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Thanksgiving Weekend Weather (Wed-Sun)


ORH_wxman

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Stick a fork in snow growth by 21z lol

Well duh Ryan, even the NAM has the peak warm air aloft at 21z to 0z so even if the column is saturated the flakes would be total crap, but at least in the NAM it doesn't bring in the dryness aloft until about 23z maybe even not until 0z based on the RH time height maps.

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LOL, I'm not losing it..I won't get much of anything...but I like forecasting too. When it's S+ and 18 at my house while MPM is pounding 3" of snow sand...we will see who loses it.

Haha, all ya lose it when the picnic tables get crushed. I was getting death threats after that one 12z ECMWF run that tracked the low into CT.

Everyone has their "this sucks" moment. Mine is usually getting left out of the party here when these events hit...then when I am having a party no one shows up :lol:

Good luck all you guys to the south. I think 8-12" for MPM, Dave, Dendrite, Dryslot, Blizz, ORH, etc is a lock. You guys are going to rip.

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Right, I was kinda expecting each band to be the next higher band on the map.  lol! 

 

Gold star. Technical difficulties arose on the mid shift.

 

We had our hand forced into a color scale change, which in turn knocked all categories over 3" off one level. So indeed we were thinking one range category higher than what you saw on the morning map. The bug is fixed now though.

 

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LOL, I'm not losing it..I won't get much of anything...but I like forecasting too. When it's S+ and 18 at my house while MPM is pounding 3" of snow sand...we will see who loses it.

 

You've got that right!!  Them be the worst. :)

 

Stick a fork in snow growth by 21z lol

 

 

Hellacious and noose-worthy.  There's the qpf/accumulation killer that allows ALY and GYX be more aggressive than BOX with their totals.

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Do any of the mets see anything with the current radar / surface maps / pressure falls, that indicate whether things are going one way or the other (east, vs. west)?

 

Ensemble sensitivity suggests that a deeper shortwave and higher heights near the Great Lakes at 00z last evening would be the key to a slightly deeper/further west surface low.

 

Based on model initializations at 12z, there is very good agreement with the morning soundings. Nothing glaring to says track shifting in a large way.

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Ray, check out the WRF from NWS BTV. You can see it here too. Note it becomes a bit less notable later in the aftn, but it is there. Pushes west a bit too. The idea is not to take it verbatim all the time, it just gives you an idea.

http://www.weather.gov/btv/4kmwrf

Nice look to it. 1pm scared me w nnw/sse orientation to 35f isotherm but then that pushes east

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Gold star. Technical difficulties arose on the mid shift.

 

We had our hand forced into a color scale change, which in turn knocked all categories over 3" off one level. So indeed we were thinking one range category higher than what you saw on the morning map. The bug is fixed now though.

 

 

Was not hard to tell it was your map as you seem to do more dabbling in the grids, I like the new color scheme, Removes doubt about what shade your in............ :)

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Princeton? Sorry to ask but limited phone posting during work hours.

sorry Jerry missed this

HIGH VISIBILITY HIGH IMPACT SNOW EVENT FOR ELEVATIONS OF E PA

AND NW NJ 9A-9P AND LIKELY A DEVELOPING IMPACT EVENT TO NEAR SEA

LEVEL JUST NW OF I95 WED AFTN/EVE**

930 AM ESTF: FIRST WARNING ISSUANCE NOW AS STERLING UPGRADES AND

MOVES FASTER AS WELL. WE WONT CHANGE ANY SNOW TOTAL GRIDS AT THIS

TIME. WE CONTINUE MORE UNCERTAINTY SE OF THE WARNING BUT NAM PROFILE

IS COLDER AT PHL WHICH COULD MEAN 3 TO 6 INCHES THERE EVEN DURING

THE DAY. POWER OUTAGES A CONCERN I95.

SUGGEST TRAVEL INTO E PA AND NW NJ COMPLETED NO LATER THAN 7 AM

WEDNESDAY, OR WAIT TIL AFTER 7 PM WEDNESDAY NIGHT. ITS THAT 12 HOUR

WINDOW THAT IS GOING TO BECOME A SIGNIFICANT TRAVEL PROBLEM, ESPECIALLY

THE HILLY AREAS.

ITS UNUSUAL TO FCST HEAVY WET SNOW IN A 1000-500MB 543-546 THICKNESS

WITHOUT A BIG SFC HIGH TO THE NORTH BUT THIS IS A SITN THAT I THINK

IT WILL OCCUR, ESPECIALLY ELEVATIONS FOR REASONS BELOW.

BARRING THE OFF LINE CHATTER OF AN IGW WHICH I DONT THINK WILL OCCUR

IN THIS SITN BECAUSE I THINK WE'RE LACKING A COUPLE OF ELEMENTS

INCLUDING SHORTENING WAVE LENGTH, THE SREF AND ECMWF MIX I THINK

HAVE BEEN STEADFAST ON ADVERTISING THIS EVENT. IF AN IGW WERE TO

OCCUR I DONT THINK TODAYS SCIENCE CAN BE SURE THIS FAR IN ADVANCE,

BUT PLEASE CORRECT ME. SUSPECT WE WONT KNOW TIL WED MORNING.

SO...AN INTENSIFYING 190M 12HR NEWD MOVING 500MB HFC COMBINES WITH

ISALLOBARIC GRADIENT TO PULL 0-6KM 1C OR LESS WBZ SEWD TO NEAR I95

DURING THE AFTN. ELEVATIONS CHANGE PTYPE FIRST.

PIVA AND COMMA HEAD SUGGEST SOME BANDING POTENTIAL VCNTY KRDG TO

KMPO DURING THE DAY. THE MAX UVM RIGHT NOW IS TENDING TO SHOW UP

BELOW THE IDEAL DENDRITIC GROWTH ZONE IN THE MULTI MODEL PROFILES

BUT THAT CAN CHANGE.    

 

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