE

CONFIDENCE IS QUITE LOW HERE...GIVEN ECMWF ENSEMBLES HAVE TRENDED
DEEPER WITH AN UPPER TROUGH OVER THE MIDWEST THU MORNING...WHILE
OVER THE SAME TIME...GEFS MEMBERS HAVE TRENDED WEAKER. BY LATE
THU...THE GFS AND GEFS REPRESENT A FLATTER/FASTER IDEA...WHILE THE
ECMWF/UKMET HAVE CONSISTENTLY REPRESENTED A MORE AMPLIFIED UPPER
TROUGH OVER THEIR PAST 3 MODEL CYCLES.

THE GFS IS A BIT OF AN OUTLIER ACROSS THE WEST COAST WITH A WEAKER
UPPER RIDGE LATE THU...CONSISTENT DOWNSTREAM WITH A FLATTER
TROUGH. SINCE THE GFS HAS LITTLE SUPPORT ACROSS THE WEST COAST AT
THIS TIME...THE GFS/GEFS SOLUTION WILL BE CONSIDERED A LOW
PROBABILITY OF VERIFYING. HOWEVER...THE ECMWF/UKMET REMAIN QUITE
DEEP WITH THEIR 12Z CYCLES AND GIVEN RECENT INCONSISTENCIES IN THE
ECMWF MODEL...WE DO NOT FEEL COMFORTABLE GOING TOWARD THE MORE
AMPLIFIED IDEA DESPITE UKMET SUPPORT. N THE MIDDLE...WE HAVE THE
12Z NAM AND 12Z CMC...HENCE THE PREFERENCE.

 

The NAM 18z did a total flip,it's much more juiced up than it's recent runs

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Morristown mentioning the possible pull of moisture from the gulf.  Granted still limited moisture. 

 

THE GFS KEEPS THE SOUTHERN WAVE
SUPPRESSED TO OUR SOUTH ONLY GIVING US THE MOISTURE ASSOCIATED WITH
THE NW SYSTEM TO WORK WITH. THE NAM BRINGS THE SOUTHERN WAVE
SLIGHTLY FURTHER NORTH AND ALLOWS THE TROUGH TO TAP INTO TO SOME OF
ITS MOISTURE. EVEN IF THE NAM IS THE CORRECT MODEL THERE ISN`T A TON
OF MOISTURE TO WORK WITH. THE PRECIP MAY START AS SNOW AT
TRI...ESPECIALLY FOR ALL POINTS NORTHWARD. A RAIN TO SNOW TRANSITION
LOOKS TO OCCUR ACROSS THE CENTRAL VALLEY AROUND 09/12Z AND THE
SOUTHERN VALLEY AROUND 12Z. HIGH TEMPS FORECAST TO BE IN THE LOW 30S
NORTH TO NEAR 40 SOUTH BUT THESE WILL LIKELY BE EARLY MORNING HIGHS
AS TEMPS DROP BEHIND THE FRONTAL PASSAGE EARLY THURSDAY MORNING.

 

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