Friday, June 17, 2016

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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, JUNE 17, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME

EASTERLY WINDS BRING COOLER TEMPERATURES

Yesterday’s calm winds increased and switched directions from NW
to NE-E just before midnight last night.  The cooler air from the
ocean has led to cooler temperatures than the previous days but
still seasonable.  The maximum temp. at the 1:00PM EST observation
was 75F.

Dry conditions continued with relative humidity dropping to the 30%
range by 1:00PM.  Visibility remained at 70 miles at each observation.

Today’s Observations:

7 A.M.
Weather: Scattered altocumulus, scattered cirrocumulus
Temperature: 65F; Dew Point: 52F; Wind: estimated NE at 4 kts,
Wind: Light and variable
Sea-level pressure: 29.93 in. Hg, rising, then more slowly
Visibility: 70 miles
6-hr Max temp: 65F
6-hr Min temp: 59F
24-hr precip: 0.00 in.
BHO SA 1155 84 SCT 250 SCT 70 134/65/52/E0401/993/ WND L/V/
8/039 51026 10065 20059

10 A.M.
Weather: Few cumulus in all directions, scattered cirrus
Temperature: 72F; Dew Point: 47F; Wind: ENE at 7 kts
Sea-level pressure: 29.98 in. Hg, rising, then more slowly
Visibility: 70 miles
BHO SA 1455 SCT 250 70 151/72/47/0707/998/ FEW CU ALQDS/
8/101 51017

1 P.M.
Weather: Scattered cumulus, scattered cirrostratus
Temperature: 74F; Dew Point: 44F; Wind: estimated NE at 5 kts,
Wind: Light and variable
Sea-level pressure: 29.99 in. Hg, rising, then more slowly
Visibility: 70 miles
6-hr Max temp: 75F
6-hr Min temp: 65F
BHO SA 1755 44 SCT 250 SCT 156/74/44/E0505/999/ WND L/V/
8/108 51005 10075 20065

SUMMARY FOR THURSDAY, JUNE 16, 2016

TEMPERATURE (DEGREES F)
MAX…..82   NORMAL…..75
MIN…..62   NORMAL…..57
MEAN….72   NORMAL…..66

DEPARTURE FROM 30-YEAR NORMAL…………………….+6
TOTAL DEPARTURE FOR THE MONTH……………………+14 [+0.7 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………0   DEPARTURE……….-2
TOTAL HEATING UNITS FOR THE MONTH…………..34   DEPARTURE………-22
TOTAL HEATING UNITS FOR THE SEASON………..5282   DEPARTURE…….-1077
TOTAL HEATING UNITS LAST SEASON TO DATE……6490   DIFFERENCE……-1208

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………7   DEPARTURE……….+3
TOTAL COOLING UNITS FOR THE MONTH…………..33   DEPARTURE……….-7
TOTAL COOLING UNITS FOR THE SEASON………….81   DEPARTURE………+17
TOTAL COOLING UNITS LAST SEASON TO DATE……..90   DIFFERENCE………-9

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….26 E  AT  11:56 P.M.
ASOS……………………27 E  AT  11:56 P.M.
DAVIS…………………..26 E  AT  11:56 P.M. RMY 27
FASTEST MILE FOR YESTERDAY…………………20 E  AT  11:55 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………20 E  AT  11:56 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..19 E  AT  11:59 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..4.7 N
ASOS…………………..4.9
DAVIS………………….4.4 SE [130 Deg.] * Last of several occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.15
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….1.05  DEPARTURE……-1.53
ASOS…………..1.08
TOTAL PRECIPITATION FOR THE YEAR……….21.12  DEPARTURE……-4.12
ASOS………….21.52

PRELIMINARY CLIMATE SUMMARY FOR JUNE 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

6/1  71/54/63/+1/0.00/860/95                 26 NE  AERO 30 NE  RMY N/A
6/2  68/54/61/-1/0.00/444/49                 21 NE  AERO 22 NE  RMY 21
6/3  70/57/64/+2/T/173/19                    16 SSW AERO 17 SSW RMY 16
6/4  81/61/71/+8/0.00/491/54                 18 S   AERO 21 S   RMY 20
6/5  67/60/64/+1/0.76/000/00                 32 SSE AERO 36 SSE RMY 34
6/6  80/63/72/+9/0.00/747/82                 26 W   AERO 28 W   RMY 27
6/7  83/58/71/+7/0.18/602/66                 32 WNW AERO 36 WNW RMY 33 TSTM
6/8  72/52/62/-2/0.05/684/75                 37 WNW AERO 41 WNW RMY 38
6/9  67/48/58/-6/0.00/466/51                 41 WNW AERO 45 WNW RMY 40
6/10 71/50/61/-4/0.00/841/92                 25 W   AERO 28 W   RMY 26
6/11 68/52/60/-5/0.06/…/..                 30 SSW AERO 35 SSW RMY 31
6/12 76/51/64/-1/T/…/..                    41 W   AERO 48 W   RMY 42
6/13 70/49/60/-5/0.00/…/..                 36 NW  AERO 46 NW  RMY 38
6/14 77/50/64/-2/0.00/…/..                 32 NNW AERO 38 NNW RMY 33
6/15 83/60/72/+6/0.00/…/..                 22 NW  AERO 26 NW  RMY 25
6/16 82/62/72/+6/0.00/…/..                 26 E   AERO 28 E   RMY 27

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

DAILY RECORDS FOR JUNE 2016
None so far

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: Cecilia Borries-Strigle