2021 Atlantic Hurricane Season

The 2021 Atlantic hurricane season has officially ended. Although all of the official names were used, four of those storms were short-lived or extratropical, and, in my humble opinion, should not have been named (Ana, Odette, Teresa, Wanda). There were officially 21 named storms, but there were really just 17. There were 7 hurricanes of which 4 were major. One of those, Ida, made landfall in the U.S. None of the storms exceeded Category 4. Ida and Sam were the strongest this year at Category 4. The Accumulated Cyclone Energy (ACE) for the season was lower than 2020.

Summary of Autumn 2021

Meteorological Autumn is officially over. Here is a brief summary of September 1-November 30 in Stormstown, PA:  

Number of days Max T >= 90 F: 0

Number of Days Max T <= 32 F: 0

Number of Days Min T <= 32 F: 20

Max T: 85.7 F – September 18, 2021

Min T: 20.2 F – November 24, 2021

Sep Dep from Normal: 1.4 F

Oct Dep from Normal: 6.4 F

Nov Dep from Normal: -2.6 F

Heating Degree Days: 1146

Cooling Degree Days: 120

Sep Precip: 6.82″, 2.84″ above normal

Oct Precip: 3.40″, 0.06″ above normal

Nov Precip: 1.45″, 1.79″ below normal

November 2021 Weather Summary

November was 2.6 deg F below normal for temperature. The high for the month was 69.0 deg. F, recorded on November 9. The low for the month was 20.2 deg F, recorded on November 24. There were 20 days at or below 32 F and 0 days when the maximum temperature was at or below 32 F. There were 774 heating degree days and 1 cooling degree day.

November was a below-normal month for precipitation with 1.45 inches of rainfall recorded, which was 1.79 inches below normal. The maximum rainfall in a single day was 0.96 inches recorded on November 12. There were 9 days of rain >.01 in, 2 >.10 in and 0 > 1 in. There was also 1.2 inches of snow this month.

High wind speed of 37 mph on November 26.

November 2021 Data

October 2021 Weather Summary

Foliage on Bald Eagle Mountain in Halfmoon Twp. – November 1, 2021

October was 6.4 deg F above normal for temperature. The high for the month was 79.4 deg. F recorded on October 15. The low for the month was 36.2 deg F, recorded on Oct 24. There were 0 days at or above 90 deg F and 0 days at or below 32 deg F. There were 252 heating degree days and 28 cooling degree days.

October was above average for precipitation with 3.40 inches of rainfall recorded, which was 0.06 inches above normal. The maximum rainfall in a single day was 1.23 inches recorded on October 29. There were 15 days of rain >.01 in, 8 >.10 in and 1 > 1 inch.

High wind speed of 31 mph on October 26.

October 2021 Data

September 2021 Weather Summary

September was 1.4 deg F above normal for temperature. The high for the month was 85.7 deg. F recorded on September 18. The low for the month was 42.1 deg F, recorded on September 30. There were 0 days at or above 90 deg F and 0 days at or below 32 deg F. There were 120 heating degree days and 91 cooling degree days.

September had 6.82 inches of rainfall recorded, which was 2.84 inches above normal. The maximum rainfall in a single day was 1.96 inches recorded on September 1. There were 8 days of rain >.01 in, 8 >.10 in and 3 > 1 in.

High wind speed of 28 mph on September 28.

September 2021 Data

Summary 0f Summer 2021

Meteorological Summer is officially over. Here is a brief summary of June 1-August 31 in Stormstown, PA:

Number of days Max T >= 90 F: 7

Max T: 92.3 F – August 12, 2021

Min T: 41.4 F – June 23, 2021

Jun Dep from Normal: 1.0

Jul Dep from Normal: -0.4 F

Aug Dep from Normal: 1.8 F

Heating Degree Days: 117

Cooling Degree Days: 657

Jun Precip: 6.42″, 2.56″ above normal  

Jul Precip: 3.08″, 0.38″ below normal  

Aug Precip: 5.02″, 0.88″ above normal  

The main event of the summer were the passage of the remnants of Tropical Storm Fred, on August 18, which yielded 2.26 inches of rainfall.

August 2021 Weather Summary

August was 1.8 deg F above normal for temperature. The high for the month was 92.3 deg. F recorded on August 12. The low for the month was 48.8 deg F, recorded on August 3. There were 4 days at or above 90 deg F. There were 22 heating degree days and 245 cooling degree days.

August was an above normal month for precipitation with 5.02 inches of rainfall recorded, which was 0.88 inches above normal. The maximum rainfall in a single day was 2.26 inches recorded on August 18 (the remnants of Tropical Storm Fred). There were 15 days of rain >.01 in, 9 >.10 in and 1 >1 in.

High wind speed of 37 mph on August 12

August 2021 Data

July 2021 Weather Summary

July was 0.4 deg F below normal for temperature. The high for the month was 91.8 deg. F recorded on July 7. The low for the month was 49.6 deg F, recorded on July 31. There was a single day at or above 90 deg F! There were 32 heating degree days and 224 cooling degree days.

July was a below normal month for precipitation with 3.08 inches of rainfall recorded, which was 0.38 inches below normal. The maximum rainfall in a single day was 0.69 inches recorded on July 7. There were 12 days of rain >.01 in, 7 >.10 in and 0 >1 in.

High wind speed of 43 mph on July 7.

July 2021 Data

June 2021 Weather Summary

June was 1.0 deg F above normal for temperature. The high for the month was 92 deg. F recorded on June 29. The low for the month was 41 deg F, recorded on June 23. There were 63 heating degree days and 188 cooling degree days.

June was an above normal month for precipitation with 6.42 inches of rainfall recorded, which was 2.56 inches above normal. The maximum rainfall in a single day was 1.65 inches recorded on June 13. There were 13 days of rain >.01 in, 10 >.10 in and 2 >1 in.

High wind speed of 44 mph on June 21. The high winds caused tree damage in the area.

Damaged Trees Blocking PA 550 near Patton/Halfmoon Township Line
June 21, 2021 – Photo by George Riley

June 2021 Data

Here is the latest drought summary for Pennsylvania:

May 2021 Weather Summery

May was 1.3 deg F below normal for temperature. The high for the month was 87.7 F, recorded on May 21. The low for the month was 32.4 deg F, recorded on May 13. There were 0 days at or below 32 F. There were 297 heating degree days and 74 cooling degree days.

May was an a-normal month for precipitation with 3.67 inches of rainfall recorded, which was 0.44 inches above normal. The maximum rainfall in a single day was 1.15 inches recorded on May 9. There were 10 days of rain >.01 in, 9 >.10 in and 1 > 1 in.

The high wind speed for the month was 33 mph on May 26.

May 2021 Data

The developing drought in northwestern Pennsylvania has eased. Our region continues to be below normal for rainfall for the year.