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January Pattern and Storm Discussion II


Cold Rain

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Just looking at the evolution of the 500 maps I don't really see what would cause it to not gain latitude coming east.  I see the 50/50, but it looks displaced a little northeast and the NAO looks neutral at best. Nice eye candy though.

 

What we have going FOR it is the phase of the MJO (should be in 8, heading to 1)...................

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Just looking at the evolution of the 500 maps I don't really see what would cause it to not gain latitude coming east.  I see the 50/50, but it looks displaced a little northeast and the NAO looks neutral at best. Nice eye candy though.

 

What we have going FOR it is the phase of the MJO (should be in 8, heading to 1)...................

 

It takes the perfect track for places like RDU....looks like it bombs off the coast a bit after the cold front has moved through unless I'm looking at it wrong. 

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Just looking at the evolution of the 500 maps I don't really see what would cause it to not gain latitude coming east.  I see the 50/50, but it looks displaced a little northeast and the NAO looks neutral at best. Nice eye candy though.

 

What we have going FOR it is the phase of the MJO (should be in 8, heading to 1)...................

MOst likely it is just the ole Euro bias in the day 5-10 range of hanging too much energy back in the Southwest as a trough drops down mid to late next week. It hangs it out for a few days and then brings it east while the strong trough in SE Canada keeps it supressed. GFS of course doesnt leave this energy behind like the EUro does. Is it possible? Sure, but unless the other globals are showing it, wise not to trust it for a few more days at least.

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From Tallahassee NWS today:

 

High temps are expected to climb back into the middle 70s over theinterior, before a cold front brings the next chance of showers andstorms to the region, along with another cool down expected by theend of the week. Nevertheless, with the average temperature at TLHnow standing at 59.3 degrees (or 8.3 degrees above normal, whichwould be also the 6th warmest Jan. of all time if it ended today),there appears to be a strong likelihood of a Top 10 all time finish(with #10 now at 56.9 degrees from Jan. 2006).
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12z Euro 4-8 for me next Saturday!

 

Right on queue!!

 

I know it's at 240, but I LOVE it when a storm shows up on the models when the Board's mets are talking up a synoptic time frame.  May or may not pan out but at least it's something to track that will probably do something big for someone.  Hopefully a widespread event but we'll see.  I don't know why but I'm itching for a nice February storm.  :weenie:

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Well the GFS OP has been hinting at some potential around this time frame the past couple of days on and off. I've started observing the individual ens members as well as it's mean. You get on average 3-4 members showing posotive signs from run to run. The 12z has 3 or 4, heres the best one for MBY posted below. Now that it's within 10 days  it will be interesting to see if the euro op and euro ensembles start honking. Keep in mind it was the euro ensembles last SAT @ 0z that spat out 1-3 inches of snow for central NC. If we see a run or two over the weekend on the euro ensemble sniffing this out, it will be a good sign imo.

 

12zensp009snow240.gif

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Close call(again), 18z. GFS. At 162. Looks like cold chasing moisture. Alot of moisture.

The term "cold chasing moisture" is not one I'm a fan of and its used a lot. We should just call it a fropa imo. Fropa's don't produce around here and they don't trend towards winter storms either. We need LP's in the south to produce a good storm. "Cold chasing moisture" situations mean the LP is way north of where we want it and I don't think I've ever seen one trend to a winter storm around here. Jmo

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The term "cold chasing moisture" is not one I'm a fan of and its used a lot. We should just call it a fropa imo. Fropa's don't produce around here and they don't trend towards winter storms either. We need LP's in the south to produce a good storm. "Cold chasing moisture" situations mean the LP is way north of where we want it and I don't think I've ever seen one trend to a winter storm around here. Jmo

Sorry to offend you. I know we need low pressure in the South for snow. I said cold chasing moisture due to the cold advancing as precipitation pulls Northeast. I do understand its a frontal passage.

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The term "cold chasing moisture" is not one I'm a fan of and its used a lot. We should just call it a fropa imo. Fropa's don't produce around here and they don't trend towards winter storms either. We need LP's in the south to produce a good storm. "Cold chasing moisture" situations mean the LP is way north of where we want it and I don't think I've ever seen one trend to a winter storm around here. Jmo

 

To be fair,

 

I have seen 2 instances in my life where cold chasing moisture from a frontal passage gave me accumulating snow.  Both times I switched to snow about an hour before the precip ended and recieved roughly an inch of snow. I’m located in virtually the worst spot for frontal snow, since I’m tucked right behind the mountains in the hardest place for NW flow cold advection to scour out low level warm air.

 

The last time it happened was a good 15 years ago though.... 

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To be fair,

I have seen 2 instances in my life where cold chasing moisture from a frontal passage gave me accumulating snow. Both times I switched to snow about an hour before the precip ended and recieved roughly an inch of snow. I’m located in virtually the worst spot for frontal snow, since I’m tucked right behind the mountains in the hardest place for NW flow cold advection to scour out low level warm air.

The last time it happened was a good 15 years ago though.... [/quote

Are you thinking of a cold front close to Christmas in 99 or 2000?

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Since I didn't see anyone post the Euro weeklies it pretty much keeps the SE seasonal with a few short warm ups which is about normal. It did have a big dog snow storm on the EPS run for late Feb....but you know that's like thinking the hot chick at the bar will talk to you sober. 

Funny how when feb rolls around I give up on weeklies and all the tc stuff. We've got 4-6 weeks left to score. Once that groundhog makes the opening news story it's all about chasing the big daddy for me. With the sun angles and climo it becomes harder to sustain a snowpack for more tha a couple of days so instead of getting the locked in favorable pattern that last a few weeks I'm just hoping to catch one good smack down to help mentally get through the upcoming dog days. First shot will be late next week. Hopefully we will be hearing the models, euro and its ensembles barking Sunday into Monday. Then it will be game on again. I haven't been sleigh riding with the kids in 2. Years now as we'll as see the ponds frozen up. Those have always been annual occurrences. The pond has a shot to get some ice around the edges by Saturday morning or Sunday a.m. This will most likely be the last shot to see that happen until next winter because feb looks to be up and down very 3 or so days in the temp regime scheme of things.

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PROGNOSTIC DISCUSSION FOR 6 TO 10 AND 8 TO 14 DAY OUTLOOKS

NWS CLIMATE PREDICTION CENTER COLLEGE PARK, MD

300 PM EST THU JANUARY 24 2013

6-10 DAY OUTLOOK FOR JAN 30 - FEB 03, 2013

TODAY'S ENSEMBLE MEAN AND HIGH-RESOLUTION RUNS ARE IN FAIRLY GOOD AGREEMENT FOR

THE UPCOMING 6-10 DAY PERIOD OVER THE PACIFIC-NORTH AMERICA REGION. THE MODELS

GENERALLY AGREE ON AN AMPLIFIED 500-HPA FLOW PATTERN, WITH A MODERATE RIDGE

NEAR THE WEST COAST, A DEEP TROUGH ACROSS MOST OF THE CONUS, AND THE POLAR

VORTEX CENTERED JUST NORTH OF HUDSON BAY. THE 00Z HIGH RESOLUTION ECMWF RUN AND

THE 00Z CANADIAN ENSEMBLE MEAN BOTH PREDICT A LOBE OF THE POLAR VORTEX WILL

EXTEND WESTWARD ACROSS NORTHERN CANADA AND NORTHERN ALASKA. ALL AVAILABLE MODEL

SOLUTIONS FAVOR ELEVATED CHANCES OF BELOW-NORMAL TEMPERATURES ACROSS MUCH OF

THE CENTRAL AND EASTERN CONUS DURING THE 6-10 DAY FORECAST PERIOD.

THERE ARE ENHANCED ODDS OF BELOW-NORMAL TEMPERATURES FROM MOST OF THE GREAT

PLAINS AND MISSISSIPPI VALLEY EASTWARD TO THE ATLANTIC COAST AS FAR SOUTH AS

THE CAROLINAS. THESE AREAS ROUGHLY CORRESPOND TO THE PREDICTED REGIONS OF

BELOW-NORMAL 500-HPA HEIGHTS AND ANOMALOUS NORTHERLY FLOW IN THE OFFICIAL

BLENDED HEIGHT PROG.

THERE ARE ENHANCED ODDS OF ABOVE-MEDIAN PRECIPITATION FROM THE MISSISSIPPI

RIVER EASTWARD TO THE ATLANTIC COAST, THE NORTHERN GREAT PLAINS, SOUTHWESTERN

ALASKA, AND THE ALASKA PANHANDLE. THESE AREAS OF RELATIVE WETNESS ARE GENERALLY

ATTRIBUTED TO SOUTHERLY ANOMALOUS FLOW AND/OR PROXIMITY TO STORM TRACKS.

8-14 DAY OUTLOOK FOR FEB 01 - 07 2013

TODAY'S ENSEMBLE MEAN SOLUTIONS ARE IN FAIRLY GOOD AGREEMENT ON THE PREDICTED

MID-TROPOSPHERIC FLOW PATTERN ACROSS THE PACIFIC-NORTH AMERICA DOMAIN DURING

WEEK 2. IN GENERAL, THE ENSEMBLE MEANS ANTICIPATE A RIDGE NEAR OR ALONG THE

WEST COAST WHICH EXTENDS NORTHWESTWARD ACROSS ALASKA, AND A DEEP TROUGH OVER

EASTERN NORTH AMERICA. THIS MEAN CIRCULATION PATTERN, SIMILAR TO THE

CIRCULATION PATTERN EXPECTED FOR THE 6-10 DAY PERIOD, FAVORS ENHANCED CHANCES

OF BELOW-NORMAL TEMPERATURES ACROSS THE CENTRAL AND EASTERN CONUS.

THERE ARE INCREASED CHANCES OF BELOW-NORMAL TEMPERATURES FROM THE NORTHERN

GREAT PLAINS AND EASTERN PORTIONS OF THE CENTRAL AND SOUTHERN GREAT PLAINS

EASTWARD TO THE ATLANTIC COAST. THIS LARGE AREA OF COVERAGE IS CONSISTENT WITH

PREDICTED BELOW-NORMAL HEIGHTS AND NORTHWESTERLY ANOMALOUS FLOW.

THE ODDS FOR ABOVE-MEDIAN PRECIPITATION AMOUNTS ARE ELEVATED OVER THE NORTHERN

GREAT PLAINS, THE UPPER MISSISSIPPI VALLEY, THE GREAT LAKES REGION, MOST OF THE

OHIO VALLEY, THE APPALACHIANS, THE EAST COAST STATES, AND SOUTHWESTERN ALASKA.

THESE AREAS ARE GENERALLY ALONG THE PREDICTED LOCATION OF THE AVERAGE STORM

TRACK AND ASSOCIATED FRONTAL SYSTEMS.

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