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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, APRIL 14, 2016 
ALL TIMES ARE IN EASTERN STANDARD TIME

BELOW NORMAL TEMPERATURES BUT CLEAR SKIES

Temperatures dipped to a low of 33F last night, below the 
average low temperature of 37F.  Skies remained mostly 
clear today with cirrostratus and a few small fair-weather
cumulus present during each observation.

By the 1:00 PM observation a maximum temperature of 48F 
was recorded, 7F below normal. 


Today's Observations:

7 A.M.
Weather: Clear, few cirrostratus in all directions
Temperature: 41F; Dew Point: 29F; Wind: ENE at 7G16 kts
Sea-level pressure: 30.39 ins. Hg, rising, then more slowly
Visibility: 70 miles, light haze in all directions
6-hr Max temp: 41F 
6-hr Min temp: 33F
24-hr precip: 0.00 ins.
BHO SA 1155 CLR 70 290/41/29/0607G16/039/ 
FEW CS ALQDS LGT DSNT HZ/ 8/005 51017 10041 20033

10 A.M.
Weather: Scattered cirrostratus, few cumulus SE-NW
Temperature: 45F; Dew Point: 26F; Wind: NE at 14G22 kts
Sea-level pressure: 30.41 ins. Hg, rising, then more slowly
Visibility: 70 miles, light haze in all directions
BHO SA 1455 250 SCT 70 298/45/26/0514G22/041/ 
FEW CU SE-NW LGT DSNT HZ/ 8/108 51008


1 P.M.
Weather: Clear, few cirrostratus NW-SSW
Temperature:46F; Dew Point: 22F; Wind: ENE at 13G21 kts
Sea-level Pressure: 30.38 ins. HG, falling, then more slowly
Visibility: 70 miles, light haze in all directions
6-hr Max temp: 48F
6-hr Min temp: 41F
6-hr Precip: 0.0 ins.
BHO SA 1755 CLR 70 288/46/22/0713G21/3038/ 
FEW CS NW-SSW LGT DSNT HZ/ 8/008 56010 10048 20041


SUMMARY FOR WEDNESDAY, APRIL 13, 2016 
  
TEMPERATURE (DEGREES F)
MAX.....53   NORMAL.....55
MIN.....33   NORMAL.....37 
MEAN....43   NORMAL.....46

DEPARTURE FROM 30-YEAR NORMAL.........................-3
TOTAL DEPARTURE FOR THE MONTH........................-35 [-2.9 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............22   DEPARTURE..........+3
TOTAL HEATING UNITS FOR THE MONTH.............316   DEPARTURE.........+35
TOTAL HEATING UNITS FOR THE SEASON...........4735   DEPARTURE.......-1030
TOTAL HEATING UNITS LAST SEASON TO DATE......6043   DIFFERENCE......-1292

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................21 NNW AT  9:27 A.M.* 
                   ASOS........................23  NW AT  9:27 A.M.    
                   DAVIS.......................19 NNE AT  8:44 A.M. RMY 21
FASTEST MILE FOR YESTERDAY.....................13 NNW AT  8:40 A.M.      
MAXIMUM 2-MINUTE ASOS AVERAGE..................15 WNW AT  9:28 A.M. 
MAXIMUM 2-MINUTE DAVIS AVERAGE.................13  N  AT  8:45 A.M.   
AVERAGE WIND SPEED AND DIRECTION...............8.5 NW 
                   ASOS........................8.6  
                   DAVIS.......................7.3 NNW [340 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......+1.34
                         ASOS..............3.83
TOTAL PRECIPITATION FOR THE YEAR..........16.12  DEPARTURE......-0.08
                         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......+13.0
TOTAL SNOWFALL FOR THE SEASON..............57.5  DEPARTURE.......-4.7

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  low temp since midnight is 33F; normal now 37F

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 14
HIGH 80 IN 1945
LOW 21 IN 1923
PRECIP 2.22 IN. IN 1895
SNOWFALL 8.4 IN. IN 1953
PEAK GUST 71e MPH W IN 1943

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       

TODAY'S REPORT PREPARED BY: Cece Borries-Strigle