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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY. APRIL 13, 2016 
ALL TIMES ARE IN EASTERN STANDARD TIME

CLEAR SKIES AND WARMING TEMPERATURES AFTER YESTERDAY'S RAIN

Temperatures fell yesterday afternoon and evening to a
minimum of 33F, which occurred early this morning, 4F below
normal.  Precipitation equaled 0.01 ins. at this morning's 
7:00 AM EST observation,  which brought the 24-hour total to 
0.30 ins.

By the 1:00 PM EST observation, temperatures had risen to a
maximum of 51F.  Winds were light at an estimated 5 knots
from the NNW.  


Today's Observations:

7 A.M.
Weather: Clear, few cumulus distant E-SE
Temperature: 40F; Dew Point: 28F; Wind: NNW at 10 kts
Sea-level pressure: 30.41 ins. Hg, rising, then more quickly
Visibility: 70 miles, light haze in all directions
6-hr Max temp: 40F 
6-hr Min temp: 33F
24-hr precip: 0.30 ins.
BHO SA 1155 CLR 70 297/40/28/3410/041/ FEW CU DSNT E-SE 
LGT DSNT HZ ALQDS/ 8/100 53026 ASOS 70030 MANUAL 70030 
10040 20033

10 A.M.
Weather: Clear, few small cumulus SSW-NW and few distant
cumulus W-SSE and N
Temperature: 48F; Dew Point: 27F; Wind: N at 8 kts
Sea-level pressure: 30.42 ins. Hg, rising, then falling
Visibility: 70 miles, light haze in all directions
BHO SA 1455 CLR 70 300/48/27/3608/042/ FEW SML CU SSW-NW 
FEW CU DSNT W-SSE AND N LGT DSNT HZ/ 8/100 50003

1 P.M.
Weather: Clear, few distant cumulus E-SW and NW-N
Temperature: 51F; Dew Point: 30F; Wind: estimated SSW at 5 kts
Sea-level Pressure: 30.35 ins. HG, falling, then more quickly
Visibility: 70 miles, light haze in all directions
6-hr Max temp: 51F
6-hr Min temp: 40F
6-hr Precip: 0.0 ins.
BHO SA 1755 CLR 70 278/51/30/E2005/035/ FEW DSNT CU E-SW AND NW-N
LGT DSNT HZ WND LGT/ 8/100 58019 10051 20040


SUMMARY FOR TUESDAY, APRIL 12, 2016 
  
TEMPERATURE (DEGREES F)
MAX.....59   NORMAL.....54
MIN.....37   NORMAL.....36 
MEAN....48   NORMAL.....45

DEPARTURE FROM 30-YEAR NORMAL.........................+3
TOTAL DEPARTURE FOR THE MONTH........................-32 [-2.9 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............17   DEPARTURE..........-3
TOTAL HEATING UNITS FOR THE MONTH.............294   DEPARTURE.........+32
TOTAL HEATING UNITS FOR THE SEASON...........4713   DEPARTURE.......-1033
TOTAL HEATING UNITS LAST SEASON TO DATE......6020   DIFFERENCE......-1307

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................53  S  AT  5:33 A.M.* 
                   ASOS........................55  S  AT  5:33 A.M.    
                   DAVIS.......................55  S  AT  5:32 A.M. RMY 54
FASTEST MILE FOR YESTERDAY.....................36  S  AT  5:33 A.M.      
MAXIMUM 2-MINUTE ASOS AVERAGE..................36 SSW AT  6:30 A.M. 
MAXIMUM 2-MINUTE DAVIS AVERAGE.................36 SSW AT  5:33 A.M.   
AVERAGE WIND SPEED AND DIRECTION...............18.3 S 
                   ASOS........................18.1    
                   DAVIS.......................16.3 SW [220 Deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.30  DEPARTURE......+0.13
                         ASOS..............0.30
TOTAL PRECIPITATION FOR THE MONTH..........3.74  DEPARTURE......+1.50
                         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......+13.1
TOTAL SNOWFALL FOR THE SEASON..............57.5  DEPARTURE.......-4.6

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)
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  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 13
HIGH 85 IN 1945
LOW 22 IN 1939
PRECIP 2.51 IN. IN 2004
SNOWFALL 6.8 IN. IN 1933
PEAK GUST 59 MPH SSW IN 1995

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

TODAY'S REPORT PREPARED BY: Cece Borries-Strigle