Re: 12/16-12/17 Godzilla: Final Snow Map & Obsevations

by **heehaw453** Wed Dec 16, 2020 10:40 am

@mikeypizano wrote:...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM EST
THURSDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 18 to
24 inches.

* WHERE...Southern Wayne, Pike, Lackawanna, Luzerne and Wyoming
counties.

* WHEN...Until 10 AM EST Thursday.

* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions will likely impact the evening and
Thursday morning commutes.

* ADDITIONAL DETAILS...Snowfall rates of 2 to 3 inches per hour
are possible late this afternoon and through the overnight.
East to northeast winds at 10 to 20 mph with gusts to 30 mph,
especially at higher elevations, may cause some blowing snow and
isolated power outages.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency.

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission strongly encourage motorist to heed all
travel restrictions and delay unnecessary travel. Visit
www.511pa.com for the latest travel, roadways, and traffic
conditions.

&&

Looks like I will be getting hammered!

WOW!!!

by **amugs** Wed Dec 16, 2020 10:41 am

This map will STAND AS CALLED this morning. No sense in micromanaging what we feel is a good product. If less sleet, lower end of the ranges verify. If more, the higher end. If minimal, locally higher possible. Battle zone nearest I-95. Sleet areas change to snow later overnight.

12/16-12/17 Godzilla: Final Snow Map & Obsevations - Page 5 Fb_img13

by **SoulSingMG** Wed Dec 16, 2020 10:44 am

I still hate the GFS inherently, but this is another step in the right direction for our relationship.

12z

12/16-12/17 Godzilla: Final Snow Map & Obsevations - Page 5 9015df10

by **heehaw453** Wed Dec 16, 2020 10:48 am

The GFS 12Z is very consistent with taking the 700mb/850mb lows over or just south of NYC. It's been rock steady on that. That keeps the thermals colder. The dry slot would be your biggest threat to snowfall amounts in that case.

by dsix85 Wed Dec 16, 2020 10:49 am

Frank-anticipated start & end time still holding firm to your prediction?

by **essexcountypete** Wed Dec 16, 2020 10:49 am

@SoulSingMG wrote:I still hate the GFS inherently, but this is another step in the right direction for our relationship.

12z

Your true friends will warn you not to fall back into bad relationships. The GFS will always betray you. Razz

by **sroc4** Wed Dec 16, 2020 10:50 am

Here are the majoir differences in why the GFS and the NAM are different. At 700mb you can clearly see the orientation on the NAM is SW to NE and further N overall. GFS on the other hand is oreinted more W to E and is further S.

This means less warm nosing into the coast plain on the GFS

While I didnt post the map below the 850 low passes south of LI which keeps that level below freezing for all. Its a subtle detail but little wobbles to these mid level features will mean ALLLLL the difference.

12/16-12/17 Godzilla: Final Snow Map & Obsevations - Page 5 Nam10

12/16-12/17 Godzilla: Final Snow Map & Obsevations - Page 5 Gfs13

by **Frank_Wx** Wed Dec 16, 2020 10:52 am

@dsix85 wrote:Frank-anticipated start & end time still holding firm to your prediction?

Yes!

by **amugs** Wed Dec 16, 2020 10:53 am

@rb924119 wrote:

This is my last post for a while, as I’ll be heading to work, but will follow along as best I can.

He's a warmicists and its about he track they dont have CAD we will have for God's sake its 200 plus miles from us - though there will be a warm tongue push but the air is very cold dense air and its being pumped down by a 1040 HP that has been jacked up by 939 LP over Newfoundland - lets not forget that!

Snowing moderately by my son at Penn State in State College - earlier than expected!!

by **Frank_Wx** Wed Dec 16, 2020 10:53 am

@sroc4 wrote:Here are the majoir differences in why the GFS and the NAM are different. At 700mb you can clearly see the orientation on the NAM is SW to NE and further N overall. GFS on the other hand is oreinted more W to E and is further S.

This means less warm nosing into the coast plain on the GFS

While I didnt post the map below the 850 low passes south of LI which keeps that level below freezing for all. Its a subtle detail but little wobbles to these mid level features will mean ALLLLL the difference.

True, but I still hate the H7 vort being right over us. Someone is going to pay for that.

12/16-12/17 Godzilla: Final Snow Map & Obsevations - Page 5 Gfs_z700_vort_neus_5

12/16-12/17 Godzilla: Final Snow Map & Obsevations - Page 5 Gfs_z700_vort_neus_5

by bloc1357 Wed Dec 16, 2020 10:56 am

Looking out my window at work can see the line of the advancing clouds/storm from the south

by **Frank_Wx** Wed Dec 16, 2020 10:57 am

Today is going to be an epic battle between warm vs cold air. Tracking it will be lots of fun.

Current temps:

12/16-12/17 Godzilla: Final Snow Map & Obsevations - Page 5 Temps

12/16-12/17 Godzilla: Final Snow Map & Obsevations - Page 5 Temps

Current wet bulb temps. Based off these two images, you can kind of tell where the R/S line might be.

12/16-12/17 Godzilla: Final Snow Map & Obsevations - Page 5 Wet

12/16-12/17 Godzilla: Final Snow Map & Obsevations - Page 5 Wet

Current surface depiction. Our storm is getting going off the coast of NC. The red line is the latest GFS track. This is what you want to track all day long. Does the low follow the due north-northwest path, or does it stay more north-northeast.

12/16-12/17 Godzilla: Final Snow Map & Obsevations - Page 5 Gfs

12/16-12/17 Godzilla: Final Snow Map & Obsevations - Page 5 Gfs

by **hyde345** Wed Dec 16, 2020 11:04 am

@mikeypizano wrote:...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM EST
THURSDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 18 to
24 inches.

* WHERE...Southern Wayne, Pike, Lackawanna, Luzerne and Wyoming
counties.

* WHEN...Until 10 AM EST Thursday.

* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions will likely impact the evening and
Thursday morning commutes.

* ADDITIONAL DETAILS...Snowfall rates of 2 to 3 inches per hour
are possible late this afternoon and through the overnight.
East to northeast winds at 10 to 20 mph with gusts to 30 mph,
especially at higher elevations, may cause some blowing snow and
isolated power outages.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency.

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission strongly encourage motorist to heed all
travel restrictions and delay unnecessary travel. Visit
www.511pa.com for the latest travel, roadways, and traffic
conditions.

&&

Looks like I will be getting hammered!

You snowplow right? If so you better get some rest because you are going to be busy.

by **billg315** Wed Dec 16, 2020 11:05 am

27* and Cloudy Dewpoint 14* here at home base.

by **heehaw453** Wed Dec 16, 2020 11:06 am

26.5/15

Winds are already moving the trees just a bit...

by **billg315** Wed Dec 16, 2020 11:07 am

Current radar situation:

12/16-12/17 Godzilla: Final Snow Map & Obsevations - Page 5 2647cd10

by **Scullybutcher** Wed Dec 16, 2020 11:07 am

Let me ask this if possible. From what we have seen on the models which model is closest to actual setup so far?

by **weatherwatchermom** Wed Dec 16, 2020 11:07 am

@Frank_Wx wrote:Today is going to be an epic battle between warm vs cold air. Tracking it will be lots of fun.

Current temps:

Current wet bulb temps. Based off these two images, you can kind of tell where the R/S line might be.

Current surface depiction. Our storm is getting going off the coast of NC. The red line is the latest GFS track. This is what you want to track all day long. Does the low follow the due north-northwest path, or does it stay more north-northeast.

Good Morning,
I did not follow along yesterday(had a migrane and threw a tantrum..when I saw things going down hill..) back to my self today!! so I have a question on the first map..the cold line is the purple line. I am a tiny bit above the battle zone area..so I want to understand as I follow along. Currently at 31* with the real feel of 26 feel and smells like snow!! what ever we get we get..TIA winds are steady at 10 funny some coming out of north east other out of south east..is that part of the battle????

by **sroc4** Wed Dec 16, 2020 11:10 am

The other intricate part of this equation is that the engine to the precip and intense rates isnt realy due to an intense bombing low due to phasing N and S energy followed by your classic comma shaped CCB. Instead its a purely southern stream system coming up the coast with enhanced lift being driven by a very steep pressure gradient combined with an upper level jet streak to our NE and a very strong baroclinic zone as the warm southern system runs into the cold arctic air. Because of this and cold dew points wet bulbing will also need to be factored in when looking at the warm nose and the heavy bands etc. Very intricate set up with many moving parts

by **amugs** Wed Dec 16, 2020 11:12 am

Can we trust the GFS Skew T?? It shows this red box area sounding not getting above 32* this keeping us all snow from about the Driscoll bridge N

12/16-12/17 Godzilla: Final Snow Map & Obsevations - Page 5 EpXuo6RWEAwsOWX?format=jpg&name=medium

12/16-12/17 Godzilla: Final Snow Map & Obsevations - Page 5 EpXuo6RWEAwsOWX?format=jpg&name=medium

by **Frank_Wx** Wed Dec 16, 2020 11:16 am

@billg315 wrote:Current radar situation:

Some of that might be virga

Also, does anyone know what is wrong with this radar? It is my favorite one, but when I post it in the forum, it shows a completely different time stamp

12/16-12/17 Godzilla: Final Snow Map & Obsevations - Page 5 Inxr1Kphla_h

12/16-12/17 Godzilla: Final Snow Map & Obsevations - Page 5 Inxr1Kphla_h

But if you click the link, it should be correct.

http://sirocco.accuweather.com/nxssa_r1_h_500x620d/r1h/inxr1Kphla_h.gif

by **aiannone** Wed Dec 16, 2020 11:16 am

29.1/9 here

by **Frank_Wx** Wed Dec 16, 2020 11:18 am

@weatherwatchermom wrote:
@Frank_Wx wrote:Today is going to be an epic battle between warm vs cold air. Tracking it will be lots of fun.

Current temps:

Current wet bulb temps. Based off these two images, you can kind of tell where the R/S line might be.

Current surface depiction. Our storm is getting going off the coast of NC. The red line is the latest GFS track. This is what you want to track all day long. Does the low follow the due north-northwest path, or does it stay more north-northeast.

Good Morning,
I did not follow along yesterday(had a migrane and threw a tantrum..when I saw things going down hill..) back to my self today!! so I have a question on the first map..the cold line is the purple line. I am a tiny bit above the battle zone area..so I want to understand as I follow along. Currently at 31* with the real feel of 26 feel and smells like snow!! what ever we get we get..TIA winds are steady at 10 funny some coming out of north east other out of south east..is that part of the battle????

Yes it is! Your wet bulb temps looks lower than your current temp, and that will be key to watch as well. Especially see how it looks say 2 hours from now.

by **aiannone** Wed Dec 16, 2020 11:19 am

@Frank_Wx wrote:Today is going to be an epic battle between warm vs cold air. Tracking it will be lots of fun.

Current temps:

Current wet bulb temps. Based off these two images, you can kind of tell where the R/S line might be.

Current surface depiction. Our storm is getting going off the coast of NC. The red line is the latest GFS track. This is what you want to track all day long. Does the low follow the due north-northwest path, or does it stay more north-northeast.

FWIW, the r/s line based off those images are exactly where the latest RPM has the r/s. Just south of LI. Budges into the south shore for an hour or so and then back to snow well offshore.

by **aiannone** Wed Dec 16, 2020 11:20 am

Upton picking up on current obs:

'Forecast is generally on track. Temperature are a bit cooler
than previously forecasted, so lowered hourly and max
temperatures today. Also, winds are higher, so increased wind
speeds through the morning. This may be due to slightly higher
pressure in southeastern Canada than the models were showing
previously."

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