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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, APRIL 27, 2016 
ALL TIMES ARE IN EASTERN STANDARD TIME

CLEAR SKIES, BUT STILL BELOW AVERAGE TEMPERATURES

An additional 0.02 inches of precipitation fell after
yesterday's 1:00 PM EST observation, making the
24-hour precipitation total 0.36 inches.  This brings the
monthly total 0.16 inches above normal; however, the annual
total is still 1.26 inches below normal.

High pressure moving into the area today gave us mostly 
clear skies, decreasing humidity, and increasing temperatures.
Temperatures are still below normal with a low of 33F recorded
this morning, 9F below average.  By the 1:00 PM EST observation,
a maximum of 58F was recorded, 2F below average.


Today's Observations:

7 A.M.
Weather: Scattered cirrus
Temperature: 38F; Dew Point: 34F; Wind: NW at 7 kts,
Sea-level pressure: 29.93 ins. Hg, rising, then more slowly
Visibility: 70 miles
6-hr Max temp: 39F 
6-hr Min temp: 33F
24-hr precip: 0.36 in.
BHO SA 1155 250 SCT 70 135/38/34/3207/993/ 
8/001 51007 ASOS 70035 MANUAL 70036 10039 20033
 
10 A.M.
Weather: Few cumulus E-SE, few cirrostratus E-SW
Temperature: 50F; Dew Point: 40F; Wind: estimated NW at 5 kts,
Wind Speed: Light
Sea-level pressure: 29.95 ins. Hg, rising, then falling
Visibility: 70 miles
BHO SA 1455 CLR 70 142/50/40/E3205/995/ FEW CU E-SE 
FEW CS E-SW WND LGT/ 8/105 50002

1 P.M.
Weather: Few cumulus E-WSW, few cirrostratus WNW-NNW
Temperature: 58F; Dew Point: 21F; Wind: estimated SW at 6 kts,
Sea-level Pressure: 29.90 ins. HG, falling, then more slowly
Visibility: 70 miles
6-hr Max temp: 58F
6-hr Min temp: 40F  
BHO SA 1755 CLR 70 125/58/21/E2306/990/ FEW CU E-WSW 
FEW CS WNW-NNW WND LGT/ 8/105 56017 10058 20040

SUMMARY FOR TUESDAY, APRIL 26, 2016 
  
TEMPERATURE (DEGREES F)
MAX.....52   NORMAL.....60
MIN.....35   NORMAL.....42 
MEAN....44   NORMAL.....51

DEPARTURE FROM 30-YEAR NORMAL.........................-7
TOTAL DEPARTURE FOR THE MONTH.........................-9 [-0.5] DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............21   DEPARTURE..........+7
TOTAL HEATING UNITS FOR THE MONTH.............507   DEPARTURE.........+10
TOTAL HEATING UNITS FOR THE SEASON...........4926   DEPARTURE.......-1055
TOTAL HEATING UNITS LAST SEASON TO DATE......6214   DIFFERENCE......-1288   

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................33  E   AT   5:46 A.M.  
                   ASOS........................34  E   AT   5:47 A.M.     
                   DAVIS.......................30  E   AT   5:37 A.M. RMY 31
FASTEST MILE FOR YESTERDAY.....................23  E   AT   5:37 A.M.       
MAXIMUM 2-MINUTE ASOS AVERAGE..................24  E   AT   5:38 A.M.  
MAXIMUM 2-MINUTE DAVIS AVERAGE.................22  E   AT   5:38 A.M.    
AVERAGE WIND SPEED AND DIRECTION...............11.8 ENE 
                   ASOS........................11.8
                   DAVIS.......................10.3 NE [50 Deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.36  DEPARTURE......+0.22
                         ASOS..............0.35
TOTAL PRECIPITATION FOR THE MONTH..........4.17  DEPARTURE......+0.16
                         ASOS..............4.36
TOTAL PRECIPITATION FOR THE YEAR..........16.75  DEPARTURE......-1.26
                         ASOS.............17.37

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)  
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE........0.0
TOTAL SNOWFALL FOR THE MONTH...............15.0  DEPARTURE......+12.1
TOTAL SNOWFALL FOR THE SEASON..............57.5  DEPARTURE.......-5.6

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/-1/0.00/0.0/783/97           36 NNE AERO 31 NNE RMY 34
4/17 62/36/49/+2/0.00/0.0/809/100          20 NNE AERO 20 NNE RMY 19
4/18 67/45/56/+8/.../0.0/715/88            28 ENE AERO 29 NE  RMY 28
4/19 55/41/48/0/.../0.0/440/54             25 NW  AERO 30 NW  RMY N/A
4/20 57/41/49/0/0.00/0.0/801/98            29 NNW AERO 30 NNW RMY 29
4/21 76/38/57/+8/0.00/0.0/795/97           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
4/24 59/38/49/-1/0.00/0.0/.../..           23 NW AERO 25 NW RMY 24
4/25 63/41/52/+2/0.00/0.0/.../..           23 W   AERO 24 W   RMY N/A
4/26 52/35/44/-7/.../0.0/.../..            33 E   AERO 35 E   RMY 31

4/27 low temp since midnight is 33F; normal now 42F

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 27
HIGH 93 IN 1990
LOW 28 IN 1919
PRECIP 1.89 IN 1979
SNOWFALL 2.7 IN. IN 1993
PEAK GUST 65e MPH N IN 1941

RECORDS FOR APRIL 28
HIGH 92 IN 1990, 2009
LOW 26 IN 1947
PRECIP 2.41 IN 1904
SNOWFALL 10.0 IN. IN 1987
PEAK GUST 69 MPH NE 1967

TODAY'S REPORT PREPARED BY: Cecilia Borries-Strigle