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March 5-6 Storm Discussion


Poimen

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The GFS just gave Boston a foot of snow. The Euro and most other modeling give Boston nothing. That's a huge difference.

The GFS also just gave areas in VA that the Euro progged for 12" of snow nothing but rain.

Actually it gave Boston 2+ feet of snow. That run would be the storm of the century. Beast run.
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Can see the storm diving west here: http://www.meteo.psu.edu/~fxg1/SAT_US/animwv.html

Not sure what this means but it looks to be happening quick

I'm looking at the westerly flow north of Maine. If tonight's euro get a good sample of these movements before initialization, it might swing that ULL down into northern 'Bama before all is said and done. Would they postpone the Euro run to adjust input parameters?

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File in for the Euro, ladies and gentlemen.  Time to see if it stays consistent with its accumulating snow across the northern Piedmont.  The Doctor has initialized.

 

Just something to note on initialization, the ULL is a little bit south of the position that was progged at this time from last night's 00z run.

 

---

 

The Euro is south (compared to 00z last night), but stronger with our ULL through 24.  Its center was in south-central North Dakota and now it is in north-central South Dakota.

 

Little north, but weaker at 48.  Heights are lower across the Carolinas, though, so we'll see where she goes.

 

Definitely a step in the wrong direction, as it turns out, though perhaps not a disaster.

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0Z Doctor definitely not as good a run for northern NC as was the 12Z Doc. Confirmed by less snow on the clown map.

 

 <1" Triad and Triangle on 0Z. However, Asheville now gets 1" vs. <1" on 12Z.

 

Thanks, Larry.  Definitely a step in the wrong direction, but perhaps we'll still see a little something accumulate.

 

It sounds like most of the modeling, sans the GFS, is converging on a pretty similar solution now.

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1inch of snow in Asheville is thready worthy. They are in a snow drought with DC. Both of these places need this storm. 

 

Granted, I don't think Asheville gets 1 inch but guess there is a non-zero chance.

Do you know Asheville's climate? They always get shafted LOL

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Here we go GSP kind of pulling the trigger for the mountains and I like it!

 

AVERY-MADISON-YANCEY-MITCHELL-SWAIN-HAYWOOD-GRAHAM-
NORTHERN JACKSON-
INCLUDING THE CITIES OF...NEWLAND...SPRUCE PINE...BRYSON CITY...
WAYNESVILLE...SYLVA
458 AM EST MON MAR 4 2013

...WINTER STORM WATCH IN EFFECT FROM TUESDAY EVENING THROUGH
WEDNESDAY EVENING...

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED
A WINTER STORM WATCH...WHICH IS IN EFFECT FROM TUESDAY EVENING
THROUGH WEDNESDAY EVENING.

* LOCATIONS...THE TENNESSEE BORDER COUNTIES OF NORTH
  CAROLINA...FROM AVERY COUNTY SOUTH TO GRAHAM COUNTY. INCLUDING
  NORTHERN JACKSON COUNTY.

* HAZARDS...HEAVY SNOW ACCUMULATIONS. BLOWING AND DRIFTING
  SNOW...WITH REDUCED VISIBILITIES.

* TIMING...SNOW SHOWERS WILL DEVELOP TUESDAY EVENING. WIDESPREAD
  MODERATE SNOW SHOWERS EXPECTED LATE TUESDAY NIGHT THROUGH
  WEDNESDAY MORNING. SNOWFALL RATES SHOULD BEGIN TO DECREASE
  WEDNESDAY AFTERNOON.

* ACCUMULATIONS...TOTAL SNOWFALL ACCUMULATIONS OF 3 TO 5 INCHES
  WITHIN THE VALLEYS...RIDGES MAY RECEIVE 7 TO 9 INCHES.

* IMPACTS...HEAVY SNOWFALL WILL RESULT IN SNOW COVERED
  ROADS...BRIDGES...AND OVERPASSES. STRENGTHENING NORTHWEST WINDS
  AFTER SUNRISE ON WEDNESDAY WILL CREATE BLOWING AND DRIFTING
  SNOW. HIGH ELEVATIONS ALONG THE TENNESSEE LINE MAY SEE DEEP SNOW
  DRIFTS ACROSS ROADS. VISIBILITIES MAY BE REDUCED TO BETWEEN ONE
  QUARTER AND ONE HALF MILE IN SNOW SHOWERS AT TIMES.

* TEMPERATURES...IN THE MID TO UPPER 20S. HIGH ELEVATIONS MAY
  REMAIN IN THE TEENS.

* WINDS...NORTHWEST 15 TO 25 MPH WITH GUSTS UP TO 40 MPH.

 

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ASHE-ALLEGHANY NC-WATAUGA-GRAYSON-
INCLUDING THE CITIES OF...WEST JEFFERSON...SPARTA...BOONE...
INDEPENDENCE...WHITETOP...TROUTDALE...VOLNEY
524 AM EST MON MAR 4 2013

...WINTER STORM WATCH IN EFFECT FROM TUESDAY EVENING THROUGH
WEDNESDAY EVENING...

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A WINTER
STORM WATCH...WHICH IS IN EFFECT FROM TUESDAY EVENING THROUGH
WEDNESDAY EVENING.

* HAZARD TYPES...HEAVY WET SNOW.

* ACCUMULATIONS...SNOW ACCUMULATION OF 2 TO 6 INCHES.

* TIMING...RAIN WILL CHANGE TO SNOW AROUND DINNERTIME TUESDAY WITH
  HEAVIEST SNOW FALLING FROM 7PM TO 12AM.

* IMPACTS...GUSTY WINDS WEDNESDAY COULD TOPPLE TREES AND POWER
  LINES BECAUSE OF THE HEAVY WET SNOW. LOW VISIBILITIES.

* WINDS...NORTHWEST 15 TO 25 MPH WITH GUSTS UP TO 50 MPH.

* TEMPERATURES...IN THE LOWER 30S.

 

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I don't get it, how are they predicting 7-9" for mtn tops or even 3-5" in the valleys?? Doesn't even look like 1-2" on most of the models. And 2-6" of HEAVY WET SNOW for watauga? Looks like 1-3" of light snow if we are lucky. Very surprising totals being thrown out for usually conservative services.

Anyone want to shed some light on why they are throwing these high totals around for the mtns?

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GSP's first snow map:

 

StormTotalSnowFcst.png

 

Here is part of the overnight afd:

 

TUESDAY NIGHT...THE COMPLEX SFC LOW WILL PUSH EAST ALONG THE NC/VALINE...REACHING THE COAST BY 12Z. THE CLOSED H5 LOW IS EXPECTED TOTRACK ACROSS THE NC MTNS BETWEEN 6Z TO 12Z. THE GREATEST FORCINGASSOCIATED WITH THE CLOSED LOW WILL REMAIN NE OF THECENTER...HOWEVER...LIFT ACROSS THE REGION WILL PEAK NEAR 25 MB/HRAROUND 6Z. THE COLD FRONT SHOULD QUICKLY PUSH ACROSS THECWA...POSSIBLY EAST OF THE CWA BY 3Z WED. IN THE WAKE OF THEFRONT...A DRY SLOT WILL SWING SW TO NE ACROSS THE FOOTHILLS ANDPIEDMONT ALONG WITH STRONG H85 CAA. TEMPERATURES SHOULD RAPIDLY FALLINTO THE MID TO LOW 30S ACROSS THE MTNS DURING THE LATEEVENING...WITH MTN LOWS EXPECTED IN THE 20S. EAST OF THE MTNS...LOWSSHOULD RANGE FROM THE LOW TO MID 30S. THE CAA WILL RESULT IN A RAPIDTRANSITION TO SNOW ACROSS THE MTNS. THE ARRIVAL OF THE DRY SLOTSHOULD END MEASURABLE PRECIP EAST OF THE MTNS AFTER 9Z. FORECASTSOUNDINGS INDICATE THE PROFILES ACROSS THE MTNS WILL SEE LIMITEDMOISTURE AROUND MIDNIGHT...MAINLY BELOW H7...BUT ADEQUATE FOR SNOWGENERATION. DURING THE LATE NIGHT HOURS...H85 NW WINDS WILL INCREASETO 40 TO 50 KTS...INCREASING LLVL MOISTURE AND SNOWFALL ALONG THE TNLINE.NWFS IS EXPECTED TO CONTINUE ACROSS THE TN BORDER COUNTIES THROUGHTHE DAYLIGHT HOURS ON WEDNESDAY...ESPECIALLY DURING THE EARLYMORNING. THE COMBINATION OF THE SYNOPTIC SNOW TUESDAY EVENING ANDNWFS WEDNESDAY MORNING IS EXPECTED TO RESULT IN WARNING CRITERIASNOWFALL ACROSS THE TN BORDER COUNTIES. THEREFORE...WE WILLHIGHLIGHT THE SNOWFALL POTENTIAL WITH A WINTER STORM WATCH FROM 0ZWED TO 0Z THURS...INCLUDING BUNCOMBE CO. SNOWFALL ALONG THE TN LINEMAY RANGE FROM 3 TO 5 INCHES WITHIN THE VALLEYS TO AROUND 8 INCHESACROSS THE RIDGES.

 

Finally the WSW for Buncombe:

 

 

Winter Storm Watch

URGENT - WINTER WEATHER MESSAGE...RESENTNATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC458 AM EST MON MAR 4 2013...A MID WEEK STORM MAY BRING HEAVY SNOW TO THE TENNESSEE BORDERCOUNTIES OF NORTH CAROLINA....A COMPLEX LOW PRESSURE SYSTEM WILL DEEPEN AS IT CROSSES THESOUTHERN APPALACHIANS TUESDAY EVENING INTO EARLY WEDNESDAYMORNING. THE CENTER OF THE LOW IS EXPECTED TO PUSH EAST ALONG THESTATE LINE BETWEEN VIRGINIA AND NORTH CAROLINA EARLY WEDNESDAYMORNING. THE CIRCULATION AROUND THE LOW WILL RESULT IN COLD ANDMOIST FLOW ACROSS THE TENNESSEE BORDER COUNTIES OF NORTH CAROLINATHROUGHOUT WEDNESDAY...SUPPORTING WIDESPREAD SNOW SHOWERS. INADDITION...GUSTY NORTHWEST WINDS WILL RESULT IN BLOWINGSNOW...POSSIBLY GENERATING DEEP SNOW DRIFTS NEAR THE TENNESSEELINE.NCZ053-042000-/O.NEW.KGSP.WS.A.0004.130306T0000Z-130307T0000Z/BUNCOMBE-INCLUDING THE CITY OF...ASHEVILLE458 AM EST MON MAR 4 2013...WINTER STORM WATCH IN EFFECT FROM TUESDAY EVENING THROUGHWEDNESDAY EVENING...THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUEDA WINTER STORM WATCH...WHICH IS IN EFFECT FROM TUESDAY EVENINGTHROUGH WEDNESDAY EVENING.* LOCATIONS...BUNCOMBE COUNTY...ESPECIALLY AREAS BETWEEN BLACK  MOUNTAIN TO BARNARDSVILLE.* HAZARDS...SNOW ACCUMULATIONS. BLOWING AND DRIFTING  SNOW...WITH REDUCED VISIBILITIES.* TIMING...SNOW SHOWERS WILL DEVELOP TUESDAY EVENING. WIDESPREAD  MODERATE SNOW SHOWERS EXPECTED LATE TUESDAY NIGHT THROUGH  WEDNESDAY MORNING. SNOWFALL RATES SHOULD BEGIN TO DECREASE  WEDNESDAY AFTERNOON.* ACCUMULATIONS...SNOW ACCUMULATION NEAR 2 INCHES EXPECTED ACROSS  DOWNTOWN ASHEVILLE TO SKYLAND. GENERALLY 2 TO 4 INCHES OF SNOW  EXPECTED ACROSS LEICESTER AND WEAVERVILLE. HIGHER ELEVATIONS  FROM BLACK MOUNTAIN TO BARNARDSVILLE COULD SEE 5 INCHES OR MORE.* IMPACTS...MODERATE TO HEAVY SNOWFALL WILL RESULT IN SNOW COVERED  ROADS...BRIDGES...AND OVERPASSES. STRENGTHENING NORTHWEST WINDS  AFTER SUNRISE ON WEDNESDAY WILL CREATE BLOWING AND DRIFTING  SNOW.* TEMPERATURES...IN THE MID TO UPPER 20S.* WINDS...NORTHWEST 15 TO 25 MPH WITH GUSTS UP TO 40 MPH.PRECAUTIONARY/PREPAREDNESS ACTIONS...A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANTSNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL.CONTINUE TO MONITOR THE LATEST FORECASTS.STAY TUNED TO NOAA WEATHER RADIO OR YOUR FAVORITE SOURCE OFWEATHER INFORMATION FOR THE LATEST UPDATES. ADDITIONAL DETAILSCAN BE FOUND AT WWW.WEATHER.GOV/GSP.

 

 

Do I think this will verify?......probably not. With a forecast like this little model jogs can become critical. They could be the difference in no snow or our best snow in 2 winters. I never thought that there would be some dramatic shift south. Maybe this will explain why some of us are rooting for any jog to the S what so ever.

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So more snow in macon county than buncombe. Yet they issue a winter storm watch for buncombe and not one for macon.

Just to add. Other than upslope snow for the usual spots I don't see anything out of this. What is it with gsp this year? They sure are trigger happy.

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It always goes north. We really need a low modeled to go through Florida 120 out if we want to have a shot here. Another crappy winter.

If it turns out that it does indeed track through northern NC or southern VA, then I'd say the GFS well outperformed the Euro on this one....even though it might be out to lunch with it going up to the NE now (of course, that could be right).

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It always goes north. We really need a low modeled to go through Florida 120 out if we want to have a shot here. Another crappy winter.

If it turns out that it does indeed track through northern NC or southern VA, then I'd say the GFS well outperformed the Euro on this one....even though it might be out to lunch with it going up to the NE now (of course, that could be right).

 

Well your guys only hope is the EPS control run it had descent wrap around for you guys. Probably .40 or so of snow. 

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Well your guys only hope is the EPS control run it had descent wrap around for you guys. Probably .40 or so of snow.

That would be nice, though, I'm in the southern part of the county, so it probably tapers off to .1 IMBY, lol. It's been ticking north too, toward the unwaveringly north GFS. We'll see...but I've pretty much written this one off.

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