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NNE Winter Part 3


mreaves

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About the same at my place - there was still some cloud-fuzz around the moon at 10 last night.  I don't know how long that persisted, but it couldn't have helped radiation.  Might make a run at -20 tonight.

 

QPF on gfs jumped from about 1/3" yesterday to over 1" this morning.  We'll see if that persists or was just an oddball run.

lol, 8F for the low at my house. -6F down at the bottom of the hill.

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BTV just pulled a Winter Storm Watch. I am surprised to see that.

Yep, here are the first maps and some discussion that may brighten PF's day

 

GIVEN THE DIFFERENCES BTWN AMERICAN AND REST OF THE MODELS WL USE

A BLEND BTWN HPC/ECMWF/GFS FOR QPF. THIS SUPPORTS TRACE TO 0.10

SLV/WESTERN DACKS TO 0.50 TO 0.75" ACRS THE CPV AND MOST OF VT.

EXPECTING A VERY SHARP EAST TO WEST GRADIENT ACRS OUR FA...MAKING

FOR AN EXTREMELY CHALLENGING SNOWFALL FCST. USING A 12 TO 1 SNOW

RATIO FOR THE VALLEYS AND 15 TO 1 FOR THE MTNS SUGGESTS 6 OR MORE

INCHES IS POSSIBLE FROM CPV AND POINTS EAST. THINKING AROUND 6

INCHES CPV...TO 6 TO 10 INCHES CENTRAL/EASTERN VT...WITH LOCALIZED

HIGHER AMOUNTS FROM KILLINGTON TO SUGARBUSH TO STOWE. THIS WL BE

SUBJECT TO CHANGE AS TRACK OF SFC LOW PRES AND ULVL DYNAMICS

CHANGE WITH EACH MODEL RUN. EXPECTING GFS/NAM TO TREND TWD THE

ECMWF/UKMET AND GEM SOLUTIONS BY THE 00Z RUNS TONIGHT. FCST TEMPS

WL BE NEAR NORMAL THURSDAY WITH LITTLE CHANGE ANTICIPATED

OVERNIGHT WITH CLOUDS/PRECIP.

 

 

StormTotalSnowFcst.png

 

 

StormTotalSnowFcstZoomUR.png

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Earlier today I made a bet that we would get 4" or more at Plymouth State. All I need to win is to get >4.0" measured on campus. Really, every model has more than that. Only slight bit of worry would be the fact that it's Plymouth and we will get slightly screwed compared to surrounding areas. But I would be shocked if we got less then 4", or even 8" for that matter.

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Earlier today I made a bet that we would get 4" or more at Plymouth State. All I need to win is to get >4.0" measured on campus. Really, every model has more than that. Only slight bit of worry would be the fact that it's Plymouth and we will get slightly screwed compared to surrounding areas. But I would be shocked if we got less then 4", or even 8" for that matter.

I'll be really happy with anything over 3 or 4" if it breaks that way over here. You guys in NH/ME look golden.

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Quiet here. Is this what nervous anticipation sounds like on a message board?

All is well. Steady as she goes.

I was just thinking. 06-07 was a miserable inferno of a start to winter. Worse than this season. Then came vday and it turned. Vday '14, the sequel, part deux. Obviously not anticipating anything like the original, but curious coincidence.

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The updated advisories and snowfall maps from the BTV NWS are below – it’s an interesting advisory map thus far with the stripe of Winter Storm Warnings down the middle and Winter Storm Watches still off to the sides; the areas to the west are where the snowfall gradient appears to be tight as outlined in the BTV discussion below.  The general accumulations for the Winter Storm Watch areas are anticipated to be in the 8-12” range”

 

…SIMILAR TO LAST NIGHT...USED A BLEND OF ECMWF/GFS/SREF/HPC QPF ALONG WITH CLIMO SLR RATIOS TO ARRIVE AT MY CURRENT STORM TOTAL SNOWFALL ESTIMATE. UKMET TOO ROBUST AND WITH ITS LOWER RESOLUTION HAVE LEFT IT OUT OF THE MIX. BASED OFF THIS BLEND...MY CONFIDENCE HAS RISEN HIGH ENOUGH TO CONVERT EXISTENT WATCHES TO WARNINGS FOR MUCH OF OUR VERMONT COUNTIES...LEAVING CURRENT WATCHES AS IS FOR NOW ACROSS FAR NW VT INTO NY WHERE PCPN GRADIENT REMAINS TIGHT. THIS SEEMS THE MOST PRUDENT COURSE FOR NOW AND ALLOWS NEEDED WIGGLE ROOM TO ASSESS FUTURE MODEL RUNS LATER TODAY. SO FOR NOW...MY BEST ESTIMATE IS FOR SNOWFALL TOTALS RANGING IN THE 8 TO 12 INCH RANGE IN THE WARNING AREA...AND LOWER AMOUNTS FURTHER NORTH AND WEST WHERE CONFIDENCE REMAINS LOWER.

 

12FEB14A.jpg

 

12FEB14B.jpg

 

It was encouraging listening to Roger Hill’s broadcast this morning – for North-Central Vermont he was going with a general 6-12” snowfall forecast with the first storm on Thursday-Friday, then another light accumulation for the Saturday follow up; he didn’t give numbers, but I’d guess that means 1-3”, depending on what the mountains do, and then 3-6” or 4-8” for the Tuesday storm.  For Tuesday he mentioned that we’d have to watch out for mixed precipitation, with the line getting as far north as the Barre-Montpelier area for his estimation at this point.  It could be a good several days of snow though with a couple of synoptic storms; that’s something we haven’t seen much this season.

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reached -12F this morning.  Nice cold.

 

Did anyone see the AFD out of Atlanta?  It's well worth the entire read, but here are two paragraphs (with my bold), with language you just don't see too often:

 

 

AS SIGNIFICANT AS THE SNOWFALL IS...AND MAKE NO MISTAKE THESE ARE
SOME IMPRESSIVE TOTALS...IT IS THE ICE THAT WILL HAVE THE
CATASTROPHIC IMPACTS.
A LITTLE DIFFICULT TO DETERMINE THE NORTHERN
EDGE OF THE ICE. FOR EXAMPLE AT AHN...THE GFS WARM NOSE IS A LITTLE
COOLER THAN THE NAM AND WOULD RESULT IN MORE SLEET THAN FREEZING
RAIN. HOWEVER...BECAUSE OF THE DEPTH OF THE WARM NOSE...AM STILL
LEANING TOWARD KEEPING QUITE A BIT OF FZRA IN THAT AREA. SO WITH
THAT...ICE TOTALS REMAIN VERY SIMILAR TO WHAT WAS PREVIOUSLY OUT BUT
THINK THE 1/4 INCH LINE MAY BE A LITTLE FURTHER SOUTH AND MAX TOTALS
ALONG THE EAST I-20 CORRIDOR ARE BUMPED UP A LITTLE TO OVER AN INCH.
ISOLATED HIGHER AMOUNTS CANNOT BE RULED OUT. IN CASE IT HASNT BEEN
MADE CLEAR ALREADY...THESE ARE CATASTROPHIC AND CRIPPLING TOTALS
WHICH COULD RESULT IN WIDESPREAD POWER OUTAGES THAT MAY LAST FOR
DAYS. IF RESIDENTS HAVE NOT COMPLETED THEIR PREPARATIONS IT MAY BE
TOO LATE.

 

and

 

 

PRETTY SURE THAT THERE ARE SOME THINGS I HAVENT COVERED HERE BUT
HOPEFULLY THIS LIGHT READING MATERIAL IS GOOD ENOUGH TO GET
EVERYONES DAY STARTED. THE BOTTOM LINE...AS THE ENTIRE WEATHER
ENTERPRISE HAS BEEN ADVERTISING FOR DAYS NOW...
THIS-IS-AN-EVENT-OF-HISTORICAL-PROPORTIONS!!
CATASTROPHIC...CRIPPLING...PARALYZING...CHOOSE YOUR ADJECTIVE.
THIS
IS A VERY VERY BIG DEAL ESPECIALLY FROM METRO ATLANTA EAST ALONG THE
I-20 CORRIDOR...GENERALLY ANYWHERE SOUTH OF I-85 AND NORTH OF I-16
WHERE THE MOST SIGNIFICANT ICE TOTALS ARE FORECAST. STAY SAFE OUT
THERE!

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