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March 3-4, 2023 | NE. Winter Storm


MaineJay

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2 minutes ago, PA road DAWG said:

Gfs coming in way amped and northwest.  Def on its own island, for now. Takes primary all the way up thru Detroit.  On to something or on crack?!?   Def fits the storm track this season, but we shall see 

Just saw that.. and I thought it was starting to come into alignment with pretty much every other forecasting tool on earth. But.. here we are. 😐

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7 minutes ago, JDClapper said:

Just saw that.. and I thought it was starting to come into alignment with pretty much every other forecasting tool on earth. But.. here we are. 😐

CMC staying the course.  12z top, 0z bottom.

 

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43 minutes ago, PA road DAWG said:

Gfs coming in way amped and northwest.  Def on its own island, for now. Takes primary all the way up thru Detroit.  On to something or on crack?!?   Def fits the storm track this season, but we shall see 

Yeah i dont like the gfs itself trending that way.. may be a guidance catchup with the others over next couple days.. its been the pattern. 

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Well.. Euro definitely looks north of 00z. Still a decent event for PA, but not the blockbuster of the previous run. Definitely one to watch. 
 

UK the same.. 

Edited by Penn State
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winter recon flights going out tonight. Not sure how much data makes it into the 0z runs, drops begin at 26/2030, so some should.

Quote
000
NOUS42 KNHC 251740
REPRPD
WEATHER RECONNAISSANCE FLIGHTS
CARCAH, NATIONAL HURRICANE CENTER, MIAMI, FL.
1240 PM EST SAT 25 FEBRUARY 2023
SUBJECT: WINTER SEASON PLAN OF THE DAY (WSPOD)
         VALID 26/1100Z TO 27/1100Z FEBRUARY 2023
         WSPOD NUMBER.....22-087

I.  ATLANTIC REQUIREMENTS
    1. NEGATIVE RECONNAISSANCE REQUIREMENTS.
    2. OUTLOOK FOR SUCCEEDING DAY.....NEGATIVE.

II. PACIFIC REQUIREMENTS
    1. FLIGHT ONE - TEAL 71
       A. 27/0000Z
       B. AFXXX 28WSE IOP34
       C. 26/1800Z
       D. 25 DROPS APPROXIMATELY 60 NM APART WITHIN AN AREA BOUNDED BY:
          35.0N 125.0W, 35.0N 150.0W, 50.0N 150.0W, AND 50.0N 125.0W
       E. AS HIGH AS POSSIBLE/ 26/2030Z TO 27/0230Z

    2. SUCCEEDING DAY OUTLOOK: A USAF RESERVE WC-130J AIRCRAFT MAY
       FLY AN ATMOSPHERIC RIVERS MISSION OVER THE EASTERN PACIFIC
       FOR THE 28/0000Z SYNOPTIC TIME.
    3. ADDITIONAL DAY OUTLOOK: A USAF RESERVE WC-130J AIRCRAFT MAY
       FLY ANOTHER ATMOSPHERIC RIVERS MISSION OVER THE EASTERN PACIFIC
       FOR THE 01/0000Z SYNOPTIC TIME.

$$
WJM

NNNN

 

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For interior PA.. 12z EPS shows high prob of measurable white.  It has some bangers (like the op was), but not like previous versions.  The 850s mean temp is higher than op, so probably more mix as the primary holds on longer before transferring.  Verbatim, this would be an extremely typical 3-6" event with mixing/changeover issues here.  5 days to go.

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Sterling for any  in southern mid Atlantic.    
 

LONG TERM /WEDNESDAY THROUGH SUNDAY/... An area of low pressure located over the Plains on Wednesday will move over the Great Lakes throughout the day leading to increased cloud cover over our area and otherwise dry conditions. Afternoon high temperatures on Wednesday will be above normal due to southerly flow across the area. Rain showers are possible Wednesday night into Thursday as the low tracks to our north and the associated frontal boundaries pass over the area.

It`s at this point in the long term forecast where there is a good bit of model disagreement and uncertainty. A potent upper level trough located over the western US Wednesday, will track eastward Thursday and Friday digging deep into the central US. By Thursday, an area of low pressure develops along the trough and begins tracking towards our area. There are two main scenarios happening in the global model guidance regarding the specific track and impacts of the low. The 00Z Euro and 12Z Canadian have the low tracking just south of us bringing cooler air temperatures and wintry precipitation. Meanwhile, the 12Z GFS has the low tracking to our northwest bringing warmer air temps, heavy rainfall, and possible severe weather. Both of the scenarios have Thursday staying relatively mild with a few rain showers possible. Model guidance shows the low impacting our area throughout the day on Friday with light precipitation arriving in the morning and heavier precipitation arriving in the afternoon. Despite which scenario plays out, the approaching low late this week will impact our area in some way. Whether it is in the form of heavy rainfall, severe weather, or wintry precipitation, it is too early to tell. We will continue to monitor this system as it approaches

 

. High pressure will build in overhead in the wake of the low pressure on Saturday bringing mild conditions and dry weather.

 

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30 minutes ago, JDClapper said:

GFS trend since the beginning of time.

trend-gfs-2023022618-f138.sn10_024h-imp.us_ne.gif

THE GFS snow maps from pivotal always seem to show some weird gradients, particularly on the southern fringes.  I know their 10:1 look different than TTs, I wonder if they are trying to exclude sleet, and the 6 hour intervals make for an awkward distribution.

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