Monthly Archives: February 2015

January 2015 – Summary

The topsy turvy weather continued with this being the windiest and coldest January on record here at Askernish.

January will be yet another month remembered for the wind. The month started with fresh to strong winds but then a series of 3 deep depressions triggered by yet another explosive cyclogenesis (weather bomb), coupled with an exceptionally strong jet stream, influenced our weather from the 8th onwards. While we escaped the more severe winds that were experienced only a few miles further north, they peaked here at 76 mph early on the 9th, a record high for January, and continued until the 15th , during which time gusts of 50 – 62 mph occurred regularly. During this period, there were 3 gale days, another record for January. Winds eased from the 16th onwards but were still fresh to strong, gusting to 51 mph on the 27th and 28th . The total wind run for the month was 12,712 miles with an average speed of 17.1 mph, both record highs for the month of January.

Temperatures struggled during the month, especially with the strong winds drawing cold air down from the north throughout the month, resulting in the coldest January to be recorded here with a mean (1 minute) temperature of 5.5°C . A record low temperature for January of -3.3°C occurred on the 18th while there were also record lows for Wind Chill (-7.4°C) on the 16th, Apparent Temperature (-11.3°C) on 15th and Dew Point (-5.1°C) on 19th. Contrary to this, a record high temperature for January of 10.8°C occurred on the 9th during a relatively calm period when record high Heat index (10.8°C), Apparent Temperature (10.9°C) and Dew Point (10.3°C) also occurred.

Rainfall during the month was above average at 157.4 mm which is 39.0 mm above the 10 year average 2001-10 and 26.6 mm above the 5 year average 2011-15. There were 30 rain days during the month, another record for the month of January. Because of the low temperatures there was 1 day with snow lying and 5 days with snow falling, the latter being yet another record for the month of January.

Other measurements of note were the highest hourly rain rate of 6.6 mm during the height of the storms on the 9th, a low humidity of 50% on the 13th and a low pressure of 947.68 mb on the 15th, all records for the month of January.

Statistical Summary

Temperature (°C):
Mean (1 minute)              5.5                       – record low for the month of January
Mean (min+max)             5.2                       – record low for the month of January
Mean Minimum                2.7                        – record low for the month of January
Mean Maximum               7.7
Minimum                          -3.3       18th         – record low for the month of January
Maximum                        10.8         9th         – record high for the month of January
Highest Minimum            7.2        4th
Lowest Maximum            4.2       18th
Air frosts      3

Rainfall (mm):
Total for month      157.4
Wettest day               18.0         20th
High rain rate          62.2            8th
Rain days                  30                      –  highest number recorded in January
Dry days 1
Days >= 0.2mm  –   30         – highest number recorded in January
Days >= 2.0mm  –   23         – highest number recorded in January
Days>= 20.0mm –    0

Wind (mph):
Highest Gust      76.0     8th      – record high for the month of January
Average Speed    17.1                 – record high for the month of January
Wind Run     12712.0 miles      – record high for the month of January
Gale days        3                          – highest number recorded in January

Pressure (mb):
Maximum  1027.26    3rd
Minimum    947.68   14th    – record low for the month of January

Days with snow falling  5    – highest number recorded in January
Days with snow lying at 0900 1

Total hours of sunshine 31.7

Number of sunshine days 20