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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, APRIL 22, 2016 
ALL TIMES ARE IN EASTERN STANDARD TIME

TEMPERATURES REACH 80F BY 1:00 PM EST OBSERVATION

Overnight temperatures reached a low of 58F this
morning, 18F above normal.  Light rain showers began
after the 7:00 AM EST observation, but only a trace of
precipitation was measured.  Temperatures climbed to 80F
by the 1:00PM EST observation, 22F above average and
several degrees below the record for the date of 85F
observed in 1977 and 2001. 


Today's Observations:

7 A.M.
Weather: Broken nimbostratus
Temperature: 60F; Dew Point: 41F; Wind: SW at 8 kts,
Sea-level pressure: 29.94 ins. Hg, rising, then  more quickly
Visibility: 40 miles, thin fog in all directions
6-hr Max temp: 60F 
6-hr Min temp: 58F
24-hr precip: 0.00 ins.
BHO SA 1155 E120 BKN 40 139/60/41/2308/994/ THN FG ALQDS/ 
8/020 53006 10060 20058

10 A.M.
Weather: Broken stratocumulus, overcast altostratus
Temperature: 70F; Dew Point: 46F; Wind: estimated SSW at 5 kts,
Wind Speed: Light
Sea-level pressure: 29.95 ins. Hg, rising, then falling
Visibility: 40 miles, hazy in all directions
BHO SA 1455 E85 BKN 150 OVC 40 143/70/46/E2005/995/ 
HAZY WND LGT/ 8/52/ 51004

1 P.M.
Weather: Few cumulus SSW-WNW, broken altocumulus, broken cirrus
Temperature: 80F; Dew Point: 44F; Wind: S at 17G21 kts,
Sea-level Pressure: 29.88 ins. HG, falling, then more quickly
Visibility: 30 miles, hazy in all directions
6-hr Max temp: 80F
6-hr Min temp: 59F
BHO SA 1755 E140 BKN 250 BKN 30 118/80/44/1917G21/988/ 
FEW CU SSW-WNW HAZY/ 8/252 58025 10080 20059


SUMMARY FOR THURSDAY, APRIL 21, 2016 
  
TEMPERATURE (DEGREES F)
MAX.....76   NORMAL.....58
MIN.....38   NORMAL.....40 
MEAN....57   NORMAL.....49

DEPARTURE FROM 30-YEAR NORMAL.........................+8
TOTAL DEPARTURE FOR THE MONTH........................-25 [-1.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............8   DEPARTURE..........-8
TOTAL HEATING UNITS FOR THE MONTH.............445   DEPARTURE.........+32
TOTAL HEATING UNITS FOR THE SEASON...........4864   DEPARTURE.......-1041
TOTAL HEATING UNITS LAST SEASON TO DATE......6118   DIFFERENCE......-1254

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................28  W  AT  2:27 P.M. 
                   ASOS........................27  W  AT  2:28 P.M.    
                   DAVIS.......................27 WSW AT  2:27 P.M. RMY 28
FASTEST MILE FOR YESTERDAY.....................22  W  AT  2:27 P.M.      
MAXIMUM 2-MINUTE ASOS AVERAGE..................22  W  AT  2:28 P.M. 
MAXIMUM 2-MINUTE DAVIS AVERAGE.................21 WSW AT  2:28 P.M.   
AVERAGE WIND SPEED AND DIRECTION...............11.5 WSW 
                   ASOS........................11.4
                   DAVIS.......................10.4 SW [230 Deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.13
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........3.59  DEPARTURE......+0.26
                         ASOS..............3.88
TOTAL PRECIPITATION FOR THE YEAR..........16.17  DEPARTURE......-1.16
                         ASOS.............16.89

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......+12.3
TOTAL SNOWFALL FOR THE SEASON..............57.5  DEPARTURE.......-5.4

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

4/21  low temp since midnight is 58; normal now 40F

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 22
HIGH 85 IN 1977, 2001
LOW 26 IN 1981
PRECIP 1.85 IN. IN 2000
SNOWFALL 3.0 IN. IN 1940
PEAK GUST 68e MPH NW IN 1945

RECORDS FOR APRIL 23
HIGH 85 IN 1908, 2007 
LOW 25 IN 1933,1989
PRECIP 1.99 IN. IN 2012
SNOWFALL 2.0 IN. IN 2012
PEAK GUST 64 MPH WNW IN 1962

TODAY'S REPORT PREPARED BY: Cecilia Borries-Strigle