BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, APRIL 15, 2016 
ALL TIMES ARE IN EASTERN STANDARD TIME

DRY CONDITIONS AND CLEAR SKIES CONTINUE AS HIGH PRESSURE 
SYSTEM MOVES SOUTH

Today was another day with low humidity and clear skies
as a high pressure system continues to bring dry air 
into the area.  Temperatures were still below normal values.
A minimum temperature of 35F occurred early this morning, 3F
below average.  By the 1:00PM EST observation, a maximum
temperature of 53F was recorded, also 3F below average.


Today's Observations:

7 A.M.
Weather: Clear
Temperature: 40F; Dew Point: 21F; Wind: NNE at 12G19 kts
Sea-level pressure: 30.45 ins. Hg, rising, then more quickly
Visibility: 65 miles, light haze in all directions
6-hr Max temp: 40F 
6-hr Min temp: 35F
24-hr precip: 0.00 ins.
BHO SA 1155 CLR 65 313/40/21/0312G19/045/ LGT DSNT HZ/ 
8/000 53010 10040 20035 

10 A.M.
Weather: Clear
Temperature: 46F; Dew Point: 16F; Wind: NE at 11G19 kts
Sea-level pressure: 30.47 ins. Hg, rising, then more slowly
Visibility: 65 miles, light haze in all directions
BHO SA 1455 CLR 65 320/46/16/0411G19/047/ LGT DSNT HZ/ 
8/000 51007

1 P.M.
Weather: Clear
Temperature: 51F; Dew Point: 16F; Wind: NE at 9G17 kts
Sea-level Pressure: 30.45 ins. HG, falling, then more quickly
Visibility: 70 miles, light haze in all directions
6-hr Max temp: 53F
6-hr Min temp: 39F
6-hr Precip: 0.0 ins.
BHO SA 1755 CLR 70 313/51/16/0509G17/045/ LGT DSNT HZ/ 
8/000 58007 10053 20039 


SUMMARY FOR THURSDAY, APRIL 14, 2016 
  
TEMPERATURE (DEGREES F)
MAX.....48   NORMAL.....55
MIN.....33   NORMAL.....37 
MEAN....41   NORMAL.....46

DEPARTURE FROM 30-YEAR NORMAL.........................-5
TOTAL DEPARTURE FOR THE MONTH........................-40 [-2.9 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............24   DEPARTURE..........+5
TOTAL HEATING UNITS FOR THE MONTH.............340   DEPARTURE.........+40
TOTAL HEATING UNITS FOR THE SEASON...........4759   DEPARTURE.......-1025
TOTAL HEATING UNITS LAST SEASON TO DATE......6034   DIFFERENCE......-1275

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................28 ENE AT 11:53 A.M. 
                   ASOS........................29  E  AT 11:53 A.M.    
                   DAVIS.......................26  NE AT 10:01 A.M. RMY 26
FASTEST MILE FOR YESTERDAY.....................18 ENE AT 11:53 A.M.      
MAXIMUM 2-MINUTE ASOS AVERAGE..................18  E  AT  2:12 P.M. 
MAXIMUM 2-MINUTE DAVIS AVERAGE.................18 NNE AT  9:43 A.M.   
AVERAGE WIND SPEED AND DIRECTION...............10.7 NE 
                   ASOS........................11.6  
                   DAVIS.......................9.4 NNE [30 Deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.16
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........3.74  DEPARTURE......+1.18
                         ASOS..............3.83
TOTAL PRECIPITATION FOR THE YEAR..........16.12  DEPARTURE......-0.24
                         ASOS.............16.84

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......+12.9
TOTAL SNOWFALL FOR THE SEASON..............57.5  DEPARTURE.......-4.8

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)
3....: Data not yet available, records not finalized

4/1   66/54/60/+19/..../0.0/.../..          39 SSW AERO N/A    RMY 43
4/2   54/40/47/+6/..../0.0/.../..           23 SSW AERO N/A    RMY N/A        
4/3   40/23/32/-10/..../7.7/.../..          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/.../..          25 NW  AERO N/A    RMY 27
4/6   41/21/31/-12/..../0.0/.../..          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/.../..              41 WSW AERO 45 WSW RMY 42
4/9   47/29/38/-6/0.00/0.0/.../..           33 NW  AERO 39 NW  RMY 32
4/10  49/26/38/-7/0.01/0.0/.../..           30 NW  AERO 32 NW  RMY 31
4/11  58/40/49/+4/0.00/T/.../..             47 S   AERO 52 S   RMY N/A
4/12  59/37/48/3/0.30/0.0/.../..            53 S   AERO 60 S   RMY 54 
4/13  53/33/43/-3/0.00/0.0/.../..           21 NNW AERO 25 NNW RMY 21
4/14  48/33/41/-5/0.00/0.0/.../..           28 ENE AERO 28 NNE* RMY 26

4/15  low temp since midnight is 35F; normal now 38F

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

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):

RECORDS FOR APRIL 15
HIGH 81 IN 1896
LOW 23 IN 1943
PRECIP 1.75 IN. IN 2007
SNOWFALL 1.0 IN. IN 1916, 1962
PEAK GUST 66 MPH E IN 2007       

RECORDS FOR APRIL 16
HIGH 89 IN 2012
LOW 23 IN 1943
PRECIP 2.45 IN. IN 1929
SNOWFALL 2.0 IN. IN 1904, 1962
PEAK GUST 73 MPH E IN 2007

TODAY'S REPORT PREPARED BY: Cece Borries-Strigle