Jump to content
  • Member Statistics

    17,608
    Total Members
    7,904
    Most Online
    Vesuvius
    Newest Member
    Vesuvius
    Joined

Recommended Posts

2022 has begun with more unseasonable warmth. But a turn toward colder weather lies ahead in the medium-range. After an warm start tomorrow, temperatures will tumble late in the day.

In the South, more near record and record heat prevailed for a final day of what has been an extraordinary month-long period of exceptional warmth. Preliminary records included:

Birmingham: 80° (old record: 78°, 1952)
Brownsville: 89° (old record: 83°, 1955 and 1989)
Corpus Christi: 92° (old record: 84°, 2006) ***Tied January Record***
Galveston: 81° (old record: 76°, 1934) ***New January Record***
Houston: 85° (old record: 81°, 1917 and 2006) ***New January Record***
Jackson: 85° (old record: 81°, 1952) ***Tied January Record***
Mobile: 79° (tied record set in 1975)
Montgomery, AL: 83° (old record: 79°, 1952) ***Tied January Record***
New Orleans: 82° (old record: 81°, 2006)

January has commenced with an AO-/PNA- pattern. That typically favors somewhat cooler than normal readings in the East. For NYC, the January 1-10, 1991-2020 mean temperature for such cases was 33.5° (normal: 34.8°).

Late in the first week of January, the PNA could go positive. As that happens, the prospects for measurable snowfall could increase. Since 1990, 66% of days with 1" or more snow in New York City occurred when the PNA was positive. In addition, 81% of days with 4" or more snow occurred when the PNA was positive.

The latest guidance suggests that temperatures could head toward seasonal levels and then below seasonal levels as the first week of January progresses. The coldest air will likely remain confined to the Pacific Northwest, Northern Plains, and western and central Canada during that time. Afterward, the cold could press farther south into at least the northern Middle Atlantic and Ohio Valley regions. The colder pattern could last for two or perhaps three weeks before it breaks down. Thus, it could begin to break down sometime in the January 15-20 timeframe.    

The ENSO Region 1+2 anomaly was -1.3°C and the Region 3.4 anomaly was -1.1°C for the week centered around December 22. For the past six weeks, the ENSO Region 1+2 anomaly has averaged -1.25°C and the ENSO Region 3.4 anomaly has averaged -0.98°C. La Niña conditions will likely persist through meteorological winter.

The SOI was +3.82 today.

The preliminary Arctic Oscillation (AO) figure was -1.338 today.

On December 30 the MJO was in Phase 7 at an amplitude of 1.889 (RMM). The December 29-adjusted amplitude was 2.049 (RMM).

 

  • Like 1
Link to comment
Share on other sites

1 hour ago, Stormlover74 said:

Wow gfs gets a few inches up this way now and blasts areas further south 

 

 

Something looks wrong with the GFS's QPF algorithm. There's a pronounced dry layer around 700mb on the sounding throughout NJ and EPA etc. on Monday morning. Dewpoints are like -20 to -30C. And at the same time, the GFS is printing out QPF. That's virga. No way snow is reaching the ground through that dry air if the sounding is right.

Granted, H5 looks pretty decent for maybe SNJ to get clipped, but the GFS looks way off with QPF here.

  • Like 2
Link to comment
Share on other sites

3 minutes ago, eduggs said:

Something looks wrong with the GFS's QPF algorithm. There's a pronounced dry layer on the sounding throughout NJ and EPA etc. on Monday morning. Dewpoints are like -20 to -30C. And at the same time, the GFS is printing out QPF. That's virga. No way snow is reaching the ground through that dry air if the sounding is right.

Granted, H5 looks pretty decent for maybe SNJ to get clipped, but the GFS looks way off with QPF here.

The GFS is awful. What it shows on Monday for our area is obviously virga. I don’t know why this terrible model is even being entertained given its pathetic performance so far this winter and it has zero support, extreme outlier status for Monday…..

  • Like 1
  • Weenie 1
Link to comment
Share on other sites

1 minute ago, snowman19 said:

The GFS is awful. What it shows on Monday for our area is obviously virga. I don’t know why this terrible model is even being entertained given its pathetic performance so far this winter and it has zero support, extreme outlier status for Monday…..

It's possible the problem is mostly confined to the QPF parameter. It could be nailing the synoptics but just not properly accounting for dry air interaction with precipitation. I am a little intrigued by its H5 depiction. A closed low at H5 gets pretty far north this run.

  • Like 2
Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...