WEATHER EXTREMES AT THE VK2KRR SITE
As can often be the case, a good radio site can often be faced with extreme weather conditions, especially sites on hill tops. While here, I am not on a hill top, but on the western slope, the hill towers 300 m higher than the house. The weather here gets really bad at times.
I recently acquired a DAVIS Vantage Pro2 weather station to monitor the weather. This was mainly to help with the tropospheric propagation study, but also to assist with warnings and wind directions when some bad weather comes so I can take action to try prevent damage to the radio system.
| 2010 | WIND MAX | TEMP MIN | TEMP MAX | HUM MIN | HUM MAX | DEWP MIN | BARO MIN | BARO MAX | RAIN AMT | INV TEMP | Visual INV |
| JANUARY | 64 Km/h W | 9.0 degC | 47.5 degC | 5 % | 81 % | -12.0 degC | 999.9 | 1015.4 | 1.2 mm | +1.0 degC | 0 |
| FEBRUARY | 68 Km/h N | 18.1 degC | 37.9 degC | 12 % | 93 % | -1.0 degC | 1001.7 | 1022.5 | 63.0 mm | +1.0 degC | 0 |
| MARCH | 58 Km/h NW | 7.0 degC | 32.6 degC | 11 % | 93 % | -7.0 degC | 1003.5 | 1034.1 | 90.0 mm | +1.5 degC | 0 |
| APRIL | NA | NA | NA | NA | NA | NA | NA | NA | 42.0 mm | - | 0 |
| MAY | NA | NA | NA | NA | NA | NA | NA | NA | 73.0 mm | - | 1 |
| JUNE | 74 Km/h NW | -1.2 degC | 18.1 degC | 44 % | 96 % | -2.0 degC | 1007.4 | 1034.1 | 21.0 mm | + 2.5 degC | 1 |
| JULY | 77 Km/h NE | -2.6 degC | 15.8 degC | 46 % | 98 % | -2.0 degC | 1000.0 | 1033.5 | 51.0 mm | + 2.0 degC | 1 |
| AUGUST | 64 Km/h NE | 0.0 degC | 15.5 degC | 37 % | 97 % | -2.0 degC | 994.9 | 1026.8 | 80.0 mm | +2.2 degC | 0 |
| SEPTEMBER | 84 Km/h N | 7.3 degC | 17.7 degC | 44 % | 92 % | +4.0 degC | 998.6 | 1018.7 | 16.8 mm | +1.8 degC | 0 |
| OCTOBER | |||||||||||
| NOVEMBER | |||||||||||
| DECEMBER |
| 2009 | WIND MAX | TEMP MIN | TEMP MAX | HUM MIN | HUM MAX | DEWP MIN | BARO MIN | BARO MAX | RAIN AMT | INV TEMP | Visual INV |
| JANUARY | 69 Km/h NW | 8.0 degC | 49.9 degC | 5 % | 79 % | -10.0 degC | 996.6 | 1017.6 | 6.0 mm | +1.0 degC | 0 |
| FEBRUARY | 66 Km/h N | 8.0 degC | 45.0 degC | 8 % | 79 % | -4.0 degC | 999.6 | 1020.8 | 0.0 mm | +1.0 degC | 0 |
| MARCH | 68 Km/h N | 6.8 degC | 35.9 degC | 14 % | 87 % | -3.0 degC | 1003.5 | 1019.3 | 6.0 mm | +1.5 degC | 0 |
| APRIL | 68 Km/h N | 1.8 degC | 32.5 degC | 19 % | 93 % | -5.0 degC | 996.7 | 1023.9 | 34.0 mm | +3.0 degC | 2 |
| MAY | 72 Km/h N | 1.8 degC | 24.3 degC | 33 % | 97 % | 1.0 degC | 1020.4 | 1030.4 | 15.0 mm | +2.0 degC | 0 |
| JUNE | 74 Km/h N | -1.7 degC | 19.5 degC | 36 % | 94 % | -2.0 degC | 1003.5 | 1028.3 | 65.0 mm | +2.0 degC | 1 |
| JULY | 50 Km/h W | -1.5 degC | 17.0 degC | 45 % | 96 % | -2.0 degC | 1003.1 | 1023.8 | 40.0 mm | +2.0 degC | 0 |
| AUGUST | 82 Km/h NW | -3.0 degC | 22.3 degC | 33 % | 96 % | -5.0 degC | 996.0 | 1027.3 | 40.0 mm | +2.0 degC | 0 |
| SEPTEMBER | 76 Km/h NE | -2.0 degC | 30.6 degC | 9 % | 94 % | -9.0 degC | 987.9 | 1021.8 | 10.0 mm | +2.6 degC | 2 |
| OCTOBER | 74 Km/h SW | 2.7 degC | 37.8 degC | 7 % | 96 % | -9.0 degC | 995.6 | 1026.6 | 15.0 mm | +4.1 degC | 1 |
| NOVEMBER | 56 Km/h W | 8.0 degC | 39.3 degC | 10 % | 80 % | -6.0 degC | 999.5 | 1025.7 | 20.0 mm | +3.6 degC | 0 |
| DECEMBER | 74 Km/h SW | 8.0 degC | 41.2 degC | 5% | 92 % | -16.0 degC | 1001.5 | 1019.7 | 29.0 mm | +2.0 degC | 0 |
| 2008 | WIND MAX | TEMP MIN | TEMP MAX | HUM MIN | HUM MAX | DEWP MIN | BARO MIN | BARO MAX | RAIN AMT | INV TEMP | Visual INV |
| JAN/FEB | 71 Km/h N | 8.4 degC | 45.5 degC | 9 % | 95 % | -9.0 degC | 996.7 | 1021.2 | 81.4 mm | NA | NA |
| MARCH | 64 Km/h SE | 8.1 degC | 44.1 degC | 7 % | 71 % | -9.0 degC | 1005.7 | 1023.7 | 9.0 mm | NA | NA |
| APRIL | 68 Km/h NW | 4.9 degC | 30.0 degC | 17 % | 88 % | -2.0 degC | 1003.8 | 1024.0 | 2.0 mm | +0.5 degC | NA |
| MAY | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| JUNE | 53 Km/h NE | 4.2 degC | 19.6 degC | 34 % | 94 % | +2.0 degC | 1018.5 | 1028.7 | 10.0 mm | NA | NA |
| JULY | 58 Km/h NW | 0.0 degC | 17.5 degC | 39 % | 95 % | -1.0 degC | 1003.3 | 1027.8 | 47.2 mm | NA | NA |
| AUGUST | 64 Km/h W | -1.0 degC | 16.9 degC | 23 % | 94 % | -5.0 degC | 1000.7 | 1028.6 | 10.4 mm | NA | NA |
| SEPTEMBER | 76 Km/h NW | -1.2 degC | 29.2 degC | 14 % | 93 % | -5.0 degC | 999.0 | 1030.4 | 20.4 mm | +2.4 degC | NA |
| OCTOBER | 69 Km/h W | 0.0 degC | 36.4 degC | 11 % | 92 % | -10 degC | 1006.1 | 1025.9 | 7.0 mm | +4.3 degC | 1 |
| NOVEMBER | 69 Km/h SW | 5.0 degC | 33.2 degC | 12 % | 93 % | - 8.0 degC | 991.7 | 1021.1 | 30.0 mm | +2.0 degC | 0 |
| DECEMBER | 68 Km/h N | 8.0 degC | 42.1 degC | 9 % | 94 % | - 7.0 degC | 990.7 | 1015.3 | 50.0 mm | +1.7 degC | 0 |
| 2006 | WIND MAX | TEMP MIN | TEMP MAX | HUM MIN | HUM MAX | DEWP MIN | BARO MIN | BARO MAX | RAIN AMT | INV TEMP |
| JANUARY | 71 Km/h W | 10.9 degC | 46.7 degC | 9 % | 92 % | -7.0 DegC | 1003.0 | 1016.9 | 0.4 mm | +2.8 degC |
| FEBRUARY | 60 Km/h SW | 6.7 degC | 45.3 degC | 8 % | 78 % | -5.0 DegC | 998.1 | 1020.5 | 0.2 mm | +1.5 degC |
| MARCH | 64 Km/h NE | 7.2 degC | 40.2 degC | 10 % | 86 % | -3.0 DegC | 1004.9 | 1025.6 | 0.0 mm | +5.3 degC |
| APRIL | 63 Km/h N | -0.2 degC | 29.9 degC | 14 % | 93 % | -6.0 DegC | 1002.1 | 1023.7 | 27.0 mm | +2.0 degC |
| MAY | 68 Km/h N | -2.0 degC | 25.3 degC | 28 % | 96 % | -4.0 DegC | 1004.0 | 1028.7 | 2.4 mm | +2.5 degC |
| JUNE | 53 Km/h S | -1.5 degC | 22.0 degC | 27 % | 90 % | -5.0 DegC | 1008.1 | 1031.0 | 21.4 mm | +3.1 degC |
| JULY | 71 Km/h NE | -1.0 degC | 19.0 degC | 31 % | 96 % | -3.0 DegC | 1006.9 | 1034.0 | 36.6 mm | +2.9 degC |
| AUGUST | 51 Km/h NE | 0.1 degC | 22.0 degC | 38 % | 92 % | -1.0 DegC | 1014.4 | 1029.7 | 10.8 mm | +3.0 degC |
| SEPTEMBER | 74 Km/h N | 2.3 degC | 28.7 degC | 14% | 90 % | -8.0 DegC | 998.4 | 1035.3 | 20.6 mm | +2.5 degC |
| OCTOBER | 72 Km/h N | 1.5 degC | 40.3 degC | 9% | 81% | -14 degC | 1006.6 | 1031.2 | 01.0 mm | +4.0 degC |
| NOVEMBER | 74 Km/h N | 3.2 degC | 40.5 degC | 9% | 80 % | - 12 degC | 1005.0 | 1032.0 | 20.0 mm | +4.2 degC |
| DECEMBER | 53 Km/h N | 8.0 degC | 41.4 degC | 6 % | 62 % | -13 degC | 1008.6 | 1020.1 | 0.0 mm | +2.0 degC |
| 2005 | WIND MAX | TEMP MIN | TEMP MAX | HUM MIN | HUM MAX | DEWP MIN | BARO MIN | BARO MAX | RAIN AMT | INV TEMP |
| MARCH | 61 Km/h SW | 7.8 degC | 35.6 DegC | 16 % | 100 % | -2.0 DegC | 1011.6 | 1033.0 | 3.6 mm | na |
| APRIL | 69 Km/h SW | 2.1 DegC | 32.2 DegC | 17 % | 100 % | -2.0 DegC | 1010.7 | 1032.2 | 15.2 mm | +3.2 degC |
| MAY | 50 Km/h SW | -0.7 degC | 28.3DegC | 25 % | 93 % | -2.0 degC | 1012.8 | 1029.9 | 4.0 mm | +6.2 degC |
| JUNE | 63 Km/h W | -1.0 degC | 25.5 degC | 27 % | 97 % | -2.0 degC | 996.4 | 1030.2 | 64.8 mm | +3.5 degC |
| JULY | 53 Km/h NE | -0.8 degC | 17.4 degC | 41 % | 99 % | -1.0 degC | 1007.0 | 1038.5 | 32.4 mm | +3.6 degC |
| AUGUST | 77 km/h NE | -0.5 degC | 22.6 degC | 38 % | 99 % | -2.0 degC | 1003.8 | 1033.0 | 41.0 mm | +2.0 degC |
| SEPTEMBER | 68 km/h N | 1.0 degC | 25.9 degC | 38 % | 96 % | -2.0 degC | 998.3 | 1025.7 | 71.8 mm | +2.5 degC |
| OCTOBER | 69 km/h NE | 1.9 degC | 32.0 degC | 28 % | 95 % | 0.0 degC | 995.7 | 1023.4 | 55.8 mm | +4.0 degC |
| NOVEMBER | 63 km/h SW | 4.3 degC | 35.0 degC | 17 % | 91 % | 0.0 degC | 1002.7 | 1023.5 | 7.6 mm | +1.6 degC |
| DECEMBER | 80 km/h W | 6.1 degC | 42.7 degC | 9 % | 92 % | -7.0 degC | 997.9 | 1015.9 | 38.5 mm | + 2.6 degC |
* INV TEMP is Inversion Temperature. This is the maximum positive temperature difference between thermometers on tower at 6 Ft and 50 ft. Meaning the temperature is rising with height by a certain amount over the 44 Ft rise.
* VISUAL INV is noted occurrences of visual inversions. These are inversions bending light waves. They are Fata Morgana or Superior Mirages which are extremely rare occurrences globally.