Friday, June 16, 2017

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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, JUNE 16, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME

MORE HUMID WEATHER ARRIVES, SKIES TURN MOSTLY CLOUDY

Moisture has increased ahead of an approaching warm front.
Dew points increased to the mid 50s this afternoon, and
skies were mostly cloudy with multiple levels of broken or
overcast cloud layers spotted at each observation.
Visibility decreased from 70 miles to 35 miles as distant
fog moved in during the day.  No precip. had fallen at BHO
by 1:00PM EST.

Today’s Observations:

7 A.M.
Weather: Few cumulus ESE-N, broken stratus, broken cirrostratus
Temperature: 61F; Dew Point: 51F; Wind: SSE at 14G20 kts
Sea-level pressure: 30.11 ins. Hg, falling unsteadily
Visibility: 70 miles, except 50 miles WSW-ENE
6-hr Max temp: 62F
6-hr Min temp: 58F
24-hr precip: 0.00 in.
BHO SA 1155 E64 BKN 200 BKN 70 195/61/51/1614G20/011/ FEW CU ESE-N
VSBY WSW-ENE 50/ 8/606 57002 10062 20058

10 A.M.
Weather: Broken stratocumulus, broken altostratus, broken cirrus
Temperature: 67F; Dew Point: 55F; Wind: S at 9G16 kts
Sea-level pressure: 30.08 ins. Hg, falling, then more slowly
Visibility: 40 miles
BHO SA 1455 E25 BKN 140 BKN 250 BKN 40 186/67/55/1709G16/008/
8/511 56009

1 P.M.
Weather: Broken stratocumulus, overcast stratus
Temperature: 67F; Dew Point: 55F; Wind: SE at 8G15 kts
Sea-level pressure: 30.06 ins. Hg, falling unsteadily
Visibility: 35 miles, distant fog in all directions
6-hr Max temp: 70F
6-hr Min temp: 61F
BHO SA 1755 E36 BKN 64 OVC 35 178/67/55/140815/006/ DSNT FG ALQDS/
8/6// 57008 10070 20061

SUMMARY FOR THURSDAY, JUNE 15, 2017

TEMPERATURE (DEGREES F)
MAX…..75   NORMAL…..75
MIN…..54   NORMAL…..57
MEAN….65   NORMAL…..66

DEPARTURE FROM 30-YEAR NORMAL…………………….-1
TOTAL DEPARTURE FOR THE MONTH……………………+12 [+0.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………0   DEPARTURE……….-2
TOTAL HEATING UNITS FOR THE MONTH…………..59   DEPARTURE……….+5
TOTAL HEATING UNITS FOR THE SEASON………..5721   DEPARTURE……..-635
TOTAL HEATING UNITS LAST SEASON TO DATE……5282   DIFFERENCE…….+439

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………0   DEPARTURE……….-3
TOTAL COOLING UNITS FOR THE MONTH…………..55   DEPARTURE………+18
TOTAL COOLING UNITS FOR THE SEASON…………111   DEPARTURE………+50
TOTAL COOLING UNITS LAST SEASON TO DATE……..74   DEPARTURE………+37

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….25 SSW AT 4:43 P.M.
AERO……………………29  S  AT 2:23 P.M.
ASOS……………………29 SSW AT 4:44 P.M.
DAVIS…………………..31 SSW AT 4:43 P.M. RMY 30
FASTEST MILE FOR YESTERDAY…………………20 SSW AT 4:32 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………21  S  AT 6:17 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..19  S  AT 4:45 P.M.
AVERAGE WIND SPEED AND DIRECTION………….11.5  S
ASOS………………….11.3
DAVIS………………….9.7  S [190 DEG.]

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……….3.17  DEPARTURE……+0.74
ASOS…………..3.23
TOTAL PRECIPITATION FOR THE YEAR……….28.51  DEPARTURE……+3.42
ASOS……………N/A ***
*** ASOS annual total not available due to erroneous readings

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
M:    Missing data

6/1  78/55/67/+5/0.06/706/78               39 NW  AERO 39 NW  RMY 41
6/2  70/50/60/-2/T/652/72                  32 WNW AERO 35 WNW RMY 34
6/3  66/47/57/-5/0.01/472/52               23 NW  AERO 25 NW  RMY 24
6/4  71/49/60/-3/0.28/490/54               21 SSE*AERO 21 SW  RMY N/A
6/5  55/49/52/-11/1.20/000/00              32 NE  AERO 35 NE  RMY N/A
6/6  49/45/47/-16/1.36/000/00              40 ENE AERO 43 ENE RMY 43
6/7  65/47/56/-8/0.05/519/57               21 NNE AERO 18 NE* RMY 20
6/8  76/52/64/0/0.00/602/66                21 SSE AERO 21 SSE RMY 18
6/9  78/53/66/+2/0.16/438/48               48 N   AERO 54 N   RMY 52 TSTM
6/10 83/59/71/+6/0.00/722/79               25 SSW AERO 28 SSW RMY 27
6/11 89/64/77/+12/0.00/704/77              29 SW  AERO 32 WSW RMY 30
6/12 94/69/82/+17/0.00/851/93              28 W   AERO 29 W   RMY 28
6/13 92/67/80/+15/0.03/…/..              25 W   AERO 28 WNW RMY 28
6/14 78/56/67/+1/0.02/…/..               20 S   AERO 20 S   RMY 20
6/15 75/54/65/-1/0.00/…/..               25 SSW AERO 29 S   RMY 30

6/16 Low temp since midnight is 58F; normal low is now 57F

DAILY RECORDS FOR JUNE

6/12/17: DAILY RECORD MAXIMUM TEMPERATURE OF 94F,
BREAKS PREVIOUS RECORD OF 92F SET IN 1973

6/12/17: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 69F,
TIES PREVIOUS RECORD SET IN 1942

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

RECORDS FOR JUNE 16
HIGH 92F IN 1891, 1967
LOW 44F IN 1926
PRECIP 2.17 INS IN 1931
PEAK GUST 55 MPH W IN 1958

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

TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle