Summary of Spring 2018

Meteorological Spring is officially over. Here is a brief summary of Mar 1-May 31 in Stormstown, PA:

Number of days Max T <=32 F: 1
Number of Days Min T <= 32 F: 40
Number of Days Min T <= 0 F: 0
Max T: 88.1 – May 26, 2018
Min T: 17.0 – March 11, 2018
Mar Dep from Normal: -3.0
Apr Dep from Normal: -5.4
May Dep from Normal: 6.1
Heating Degree Days: 758
Cooling Degree Days: 141
Mar Precip: 2.05″, 1.5″ below normal
Apr Precip: 3.57″, 0.18″ above normal
May Precip: 3.85″, 0.62″ above normal

Measurement of the pH of Rain

Today, with precipitation in the forecast, I set up my mini-laboratory to measure the pH of the local rainfall in Stormstown, PA. First, I installed a standard rain gauge to collect rainwater.

pH-1

I calibrated my pH meter, prior to taking any actual measurements, using standard reagents of pH of 4.0 and 6.86. I used a pH 7.0 reagent to verify.

pH-2

After calibration, I waited for some rainfall and then collected my sample.

P1030560

It had rained 0.20 inches over the past two days.

P1030561

This was about 400 ml of liquid.

P1030564

I measured the pH to be about 5.15, which is in the normal range for rainfall but still acidic. It is not considered to be acid rain.

pH Scale

April Snow

Easter has come and gone. However, I got up this morning and saw this:

P1030536

The depth of the snow was 6 1/2 inches. Due to the insolation of nearly 1000 W/m**2, the surface air temperature rose to 45 F, and the snow rapidly melted. It was just about gone before sunset, with just a few piles remaining. There is still a chance of snow Wednesday, Thursday and Sunday.

Summary of Winter 2017-2018

Meteorological Winter is officially over. Here is a brief summary of Dec 1-Feb 28 in Stormstown, PA:

Number of days Max T <=32 F: 29
Number of Days Min T <= 32 F: 71
Number of Days Min T <= 0 F: 3
Max T: 75.2 – February 12, 2018
Min T: -5.0 – January 11, 2018
Dec Dep from Normal: -3.3
Jan Dep from Normal: -1.9
Feb Dep from Normal: 6.1
Heating Degree Days: 3170
Cooling Degree Days: 2
Dec Precip: 0.92″, 2.21″ below normal
Jan Precip: 2.15″, 0.96″ below normal
Feb Precip: 5.60″, 3.33″ above normal