BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, MAY 15, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME

CLOUDS MOVE IN EARLY AS WINDS GUST TO OVER 40 MPH
 
Despite several sunny breaks between the clouds, temperatures
have struggled to get into the 60's as winds are gusting
over 40 MPH with sustained winds in the 20s and 30s.
 
By the 1 o'clock observation, the peak wind gust for the day
was 45 MPH (39 Knots).Temperatures had begun to warm as the
clouds diminished but remained in the upper 50's with low humidity
and 70 mile visibility.   
 
Today's Observations:
 
7 A.M.
Weather: Scattered Cumulus, Few Stratocumulus distant SW-NW
Temperature: 49F; Dew Point: 34F; Wind: W at 15 kts, Gust to 27
Sea-level pressure: 29.58 ins. Hg, rising then rising more slowly
Visibility: 55 miles, light distant haze
6-hr Max temp: 56F
6-hr Min temp: 47F
24-hr precip: 0.00 in.
BHO SA 1155 05 SCT 55 016/49/34/2715G27/958/ FEW SC DSNT SW-NW LGT
DSNT HZ ALQDS PK WND 27V30/ 8/4// 51016 10056 20047
 
10 A.M.
Weather:  Broken Stratocumulus
Temperature: 53F; Dew Point: 32F; Wind: W AT 24 kts, Gust to 33
Sea-level pressure: 29.58 ins. Hg, rising, then falling
Visibility: 70 miles
BHO SA 1455 E05 BKN 70 017/53/32/2724G33/958/ PK WND  N/A/ 
8/4// 50001
 
1 P.M.
Weather: Scattered Altocumulus, Few Cirrus
Temperature: 57F; Dew Point: 27F; Wind: W at 20G33 kts
Sea-level pressure: 29.59 ins. Hg, falling, then rising
Visibility: 70 miles
6-hr Max temp: 57F
6-hr Min temp: 47F
BHO SA 1755 65 SCT 70 021/57/27/2720G33/959/ FEW CI PK WND 
2836/22/ 8/031/ 53004 10057 20049

SUMMARY FOR SATURDAY, MAY 14, 2016
  
TEMPERATURE (DEGREES F)
MAX.....78   NORMAL.....66
MIN.....54   NORMAL.....47
MEAN....66   NORMAL.....57
 
DEPARTURE FROM 30-YEAR NORMAL..........................+9
TOTAL DEPARTURE FOR THE MONTH.........................-25 [-1.8 DEGREES/DAY]
 
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............0   DEPARTURE.........-12
TOTAL HEATING UNITS FOR THE MONTH.............170   DEPARTURE.........+19
TOTAL HEATING UNITS FOR THE SEASON...........5162   DEPARTURE.......-1024
TOTAL HEATING UNITS LAST SEASON TO DATE......6340   DIFFERENCE......-1178  
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY...................35 SSW   AT  5:22 P.M.*     
                   ASOS........................37 S     AT  4:48 P.M.  
                   DAVIS.......................37 S     AT  5:02 P.M. RMY 37
FASTEST MILE FOR YESTERDAY.....................28 SSW   AT  5:22 P.M.*   
MAXIMUM 2-MINUTE ASOS AVERAGE..................29 SSW   AT  5:23 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE.................28 SSW   AT  5:22 P.M.  
AVERAGE WIND SPEED AND DIRECTION...............12.0 W
                   ASOS........................11.5
                   DAVIS.......................10.9 SW [224 Deg.]
* Last of several occurrences
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.12
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........1.88  DEPARTURE......+0.17
                         ASOS..............1.76
TOTAL PRECIPITATION FOR THE YEAR..........18.82  DEPARTURE......-1.53
                         ASOS.............18.76
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST) 
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE........0.0
TOTAL SNOWFALL FOR THE MONTH..............TRACE  DEPARTURE........0.0
TOTAL SNOWFALL FOR THE SEASON..............57.5  DEPARTURE.......-5.7
 
PRELIMINARY CLIMATE SUMMARY FOR MAY 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
 
5/1 52/39/46/-7/0.08/T/000/00               21 S   AERO 22 SE  RMY 20
5/2 50/41/46/-7/0.31/0.0/000/00             20 NE  AERO 21 NE  RMY 18
5/3 48/43/46/-7/0.16/0.0/000/00             16 E   AERO 16 E   RMY 17
5/4 48/41/45/-9/0.53/0.0/000/00             33 NE  AERO 35 NE  RMY 34
5/5 44/41/43/-11/0.30/0.0/000/00            39 NNE AERO 41 NNE RMY 39
5/6 54/43/49/-5/0.13/0.0/.../..             28 ENE AERO 29 N   RMY 26
5/7 51/43/47/-8/.../0.0/.../..              25 NE  AERO 25 NE  RMY 23
5/8 60/46/53/-2/.../0.0/.../..              47 W   AERO 53 W   RMY 49        
5/9 65/43/54/-1/0.00/0.0/.../..             40 W   AERO 44 W   RMY 40
5/10 69/40/55/0/0.00/0.0/.../..             22 W   AERO 25 WNW RMY 22
5/11 76/50/63/0.00/0.0/.../..               22 WNW AERO 23 WNW*RMY 22
5/12 75/54/65/0.00/0.0/.../..               23 NNE AERO 25 S   RMY 23
5/13 74/52/63/+7/0.21/0.0/.../..            27 S   AERO 27 S   RMY 26 
5/14 78/54/66/+9/0.00/0.0/.../..            35 SSW*AERO 40 SSW RMY 37
 
5/15 low temp since midnight is 47F; normal low now 47F
 
*last of several occurrences
    
DAILY RECORDS FOR MAY 2016
 
5/1/16: DAILY RECORD SNOWFALL OF A TRACE,
TIES PREVIOUS RECORDS SET IN 1905, 1917, 1921, and 1995
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR MAY 15
HIGH 93F IN 1900
LOW 36F IN 1947,1985
PRECIP 1.63 INCHES IN 1978
PEAK GUST 53e MPH NE IN 1978, W 2002
 
RECORDS FOR MAY 16
HIGH 90F IN 1951
LOW 30F IN 1936
PRECIP 2.63 INCHES IN 1954
PEAK GUST 56e MPH NW IN 1952
 
TODAY'S REPORT PREPARED BY: Robert Millette