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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, MAY 14, 2017  
ALL TIMES ARE IN EASTERN STANDARD TIME

MOTHER'S DAY NOR'EASTER GIVES BLUE HILL 1.62 INS. OF RAIN 
BY AFTERNOON

The nor'easter that arrived at Blue Hill last night gave us 1.62 ins. 
of rain by the 1:00 P.M. EST observation. This puts us 1.04 ins. above 
normal for the month of May and 3.30 ins. above normal for 2017. A total 
of 0.22 ins. of rain fell after the 7:00 A.M. observation. The rain 
began to slow down throughout the day, but the sky remained covered 
with stratus clouds and visibility stayed around 1/8-1/2 of a mile. 
Winds gradually shifted from the NE in the morning to NW in the afternoon. 
The peak gust so far for today was 33 MPH out of the N at 11:47 A.M. EST. 
Temperatures only increased  by 3F from a minimum of 43F in the early 
morning to a maximum of 46F in the afternoon. Pressure continued to fall
throughout the day.


Today's Observations:

7 A.M.
Weather: Rain, overcast stratus
Temperature: 45F; Dew Point: 45F; Wind: NNE at 14G26 kts,
Peak Wind: 27 kts (31 MPH) NE at 6:14 A.M.
Sea-level pressure: 29.62 ins. Hg, falling, then more quickly
Visibility: 1/8 mile
6-hr Max temp: 45F
6-hr Min temp: 43F
24-hr precip: 1.40 in.
BHO SA 1155 E3 0VC 1/8R 032/45/45/0214G26/962/ PK WND 0427/14/ 8/6// 
58018 MANUAL 70140 ASOS 70139 10045 20043

10 A.M.
Weather: Light rain, overcast stratus
Temperature: 45F; Dew Point: 45F; Wind: N at 15G23 kts,
Peak Wind: 26 kts (30 MPH) N at 9:43 A.M.
Sea-level pressure: 29.55 ins. Hg, falling, then more quickly
Visibility: 1/2 mile
3-hr precip: 0.13 in.
BHO SA 1455 E4 OVC 1/2R- 007/45/45/0015G23/955/ PK WND 0026/43/ 8/6// 
56025 MANUAL 60013 ASOS 60016

1 P.M.
Weather: Drizzle, overcast stratus
Temperature: 46F; Dew Point: 46F; Wind: NNW at 14G24 kts,
Peak Wind: 26 kts (30 MPH) N at 12:02 P.M.
Sea-level pressure: 29.51 ins. Hg, falling unsteadily
Visibility: 1/4 mile
6-hr Max temp: 46F
6-hr Min temp: 45F
6-hr precip: 0.22 in.
BHO SA 1755 E5 OVC 1/4L 992/46/463414G24/951/ PK WND 3526/02/ 8/6// 
56015  MANUAL 60022 ASOS 60025 10046 20045

SUMMARY FOR SATURDAY, MAY 13, 2017
 
TEMPERATURE (DEGREES F)
MAX.....57   NORMAL.....65
MIN.....41   NORMAL.....47
MEAN....49   NORMAL.....56

DEPARTURE FROM 30-YEAR NORMAL.........................-7
TOTAL DEPARTURE FOR THE MONTH........................-50 [-4.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............16   DEPARTURE..........+7
TOTAL HEATING UNITS FOR THE MONTH.............186   DEPARTURE.........+44
TOTAL HEATING UNITS FOR THE SEASON...........5519   DEPARTURE........-658
TOTAL HEATING UNITS LAST SEASON TO DATE......5162   DIFFERENCE.......+357

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................24 ENE AT 10:50 P.M.
                   AERO........................24 E   AT 6:58 P.M.
                   ASOS........................25 NE  AT 11:02 P.M.
                   DAVIS.......................22 ESE AT 10:43 P.M. RMY N/A
FASTEST MILE FOR YESTERDAY.....................18 ENE AT 11:02 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE..................18 NE  AT 11:02 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE.................16 NE  AT 11:03 P.M.
AVERAGE WIND SPEED AND DIRECTION..............9.2 SE
                   ASOS.......................9.9
                   DAVIS......................7.6 E [100 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....1.40  DEPARTURE......+1.28
                         ASOS..............1.39
TOTAL PRECIPITATION FOR THE MONTH..........2.63  DEPARTURE......+1.04
                         ASOS..............2.67
TOTAL PRECIPITATION FOR THE YEAR..........23.44  DEPARTURE......+3.30
                         ASOS...............N/A ***
*** ASOS annual total not available due to erroneous readings


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
M:    Missing data

5/1  50/43/47/-6/T/.../..                  21 N   AERO 18 N   RMY 22
5/2  65/42/54/+1/0.26/.../..               41 W   AERO 44 W   RMY 43 
5/3  52/42/53/0/0.00/.../..                37 WNW*AERO 39 WNW RMY 40
5/4  65/40/53/-1/0.00/.../..               23 S   AERO 23 S   RMY 24
5/5  51/44/48/-6/0.73/.../..               28 E   AERO 28 E   RMY N/A
5/6  65/50/58/+4/0.23/.../..               46 SSE AERO 48 SSE RMY 49
5/7  63/47/55/0/T/.../..                   35 S   AERO 38 S   RMY 39
5/8  54/38/46/-9/T/.../..                  29 WSW AERO 29 WSW RMY 32
5/9  53/36/45/-10/T/.../..                 20 ESE AERO 17 ESE RMY 19
5/10 57/42/50/-5/0.00/.../..               17 NNE AERO 16 NW  RMY N/A
5/11 58/45/52/-4/0.00/.../..               23 NE* AERO 23 NE  RMY 23 
5/12 57/41/49/-7/0.01/.../..               21 NE  AERO 20 NE  RMY 19
5/13 57/41/49/-7/.../.../..                24 ENE AERO 24 E   RMY N/A

5/14 Low temp since midnight is 43F; normal low is now 47F


DAILY RECORDS FOR MAY

None so far.

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):      

RECORDS FOR MAY 14
HIGH 85F IN 1961
LOW 33F IN 1895
PRECIP 1.93 INCHES IN 2006
PEAK GUST 53 MPH S IN 2009

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

TODAY'S REPORT PREPARED BY: Lizzy Suzedell