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July 2020 General Discussions & Observations Thread


Rtd208
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3 hours ago, Rjay said:

@wdrag should start a Friday thread!

Hi!  The primary reason i didn't is it could be  a named storm, plus dealing with the uncertainty of this afternoons potential 2-4" clusters (not well modeled so far). Let's get to 9PM tonight and see where we're at.  I don't like to post wrong ideas, which I'm a little worried about for this afternoon.  For Tri-early Sat: (50% Fay?) Been a little concerned about ensemble and UKMET east of us on the Friday track which probably would feature most of the qpf along and east of the low. Haven't evaluated Friday more than cursory.  You're welcome to start the topic but for now, for myself working with the forum,  just waiting another 12 hrs or so to have a little more confidence. 

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28 minutes ago, wdrag said:

Hi!  The primary reason i didn't is it could be  a named storm, plus dealing with the uncertainty of this afternoons potential 2-4" clusters (not well modeled so far). Let's get to 9PM tonight and see where we're at.  I don't like to post wrong ideas, which I'm a little worried about for this afternoon.  For Tri-early Sat: (50% Fay?) Been a little concerned about ensemble and UKMET east of us on the Friday track which probably would feature most of the qpf along and east of the low. Haven't evaluated Friday more than cursory.  You're welcome to start the topic but for now, for myself working with the forum,  just waiting another 12 hrs or so to have a little more confidence. 

Even if it's a named storm you can create a topic in this subforum especially since it might affect our area.

We will wait until you're ready.  Thank you for all your contributions. 

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Tomorrow will be steamy with readings near or above 90° in a large part of the region.  

Late in the week into the weekend, parts of the region could be impacted by tropical moisture. At that time, the region could see some rounds of heavy rain and thunderstorms. The potential for a swath of 2"-4" rainfall amounts with some locally higher figures exists. The guidance remains in disagreement over the location where the heaviest rain will fall.

With a high temperature of 92°, Washington, DC registered its 13th consecutive day on which the temperature reached 90° or above. That is Washington's longest heat wave since July 21-August 2, 2016 when the temperature also reached 90° or above on 13 consecutive days.

The current predominantly warmer than normal pattern will likely persist through at least August, paving the way for a solidly warmer than normal summer throughout the region. Occasional short-lived cool shots remain possible Initially, extreme heat is unlikely, but that could change as July progresses, especially if the emerging drought continues to deepen. One or more heatwaves are likely in July across the region, including New York City.

The ENSO Region 1+2 anomaly was -1.1°C and the Region 3.4 anomaly was -0.1°C for the week centered around July 1. For the past six weeks, the ENSO Region 1+2 anomaly has averaged -0.65°C and the ENSO Region 3.4 anomaly has averaged -0.32°C. Neutral-cool conditions will likely prevail through mid-summer. The probability of the development of a La Niña event during late summer or early autumn has increased in recent weeks.

The last time the six-week moving average for ENSO Region 1+2 was as cold as the current figure during July or August occurred in 2013. Winter 2013-14 had neutral-cool ENSO conditions. January and February featured ENSO Region 3.4 anomalies that were -0.50°C or below.

The SOI was +1.66.

Today, the preliminary Arctic Oscillation (AO) figure was -0.359.

On July 7, the MJO was in Phase 1 at an amplitude of 2.650 (RMM). That was the fourth highest amplitude in July when the MJO was in Phase 1. The July 6-adjusted amplitude was 2.605.

That was the 18th consecutive day the MJO was in Phase 1. The last time the MJO had at least as long a stretch in Phase 1 occurred during September 21-October 8, 2019 when the MJO was also in Phase 1 for 18 consecutive days. In addition, the MJO has been in either Phase 1 or Phase 2 for 38 consecutive days.

Last year, the MJO went through a very strong passage through Phase 1 during the closing days of May. About four weeks later, a warmer than normal pattern locked in and predominated through early autumn. This year, the MJO was in Phase 1 for 3 consecutive days with an amplitude of 1.500 or above during the June 1-3 period.

Last year, the SOI fell to -42.04 on June 22 when the MJO was in Phase 6. This year, the SOI plunged below -46.68 on June 5, its lowest level in more than three years. The dramatic plunge in the SOI could be the proverbial spark that kicks off a sequence of events leading to the development of a sustained warmer than normal period. The cases that saw both the MJO and SOI thresholds satisfied generally saw 10-20 days where the temperature reached or exceeded 90° in New York City during the July 1-August 31 period.

Based on sensitivity analysis applied to the latest guidance, there is an implied 71% probability that New York City will have a warmer than normal July. July will likely finish with a mean temperature near 79.0°.

 

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The next 8 days are averaging 85degs., or about 7degs. AN.

GFS has 8 100's starting July 16.    No comment.       At least Dallas/Fort Worth beats us with 16 straight 100's.     They once actually had 43 straight happen.

Latest NAM drops from  3" to just 0.5" for tomorrow.     Keep up the good work boys, you are due for a 'raise'------to the window sill and OUT!  lol.

75* here at 6am(95%RH)hazy blue.      75* FOG<0.1 at 7am.       Fog lifted by 9am, 76*---but not really clear.

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77/74 here in Havana (I mean CNJ).  Low clouds burning off with a general S/SE flow.  Very warm airmass >18c (850 temps) should allow 90 degree readings in places that stay sunny away from the coast.  The storm that could be Fay will bring 2 - 4 swath of rains Fri PM into Sat AM PM.  Clear things out Sunday and begin the warmup as ridge builds over the Mid West and Mid Atalntic / Northeast 7/15 - D12 and beyond.  Western Atlantic ridge builds west and may hook with the MW ridge and enhance heights the week of the 7/19.  Perhaps the hottest airmass of the season and in a few years.  Could push triple digits in LGA, EWR, JFK, PHL, TTN.  Does look to include regular storms which should help keep things wetter.  Pushing a hot July and w'll see if we go more 2013 / 2017 like which was followed by a cooler / wetter August or do we continue the hot run like 2016,2012 and keep the wamrth into August,

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