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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, APRIL 12, 2016 
ALL TIMES ARE IN EASTERN STANDARD TIME

MORNING COLD FRONT BRINGS RAIN AND GUSTY WINDS

Winds this morning peaked at 53 MPH at 5:33 AM EST 
ahead of a cold front. Rain showers started late 
this morning equaling 0.06 ins. by the 10:00 AM EST 
observation.  A maximum temperature of 59F was 
recorded at 8:00 AM EST, +4 degrees above normal.

After the passage of the cold front, winds shifted
from south to west.  Precipitation totaled 0.29 ins.,
and temperature had also dropped to 49F by the 
1:00 PM EST observation.  

Today marks the last day for Chief Observer Brian
Fitzgerald who will return to work at the Mount Washington
Observatory- this time as their Director of Education.


Today's Observations:

7 A.M.
Weather: Broken stratocumulus, broken altostratus, 
few cumulus fractus in all directions, distant showers SSE-S and SW-N
Temperature: 58F; Dew Point: 49F; Wind: SSW at 26G38 kts
Peak Wind: 44 kts SSW at 6:24AM EST
Sea-level pressure: 29.96 ins. Hg, rising, then steady
Visibility: 20 miles, except 15 miles SSE-S, thin fog in
all directions
6-hr Max temp: 58F 
6-hr Min temp: 54F
24-hr precip: Trace 
BHO SA 1155 E75 BKN 160 OVC 20 145/58/49/2026G38/996/ 
VSBY 15 SSE-S FEW CUFRA ALQDS SHWRS DSNT SSE-S AND SW-N 
THN FG ALQDS PK WND 2044/24/ 8/52/ 51002 10058 20054  

10 A.M.
Weather: Light rain, broken stratus fractus, overcast nimbostratus
Temperature: 54F; Dew Point: 52F; Wind: SSW at 14G22 kts
Peak Wind: 26 kts S at 9:26AM EST
Sea-level pressure: 29.96 ins. Hg, falling, then rising
Visibility: 3 miles, thin fog in all directions
3-hr precip: 0.06 ins.
BHO SA 1455 E33 BKN 75 OVC 3R- 147/54/52/2014G22/996/
THN FG ALQDS PK WND 1926/26/ 8/72/ 53002 ASOS 60004 MANUAL 60006

1 P.M.
Weather: Scattered stratus fractus, overcast nimbostratus,
distant showers W-NNW
Temperature: 49F; Dew Point: 46F; Wind: WNW at 17G24 kts
Peak Wind: WNW 25 knots at 12:44PM EST
Wind Shift at 12:42PM EST
Sea-level Pressure: 29.98 ins. HG, falling, then rising
Visibility: 30 miles, except 20 miles W-WNW, 15 miles NW-NNW,
thin fog in all directions
6-hr Max temp: 59F
6-hr Min temp: 48F
6-hr Precip: 0.29 ins.
BHO SA 1755 7 SCT E15 OVC 30 153/49/46/3017G24/998/ 
R-E47 VSBY W-WNW 20 MI NW-NNW 15 MI SHWRS DSNT W-NNW 
THN FG ALQDS WSHFT 1744 PK WND 3025/44/ 8/6// 53006 
ASOS 60029 MANUAL 60029 10059 20048


SUMMARY FOR MONDAY, APRIL 11, 2016 
  
TEMPERATURE (DEGREES F)
MAX.....58   NORMAL.....54
MIN.....40   NORMAL.....36 
MEAN....49   NORMAL.....45

DEPARTURE FROM 30-YEAR NORMAL.........................+4
TOTAL DEPARTURE FOR THE MONTH........................-35 [-3.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............16   DEPARTURE..........-4
TOTAL HEATING UNITS FOR THE MONTH.............277   DEPARTURE.........+35
TOTAL HEATING UNITS FOR THE SEASON...........4696   DEPARTURE.......-1030
TOTAL HEATING UNITS LAST SEASON TO DATE......6007   DIFFERENCE......-1311

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................47  S  AT  4:34 P.M. 
                   ASOS........................48  S  AT  4:29 P.M.    
                   DAVIS.......................46 SSW AT  4:22 P.M. RMY N/A
FASTEST MILE FOR YESTERDAY.....................35  S  AT  4:28 P.M.      
MAXIMUM 2-MINUTE ASOS AVERAGE..................36  S  AT  4:29 P.M. 
MAXIMUM 2-MINUTE DAVIS AVERAGE.................35  S  AT  4:28 P.M.   
AVERAGE WIND SPEED AND DIRECTION...............21.4 S 
                   ASOS........................21.1    
                   DAVIS.......................19.6 S [190 Deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M...TRACE  DEPARTURE......-0.17
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........3.24  DEPARTURE......+1.37
                         ASOS..............3.53
TOTAL PRECIPITATION FOR THE YEAR..........15.82  DEPARTURE......-0.05 
                         ASOS.............16.54

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)  
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE.......-0.2
TOTAL SNOWFALL FOR THE MONTH...............15.0  DEPARTURE......+13.2
TOTAL SNOWFALL FOR THE SEASON..............57.5  DEPARTURE.......-4.5

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  low temp since midnight is 49F; normal now 36F

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 12
HIGH 82 IN 1945
LOW 17 IN 1926
PRECIP 1.51 IN. IN 1993
SNOWFALL 12.0 IN. IN 1894
PEAK GUST 65e MPH W IN 1978

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

TODAY'S REPORT PREPARED BY: Brian Fitzgerald/Cece Strigle