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Feb 25-26 Discussion/pbp


Wow

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Do you know which members should be more trusted in this situation?  I did notice that the three families of members were all pretty different.

 

---

 

00z ECMWF clown totals:

 

PGV: 11"

ATL: 6"

CLT: 6"

GSO: 4"

RDU: 7"

GSP: 5"

 

One thing I would note is that 850s are really cold for the northern fringes of the precip shield, so I guess it's possible there's decent ratios up there.  >2" makes it all the way up to Roanoke as the precip field continues to spread out on each successive Euro run.

 

Sorry for the IMBY post, but do you have an AVL total?

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The mean snowfall is a bit deceptive because they still seems to be a spread among the members.  Almost all of the arw members show something like this:

 

iYA7yDQ.gif

 

Granted, this is overdone, but it does realize the potential here.  The NMM panels from the sref are total different with minimal snowfall for the most part.

 

 

 

Good grief.  Understand that this is overamped.....but that is mighty pretty to see at 24 hrs out...

 

 

Needed to see that after my boys put that crapfest on the floor this evening in the Dome...

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The mean snowfall is a bit deceptive because they still seems to be a spread among the members. Almost all of the arw members show something like this:

iYA7yDQ.gif

Granted, this is overdone, but it does realize the potential here. The NMM panels from the sref are total different with minimal snowfall for the most part.

Looks like/similar to the image I just posted. Shows consistency.

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Looking over past event maps on NWS Raleigh, it doesn't look like RDU has *officially* seen a 8"+ snowstorm since Jan 25th 2000. Although there have been a few 6" events, heaviest events always seem to miss RDU by a madder of 25 miles on way or the other. 

Can anyone confirm that is the last time? 

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Looking over past event maps on NWS Raleigh, it doesn't look like RDU has *officially* seen a 8"+ snowstorm since Jan 25th 2000. Although there have been a few 6" events, heaviest events always seem to miss RDU by a madder of 25 miles on way or the other. 

Can anyone confirm that is the last time? 

 

January 2002 was the last time.  It's the last time I saw a >8" snowstorm, too. (last Fab Feb was right at 8")

 

accum.20020102.gif

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The model consensus is to pretty much have the heaviest totals through north georgia and skip over upstate and start again with heavier totals once it hits charlotte and go through raleigh.  Sadly for the upstate, that seems like it would most likely be correct given our history.  What causes this to happen?

5h low weakening and the coastal taking over. The precip that has been traversing the country starts to die out as the main source of snow is now the coastal low and usually someone in the middle has a relative minimum of precipitation.

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5h low weakening and the coastal taking over. The precip that has been traversing the country starts to die out as the main source of snow is now the coastal low and usually someone in the middle has a relative minimum of precipitation.

 

Yeah that makes sense unfortunately.  Depressing here in the upstate having higher totals to our west and east.  Oh well, still hoping we can pull out 4" or 5".

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 The TX precip. is currently more extensive than the 0Z Euro had and it is WAY more extensive than the very little shown by the 0Z GFS. Will this translate into even higher precip. than those models are showing, which are about their wettest yet?

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RNK 11:30 Update...

 

Winter Storm Warning

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE BLACKSBURG VA
1128 PM EST TUE FEB 24 2015

...WINTER STORM TO BRING ACCUMULATING SNOWS ACROSS THE REGION
WEDNESDAY NIGHT...

.A STORM DEVELOPING OVER THE GULF COAST WEDNESDAY WILL SHIFT TO
OFF THE NORTH CAROLINA COAST THURSDAY MORNING. AS MOISTURE MOVES
INTO THE COLD AIR IN PLACE...SNOW WILL THE MAIN WEATHER TYPE. SOME
RAIN WILL BE MIXED IN EARLY WEDNESDAY EVENING IN THE NORTH
CAROLINA FOOTHILLS...EAST TOWARD SOUTHSIDE VIRGINIA...BUT CHANGE
TO ALL SNOW BY LATE WEDNESDAY EVENING. THIS WINTER STORM WILL EXIT
BY LATE THURSDAY MORNING.

ASHE-ALLEGHANY NC-SURRY-STOKES-WATAUGA-WILKES-YADKIN-GRAYSON-
CARROLL-PATRICK-
INCLUDING THE CITIES OF...WEST JEFFERSON...SPARTA...DOBSON...
DANBURY...BOONE...WILKESBORO...YADKINVILLE...INDEPENDENCE...
WHITETOP...TROUTDALE...VOLNEY...GALAX...STUART
1128 PM EST TUE FEB 24 2015

...WINTER STORM WARNING IN EFFECT FROM 7 PM WEDNESDAY TO 9 AM EST
THURSDAY...

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A WINTER
STORM WARNING FOR HEAVY SNOW...WHICH IS IN EFFECT FROM 7 PM
WEDNESDAY TO 9 AM EST THURSDAY. THE WINTER STORM WATCH IS NO
LONGER IN EFFECT.

* LOCATIONS...NORTH CAROLINA MOUNTAINS AND FOOTHILLS...NORTH TO
  ALONG AND EITHER SIDE OF THE BLUE RIDGE FROM MOUNT ROGERS TO
  STUART VIRGINIA.

* HAZARD TYPES...SNOW...HEAVY AT TIMES

* ACCUMULATIONS...SNOW ACCUMULATION OF 4 TO 7 INCHES.

* TIMING...SNOW WILL BEGIN EARLY WEDNESDAY EVENING AND CONTINUE
  MUCH OF THE NIGHT...TAPERING OFF AFTER DAWN THURSDAY.

* IMPACTS...SNOW COVERED ROADS CAN BE EXPECTED...AND THIS SNOW
  WILL BE WET...AND HARDER TO TRAVEL ON.

* WINDS...EAST 5 TO 10 MPH.

* TEMPERATURES...FALLING IN THE 20S WEDNESDAY NIGHT.

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 The TX precip. is currently more extensive than the 0Z Euro had and it is WAY more extensive than the very little shown by the 0Z GFS. Will this translate into even higher precip. than those models are showing, which are about their wettest yet?

 

Short-range models are also coming in little heavier for Southern Arkansas/Northern Mississippi, but it's a thin storm comparing to Euro.

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The Euro may actually reflect the temperatures trends. If that's the case, Atlanta will get a good snow.

 

The Euro has been come and go this winter, it was horrible early, it got very hot after the failed blizzard debacle in NYC for about 2-3 weeks, but the last 2 weeks it has been running somewhat cold again and very dry on its QPF...and by cold I mean poor, not running cold thermally lol.

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RNK 11:30 Update...

 

Winter Storm Warning

URGENT - WINTER WEATHER MESSAGE

NATIONAL WEATHER SERVICE BLACKSBURG VA

1128 PM EST TUE FEB 24 2015

...WINTER STORM TO BRING ACCUMULATING SNOWS ACROSS THE REGION

WEDNESDAY NIGHT...

.A STORM DEVELOPING OVER THE GULF COAST WEDNESDAY WILL SHIFT TO

OFF THE NORTH CAROLINA COAST THURSDAY MORNING. AS MOISTURE MOVES

INTO THE COLD AIR IN PLACE...SNOW WILL THE MAIN WEATHER TYPE. SOME

RAIN WILL BE MIXED IN EARLY WEDNESDAY EVENING IN THE NORTH

CAROLINA FOOTHILLS...EAST TOWARD SOUTHSIDE VIRGINIA...BUT CHANGE

TO ALL SNOW BY LATE WEDNESDAY EVENING. THIS WINTER STORM WILL EXIT

BY LATE THURSDAY MORNING.

ASHE-ALLEGHANY NC-SURRY-STOKES-WATAUGA-WILKES-YADKIN-GRAYSON-

CARROLL-PATRICK-

INCLUDING THE CITIES OF...WEST JEFFERSON...SPARTA...DOBSON...

DANBURY...BOONE...WILKESBORO...YADKINVILLE...INDEPENDENCE...

WHITETOP...TROUTDALE...VOLNEY...GALAX...STUART

1128 PM EST TUE FEB 24 2015

...WINTER STORM WARNING IN EFFECT FROM 7 PM WEDNESDAY TO 9 AM EST

THURSDAY...

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A WINTER

STORM WARNING FOR HEAVY SNOW...WHICH IS IN EFFECT FROM 7 PM

WEDNESDAY TO 9 AM EST THURSDAY. THE WINTER STORM WATCH IS NO

LONGER IN EFFECT.

* LOCATIONS...NORTH CAROLINA MOUNTAINS AND FOOTHILLS...NORTH TO

  ALONG AND EITHER SIDE OF THE BLUE RIDGE FROM MOUNT ROGERS TO

  STUART VIRGINIA.

* HAZARD TYPES...SNOW...HEAVY AT TIMES

* ACCUMULATIONS...SNOW ACCUMULATION OF 4 TO 7 INCHES.

* TIMING...SNOW WILL BEGIN EARLY WEDNESDAY EVENING AND CONTINUE

  MUCH OF THE NIGHT...TAPERING OFF AFTER DAWN THURSDAY.

* IMPACTS...SNOW COVERED ROADS CAN BE EXPECTED...AND THIS SNOW

  WILL BE WET...AND HARDER TO TRAVEL ON.

* WINDS...EAST 5 TO 10 MPH.

* TEMPERATURES...FALLING IN THE 20S WEDNESDAY NIGHT.

 

 

Blacksburg took it up a few notches with the latest model outputs....went to 4-7, wonder when RAH will pull the trigger?

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The Euro clown snow maps are very low resolution and tend to spread or bleed the snow qpf contours outward on every side- so it gives the illusion of more snow down to south of I-20 but looking at the 2M temps and 850 temps they suggest not as much snow further south than what the accumulation maps show- and this also flies in the face of most of the other guidance. Also there is no evidence that the Doc is any better than the more hi-res models at this time frame

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The Euro clown snow maps are very low resolution and tend to spread or bleed the snow qpf contours outward on every side- so it gives the illusion of more snow down to south of I-20 but looking at the 2M temps and 850 temps they suggest not as much snow further south than what the accumulation maps show- and this also flies in the face of most of the other guidance. Also there is no evidence that the Doc is any better than the more hi-res models at this time frame

 

Well, that explains the thinner looking storm on HRRR/RAP for those west of us...

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The Euro has been come and go this winter, it was horrible early, it got very hot after the failed blizzard debacle in NYC for about 2-3 weeks, but the last 2 weeks it has been running somewhat cold again and very dry on its QPF...and by cold I mean poor, not running cold thermally lol.

 

Do you think QPF could be underdone in general by some of the drier models, then?  Aside from the really heavy bands, the NAM didn't seem that ridiculous QPF-wise to me, for example.  Then again, I'm not a met, so I might not be seeing everything correctly.

 

The Euro has doubled QPF here in the last two runs, so maybe it has caught on, or maybe it still has a ways to go.

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