Jump to content
  • Member Statistics

    17,607
    Total Members
    7,904
    Most Online
    ArlyDude
    Newest Member
    ArlyDude
    Joined

Fall 2015 Pattern Discussion


Recommended Posts

  • Replies 802
  • Created
  • Last Reply


SINCE THE BULK OF THE MODEL GUIDANCE HAS BEEN TRENDING WETTER...HAVE

BEEFED UP CLOUDINESS LATE SATURDAY THROUGH EARLY SUNDAY. HAVE ALSO

EXPANDED THE SLIGHT CHANCE POPS TO ENCOMPASS THE SOUTHERN PIEDMONT

SATURDAY EVENING...AND MOST LOCATIONS ALONG AND EAST OF HIGHWAY 1ATE

SATURDAY NIGHT-EARLY SUNDAY. IF THE ECMWF-NAM SOLUTION TRENDS

VERIFY...MUCH HIGHER POPS WILL BE NEEDED FOR SATURDAY NIGHT INTO

SUNDAY....ESPECIALLY AREAS SOUTH AND EAST OF RALEIGH.

Link to comment
Share on other sites

PNA looks to be definitely going positive in the LR. NAO and AO show little hope; but maybe very late they could be trying to go towards negative.

 

http://www.cpc.ncep.noaa.gov/products/precip/CWlink/daily_ao_index/teleconnections.shtml

The strat is pushing around the PV in fact the GFS does show a partial split days 7-9 but reforms over Greeenland. That is a death knell for a -NAO/-AO but it's weakening so maybe a short term loss with a long term gain.

The GEFS does keep the -EPO going this run post day 10, wonder if a icy situation arises first week of Dec for CAD areas.

Link to comment
Share on other sites

The strat is pushing around the PV in fact the GFS does show a partial split days 7-9 but reforms over Greeenland. That is a death knell for a -NAO/-AO but it's weakening so maybe a short term loss with a long term gain.

The GEFS does keep the -EPO going this run post day 10, wonder if a icy situation arises first week of Dec for CAD areas.

Newest runs continue to have the PNA go positive in the medium and LR. Also the AO now looks to go negative in the LR. Only thing not working is the NAO (..as usual). 

http://www.cpc.ncep.noaa.gov/products/precip/CWlink/daily_ao_index/teleconnections.shtml

Link to comment
Share on other sites

  • 2 weeks later...

Very sharp precip gradient on this current storm!

Goes from 3.5" to .1 , in about 30 miles, on GFS over the Upstate!

lol - Mack that was a 9 day difference from post 791 to 792. That's worse than mid summer.

 

(but) There are some good signs from the GFS this morning. From day 10 onward it looks like the pattern attempts to change to a more favorable configuration. The SE does not yet get into the cold air at day 16 but the overall look of the pattern is what we want to see at this range.  

 

Usually would not show day 16 but doing so just to focus on the overall pattern: 

http://mag.ncep.noaa.gov/Image.php?fhr=384ℑ=data%2Fgfs%2F06%2Fgfs_namer_384_850_temp_mslp_precip.gif&model=gfs&area=namer&param=850_temp_mslp_precip&group=Model+Guidance&preselected_formatted_cycle_date=20151201+06+UTC&imageSize=M&ps=model

Link to comment
Share on other sites

lol - Mack that was a 9 day difference from post 791 to 792. That's worse than mid summer.

 

(but) There are some good signs from the GFS this morning. From day 10 onward it looks like the pattern attempts to change to a more favorable configuration. The SE does not yet get into the cold air at day 16 but the overall look of the pattern is what we want to see at this range.  

 

Usually would not show day 16 but doing so just to focus on the overall pattern: 

http://mag.ncep.noaa.gov/Image.php?fhr=384ℑ=data%2Fgfs%2F06%2Fgfs_namer_384_850_temp_mslp_precip.gif&model=gfs&area=namer&param=850_temp_mslp_precip&group=Model+Guidance&preselected_formatted_cycle_date=20151201+06+UTC&imageSize=M&ps=model

 

The latest GFS run does look seasonal I guess, no real arctic outbreaks but very normal temps with highs in the 50's and lows generally in the 30's for most of the extended...certainly not a "torch" IMO.....

Link to comment
Share on other sites

The latest GFS run does look seasonal I guess, no real arctic outbreaks but very normal temps with highs in the 50's and lows generally in the 30's for most of the extended...certainly not a "torch" IMO.....

I agree. "If" we're looking at December being the warm month (compared to Jan & Feb being the cold), this is about the best we can hope for.

 

When (if) we flip to a colder pattern current snow coverage could help with the cold air delivery. Most of Canada and a good potion of NW US is currently covered. If we can keep and even build on this it would help sustain future cold air outbreaks. **Years back I also read that a large western snow pack can help promote western high pressure; which helps to then funnel cold air down from western Canada.    

http://www.natice.noaa.gov/pub/ims/ims_gif/DATA/cursnow_usa.gif

Link to comment
Share on other sites

As we discussed above the GFS (6z & 12z) would indicate that the medium and long range would not be a torch. It would be much closer to normal if not a little below normal. No real cold air or wintery threats but again not warm. If you can remember back to how the weather was last January; this could be a repeat. Basically dismal.... 

Link to comment
Share on other sites

As we discussed above the GFS (6z & 12z) would indicate that the medium and long range would not be a torch. It would be much closer to normal if not a little below normal. No real cold air or wintery threats but again not warm. If you can remember back to how the weather was last January; this could be a repeat. Basically dismal.... 

 

Agree. If it is not going to be stormy, then let it be warm. I hate near average temps and lots of clouds this time of year.

Link to comment
Share on other sites

RAH not buying into all the GFS is showing (996mb, 925 wind @ 67k, 2.9"+/- rain)  just yet...

 

THE 12Z GFS AND
EC ARE MORE CONSISTENT WITH THE HANDLING OF THIS FEATURE AND NOW
BOTH ADVERTISE A CLOSE LOW LIFTING ACROSS THE SOUTHERN APPALACHIANS
WITH A SURFACE WAVE DEVELOPING NEAR THE COAST. NOT READY TO GET TOO
AGGRESSIVE IN HIGHLIGHTING PRECIPITATION CHANCES ESPECIALLY GIVEN
THE PATTERN AND WITH ONLY A SMALL NUMBER OF THE EC ENSEMBLE MEMBERS
SUGGESTING PRECIPITATION.

Link to comment
Share on other sites

^ That'll be up in WI when next week gets here.

I like that Goofy is bring them down here, even if for only a run, and now this one is much earlier in the run than the last try in this time frame.  Just keep that up until it's a tad colder all around.  A cut off ull, even if cold, would be entering shorts weather down here, lol.  I had to turn the fan on last night.  T

Link to comment
Share on other sites

Archived

This topic is now archived and is closed to further replies.

  • Recently Browsing   0 members

    • No registered users viewing this page.

×
×
  • Create New...