Chew & E Washington Lane Flooding – August 4, 2020

Tropical storm Isaias dropped 4.5 inches on Germantown – E Mt Airy on August 4th, causing flooding in lower areas. this video shows the situation at Chew & E Washington Lane.

Chew & E Washington Lane

The 2nd and 3rd videos shows flooding of the E Washington Lane underpass for the SEPTA R7 line.

E Washington Lane Underpass to SEPTA R7 Line
E Washington Lane Underpass to SEPTA R7 Line

E Mt Pleasant Ave & Sprague St Flooding – July 24, 2020

For the 2nd Friday in July, there was flooding in the historic Wingohocking Creek Watershed, this time at E Mt Pleasant Ave and Sprague St. The previous July 2020 flood occured at Belfield and Church on July 10th (link).

Here is a short video that shows the flooding between the SEPTA bridge and Devon St.

This flooding was caused by the blocked stormwater inlet shown in this picture.

The July 11th Belfield and Church flooding (link), on the other hand, was caused by too much stormwater runoff overwhelming the sewers in that area.

The July 24 rainfall for Philadelphia is shown in this map which shows that our area got 1.5 – 2 inches and parts of Germantown got 2.5 – 3 inches.

As our global climate warms, we are seeing more intense rain storms. The July 10 and July 24 storms are an example of what we can expect. Please let me know if you see historic Wingohocking Watershed flooded intersections, railroad underpasses of other flooding so that we can log and document them to make sure that the City is aware and taking steps to both clear our inlets and increase our combined sewer capacity to reduce future flooding.

If you live near on of PWD’s 24 flood prone intersections (link) please be sure to get homeowners – renters insurance.

Philadelphia Rainfall From Tropical Storm Fay.

Tropical Storm Fay (link1, link2) passed through Philadelphia on July 10, 2020. This storm dumped 2 – 4 inches of rain on the Philadelphia area from about 8:00 AM to 4:00 PM on Friday, July 10th.

This plot shows NOAA’s Advanced Hydrologic Prediction Centers (AHPC) precipitation map for Philadelphia as of 8:AM on July 11, 2020.

The map shows the historic Wingohocking Creek Watershed which covers a major portion of NW Philadelphia. You can see that the Wingohocking Watershed received anywhere from 2.5 to 4 inches of rain over this storm.

This storm caused significant flooding at Belfield and Church. A local resident captured the video of the flooded intersection and posted it on Facebook at this link.

Pennylvania Derecho

E Mt Aairy – Germantown – Ogontz Flood Prone Intersections

Here is a more detailed map of the 24 flood prone intersections. Right click image to see larger view in new window.

Here is the list of the 24 intersections identified by PWD.

This link gives you a PDF file of PWD’s Task 6 report.

COVID-19 Confirmed Cases – March 29, 2020

COVID-19 confirmed cases continue to rise at exponential rates in the US. Here is a plot of Our World Data’s 3/29/20 confirmed COVID-19 cases for US, Italy, Spain, UK, China and S

COVID19_Trajectory_3_29_20

China and S Korea’s trajectories have flattened, Italy seems to be rising at a slower rate while the US and UK do not show any decrease in growth rates as of 3/29/20.

 

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COVID-19 Update: 3/21/20

COVID19_Trajectory_3_21_20

The US and Spain’s COVID-19 confirmed cases since the 100th case are now higher than Italy was on the same day since their 100th case.

South Korea has bent their curve while Italy has not. The US and Spain seem to be following Italy’s trajectory, not South Korea’s trajectory.

Tracking COVID-19 Cases: Update on 3/21/20

COVID-19 cases are increasing at exponential rates across many countries. Our World Data (link) is providing daily updates on the number of confirmed COVID-19 by country. Here is the March 20, 2020 chart.

Confirmed_Cases_3_20_20

This interactive chart lets you highlight the trajectory for a specific country and compare it to the number of confirmed cases for other countries by day after the 100th confirmed case. Viewers can also download a CSV file of the data by pressing the DATA tab. this can be helpful to to prepare COVID-19 trajectory charts for just a few countries to help seeing the trends for specific countries.

2020-03-20_16-55-53

This chart shows Italy’s trajectory because it is the country with the highest number of confirmed cases. S Korea is also included to show a country that has been able to stabilize their number of confirmed cases.

The 3/21/20 data shows that the US trajectory has now passed where Italy was on the 18th day, indicating that we are currently on a path comparable to Italy’s.

COVID19_Trajectory_3_21_20

Climate Change, Flood Risk & Mortgages

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Philadelphia’s Flooding Challenge

PHL_flood_challenge