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Winter 2014-2015 Pattern Discussion Thread III


BIG FROSTY

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Should make Pack happy. After next week, the end of winter seems inescapable. :(

Yep! Weeklies FTW! They are a full on nuke torch. We better cash in days 5-9. So much going on next week, hopefully this weekend there is a threat we can track with more certainty. It's a do or die week for this winter, RDU is sitting on 1" for the winter. GSO is sitting on 2" and will probably get another 2-3" this weekend, they will have another solid winter if it ended after this weekend.

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Yep! Weeklies FTW! They are a full on nuke torch. We better cash in days 5-9. So much going on next week, hopefully this weekend there is a threat we can track with more certainty. It's a do or die week for this winter, RDU is sitting on 1" for the winter. GSO is sitting on 2" and will probably get another 2-3" this weekend, they will have another solid winter if it ended after this weekend.

Who cares? We all will want spring after 4 wintry events in the next week! Kind of like saying - the summer will get hot
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Yep! Weeklies FTW! They are a full on nuke torch. We better cash in days 5-9. So much going on next week, hopefully this weekend there is a threat we can track with more certainty. It's a do or die week for this winter, RDU is sitting on 1" for the winter. GSO is sitting on 2" and will probably get another 2-3" this weekend, they will have another solid winter if it ended after this weekend.

 

We'll be lucky to get 2 or 3 raindrops this weekend.

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But the MJO looks excellent, i.e., near or inside the circle, which tends to have cold implications in general per my earlier research.

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Based on current projections, the last half of this Feb has a good shot at ending up as the coldest v normal of any since at least 1880 at ATL! If it ends up -12, it will reach that elite status. The coldest now is ~-11.

Also, current projections bring feb as a whole as cold as -7 and likely at least -6.5ish. Though not nearly 100%, the correlation between very cold feb (say, colder than -6) & sig wintry prec at ATL is pretty strong. Hopefully, that will pay off in addition to the nice treats we got this week.

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Based on current projections, the last half of this Feb has a good shot at ending up as the coldest v normal of any since at least 1880 at ATL! If it ends up -12, it will reach that elite status. The coldest now is ~-11.

Also, current projections bring feb as a whole as cold as -7 and likely at least -6.5ish. Though not nearly 100%, the correlation between very cold feb (say, colder than -6) & sig wintry prec at ATL is pretty strong. Hopefully, that will pay off in addition to the nice treats we got this week.

And we will have one inch of sleet and a glaze of ice to show for it!

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Based on current projections, the last half of this Feb has a good shot at ending up as the coldest v normal of any since at least 1880 at ATL! If it ends up -12, it will reach that elite status. The coldest now is ~-11.

Also, current projections bring feb as a whole as cold as -7 and likely at least -6.5ish. Though not nearly 100%, the correlation between very cold feb (say, colder than -6) & sig wintry prec at ATL is pretty strong. Hopefully, that will pay off in addition to the nice treats we got this week.

 

Amazingly, as cold as this late Feb, is going to end up, 3/1-15/1960 was ~18 below normal and averaged ~33, or 4 colder! It produced 3 major winter storms at ATL!

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Amazingly, as cold as this late Feb, is going to end up, 3/1-15/1960 was ~18 below normal and averaged ~33, or 4 colder! It produced 3 major winter storms at ATL!

 How'd the rest of the SE look in March '60? My eyes were barely open then.  I think my diaper was cold.      lol

 

Any map you can share?

 

Thanks!

 

Phil

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Amazingly, as cold as this late Feb, is going to end up, 3/1-15/1960 was ~18 below normal and averaged ~33, or 4 colder! It produced 3 major winter storms at ATL!

 

So in short, you're saying that based on statistics, if the end of this February turns out colder than average in ATL, then we will most likely have a much colder than average 1st half of March? ;)

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 How'd the rest of the SE look in March '60? My eyes were barely open then.  I think my diaper was cold.      lol

 

Any map you can share?

 

Thanks!

 

Phil

 

All were way below normal at least for the 1st half and, in many cases, the entire month was colder than an avg. Jan! CHS had 0.5" of SN!

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Looking at the GFS LR it looks like many in the SE will continue with below normal temps. At day 9 the GFS would indicate a CAD setup with maybe some ice concerns. After this it looks like an overall warmer pattern for the eastern US but many in the SE would still average below normal with more CAD possibilities (probably less chances of wintery precip).

 

Day 9:

http://mag.ncep.noaa.gov/Image.php?image=data%2Fgfs%2F12%2Fgfs_namer_219_850_temp_mslp_precip.gif&model=gfs&area=namer&storm=&cycle=12&param=850_temp_mslp_precip&fhr=219&group=Model+Guidance&imageSize=M&preselected_formatted_cycle_date=20150222+12+UTC&ps=model&use_mins=no&scrollx=0&scrolly=364

    

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Coldest KATL Feb.'s vs. normal: -6 or colder (current one projected to be -6 to -7)(EN = El Nino): look at all of the wintry precip!! This is one reason I'm very excited about this last week's potential..it fits climo quite well.

 

1895: -11; 2 major SN and another ~1.5" SN
1905 (EN):  -9.5; 2 major ZR's and 3rd mod. ZR
1902: -8.5; major IP
1958 (EN): -8; major SN/IP
2010 (EN): -7.5; major SN
1968: -7; 3 SN's adding to 3.5"
1947: -7; 2 Traces of SN
1963: -6.5; 2 Traces of SN
1885 (EN): -6.5; major SN plus other measurable SN
1978 (EN): -6; 1 measurable SN and 3 more traces of SN
1899: -6; major SN

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 Interestingly, the 0Z CMC has revived the 2/28-3/1 CAD storm. Also, the 0Z Euro is closer to having it back. Hmmm. any thoughts?

RAH today.

THE CAD PROCESS CONTINUES WITH COLD AIR FIRMLY ENTRENCHED ON

SATURDAY. AIDED BY BY ANY PERTURBATIONS IN THE CONTINUED VERY FAST

WEST-SOUTHWEST FLOW AOLFT..THERE COULD YET BE LINGERING LIGHT

FLURRIES IN THE FOOTHILLS OR FAR WEST PIEDMONT. HIGHS SATURDAY WILL

BE SIMILAR OR A DEGREE COOLER...STILL WITHIN A COUPLE DEGREES OF 40.

AS WE OFTEN SEE IN STRONG COLD AIR DAMMING SCENARIOS...THE

BAROCLINIC ZONE ALONG THE COAST INDUCES AN INVERTED TROF...WHICH IN

TURN BEGINS TO INCREASE MOISTURE ADVECTION/ISENTROPIC LIFT OVER THE

COLD DOME BY SUNDAY MORNING. WILL BE INTRODUCING LOW CHANCE POPS

INITIALLY SUNDAY MORNING...WHICH COULD BE IN THE FORM OF A MIX OF

RAIN/SNOW/ICY STUFF...IN THE WESTERN HALF OF THE AREA IF IT

COMMENCES EARLY ENOUGH. WILL HAVE POPS RAMPING UP TO CHANCE CATEGORY

BY SUNDAY NIGHT...ALTHOUGH PRECIP WILL BE IN THE FORM OF RAIN AS THE

RIDGING WEAKENS AND OVERNIGHT MINS HOLD IN THE MID 30S TO AROUND 40.

A STRONG LOW PRESSURE AREA LIFTING OUT OF THE MIDWEST TOWARDS THE

OHIO VALLEY EARLY NEXT WEEK WILL ALLOW A RICH GULF TAP...ENSURING

GOOD CHANCES OF RAIN MONDAY INTO TUESDAY. AT PRESENT MODELS KEEP THE

EAST COAST IN THE WARM SECTOR WITH HIGHS IN THE 50S BOTH DAYS...BUT

IT DOES RESEMBLE AN IN-SITU DAMMING EVENT WHICH WOULD SHAVE 10

DEGREES (OR MORE) OFF HIGHS MONDAY AND TUESDAY.

 

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Just looking out to hour 84 on the NAM it does look like a good setup for this weekend. If anything this shows the cold we'll have after the storm to hopefully enjoy it before it melts away.

 

http://mag.ncep.noaa.gov/Image.php?fhr=084ℑ=data%2Fnam%2F18%2Fnam_namer_084_850_temp_mslp_precip.gif&model=nam&area=namer&param=850_temp_mslp_precip&group=Model+Guidance&preselected_formatted_cycle_date=20150224+18+UTC&imageSize=M&ps=model

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