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March 2026 Mid-Long Range


stormtracker
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27 minutes ago, Stormchaserchuck1 said:

I feel like we've been tracking this warmup forever. NWS has DC hitting 83F on Wednesday! While it's still technically Winter! 

Well, I recall March 2012 was insanely warm (+9 departure at DCA for the month), DCA hit 80+ degrees four times.  Only two nighttime lows at or below freezing, the rest were well above.  The cherry blossoms were essentially finished blooming by St. Patrick's Day since they came out very early.  I believe that was an extremely warm month for much of the eastern third of the country.

(ETA:  In fact, I remember seeing that some location in upper Michigan had a low temperature one day that was a few degrees warmer than the previous record HIGH for that particular date; it also of course broke a new record high).

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7 minutes ago, Scarlet Pimpernel said:

Well, I recall March 2012 was insanely warm (+9 departure at DCA for the month), DCA hit 80+ degrees four times.  Only two nighttime lows at or below freezing, the rest were well above.  The cherry blossoms were essentially finished blooming by St. Patrick's Day since they came out very early.  I believe that was an extremely warm month for much of the eastern third of the country.

(ETA:  In fact, I remember seeing that some location in upper Michigan had a low temperature one day that was a few degrees warmer than the previous record HIGH for that particular date; it also of course broke a new record high).

An interesting thing about March 2012 was actually how cold it was in the N. Hemisphere

3Oc-Bbp03N1.png

I recall almost hitting 90F that month

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10 minutes ago, Stormchaserchuck1 said:

An interesting thing about March 2012 was actually how cold it was in the N. Hemisphere

3Oc-Bbp03N1.png

I recall almost hitting 90F that month

Interesting.  Looks like most of the cold was on the other side of the hemisphere, as well as that strip of colder across northern Canada and AK.  I would imagine given that distribution, a huge and persistent ridge over the eastern half to 2/3 of North America and another over much of Europe/Scandinavia (though not as warm there).

It's kind of reminiscent of how warm December 2015 was here (similar warm departure).  I'm just grateful we got those large departures in December and March, and not a +9 in July!!!

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On 3/5/2026 at 11:59 PM, Stormchaserchuck1 said:

Euro seasonal going crazy for Strong El Nino later this year

IMG-8671-jpeg-4a67d2561dadb2ff47640ced96

 

On 3/6/2026 at 8:50 AM, GaWx said:

The Euro ENSO forecasts have a warm bias per looking at 20+ years of forecasts even as late as forecasts issued in early summer. Also, this chart is predicting ONI. RONI has now replaced ONI for official NWS monitoring:

https://www.cpc.ncep.noaa.gov/products/analysis_monitoring/enso/roni/

 RONI is currently ~0.5C cooler than ONI meaning that this chart is implicitly predicting only ~+1.6 in Sept rather than +2.1. If one then does a bias correction, they’d come up with only a low +1s RONI for Sept (moderate as of then) although it’s still rising then on the chart implying higher later.
 

@Stormchaserchuck1

More on the Euro warm bias for predicting ENSO ONI:

 

Euro JAS ONI March prog vs actual

2026: ~+1.5/?

2025: +0.26/-0.28

2024: -0.39/-0.07

2023: +1.11/+1.37

2022: +0.04/-0.87

2021: +0.10/-0.45

2020: +0.09/-0.53

2019: +0.94/+0.19

2018: +0.5/+0.3

2017: +1.1/-0.1

2016: -0.4/-0.5

2015: +1.8/+1.9

2014: +1.3/+0.1

2013: +0.4/-0.3

 

JJA:

2012: +0.6/+0.3

2011: -0.5/-0.6

2010: -0.3/-1.1

2009: +0.4/+0.5

2008: -0.6/-0.4

 

MJJ:

2007: -0.2/-0.5

2006: +0.3/0

 

JJA:

2005: +0.4/-0.1

 

Summary of March 2005-25 Euro ONI progs:

-2025’s +1.5 prog is 2nd warmest to 2015’s +1.8, which verified very closely

-14 too warm with 6 being 0.7+ too warm

-5 within 0.2 (2 of those El Niño)

-only 2 too cold, though 1 was El Niño, with both being 0.3 too cold and recent (2023 and 2024)

-Avg miss: +8/21 = +0.4 with largest +1.2 (twice)

-Avg miss for Nino alone: only +0.2 with misses being -0.3, +0.2, -0.1, +1.2, -0.1, +0.3

-Keep in mind that these progs are for ONI, not RONI

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14 hours ago, Stormchaserchuck1 said:

I feel like we've been tracking this warmup forever. NWS has DC hitting 83F on Wednesday! While it's still technically Winter! 

Promises, promises. We have had multiple forecasts of a warm-up that have not happened this winter, including the 70's-80's with sunshine last week. 

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