wdrag

CPC reasoning follows: As this storm tracks eastward, wet and windy conditions are possible across the East. A broad area is highlighted for a slight risk of rounds of heavy precipitation for the southeastern CONUS and East Coast as well as a slight risk of periods of heavy snow across the Southern to Central Appalachians and parts of the Northeast. The entirety of week-2 is designated for these hazards since the front could linger while extending from this surface low as it tracks towards the Northeast, in addition to possible reloading of the mid-level trough across the central CONUS at the end of the period. A moderate risk of heavy precipitation is designated for parts of the Southeast and East Coast, Jan 6-10, based on the ECMWF PET indicating at least a 30% chance of 3-day liquid equivalent exceeding the 85th percentile (>40% across the Northeast and Southeast) and uncalibrated guidance showing at least half an inch in a 24-hour period. The spatial coverage of this precipitation hazard is consistent with the background El Niño. Anticipated heavy precipitation could prolong flooding concerns across parts of the East Coast where there are currently gauges nearing or exceeding flood stage. A slight risk of high winds is posted for the East Coast for week-2 based on a favorable synoptic pattern and recent deterministic model guidance.

Hi... Nothing has changed for me at 5PM, from my morning thoughts on the 4th 6-7, 10. Here's CPC 3PM12/29 issuances for consideration (click for clarity)... we'll see what happens. Moderate risk heavy precip east coast, and a slight chance heavy snow WELL inland, and a chance of high winds east coast. IFFF things shape up consistently (esp EPS/CMC))... will attempt a reliable storm thread but probably not til sometime next week.

fwiw: yesterdays rainfall attached (after 7am ish), and the 3 day totals...max I could find about 3.46" Somerset County. Click for clarity. Forced at least one moderate flood in NNJ, and several minors. Now the recovery. NYC CP a little more than 1.5". Pushed the month to 6.66" #9 wettest since records began 1869 and #11 yearly with 59.24". My last on this event.

There is no doubt(in my mind) that events around the 4th, 7-8th, 10th and possibly well beyond, provide opportunity for snow-ice, at least down to I84 per 24 hours snow depth change ensembles in near normal temps though probs for more than 1" are rather low. NY eve ball drop might even show flurries nearby NYC w-n suburbs. All ensembles are above normal precip 4th-14th. Is it rain or snow/ice for I84? Even a chance of snow down to I95. Does it warm up after the 10th? Southern streamers look pretty active to me first 2-3 weeks of Jan.

Money. Buying back property or eminent domain. Don’t see that, but I do see being alert as to where you live, if finances permit

CoCoRaHs two rainfalls added for your check (please click for clarity). Am done with this rainfall posting til I do the 3 day tomorrow morning 830AM. HREF, just wish it had been further west. ou saw how conservative the BOM can be when taking all models into account (their variability of max amounts). You can check the original post for their forecast. Suspect that held us back 12 hours or more on a watch. I apologize for the wrong date in the headline (should have been Thu 12/28). I'm not going to change it now. The thread stands. Next, how much more rainfall for CP? Am pretty sure it gets to #11 yearly with over 1.5" for this event...probably 1.6-2" total. Also...if someone can check XMACIS on Dec/Yearly for EWR, TTN, ABE and post--- otherwise I can check for that late this eve. Saw the earlier helpful post on ABE Dec and yearly.

This was a good watch issuance for NJ by Mt Holly.

This part of Wantage 1.92". Most of the event rainfall was 8P-4A.. that's why sharp rises small streams.

Not yet, hopefully 930AM map.

Quick snap shot on rainfall amounts... more detail after 9AM. Max I see in the NYC suboforum is 3.4" Click for clarity,

Here's a display of NWS flood reports for this event.

Updated CP rainfall to 1.47" as of 7AM

Multiple ensembles offer "small"amount hope after Jan 4... My guess I'll have to get my driveway snow stakes in the ground sometime next weekend--hjoping for 4" by mid January here in nw NJ. There is more hope in a seasonably cool pattern with multiple shortwaves crossing USA west-east south of I80.

NYC CP at least 1.36. I'm anticipating another 0.2-0.6 for the entire NYC subforum between 7AM today and 7PM Friday. SFC trough west from the ocean low and upper air low pressure to our south are the causative factors. Plenty of minor stream flooding I95 corridor in NJ and heaviest moderate flooding in eastern PA, especially w of PHL. Modeling: EC and CMC seemed best to me when this thread started. GFS woeful... just no clue. In the shorter range... you can choose.. I think the HRRR/RGEM had best idea of 3" plus numbers (presuming that occurred nw NJ/e PA)... but high res short range location while west of the woeful GFS, varied back and forth from e PA into NJ. SPC HREF was too far east overall. This is not done... biggest occurred but aggravating additional amounts will prolong minor flooding episodes in NNJ/se NYS/CT into Friday--no evaporation. A map of amounts will post around 9A.

Started sooner than a thought I95 northwestward but not straying from expectations in this titled thread. Not til I see definite no chance 2-3” ne NJ.

Added 12z/26 Blend of models rainfall, the WPC 22z/26 three day rainfall forecast, and a sample from the 18z/26 HRRRX ending 18z/Thursday, which in my mind shows the potential narrow axis of 2-3"+ of rain. If that ends up over the Passaic River Basin, then minor flooding would resume on parts of the Passaic. We'll have to wait for reality to know what will result. There should be an axis of 2-3" rainfall near I95 and it could result in moderate impact for travel Thursday morning. This in addition to the overnight-Wednesday morning dense fog impact will mean some difficulties for air and surface travel. An additional 0.2-0.6" could fall in the NYC subforum 1P Thu-7P Friday with bands of rain/drizzle in the convergent surface trough region west from the departing low pressure system off New England, and to the north of the weakening upper low moving eastward off the mid-Alantic coast. If 2 inches occurs in Central Park by Friday night, that would push December into the top 5 rainfall (7.12"), and the year to #11 (59.23"). Central Park rainfall seems to have a pretty good chance of exceeding 1.5" but there is always uncertainty on qpf. So, another significant rain event is on the way. The 48 hour qpf from the SPC HREF, HRRR, RRFS from 00z/27 and 12z/27 cycles could be helpful perspectives if and where the potential exists for 3" of rain from this event. This thread headline and/or tags may update if the NWS issues flood watches.

I will begin a thread sometime between 8P and Mid for a widespread 1.25-3" rainfall event 1Pm Wed-1P Thursday, isolated 4" possible ne NJ/se NYS/s CT. Just want to see a little more data. I'll add a couple graphics. Most of the rain in a 12 hour period 9P Wed-9A Thu. This would result in a few small streams going into flood by Thursday afternoon, depending on location. Probably another 0.1-0.6" between 1P Thu and 7P Fri in periodic-areas of drizzle/rain.

Not posting a thread yet, for one primary reason... not sure yet if I want to do this as a 24 or 72 hour event, first 24 hours most important but the secondary rainfall Thu-Fri might be the straw that pushes minor flood for many streams in NNJ-e PA. For now I expect 1-3" of rain Wed-Fri, with at least several rivers going minor or possibly moderate e PA/NNJ into se NYS. Slow moving upper Low. Turns cold enough of possible back side ice or snow parts of the I84 corridor Friday afternoon-early Sat. Just not enough model cues to push a routine into a worthy thread. This is not the storm of 9 days ago. adding on 658AM. Wii look again this evening as time allows, but pretty sure will thread this evening. HRRR-SPC HREF and NWS Flood Watch combo of considerations for the what I think is a 60-70% chc of starting the water related flood potential thread.

Monitoring for a headline thread of flooding again for Wed-Thu 27-28, maybe topping off I84 with some snow late Friday-Sat. Still thinking 0.75-2" entire area by the time it quits for a while late Thursday. Of interest to me is potential for 4+" of rain portions of western NC by Wednesday morning which may translate newd. Probably not as serious as a week ago but am pretty sure a few rivers including a couple mainstems in NJ will go back into minor flood, if not moderate flood This event, seems to favor interior NJ/NY/e PA and along and west of I95. Small wet snow accumulation late Friday-early Sat for MA/NCT? All needing further consideration before wasting anyones time. Wish there were more wintry to focus upon. I guess patience is my best approach.

squinting!! hoping...

That little band of scattered radar returns in ne PA/nw NJ/se NYS is ice pellets. mPing has had some reports as well. EC was the only model to pick up on the spotty wintry early today, but only one cycle..I think it was the 00z/22 cycle.

Not threading anything for the 27th-29th. Ensembles offer NYC subforum around 1" of rain, give or take. River rises occur but generally within bank, except those that went to major a few days ago...those would rise back to minor flooding IF that rainfall occurs. Think it best to wait this out.

Can the pattern adjust enough to permit near normal snowfall for the NYC subforum In January, at least for the interior (10-15")? Have added some statistical information regarding the potential ahead including that note from Bluewave. We do sort of know that temps are going to cool down closer to normal the first week of January. Beyond the 2 week lead time of this initial Dec 23 thread starter, that's where our long rangers add further discussion. Verification added Feb 2 for Jan. You decide for yourselves the utility of the monthly. Temp looked a little shaky MT to Lower Miss Valley. The rain was shifted west and obliterated the outlook for lower Ohio Valley. Interior I think did get near or above normal snowfall for Jan (Wantage NJ 19") but NYC CP the 2.3" was 6.5" below normal. Number of Consecutive Days Snowfall < 2 for NY CITY CENTRAL PARK, NY Click column heading to sort ascending, click again to sort descending. Rank Run Length Dates Period of record: 1869-01-01 to 2023-12-21 1 691 2022-01-30 through 2023-12-21 2 685 1972-02-24 through 1974-01-08 3 521 1918-04-13 through 1919-09-15 4 416 1912-12-25 through 1914-02-13 5 406 1997-02-09 through 1998-03-21 6 386 1991-02-27 through 1992-03-18 - 386 1954-01-12 through 1955-02-01 8 385 1931-11-28 through 1932-12-16 9 377 1971-01-25 through 1972-02-05 10 366 2006-02-13 through 2007-02-1

Slight heads up Poconos---interior se NYS and extreme nw NJ: Scattered sprinkles of freezing rain or sleet are possible prior to 9AM. If it occurs, it would cause icy spots. Caution--especially Poconos. 442A/23

If is ok... will start Jan thread tomorrow morning 8A. Long day here. Always hope in the future... just not obvious to me about big snow, except it gets cooler first week Jan. Walt