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April 2020


donsutherland1
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1 hour ago, bluewave said:

16th day in a row with a negative temperature departure in NYC. This is a rare feat after April 15th. Most of our streaks this long have occurred from November into March.

 

2020-04-15 -4.9
2020-04-16 -9.3
2020-04-17 -10.1
2020-04-18 -10.5
2020-04-19 -2.8
2020-04-20 -2.2
2020-04-21 -5.0
2020-04-22 -11.8
2020-04-23 -9.6
2020-04-24 -10.5
2020-04-25 -1.8
2020-04-26 -10.1
2020-04-27 -12.4
2020-04-28 -3.2
2020-04-29 -4.5
2020-04-30 -3.0

 

 

what are some of our longer streaks recent, Chris?  I'm thinking Feb 2014, Dec 2010-Jan 2011, etc.

For the warm season, maybe Summer 2009 or Summer 1992 (after the Pinatubo eruption?)

 

 

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It looks like portions of the area may begin to get into some heavier rains over the next couple of hours by the looks of the radar. I still think E NJ comes in with less then what the models were originally showing. We'll see what happens tonight into tomorrow morning. We may do better tomorrow afternoon with some convection.

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3 minutes ago, Rtd208 said:

It looks like portions of the area may begin to get into some heavier rains over the next couple of hours by the looks of the radar. I still think E NJ comes in with less then what the models were originally showing. We'll see what happens tonight into tomorrow morning. We may do better tomorrow afternoon with some convection.

I love when people try and say a storm was a bust before it even happens. And then when conditions verify, try and find a way to downplay it or nitpick. Not saying that anyone is getting 3-4" tonight but the moisture is there. Just a matter of how quickly things move through.

Looks like a bust to me :weenie:

Click for latest Composite Reflectivity radar image from the Mt. Holly, NJ radar and current weather warnings

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36 minutes ago, LibertyBell said:

what are some of our longer streaks recent, Chris?  I'm thinking Feb 2014, Dec 2010-Jan 2011, etc.

For the warm season, maybe Summer 2009 or Summer 1992 (after the Pinatubo eruption?)

 

 

Our recent long streaks were 16 days in November 2018 and 22 days in March 2018. 

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33 minutes ago, NJwx85 said:

I love when people try and say a storm was a bust before it even happens. And then when conditions verify, try and find a way to downplay it or nitpick. Not saying that anyone is getting 3-4" tonight but the moisture is there. Just a matter of how quickly things move through.

Looks like a bust to me :weenie:

Click for latest Composite Reflectivity radar image from the Mt. Holly, NJ radar and current weather warnings

Just getting into the core of the heaviest rain activity.  0.44” so far.  I am thinking 1 - 1.5” out here in the Lehigh Valley.  Earlier calls for 3-5” out here seem overdone as of now.

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2 minutes ago, Tatamy said:

Just getting into the core of the heaviest rain activity.  0.44” so far.  I am thinking 1 - 1.5” out here in the Lehigh Valley.  Earlier calls for 3-5” out here seem overdone as of now.

Yeah those numbers that the Euro had yesterday are probably overblown, but I don't personally see why people think they are getting less than an inch tonight. 

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Just now, kat5hurricane said:

The wind is the real story so far after a few torrential downpours earlier. Building shaking wind gusts here in Queens. The rain is run of the mill stuff.

This system has been a good wind producer out here as well.  The highest gust I have seen so far is 37 mph.  Many reports of gusts to 40 mph+ in and around the city and out on LI especially on the south shore.

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A cooler than normal April is now concluding. New York City had a mean temperature of 50.4°, which was 2.6° below normal.

Periods of heavy rain were moving from south to north along a slow-moving front this evening. Additional rain is likely tomorrow. Two-day rainfall amounts will likely range from 0.50"-1.50" with some locally higher amounts in excess of 2.00" The highest amounts will likely be north and west of New York City and Newark.

In the wake of the system, warmer conditions will return this weekend. However, the milder conditions will likely be short-lived. Overall, the first 10 days of May could see readings average 1.5° to 3.5° below normal in the northern Middle Atlantic and southern New England regions. Moderation could occur near mid-month.
 
The ENSO Region 1+2 anomaly was +0.2°C and the Region 3.4 anomaly was +0.6°C for the week centered around April 22. For the past six weeks, the ENSO Region 1+2 anomaly has averaged +0.53°C and the ENSO Region 3.4 anomaly has averaged +0.63°C. Neutral and occasionally warm ENSO conditions will likely prevail through mid-May. ENSO Region anomalies could begin a steady cooling during May.

The SOI has seen an increased tendency for positive values during April. During this month, the SOI was positive on 17 (57%) days. During the February-March period, the SOI was positive on 38% days. This shift in tendencies may further reinforce or reflect the idea that ENSO region anomalies could begin to cool.

The SOI was +0.43 today.

Today, the preliminary Arctic Oscillation (AO) figure was +0.766.

On April 29, the MJO was in Phase 3 at an amplitude of 1.747 (RMM). The April 28-adjusted amplitude was 1.916.

February 2020 saw the ENSO Region 1+2 anomaly increase by more than 0.50°C. Such a development has typically occurred before a warmer than normal summer. In all such cases, a warmer than normal spring was followed by a warmer than normal summer. Such a summer is now likely in much or all of the East.

The MJO was recently in Phase 1 at an amplitude in excess of 1.500 for two days. During the 1981-2019 period, the MJO was in Phase 1 at an amplitude of 1.500 or above for two or more years in six cases: 1988, 1990, 1995, 1997, 2005, and 2010. During May, three (50%) were cooler than normal; two (33%) were near normal; and, one (17%) was warmer than normal. Ultimately, two-thirds of those cases went on to have a warmer to much warmer than normal summer.

May will likely be cooler than normal in the northern Middle Atlantic and southern New England region with anomalies of 1°-2° below normal in much of the region.

 

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4 minutes ago, jm1220 said:

Looks like the models that broke up the rain shield as it got into NYC and east will be right. :axe:

Based on the radar it could just be some light showers for the rest of it and that's it. 

i still think eastern long island will get decent rains out of this.

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