***Corrected Winter 2011*** LOCAL CLIMATOLOGICAL DATA HISTORY OF THE AMUNDSEN SCOTT SOUTH POLE STATION YEAR 1975 MONTH MARCH .... ALL TEMPERATURES MINUS C.... DAY TEMPERATURE C PCPN AVG WIND FASTEST SUN SKY STN WX MAX MIN AVG SPEED MILE SHINE COVER PRESS DIR MPH SPD DIR HRS 1 53.6 56.4 54.7 0 110 8.6 12 090 24.0 0 682.5 2 40.9 56.7 49.6 0 030 14.4 21 090 23.2 5 682.7 3 40.0 53.9 41.8 0 020 17.5 23 020 4.3 8 685.9 IF,BS 4 40.6 52.8 47.0 T 010 11.2 22 020 18.8 3 685.3 IC,IF,BS 5 43.1 49.4 44.7 0 360 16.4 19 360 7.2 8 686.3 IF 6 42.8 47.8 47.3 0 030 16.9 21 360 0.7 8 685.3 IF,BS 7 44.2 48.9 46.5 0 030 16.9 21 020 0.0 8 681.5 IF 8 43.9 48.3 45.6 0 030 10.4 21 020 1.3 8 674.2 IF 9 42.8 58.1 52.8 0 040 6.6 14 020 4.5 3 675.4 IF 10 52.2 60.6 59.4 0 070 5.8 8 040 24.0 0 680.9 11 59.4 62.2 60.7 0 080 9.7 10 090 24.0 0 681.8 12 57.8 61.7 58.5 0 080 8.3 14 090 24.0 0 682.0 13 57.2 60.6 59.0 0 080 8.3 12 090 24.0 1 679.1 14 51.4 62.2 54.9 0 040 13.5 15 080 24.0 3 676.7 15 50.3 58.9 50.9 0 040 16.3 22 010 18.5 6 677.6 IF 16 46.4 52.8 49.0 0 360 14.7 21 050 7.2 5 673.0 IF 17 38.6 51.7 43.9 0 020 21.9 25 360 0.0 7 681.0 IF,BS 18 38.9 52.0 46.6 0 340 13.5 28 320 0.0 4 685.8 BS 19 44.2 53.3 49.2 0 060 12.6 17 060 0.0 1 676.9 20 43.9 55.3 48.9 0 220 14.4 21 360 0.0 1 674.1 BS,IF 21 47.2 63.6 61.1 0 090 9.2 15 360 0.0 0 679.2 22 61.1 66.1 63.7 0 080 8.1 12 090 0.0 0 688.4 23 40.3 65.6 50.8 0 050 18.5 24 070 0.0 3 690.8 24 28.7 58.3 32.7 0 020 23.0 28 020 0.0 8 700.9 BS,IF 25 26.7 48.1 40.9 0 080 16.4 25 060 0.0 3 694.9 BS,IF 26 40.0 54.7 50.7 0 060 12.4 21 090 0.0 1 689.7 BS 27 47.8 60.0 56.4 0 070 12.4 16 090 0.0 1 689.9 28 54.4 60.3 58.8 0 110 6.7 14 090 0.0 2 688.8 29 54.2 62.2 59.9 0 120 1.7 9 130 0.0 3 690.4 30 51.1 62.2 56.7 0 110 5.5 8 090 0.0 3 687.9 31 53.9 59.4 57.8 0 140 8.6 10 090 0.0 5 677.9 AVG 46.4 56.9 51.6 T 080 12.3 28 020 10.3 3 683.4 18th,24th AVG MONTHLY -51.6 PCPN TRACE NR DAYS CLEAR 12 HIGHEST -26.7 ON 25th SUNSHINE 229.7/ 43% PARTLY CLOUDY 12 LOWEST -66.1 ON 22nd CLOUDY 07 HIGH PRESSURE 703.0 ON 25th LOW PRESSURE 671.7 ON 9th NET CHANGE IN SNOWSTAKE FIELD: +1.80 inches Sunset occurred at 0831 on day 23. Sunset based on US Naval Observatory time. The following data was changed from the old LCD: All Average Temps recalculated for 24hrs instead of Max+Min/2. Individual Data changed to reflect extremes from LCD and NCDC Data. All Average Sky Cover changed to reflect data from 00Z through 00Z daily. All Sky Cover changed to Octas. Peak wind speed, peak wind direction, precipitation, sunshine amount, and present wx reported in NZST. Insufficient data to convert these values to UTC. All temperature, wind, and pressure data taken from NCDC data. LCD data originally reported in NZST. Changed Monthly Averages: (All temps are Minus C) From To From To From To Max T 48.3 46.4 Avg Wnd Spd Avg Press 683.5 683.4 Min T 55.9 56.9 Max Press Fastest Wnd MPH Avg T 52.1 51.6 Min Press Changes to Daily Data: Max Temp Day 1 2 5 7 8 14 15 16 17 19 23 24 29 From: 53.9 53.9 43.3 46.7 44.4 55.0 50.6 47.8 46.1 46.7 57.8 34.4 58.3 To: 53.6 40.9 43.1 44.2 43.9 51.4 50.3 46.4 38.6 44.2 40.3 28.7 54.2 Min Temp Day 1 9 18 20 21 25 26 28 From: 55.6 52.8 47.2 52.8 61.1 40.6 49.4 59.4 To: 56.4 58.1 52.0 55.3 63.6 48.1 54.7 60.3 Avg Temp Day 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 From: 55.3 46.9 46.7 46.4 45.3 47.8 46.4 47.8 56.4 60.8 59.7 58.9 58.6 54.7 50.3 To: 49.6 41.8 47.0 44.7 47.3 46.5 45.6 52.8 59.4 60.7 58.5 59.0 54.9 50.9 49.0 Day 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 From: 48.9 43.1 50.0 48.3 54.2 63.6 61.7 46.4 33.6 44.7 53.9 56.9 60.3 56.7 56.7 To: 43.9 46.6 49.2 48.9 61.1 63.7 50.8 32.7 40.9 50.7 56.4 58.8 59.9 56.7 57.8 Number of NCDC observations per day: 4