Jump to content
  • Member Statistics

    16,973
    Total Members
    7,904
    Most Online
    robrofox
    Newest Member
    robrofox
    Joined

August 2021


wdrag
 Share

Recommended Posts

19 hours ago, uncle W said:

Here's a link to historical weather maps for Aug 21-22 1888. Also check the wikipedia entry for 1888 H3. I noticed that BOS set their Aug 22 record with this same system (3.36").

https:/www.wetterzentrale.de/reanalysis.php?map=2&model=noaa&var=1&jaar=1888&maand=08&dag=22&uur=0000&h=0&tr=360&nmaps=24#mapref

The 4.19" at NYC on 21st was topped up with 0.13" more on 22nd for a total event rainfall of 4.32" 

Link to comment
Share on other sites

10 hours ago, rclab said:

That’s a picture and a loud and clear thousand words, thank you. As always …

Brian B found a higher NYC hourly rainfall total before the trees were covering the site. This total is more in line with the airport station hourly records. The article below has a photo of the site before the excess tree growth.


https://vlab.noaa.gov/web/nws-heritage/-/100-years-of-weather-observations-at-belvedere-castle-in-central-park

Original sitting before the tree growth 

9DFE2563-9E30-4891-96B1-7363C903B3DD.jpeg.3307ec95b22df943c9b96a947d157e53.jpeg

Most recent photo from 2013 with trees growing over the sensors

E47FC41F-CCAD-41B8-AB02-B1984C00379C.jpeg.2a794124c514541c5b027aaad50fe05c.jpeg

 

 

 

  • Like 2
  • Thanks 2
Link to comment
Share on other sites

1 hour ago, bluewave said:

Brian B found a higher NYC hourly rainfall total before the trees were covering the site. This total is more in line with the airport station hourly records. The article below has a photo of the site before the excess tree growth.


https://vlab.noaa.gov/web/nws-heritage/-/100-years-of-weather-observations-at-belvedere-castle-in-central-park

Original sitting before the tree growth 

9DFE2563-9E30-4891-96B1-7363C903B3DD.jpeg.3307ec95b22df943c9b96a947d157e53.jpeg

Most recent photo from 2013 with trees growing over the sensors

E47FC41F-CCAD-41B8-AB02-B1984C00379C.jpeg.2a794124c514541c5b027aaad50fe05c.jpeg

 

 

 

IPS-256720CC-8A10-4E2D-A0A9-30906DB9C8E3.pdf (noaa.gov)

Link to comment
Share on other sites

1 hour ago, bluewave said:

Brian B found a higher NYC hourly rainfall total before the trees were covering the site. This total is more in line with the airport station hourly records. The article below has a photo of the site before the excess tree growth.


https://vlab.noaa.gov/web/nws-heritage/-/100-years-of-weather-observations-at-belvedere-castle-in-central-park

Original sitting before the tree growth 

9DFE2563-9E30-4891-96B1-7363C903B3DD.jpeg.3307ec95b22df943c9b96a947d157e53.jpeg

Most recent photo from 2013 with trees growing over the sensors

E47FC41F-CCAD-41B8-AB02-B1984C00379C.jpeg.2a794124c514541c5b027aaad50fe05c.jpeg

 

 

 

This shows that there is potentially a lot of good information that could become accessible to researchers and the public with a large-scale digitization effort.

Link to comment
Share on other sites

27 minutes ago, donsutherland1 said:

This report suggests that 1.46” was the hourly figure on 8/12/1926 not 2.48” (p.91).

 

it says on the 12th precip started 3pm and ended 525pm before starting up again...2.45" fell between 3-5pm...

  • Like 1
Link to comment
Share on other sites

Henri moved away from the region after producing the highest 3-day summer rainfall on record in Central Park. During August 21-23, 8.19" of rain was measured. That easily surpassed the prior 3-day summer record of 7.20" from August 11-13, 1955.

South of New York City, temperatures soared well into the 80s and 90s. Baltimore, Harrisburg, Newark, Philadelphia, and Washington, DC all saw the thermometer reach 90° or above. That heat will move northward tomorrow. Much of the remainder of this week will feature unseasonably warm temperatures.

90° Days for Select Cities (through August 23):

Albany: 4 (2020: 13 days; 5-Year Average: 13.6 days)
Allentown: 21 (2020: 24 days; 5-Year Average: 27.6 days)
Baltimore: 44 (2020: 46 days; 5-Year Average: 44.6 days)
Boston: 20 (2020: 14 days; 5-Year Average: 17.2 days)
Bridgeport: 10 (2020: 11 days; 5-Year Average: 13.4 days)
Burlington: 9 (2020: 20 days; 5-Year Average: 13.0 days)
Harrisburg: 29 (2020: 35 days; 5-Year Average: 30.6 days)
Hartford: 21 (2020: 39 days; 5-Year Average: 29.0 days)
Islip: 6 (2020: 8 days; 5-Year Average: 9.4 days)
New York City-JFK: 8 (2020: 12 days; 5-Year Average: 10.2 days)
New York City-LGA: 21 (2020: 34 days; 5-Year Average: 29.4 days)
New York City-NYC: 14 (2020: 20 days; 5-Year Average: 18.2 days)
Newark: 34 (2020: 32 days; 5-Year Average: 31.2 days)
Philadelphia: 32 (2020: 36 days; 5-Year Average: 34.6 days)
Scranton: 16 (2020: 25 days; 5-Year Average: 16.4 days)
Washington, DC: 40 (2020: 46 days; 5-Year Average: 50.8 days)

New York City-Newark Average: 20 (2020: 22 days)
...Expected: 21 (based on regression equation tied to JFK-LGA-EWR data)

The ENSO Region 1+2 anomaly was -0.1°C and the Region 3.4 anomaly was -0.9°C for the week centered around August 18. For the past six weeks, the ENSO Region 1+2 anomaly has averaged +0.41°C and the ENSO Region 3.4 anomaly has averaged -0.43°C. Neutral ENSO conditions will likely prevail into mid-September. Afterward, La Niña could begin to develop.

The SOI was +5.04 today.

The preliminary Arctic Oscillation (AO) figure was -1.173 today.

On August 21 the MJO was in Phase 2 at an amplitude of 0.963 (RMM). The August 20-adjusted amplitude was 1.443 (RMM).

Based on sensitivity analysis applied to the latest guidance, there is an implied 83% probability that New York City will have a warmer than normal August (1991-2020 normal). August will likely finish with a mean temperature near 77.3° (1.3° above normal).

 

Link to comment
Share on other sites

 The last 8 days of August are averaging 84degs.(75/93), or +11.

Month to date is  77.0[+0.4].         August would end at 78.8[+2.8], but more likely near 77.1[+1.1].

75*(92%RH) here at 6am, hazy.         78* by 9am.       80* at 10am.      82* at 11am.      83*(61%RH) at Noon.         88*(50%RH) at 3pm       90*(45%RH) at 4pm.         91*(42%RH) at 4:15pm.        92*(42%RH)  at 4:30pm.         93*(40%RH) at 5pm.

Link to comment
Share on other sites

NYC is on the verge of having its first July and August to both reach 10” of rain. Three Julys and three Augusts picked up 10”. But never before in the same summer. This only occasionally happens in Miami. The last summer there to do this was 2019.
 

Monthly Total Precipitation for NY CITY CENTRAL PARK, NY
Click column heading to sort ascending, click again to sort descending.
Year
Jul
Aug
Season
1889 11.89 4.27 16.16
1975 11.77 3.05 14.82
2021 11.09 9.65 20.74


 

Monthly Total Precipitation for NY CITY CENTRAL PARK, NY
Click column heading to sort ascending, click again to sort descending.
Year
Jul
Aug
Season
2011 3.03 18.95 21.98
1990 3.51 12.36 15.87
1955 0.51 10.86 11.37


 

Monthly Total Precipitation for Miami Area, FL (ThreadEx)
Click column heading to sort ascending, click again to sort descending.
Year
Jul
Aug
Season
Mean 8.70 9.91 18.61
2021 8.18 5.52 13.70
2020 10.26 7.44 17.70
2019 10.54 15.74 26.28
2018 8.02 9.58 17.60
2017 12.45 8.57 21.02
2016 4.11 13.77 17.88
2015 5.91 9.02 14.93
2014 10.29 9.07 19.36
2013 12.70 4.43 17.13
2012 8.92 15.92 24.84
2011 5.71 11.08 16.79
2010 7.36 8.75 16.11
  • Like 1
Link to comment
Share on other sites

Morning thoughts…

The rain has departed, but heat and humidity have arrived…

Today will be mostly sunny and very warm. High temperatures will likely reach the upper 80s and lower 90s in most of the region.  Likely high temperatures around the region include:

New York City (Central Park): 89°

Newark: 94°

Philadelphia: 93°

Normals:

New York City: 30-Year: 82.5°; 15-Year: 82.2°

Newark: 30-Year: 83.8°; 15-Year: 83.8°

Philadelphia: 30-Year: 85.0°; 15-Year: 84.6°

The very warm weather will continue through Friday.

Link to comment
Share on other sites

87/67 here before noon.  Places in NJ could have a 5 day heatwave Mon (8/23) who hit 90 monday.  Tue (8/24) through Fri (8/27) heat is on.  850 temps peak in the >18c range Wed / FRi before the front this weekend.  Next week Mon (8/30) into mid week looks like the next chance at heat and more 90s.

 

Longer range overall warm/humid into the start of next month.

Link to comment
Share on other sites

26 minutes ago, SACRUS said:

EWR and some sites in Central and North Jersey will make a run on 40 90(+) days this week.  Look to add more to those totals as we get into the end of the month and next month.

Yeah, today is the 36th day to reach 90° at Newark. The airport finished the season with 45.7” of snow. So this could only be the 2nd time on record along with 2010 to reach 40” of snow and 40 days of 90°.
 

Time Series Summary for NEWARK LIBERTY INTL AP, NJ - Jan through Dec
Click column heading to sort ascending, click again to sort descending.
Rank
Year
Number of Days Max Temperature >= 90 
Snowfall
1 2010 54 47.9
2 1993 49 28.8
3 1988 43 22.8
4 2002 41 3.6
- 1991 41 21.5
5 2016 40 32.8
- 1983 40 31.0
- 1959 40 17.8
  • Like 1
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...