***Corrected Winter 2010*** LOCAL CLIMATOLOGICAL DATA HISTORY OF THE AMUNDSEN SCOTT SOUTH POLE STATION YEAR 1964 MONTH DECEMBER ....... ALL TEMPERATURES MINUS C .............. DAY TEMPERATURE C. PCPN AVG WND FASTEST SUN SKY STN WX MAX MIN AVG SPEED MILE SHINE COVER PRESS DIR MPH SPD DIR HRS 01 28.9 30.6 29.8 T 050 14.7 20 030 24.0 3 686.7 02 30.3 31.1 30.6 0 020 14.1 20 020 24.0 3 684.3 03 29.2 31.1 30.0 0 020 12.5 18 020 24.0 6 686.5 04 28.9 30.0 29.3 0 070 7.7 13 090 24.0 1 689.5 05 28.3 29.4 28.9 0 070 10.7 15 090 24.0 0 686.2 06 28.3 31.7 30.2 T 360 9.6 16 360 22.2 6 686.5 07 30.9 31.7 31.2 T 360 8.3 13 360 24.0 3 688.2 08 30.3 32.4 30.9 T 360 3.2 9 340 24.0 6 689.2 09 30.0 32.2 31.1 T 140 3.1 7 150 24.0 2 688.6 10 27.8 32.2 30.3 0 160 5.7 10 120 23.2 4 687.5 11 27.0 29.4 28.2 0 070 10.2 13 110 24.0 0 685.7 12 24.8 27.8 25.9 0 070 11.8 17 030 23.5 4 682.8 13 25.9 31.1 28.4 T 020 8.8 16 350 17.2 6 687.5 14 28.9 31.1 30.3 0 050 7.1 12 040 23.3 2 688.8 15 29.2 30.6 29.8 T 020 8.5 14 020 23.4 4 691.1 16 28.1 30.6 29.3 T 050 5.8 9 050 24.0 1 691.6 17 26.1 29.4 27.2 0 090 10.0 15 070 23.0 1 689.7 18 25.9 27.2 26.4 T 050 9.9 15 080 23.5 2 688.0 19 23.9 27.2 25.3 T 090 8.8 15 020 18.2 4 689.0 20 24.4 26.1 25.5 0 070 7.6 13 030 24.0 3 687.5 21 22.9 27.2 24.8 T 340 10.5 24 330 23.3 6 685.4 22 24.8 28.3 26.9 T 050 4.2 14 350 22.4 3 684.4 23 25.6 28.9 27.7 T 050 2.7 8 330 23.3 6 687.0 24 25.3 28.9 27.4 T 050 2.7 8 330 23.4 7 689.7 25 25.6 30.0 29.3 0 090 8.6 13 140 24.0 0 690.0 26 26.4 29.4 27.2 0 020 10.8 16 030 24.0 1 693.1 27 25.3 27.2 26.1 0 020 7.7 15 010 8.1 6 698.6 28 25.0 27.8 26.4 0 070 6.6 12 040 14.0 3 698.4 29 24.8 26.7 25.7 T 050 9.0 14 040 24.0 1 697.2 30 23.1 25.6 24.2 T 070 10.8 17 360 15.2 4 694.0 31 23.1 26.7 25.4 T 360 6.9 18 320 7.1 7 691.4 AVG 26.7 29.3 28.1 050 8.3 24 330 21.6 3 689.2 21st AVG MONTHLY -28.1 PCPN TRACE NR DAYS CLEAR 11 HIGHEST -22.9 ON 21st SUNSHINE 670.3/ 90% PARTLY CLOUDY 18 LOWEST -32.4 ON 8th CLOUDY 02 HIGH PRESSURE 699.6 ON 27th LOW PRESSURE 682.0 ON 12th NET CHANGE IN SNOWSTAKE FIELD: +0.60 inches 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 Sky Cover changed to Octas. Station Pressure converted from inches of Hg to millibars. All wind and pressure data taken from original LCD unless otherwise indicated. Prevailing wind direction converted from cardinal direction to degrees. Changed Extremes: From To Max T Min T -32.4 -33.1 Changed Monthly Averages: (All temps are Minus C) From To From To From To Max T 26.9 26.7 Avg Wnd Spd Avg Press Min T Max Press Fastest Wnd MPH Avg T 28.2 28.1 Min Press Changes to Daily Data: Max Temp Day 2 3 7 8 11 12 13 15 16 From: 30.6 29.4 31.1 30.6 27.2 25.0 26.1 29.4 28.3 To: 30.3 29.2 30.9 30.3 27.0 24.8 25.9 29.2 28.1 Day 18 22 24 26 27 29 30 31 From: 26.1 25.0 25.6 26.7 25.6 25.0 23.3 23.3 To: 25.9 24.8 25.3 26.4 25.3 24.8 23.1 23.1 Min Temp No Daily Changes Avg Temp Day 1 3 4 6 7 8 10 11 12 13 14 15 16 17 From: 30.0 30.6 29.4 30.0 31.7 31.74 30.0 28.3 26.7 28.9 30.0 30.0 29.4 27.8 To: 29.8 30.0 29.3 30.2 31.2 30.9 30.3 28.2 25.9 28.4 30.3 29.8 29.3 27.2 Day 18 19 20 21 22 23 24 25 26 27 28 29 30 31 From: 26.7 25.6 25.6 25.0 26.7 27.2 27.2 27.8 28.3 26.7 26.7 26.1 24.4 25.0 To: 26.4 25.3 25.5 24.8 26.9 27.7 27.4 29.3 27.2 26.1 26.4 25.7 24.2 25.4 Number of NCDC observations per day: 8