BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, APRIL 24, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME
 
COOLER TEMPERATURES ARE IN PLACE AFTER YESTERDAYS RAIN.
 
Yesterday's high temperature of 60 occurred at midnight as
temperatures dropped throughout most of the day and only rebounded
slightly from the morning lows.  Even with this drop in temperature,
average temperatures for the day remained above normal. 
 
This morning, clear skies with a few cirrus type clouds have
been in place since the 7 o'clock observation. The temperature
was 44 degrees with light winds. 
 
The winds slowly began to pick up during the afternoon as
temperatures increased into the upper 50's by the 1 o'clock
observation.  At that time, there were no clouds in the sky with
very low humidity down in the lower 20s 
 
 
Today's Observations:
 
7 A.M.
Weather: Few Cirrus SSW
Temperature: 44F; Dew Point: 20F; Wind: N at 5 kts,
Wind: Light
Sea-level pressure: 30.05 ins. Hg, rising slightly
Visibility: 75 miles
6-hr Max temp: 44F
6-hr Min temp: 38F
24-hr precip: 0.03 in.
BHO SA 1155 CLR 75 175/44/20/3505/005/ FEW CI SSW WND LGT/ 8/001
51024 ASOS 70002 MANUAL 70003 10044 20038
 
10 A.M.
Weather: Few Cirrostratus WNW-NNW  
Temperature: 50F; Dew Point: 17F; Wind: VRB at 6 kts,
Wind: Light,Direction variable WNW-N
Sea-level pressure: 30.03 ins. Hg, rising, then falling and lower
Visibility: 75 miles 
BHO SA 1455 CLR 75 172/50/17/VRB06/003/ FEW CS WNW-NNW
WND LGT AND VRB/8/008 58003
 
1 P.M.
Weather: Clear, SKC
Temperature: 58F; Dew Point: 21F; Wind: NNW at 8 kts, 
Sea-level Pressure: 29.99 ins. HG, falling then more slowly
Visibility: 75 miles
6-hr Max temp: 58F
6-hr Min temp: 44F 
BHO SA 1755 CLR 75 158/58/21/3308/999/ SKC/ 8/000/ 56014 10058
20044  
 
SUMMARY FOR SATURDAY, APRIL 23, 2016
  
TEMPERATURE (DEGREES F)
MAX.....60   NORMAL.....59
MIN.....46   NORMAL.....41
MEAN....53   NORMAL.....50
 
DEPARTURE FROM 30-YEAR NORMAL........................+3
TOTAL DEPARTURE FOR THE MONTH.........................-3 [-0.3] DEGREES/DAY]
 
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............12   DEPARTURE..........-4
TOTAL HEATING UNITS FOR THE MONTH.............457   DEPARTURE..........+4
TOTAL HEATING UNITS FOR THE SEASON...........4876   DEPARTURE.......-1060
TOTAL HEATING UNITS LAST SEASON TO DATE......6150   DIFFERENCE......-1274  
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY...................26  NNW  AT  8:36 P.M. 
                   ASOS........................28  NNW  AT  8:37 P.M.    
                   DAVIS.......................22  NNW  AT  8:28 P.M. RMY 24
FASTEST MILE FOR YESTERDAY.....................17  NNW  AT  8:37 P.M.      
MAXIMUM 2-MINUTE ASOS AVERAGE..................18  NNW  AT 10:39 P.M. 
MAXIMUM 2-MINUTE DAVIS AVERAGE.................16  NNW  AT  8:41 P.M.   
AVERAGE WIND SPEED AND DIRECTION...............8.5 NNW
                   ASOS........................8.6
                   DAVIS.......................7.4 NNW [330 Deg.]
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.03  DEPARTURE......-0.11
                         ASOS..............0.02
TOTAL PRECIPITATION FOR THE MONTH..........3.81  DEPARTURE......+0.20
                         ASOS..............4.01
TOTAL PRECIPITATION FOR THE YEAR..........16.39  DEPARTURE......-1.22
                         ASOS.............17.02
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST) 
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.......-0.1
TOTAL SNOWFALL FOR THE MONTH...............15.0  DEPARTURE......+12.2
TOTAL SNOWFALL FOR THE SEASON..............57.5  DEPARTURE.......-5.5
 
PRELIMINARY CLIMATE SUMMARY FOR APRIL CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/ AERO/RMY GUST
AERO: Aerovane wind recording system gust
RMY:  R.M. Young wind gust recording system
TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized
 
4/1  66/54/60/+19/..../0.0/092/12          39 SSW AERO N/A    RMY 43
4/2  54/40/47/+6/..../0.0/023/03           23 SSW AERO N/A    RMY N/A       
4/3  40/23/32/-10/..../7.7/354/46          46 W   AERO N/A    RMY 55
4/4  28/21/25/-17/0.68/7.3/000/00          29 NNE AERO N/A    RMY 25
4/5  35/19/27/-16/0.00/0.0/660/85          25 NW  AERO N/A    RMY 27
4/6  41/21/31/-12/..../0.0/483/62          44 S   AERO N/A    RMY N/A  
4/7  56/41/49/+6/..../0.0/000/00           53 SSE AERO 59 SSE RMY 55
4/8  52/32/42/-2/T/0.0/353/45              41 WSW AERO 45 WSW RMY 42
4/9  47/29/38/-6/0.00/0.0/417/53           33 NW  AERO 39 NW  RMY 32
4/10 49/26/38/-7/0.01/0.0/735/93           30 NW  AERO 32 NW  RMY 31
4/11 58/40/49/+4/0.00/T/182/23             47 S   AERO 52 S   RMY N/A
4/12 59/37/48/+3/0.30/0.0/040/05           53 S   AERO 60 S   RMY 54
4/13 53/33/43/-3/0.00/0.0/798/100          21 NNW AERO 25 NNW RMY 21
4/14 48/33/41/-5/0.00/0.0/793/99           28 ENE AERO 28 NNE RMY 26
4/15 54/35/45/-2/0.00/0.0/804/100          26 NNE AERO 28 NNE RMY N/A
4/16 52/39/46/-1/0.00/0.0/.../...          36 NNE AERO 31 NNE RMY 34
4/17 62/36/49/+2/0.00/0.0/.../...          20 NNE AERO 20 NNE RMY 19
4/18 67/45/56/+8/.../0.0/.../...           28 ENE AERO 29 NE  RMY 28
4/19 55/41/48/0/.../0.0/.../...            25 NW  AERO 30 NW  RMY N/A
4/20 57/41/49/0/0.00/0.0/.../...           29 NNW AERO 30 NNW RMY 29
4/21 76/38/57/+8/0.00/0.0/.../...          28 W   AERO 29 WSW RMY 28
4/22 80/56/68/+19/..../.../..              36 S   AERO 37 S   RMY 36
4/23 60/46/53/+3/..../.../.../..           26 NNW AERO 60 NNW RMY 24
 
4/25 low temp since midnight is 38F; normal now 41F
 
DAILY RECORDS FOR APRIL 2016
 
4/1/16: NEW DAILY RECORD HIGH MINIMUM TEMPERATURE OF 54F,
BREAKS PREVIOUS RECORD OF 51F SET IN 1948
 
4/4/16: NEW DAILY RECORD SNOWFALL OF 7.3 INS,
BREAKS PREVIOUS RECORD OF 3.7 INS SET IN 1975
 
4/4/16: NEW DAILY RECORD LOW MAXIMUM TEMPERATURE OF 28F,
BREAKS PREVIOUS RECORD OF 32F SET AND TIED IN 1896, 1908, 1975
 
4/22/16: NEW DAILY RECORD HIGH MINIMUM TEMPERATURE OF 56F,
BREAKS PREVIOUS RECORD OF 55F IN 1977 AND 1992
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR APRIL 24
HIGH 82 IN 2001
LOW 22 IN 1930
PRECIP 2.51 INS IN 1898
SNOWFALL 1.2 INS IN 1967
PEAK GUST 59 MPH NW IN 1962
 
RECORDS FOR APRIL 25
HIGH 83 IN 2009
LOW 24 IN 1892
PRECIP 1.38 IN. IN 1901
SNOWFALL 0.7 IN. IN 2002.
PEAK GUST 66 MPH SE IN 1968
 
TODAY'S REPORT PREPARED BY: Robert Millette