February was 1.2 deg F below normal for temperature. The high for the month was 58.1 deg. F, recorded on February 24. The low for the month was 2.8 deg F, recorded on February 8. There were 14 days when the maximum was at or below 32 F and 26 days when the minimum temperature was at or below 32 F. There were 1031 heating degree days and 0 cooling degree days.
Due to the ice and snow accumulation, which fouled the electronic rain gauge, precipitation data was collected from a nearby CoCoRaHS (PA-CN-18) station. February was an above-normal month for precipitation with 2.52 inches of rainfall recorded, which was 0.25 inches above normal. The maximum rainfall in a single day was 0.68 inches recorded on February 16. There were 18 days of rain >.01 in, 9 >.10 in and 0 > 1 in.
There were 28.3 inches of snow for the month, with a maximum daily total of 6.4 inches on February 1. The 3-day total recorded on February 1-3 was 14.9 inches.
Overall, the year’s temperatures were above normal. The annual mean of 52.1 F was 2.0 F above normal. Of course the main event of 2020 was the drought. The annual precipitation of 36.46 inches was 4.24 inches below normal. Most of Centre County was in a severe drought in September.
However, at the end of the year, the drought in Centre County was essentially over.
2020 Weather Data
January was mild with a monthly mean of 33.2 F, which was 5.1 F above normal, with a high of 64 F and a low for the month of 9 F. Precipitation was 1.07 inches below normal with 2.04 inches of liquid precipitation.
The mild winter continued into February which was 5.5 F above normal. The high was 62 F and the low was 6 F, which was also the low for the year. Precipitation was 0.60 inches above normal at 2.87 inches.
March temperatures were also mild at 6.0 F above normal with a high of 73 F and a low of 22 F. Precipitation was 1.71 inches above normal with 5.26 inches of liquid precipitation. The high wind speed for the month and year was 47 mph.
Temperatures were 3.1 F below normal in April. The high was 70 F and the low was 24 F. Rainfall was 1.67 inches above normal at 5.06 inches.
Spring temperatures continued to be cooler than normal in spite of a mild March. May was 2 F below normal with a high of 86 F and a low of 27 F. Precipitation was 1.72 inches which was 1.51 inches below normal. This was perhaps the harbinger of the future drought conditions. The last day of temperatures below freezing was May 13.
Temperatures for the month were near normal. The high was 88 F and the low was 41 F. Precipitation was 0.94 inches above normal with 4.80 inches of rainfall.
July was the warmest month of the year. The temperatures were 3 F above normal. The high for the month and year was 95 F and the low was 55 F. Rainfall was 2.27 inches below normal with 1.19 inches of precipitation.
July also gave us outstanding views of Comet Neowise.
The month’s temperatures were 2 F above normal. The high was 93 F and the low was 47 F. Precipitation was 2.66 inches below normal at 3.42 inches. The drought was getting severe.
Temperatures were near normal this month. The high was 86 F and the low was 32 F. Drought conditions continued with 2.61 inches of rainfall. This was 1.37 inches below normal. The first freeze of the season was September 20.
October was warmer at 1.0 F above normal. The high was 81 F and the low was 28 F. Rainfall was below normal at 2.96 inches, which was 0.38 inches below normal.
Temperatures were mild in November and were 3.7 F above normal. The high was 76 F and the low was 22 F. Precipitation was 3.44 inches, 0.20 inches above normal.
December was the coldest month of 2020. The mean temperature was 32.6 F. The temperatures were 0.8 F above normal. The high was 55 F and the low was 11 F. Precipitation was 0.10 inches below normal at 1.88 inches.
The following was recently posted by the State College National Weather Service Office. The chart was produced by The Mid-Atlantic River Forecast Center (MARFC) which is co-located with The State College National Weather Service Forecast Office.
A neighbor asked to explain why Centre County was depicted as being a standout from the other counties.
For the 60-day period (6/13/2020 through 8/11/2020) Centre County’s areal precipitation was 3.2 inches which was 4.8 inches below normal for the period. A normal amount would have been 8 inches. This works out to be 60% below normal which is above the 50% threshold for the red portion of the scale. By comparison, here are the values for the surrounding counties: Blair 47%, Cambria 29%, Clearfield 47%, Clinton 41%, Huntington 43%, Mifflin 47%, Snyder 44%.
The River Forecast Centers use a distance weighting technique to calculate the areal precipitation. A grid of point estimates is made based on a distance weighting scheme. Each observed point value is given a unique weight for each grid point based on the distance from the grid point in question. The grid point precipitation value is calculated based on the sum of the individual station weight multiplied by observed station value. Once the grid points have all been estimated they are summed and the sum is divided by the number of grid points to obtain the areal average precipitation.
Here is a map of standardized precipitation index (SPI).
There is a bullseye of values between -2 and -1.5 over our region.
The SPI is a widely used index to characterize meteorological drought on a range of timescales. On short timescales, the SPI is closely related to soil moisture, while at longer timescales, the SPI can be related to groundwater and reservoir storage. The SPI uses precipitation only, and can characterize drought or abnormal wetness at different time scales which correspond with the time availability of different water resources (e.g. soil moisture, snowpack, groundwater, river discharge and reservoir storage).
As the above map indicates, southwestern Centre County is experiencing a moderate drought. The criteria for drought classification appears below.
July was lower than normal for precipitation for six counties in central Pennsylvania.
The above graph shows all of the precipitation data I have collected since establishing my weather station in December 2015 until now. This past July was as dry as July 2016. However, August 2020 is on track to be the driest in 5 years.
June was 0.1 deg F above normal for temperature. The high for the month was 88 deg. F recorded on June 9. The low for the month was 41 deg F, recorded on June 1. There were 71 heating degree days and 168 cooling degree days.
June was an above normal month for precipitation with 4.80 inches of rainfall recorded, which was 0.94 inches above normal. The maximum rainfall in a single day was 1.56 inches recorded on June 4. There were 8 days of rain >.01 in, 7 >.10 in and 1 >1 in.
April was 3.1 deg F below normal for temperature. The high for the month was 69.8 F, recorded on April 8. The low for the month was 24.2 deg F, recorded on April 17. There were 7 days at or below 32 F. There were 557 heating degree days and 1 cooling degree day.
April was an above-normal month for precipitation with 5.06 inches of rainfall recorded, which was 1.67 inches above normal. The maximum rainfall in a single day was 1.34 inches recorded on April 30. There were 15 days of rain >.01 in, 10 >.10 in and 1 > 1 in.
It snowed two inches on April 18, which had all but melted by the end of the following day.
High wind speed of 42 mph on April 10.
One kind reader remarked that this April seemed to be windier than usual. Here are the wind data for April during the past 5 years (2016-2020):
Wind Run (mi)
Wind run is the total distance of the traveled wind over a period of time.
By any measure, April 2018 was the windiest during the past 5 years.
January was 5.1 deg F above normal for temperature. The high for the month was 64.2 deg. F, recorded on January 11. The low for the month was 9.1 deg F, recorded on January 21. There were 23 days at or below 32 F and 4 days when the maximum temperature was at or below 32 F. There were 986 heating degree days and 0 cooling degree days.
January was a below-normal month for precipitation with 2.04 inches of rainfall recorded, which was 1.07 inches below normal. The maximum rainfall in a single day was 0.55 inches recorded on January 25. There were 14 days of rain >.01 in, 6 >.10 in and 0 > 1 in.
A severe thunderstorm occurred at approximately 4:15 PM EST in Stormstown, PA. Two small trees blocked part of PA 550, and a large tree fell across the highway, downing utility lines, near Brothers Pizza.
Photo Courtesy Of Tom Majewski
The highway, further north, was also blocked by Sawmill Road. More wind damage occurred in Port Matilda and in State College on N. Atherton Street, Blue Course Drive, W. Beaver Avenue, and Westerly Parkway.
The official Local Storm Report (LSRCTP):
0413 PM TSTM WND DMG STORMSTOWN 40.79N 78.01W
08/18/2019 CENTRE PA 911 CALL CENTER
TREE AND WIRES DOWN
May was 2.6 deg F above normal for temperature. The high for the month was 83.6 deg. F recorded on May 19. The low for the month was 39.6 deg F, recorded on May 22. There were 173 heating degree days and 72 cooling degree days.
May was an above normal month for precipitation with 7.15 inches of rainfall recorded, which was 3.92 inches above normal. The maximum rainfall in a single day was 1.50 inches recorded on May 29. There were 18 days of rain >.01 in, 12 >.10 in and 3 >1 in.