Weather Summary - 2012

2 January 2013

SOUTH POLE 2012 WEATHER SUMMARY
Amundsen-Scott South Pole Station, Antarctica

Temperature:
Average temp... -49.4°C / -56.9°F
Maximum temp... -20.9°C /-5.6°F on January 10th
Minimum temp... -76.0°C / -104.8°F on July 15th


Wind:
Average wind speed.......... 11.3 mph or 9.8 knots
Prevailing wind direction... Grid Northeast
Maximum wind speed.......... 38 mph or 33 knots on February 20th, and March 8th and 23rd
Maximum wind direction...... Grid Northeast
Average vectored wind....... 056 degrees at 7.4 knots


Station Pressure:
Average pressure... 680.5 mb
Highest pressure... 704.0 mb on June 29th
Lowest pressure.... 659.9 mb on July 19th


Physio-altitude:
Average physio-alt = 10609 ft/ 3234 m
Highest physio-alt = 11396 ft/ 3474 m on July 19
Lowest physio-alt=9736 ft/ 2968 m on June 29


Sky Cover:
Average cloud cover (8ths)... 4
Days clear................... 109
Days partly cloudy........... 200
Days cloudy.................. 57


Sunshine:
Sunset occurred at 0746UTC on 22 March.
Sunset was obscured and is based on US Naval Observatory time.
Sunrise occurred at 1137UTC on 20 September.
Sunrise was obscured and is based on US Naval Observatory time.
Average hours per day... 17.4
Percent of possible..... 73


Snowfall:
Total net change at snowstake field... +9.071 inches


Visibility:
10 days with visibility of 1/4 mile or less.


Balloon flight data:
Number of soundings for the year..... 539
Average height of soundings.......... 46.4 mb, or 22659 meters
Highest sounding.....................2.9 mb, or 40545 meterson February 13/00Z flight



**RECORDS**

January:
- 14th: The peak wind speed of 28 kts/32 mph broke the previous record of 26 kts/30 mph set in 2007.
The 21 partly cloudy days for the month of January tied the previous maximum number of partly cloudy days set in 1971.
The average pressure of 680.2 mb/20.086 in. Hg broke the previous minimum average pressure of 682.3 mb/20.148 in. Hg for the month of January set in 2000.

February:
February 4th: The peak wind speed of 22 kts/25 mph tied the previous record set in 2004.
February 8th: The peak wind speed of 27 kts/31 mph broke the previous record of 21 kts/24 mph set in 1989.
February 20th: The peak wind speed of 33 kts/38 mph broke the previous record of 27 kts/31 mph set in 1986.


March:
March 8th: The temperature of -32.3°C/-26.1°F broke the previous maximum temperature record of -33.9°C/-29.0°F set in 1965.
March 8th: The peak wind speed of 33 kts/38 mph broke the previous record of 29 kts/33 mph set in 1965.
March 19th: The peak wind speed of 31 kts/36 mph broke the previous record of 26 kts/30 mph set in 2003.
March 20th: The temperature of -35.3°C/-31.5°F broke the previous maximum temperature record of -39.2°C/-38.6°F set in 1974.
March 20th: The peak wind speed of 28 kts/32 mph broke the previous record of 26 kts/30 mph set in 1980.
March 21st: The temperature of -35.8°C/-32.4°F broke the previous maximum temperature record of -35.9°C/-32.6°F set in 2008.
March 22nd: The peak wind speed of 26 kts/30 mph broke the previous record of 25 kts/29 mph set in 1962.
March 23rd: The peak wind speed of 33 kts/38 mph broke the previous record of 28 kts/32 mph set in 2010.
March 24th: The peak wind speed of 32 kts/37 mph broke the previous record of 26 kts/30 mph set in 1995.
The net change of +2.565 inches at the snowstake field broke the previous March record of +2.400 inches set in 1982.


April:
April 6th: The temperature of -73.4°C/-100.1°F broke the previous minimum temperature record of -71.7°C/-97.1°F set in 1982.
April 6th: The temperature of -73.4°C/-100.1°F broke the record for the earliest recording of -100.0°F at South Pole. The previous record of -75.2°C/-103.4°F was set on April 7, 1982.
April 25th: The peak wind speed of 29 kts/33 mph broke the previous record of 27 kts/31 mph set in 1992.


May:
No records were tied or broken during the month.


June:
June 4th: The peak wind speed of 27 kts/31 mph tied the previous record set in 1994.
June 11th: The temperature of -73.8°C/-100.8°F broke the previous minimum temperature record of -73.3°C/-99.9°F set in 1966.
June 30th: The temperature of -41.3°C/-42.3°F broke the previous maximum temperature record of -44.3°C/-47.7°F set in 2007.
June 30th: The peak wind speed of 31 kts/36 mph broke the previous record of 29 kts/33 mph set in 1978.


July:
No records were tied or broken during the month.


August:
August 5th: The temperature of -75.1°C/-103.2°F broke the previous minimum temperature record of -74.8°C/-102.6°F set in 2001.
August 14th: The temperature of -74.7°C/-102.5°F broke the previous minimum temperature record of -74.5°C/-102.1°F set in 1978.


September:
No records were tied or broken during the month.


October:
No records were tied or broken during the month.


November:
November 14: The peak wind speed of 32 kts/37 mph tied the previous record set in 2009.
November 23: The peak wind speed of 29 kts/33 mph broke the previous record of 28 kts/32 mph set in 1990.


December:
December 7th: The average daily wind speed of 2.8 kts/3.3 mph broke the previous lowest average daily wind speed record of 3.6 kts/4.1 mph set in 1997.
The 18 partly cloudy days for the month of December tied the previous maximum number of partly cloudy days set in 1980.


All-time:
The 200 partly cloudy days for the year 2012 broke the previous maximum number of partly cloudy days of 190 set in 2009.




Comments

Leave a comment
Please enter the code shown into the box below
Code Image - Please contact webmaster if you have problems seeing this image code Load New Code