Wednesday, June 17, 2015

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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, JUNE 17, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME

PARTLY SUNNY AND COOLER AND MUCH DRIER TODAY
WIND DIRECTION TURNS TO NORTHEAST AND THE
DEW POINT DROPS FROM 60’S YESTERDAY TO 40’S TODAY

Much drier and cooler today with sunshine through
high clouds. Northeast winds slowly diminished.

Today’s Observations:

7 A.M.
Weather: Thin scattered cirrus, 2 levels, cumulus fractus and
cumulus forming all quadrants few stratocumulus distant NNW-NNE
Temperature: 65F; Dew Point: 57F; Wind: N at 9 kts
Sea-level pressure: 30.11 ins. Hg, rising then more slowly
Visibility: 55 miles, light distant haze
6-hr Max temp: 65F
6-hr Min temp: 59F
24-hr precip: Trace
BHO SA 1155 300 -SCT 55 195/65/57/3609/011/ FEW CUFRA
FRMG FEW SC DSNT NNW-NNE FEW PTCHS LWR CI/ 8/801
51030 70000 10065 20059

10 A.M.
Weather: Broken dense cirrus, overcast cirrus,
cumulus/stratocumulus distant SW-NW, thin spots and
breaks in overcast all quadrants
Temperature: 63F; Dew Point: 44F; Wind: ENE at 13G18 kts
Sea-level pressure: 30.16 ins. Hg, rising then more rapidly
BHO SA 1455 E220 BKN 250 OVC 60 215/63/44/0613G18/016/
CU/SC DSNT SW-NW THN SPTS/BINOVC ALQDS LGT DSNT HZ/
8/402 53020

1 P.M.
Weather: Scattered dense cirrus, thin broken cirrus,
thin overcast cirrus, breaks in overcast
Temperature: 66F; Dew Point: 42F; Wind: E at 7 kts
Sea-level pressure: 30.17 ins. Hg, about steady
Visibility: 60 miles, except 70 miles NW
6-hr Max temp: 67F
6-hr Min temp: 63F
6-hr precip: none
BHO SA 1755 220 SCT 250 –BKN 300 –OVC 60 216/66/42/1007/017/
FEW CU DSNT SW-W BINOVC ALQDS VSBY 70 NW/ 8/102 50001 10067
20063

SUMMARY FOR TUESDAY, JUNE 16, 2015

TEMPERATURE (DEGREES F)
MAX…..73   NORMAL…..75
MIN…..56   NORMAL…..57
MEAN….65   NORMAL…..66

DEPARTURE FROM 30-YEAR NORMAL……………………-1
TOTAL DEPARTURE FOR THE MONTH…………………..-30 [-2.1 DEGREES/DAY]**

** correction made from yesterday’s report….

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………0  DEPARTURE………..-2
TOTAL HEATING UNITS FOR THE MONTH…………..86  DEPARTURE……….+30
TOTAL HEATING UNITS FOR THE SEASON………..6490  DEPARTURE………+131
TOTAL HEATING UNITS LAST SEASON TO DATE……6421  DIFFERENCE………+69

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..0   DEPARTURE……….-3
TOTAL COOLING UNITS FOR THE MONTH………….41   DEPARTURE……….+1
TOTAL COOLING UNITS FOR THE SEASON…………90   DEPARTURE………+26
TOTAL COOLING UNITS LAST SEASON TO DATE…….44   DIFFERENCE……..+46

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………18  NW   AT  11:58 P.M.
ASOS…………………..19  NW   AT  11:58 P.M.
DAVIS………………….17 WSW   AT   5:36 P.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………..13 NNW   AT  11:56 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..14  NW   AT  11:58 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….12 WSW   AT   6:09 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..6.5 NW
ASOS…………………..6.8
DAVIS………………….5.4 WNW [290 deg.] *last of several occurrences…

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…..trace  DEPARTURE….-0.15
ASOS……………0.00
TOTAL PRECIPITATION FOR THE MONTH………..2.18   DEPARTURE….-0.40
ASOS……………2.19
TOTAL PRECIPITATION FOR THE YEAR………. 21.55   DEPARTURE….-3.56
ASOS……………N/A ***
*** ASOS annual totals not available due to erroneous readings

PRELIMINARY CLIMATE SUMMARY FOR JUNE CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/RMY 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

6/1  48/46/47/-15/0.69/000/00              32 NE  RMY 34
6/2  47/44/46/-16/…./000/00              28 NNE RMY 28
6/3  59/44/52/-10/0.00/172/19              16 ESE RMY 16
6/4  63/46/55/-8/0.00/445/49               17 E   RMY 16
6/5  70/49/60/-3/T/500/55                  17 NNE RMY 17
6/6  65/52/59/-4/0.06/382/42               26 ENE RMY 27
6/7  73/49/61/-3/0.00/884/97               28 S   RMY 29
6/8  73/50/62/-2/T/310/34                  41 SSW RMY 48
6/9  76/61/69/+4/0.03/228/25               29 SSW RMY 32
6/10 82/57/70/+5/0.00/840/92               24 WSW RMY N/A
6/11 85/61/73/+8/0.00/…/..               29 SSW RMY 32
6/12 86/65/76/+11/…./…/..              26 S   RMY 29
6/13 83/67/75/+10/T/…/..                 24 N   RMY 27
6/14 75/61/68/+2/0.00/…/..               21 SSE RMY 21
6/15 61/52/57/-9/…./000/00               25 SE  RMY 26
6/16 73/56/65/-1/…./…/..               18 NW  RMY N/A

6/17 low since midnight is 59F; normal low is now 58F

DAILY RECORDS FOR JUNE 2015

6/1- NEW RECORD LOW MAXIMUM TEMPERATURE OF 48F
surpasses previous record of 51F in 2004

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

RECORDS FOR JUNE 17
HIGH 93F IN 1894
LOW 44F IN 1920
PRECIP 2.79 INS 2001 (Sub-Tropical storm ALLISON)
PEAK GUST 55e MPH S IN 1977

RECORDS FOR JUNE 18
HIGH 93F IN 1929,1994
LOW 39F IN 1920
PRECIP 3.36 INS 1998
PEAK GUST 48e MPH W IN 1943

TODAY’S REPORT PREPARED BY: Robert Skilling