BWS Daily Climatology Written Summary

BWS Daily Climatology Table One

BWS Daily Climatology Table Two

BWS Daily Climatology Graphs

January 1 2015 to January 30 2015


(Compiled: Saturday, January 31, 2015 17:35)

Written Summary   Table One   Table Two   Graphs  
Notes:
1. Mean daily temperature and pressure are averaged from the standard 24 hourly observations and not as the average of the maximum and minimum values.
2. Precipitation day has = or >0.01". Trace amounts (< 0.01") are not included in data.
3. Departures from the normal are based on the 1971 to 2000 normals where available (with the exception of the Sea Surface Temperature, which is based on the 1985 to 2000 normal).
Notes:
1. Mean humidity is averaged from the standard 24 hourly observations.
2. Weather Notes indicate a specific condition was observed at least once that day.
3. Departures from the normal are based on the 1971 to 2000 normals where available (with the exception of the Sea Surface Temperature, which is based on the 1985 to 2000 normal).
Key:
PN = Precipitation, PC = Partly Cloudy, MC = Mostly Cloudy, OV = Overcast, DZ = Drizzle, SH = Showers, BS = Blowing Spray GR = Hail, FC = Funnel Cloud, HZ = Haze, RA = Rain, BR = Mist, TS = Thunder Storm/Shower
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A mainly fine start with above average temperatures. Brief cold shot and near gale on the 8th; gales on the nights of the 24th and 26th, with deep winter lows passing well north.


Last edited: Saturday, January 31, 2015

New Years Day brought mixed conditions with a couple of showers producing 0.06" of rainfall and 5 hours of sunshine. The high was 71F/22C with a low of 63F/17C. The 2nd saw high pressure in place with 8.5 hours of sunshine. The high was 70F/21C with a low of 65F/18C. Saturday the 3rd remained settled as high pressure persisted across the area. The high was 72F/22C with a low of 65F/18C and 7.5 hours of sunshine. The high then began to weaken on Sunday the 4th. There were 8.7 hours of sunshine with a high of 73F/23C and a low of 68F/20C. A weak cold front passed Bermuda during the evening of the 5th with a line of showers that brought 0.03" of precipitation. 7 hours of sunshine were recorded with a record-tying daily high of 76F/25C and a low of 67F/20C. Patchy light to moderate rain brought 0.20" during the afternoon and evening of the 6th. Overcast skies only allowed for 0.2 hours of sunshine with a high of 70F/21C and a low of 64F/18C. Generally fair and sunny, if rather breezy, weather ensued on the 7th ahead of a cold front, with just a brief shower giving a trace and 9 hours of sunshine. The high was 74F/23C with a low of 68F/20C. The 8th saw a vigorous cold frontal passage, with rain and showers producing 0.44" of precipitation. Strong winds were maintained throughout the day with gale force gusts up to 38 knots. The high was 71F/22C with a low of 55F/13C and no sunshine. The 9th saw high pressure transition the area with a few showers producing 0.16" of rainfall. The high was 65F/19C with a low of 53F/12C and 3.4 hours of sunshine. Frontal passage on the 10th saw a couple showers, with only a trace of rainfall. The high was 72F/22C with a low of 63F/17C and 6.7 hours of sunshine. High pressure built in from the west on the 11th with moderate to strong northeasterly winds, no rain and 6.0 hours of sunshine. The high reached 70F/21C after a low of 66F/19C. The 12th was dominated by high pressure but punctuated by a few showers at times (0.12") which moved north around the eastward exiting high. The day's high was 72F/22C after a low of 66F/19C with 3.5 hours of sunshine. Tuesday the 13th remained fair as a ridge of high pressure continued to retreat to the northeast. The high and low were unseasonably warm at 75F/24C and 70F/21C respectively with 7.3 hours of sunshine. Wednesday the 14th was very changeable with a few showers and light winds to start the day and strong winds with gale force gusts and thunderstorms with a few heavy showers to end the day. The highest mean wind was 30 knots with a maximum gust of 39 knots. The total precipitation was 0.95" with a high of 72F/22C and a low of 64F/18C and 0 hours of sunshine. Thursday the 15th saw a frontal boundary move across the area and stall to our south that brought mostly cloudy skies with 2.7 hours of sunshine and 0.03" of rainfall. The high was 74F/23C with a low of 68F/20C. Friday the 16th saw a post-frontal trough approach from the north that produced cloudy skies with 0.2 hours of sunshine and 0.10" of rainfall. The high was 70F/21C and a low of 63F/17C. Cooler temperatures arrived on the 17th as the high reached 67F/19C with a low of 59F/15C. 0.02" of precipitation was recorded with 5.9 hours of sunshine. As high pressure exited to the northeast, a few light showers passed through the area on the 18th bringing 0.07" of precipitation and 4.0 hours of sunshine. The high was 67F/19C with a low of 56F/13C. Winds were strong throughout Monday the 19th with a fast-moving cold front passing from the west near midday, with a period of frontal gusts to gale-force and 0.28" of rain. The high was 71F/22C with a low of 64F/18C and 4.4 hours of sun. On the 20th, a new high built in from the SW with dry weather, easing winds and 6.8 hours of sun. The high reached 69F/21C with a low of 61F/16C. High pressure maintains fair conditions with light winds through Wednesday the 21st. There was 5.8 hours of sunshine with a high of 71F/22C and a low of 60F/16C. On the 22nd, the tail end of a cold front passed the area in the evening with a few showers that amounted to 0.05" of precipitation. Fair conditions during the day brought 8.3 hours of sunshine, with a high of 72F/22C and a low of 62F/17C. Thursday the 23rd saw high pressure over the area continuing to produce fair conditions with 4.8 hours of sunshine and a trace of rainfall. The high was 68F/20C with a low of 56F/13C. Saturday the 24th saw high pressure retreat from the area as a deepening low pressure moved up the U.S. East Coast and brought an approaching cold front towards the area. Cloudy skies prevailed with only 3.9 hours of sunshine and a trace of rainfall. Small craft conditions begun midday with a peak wind of 39 knots Saturday night. The high was 72F/22C with a low of 56F/13C. Sunday the 25th saw a cold front move across the area during the morning hours, then high pressure built in during the afternoon. Mainly cloudy conditions that brought 6.3 hours of sunshine with showers that produced 0.41" of rainfall and a peak wind of 45 knots. The high was 72F/22C with a low of 62F/17C. The 26th was fair early as high pressure passed through, with a high of 71F/22C, a low of 61F/16C and 1.7 sun hours. A cold front brought south-southwesterly gale-force winds and storm-force gusts from the evening, passing late overnight with 0.76" in rain and TSTMs. Gale-force winds eased slightly into the 25-30kt range early on the 27th with low pressure influence holding in place with 0.03" in passing showers. The high reached 74F/23C after a low of 66F/19C with 6.5 hours of sunshine. On the 28th cyclogenesis occurred within a new frontal trough to our west with a morning shower band providing a peak wind at the airport of 32kts with a gust to 46kts. The day's high reached 70F/21C with a low of 59F/15C, 4.0 hours of sunshine and 0.14" of precipitation. After a few showers during the day of the 29th resulting in 0.04" of precipitation, high pressure begin to build in with 8.6 hours of sunshine. The high temperature was 64F/18C and the low was 59F/15C. Ahead of an approaching cold front, winds increased overnight on the 30th reaching 32 knots gusting 43 knots. Only a trace of precipitation was recorded with 4.3 hours of sunshine, a high of 67F/19C and a low of 60F/15C.

Produced by the Bermuda Weather Service
Unless otherwise stated, all statistical data are based on observations taken at the Bermuda International Airport.
 Mean Temp.
(°C/°F)
Max Temp.
(°C/°F)
Min Temp.
(°C/°F)
Daily Precip.
Inches
Accumulated Precip.
Inches
Year To Date Precip.
Inches
Sea Surface Temp.
(C/F)
Mean
Sea Level Pressure
" Hg / hPa
Total   3.89    
Mean19.4 / 66.821.5 / 70.816.8 / 62.3   20.1 / 68.130.12 / 1020.0
Departure
From Norm.
0.7 / 1.20.6 / 1.20.6 / 1.1-1.41  0.9 / 1.6 
Max22.2 / 71.924.6 / 76.3 0.95  20.6 / 69.130.51 / 1033.2
Min16.2 / 61.1 11.9 / 53.4   19.6 / 67.329.68 / 1005.1
 Mean Temp.
(°C/°F)
Max Temp.
(°C/°F)
Min Temp.
(°C/°F)
Daily Precip.
Inches
Accumulated Precip.
Inches
Year To Date Precip.
Inches
Sea Surface Temp.
(C/F)
Mean
Sea Level Pressure
" Hg / hPa
1/1/201519.0 / 66.121.6 / 70.917.2 / 63.00.060.060.0620.6 / 69.130.18 / 1022.0
1/2/201519.8 / 67.721.2 / 70.218.5 / 65.30.000.060.0620.6 / 69.130.32 / 1026.8
1/3/201520.6 / 69.022.4 / 72.318.4 / 65.10.000.060.0620.6 / 69.130.46 / 1031.5
1/4/201521.3 / 70.322.6 / 72.720.1 / 68.20.000.060.0620.6 / 69.130.45 / 1031.2
1/5/201522.1 / 71.824.6 / 76.319.6 / 67.30.030.090.0920.6 / 69.130.25 / 1024.4
1/6/201519.3 / 66.721.3 / 70.317.6 / 63.70.200.290.2920.5 / 68.930.18 / 1022.0
1/7/201521.5 / 70.723.4 / 74.119.7 / 67.50.000.290.2920.5 / 68.929.96 / 1014.6
1/8/201516.4 / 61.621.6 / 70.912.9 / 55.20.440.730.7320.5 / 68.930.07 / 1018.3
1/9/201516.2 / 61.118.6 / 65.511.9 / 53.40.160.890.8919.7 / 67.530.34 / 1027.4
1/10/201519.9 / 67.822.3 / 72.117.3 / 63.10.000.890.8919.7 / 67.530.32 / 1026.8
1/11/201519.8 / 67.621.3 / 70.318.7 / 65.70.000.890.8919.7 / 67.530.51 / 1033.2
1/12/201521.0 / 69.722.4 / 72.318.7 / 65.70.121.011.0119.7 / 67.530.43 / 1030.5
1/13/201522.2 / 71.923.6 / 74.521.3 / 70.30.001.011.0120.6 / 69.130.21 / 1023.0
1/14/201520.6 / 69.122.3 / 72.117.5 / 63.50.951.961.9620.6 / 69.130.04 / 1017.3
1/15/201521.3 / 70.323.2 / 73.819.9 / 67.80.031.991.9920.6 / 69.129.97 / 1014.9
1/16/201519.5 / 67.221.3 / 70.317.4 / 63.30.102.092.0920.6 / 69.129.84 / 1010.5
1/17/201517.3 / 63.119.4 / 66.914.9 / 58.80.022.112.1120.6 / 69.130.11 / 1019.6
1/18/201517.2 / 63.119.4 / 66.913.4 / 56.10.072.182.1819.8 / 67.630.22 / 1023.4
1/19/201519.6 / 67.421.6 / 70.917.7 / 63.90.282.462.4619.8 / 67.629.93 / 1013.5
1/20/201518.7 / 65.720.6 / 69.116.1 / 61.00.002.462.4619.8 / 67.630.10 / 1019.3
1/21/201518.6 / 65.521.9 / 71.415.6 / 60.10.002.462.4619.8 / 67.630.12 / 1020.0
1/22/201519.6 / 67.422.2 / 72.016.9 / 62.40.052.512.5119.6 / 67.330.11 / 1019.6
1/23/201517.2 / 62.919.8 / 67.613.2 / 55.80.002.512.5119.6 / 67.330.15 / 1021.0
1/24/201519.3 / 66.722.1 / 71.813.1 / 55.60.002.512.5119.6 / 67.329.97 / 1014.9
1/25/201519.8 / 67.722.3 / 72.116.9 / 62.40.412.922.9219.6 / 67.329.88 / 1011.9
1/26/201519.5 / 67.221.9 / 71.415.9 / 60.60.763.683.6819.6 / 67.329.84 / 1010.5
1/27/201521.1 / 70.023.4 / 74.118.6 / 65.50.033.713.7119.6 / 67.329.68 / 1005.1
1/28/201518.4 / 65.121.1 / 70.015.1 / 59.20.143.853.8519.6 / 67.329.84 / 1010.5
1/29/201516.3 / 61.317.5 / 63.514.7 / 58.50.043.893.8919.6 / 67.330.01 / 1016.3
1/30/201517.5 / 63.519.4 / 66.915.4 / 59.70.003.893.8919.6 / 67.329.99 / 1015.6
 Hours Of
Sunshine
Mean
R.H.
%
Absolute
Max. R.H.
%
Absolute
Min. R.H.
%
Max Of
Mean Wind
knots / °
Peak
Wind
knots / °
Sky Conditions / Weather Notes
PN PC MC OV DZ SH RA GR TS FC HZ BS BR
Total151         
182230191237020002
Mean5.070.584.957.5      
             
Departure
From Norm.
          
0            
Max9.0 93.0 36  46  
             
Min0.0  42.0      
             
 Hours Of
Sunshine
Mean
R.H.
%
Absolute
Max. R.H.
%
Absolute
Min. R.H.
%
Max Of
Mean Wind
knots / °
Peak
Wind
knots / °
Sky Conditions / Weather Notes
PN PC MC OV DZ SH RA GR TS FC HZ BS BR
1/1/2015578.1896716 / 03022 / 030
PNMCOVSH
1/2/20158.561.3735113 / 30018 / 290
PCMC
1/3/20157.573.6876517 / 13019 / 120
PCMCSH
1/4/20158.772.6816217 / 20021 / 200
PCMC
1/5/2015778.2866823 / 25030 / 250
PNPCMCSH
1/6/20150.279.2936513 / 02018 / 010
PNPCMCOVRABR
1/7/2015970.4855724 / 27031 / 270
PCMCSH
1/8/2015068.7894224 / 34038 / 340
PNPCMCOVSH
1/9/20153.467.9894416 / 21026 / 360
PNPCMCOVSH
1/10/20156.774.9866615 / 01021 / 010
PCMCSH
1/11/2015672.1776719 / 08028 / 070
PCMC
1/12/20153.582.3897420 / 10027 / 120
PNMCOVSH
1/13/20157.383.5887818 / 25022 / 200
PCMC
1/14/2015087.1938030 / 24039 / 240
PNMCOVSHRATSBR
1/15/20152.782.5887318 / 23026 / 230
PNMCOVDZSH
1/16/20150.273.8866420 / 32026 / 300
PNMCOVSHRA
1/17/20155.959.2794822 / 04032 / 040
PNPCMCOVSH
1/18/2015461.9874622 / 20026 / 190
PNMCOVSH
1/19/20154.465.3894536 / 20042 / 200
PNPCMCOVSHRA
1/20/20156.856754317 / 30023 / 350
PCMC
1/21/20155.867.1814911 / 25012 / 250
PCMC
1/22/20158.369.7885523 / 33030 / 300
PNPCMCOVSH
1/23/20154.859.3794517 / 02025 / 010
PCMCOVSH
1/24/20153.973875933 / 23039 / 230
PCMCOVSH
1/25/20156.364.8934935 / 23045 / 240
PNMCOVSHRA
1/26/20151.778.1936234 / 20042 / 200
PNMCOVSHRATS
1/27/20156.564.5874831 / 25039 / 250
PNPCMCOVSH
1/28/2015468845232 / 25046 / 270
PNPCMCOVSHRA
1/29/20158.661.7754926 / 31037 / 260
PNPCMCSH
1/30/20154.359725132 / 25043 / 250
PCMCOVSH