Friday, June 12, 2015

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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, JUNE 12, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME

HOT, HUMID CONDITIONS CONTINUE AS HAZE EASES

Yesterday’s warmer than normal maximum of 85F and
high dew points in the mid 60s have returned today,
with slightly drier air in place today. Haze, which
limited visibility to less than 10 miles yesterday
has been reduced today, along with a slowly rising
barometer.

By this morning’s 10:00 AM EST observation, temperatures
were climbing steadily through the 70s with mostly
cloudy conditions. Cirrocumulus and cirrus were in place
with occasionally calm winds.

Today’s Observations:

7 A.M.
Weather: Broken altocumulus, broken cirrostratus
Temperature: 68F; Dew Point: 55F; Wind: NNW at 7 kts
Sea-level pressure: 30.01 ins. Hg, rising, then more slowly
Visibility: 50 miles, hazy
6-hr Max temp: 69F
6-hr Min temp: 65F
24-hr precip: 0.00
BHO SA 1155 E160 BKN 250 BKN 50 162/68/55/3407/001/
HAZY/ 8/058 51010 10069 20065

10 A.M.
Weather: Thin broken cirrus/cirrostratus, few cirrocumulus
in all directions
Temperature: 77F; Dew Point: 56F; Wind: estimated S at 3 kts,
Wind Speed: Light
Sea-level pressure: 30.01 ins. Hg, rising slightly
Visibility: 40 miles, hazy
BHO SA 1455 E250 -BKN 40 164/77/56/E1803/001/
FEW CC ALQDS HAZY WND LGT/ 8/008 50002

SUMMARY FOR THURSDAY, JUNE 11, 2015

TEMPERATURE (DEGREES F)
MAX…..85   NORMAL…..74
MIN…..61   NORMAL…..56
MEAN….73   NORMAL…..65

DEPARTURE FROM 30-YEAR NORMAL……………………+8
TOTAL DEPARTURE FOR THE MONTH…………………..-48 [-4.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………0  DEPARTURE………..-3
TOTAL HEATING UNITS FOR THE MONTH…………..78  DEPARTURE……….+35
TOTAL HEATING UNITS FOR THE SEASON………..6482  DEPARTURE………+136
TOTAL HEATING UNITS LAST SEASON TO DATE……6417  DIFFERENCE………+65

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..8   DEPARTURE……….+5
TOTAL COOLING UNITS FOR THE MONTH………….17   DEPARTURE……….-7
TOTAL COOLING UNITS FOR THE SEASON…………66   DEPARTURE………+18
TOTAL COOLING UNITS LAST SEASON TO DATE…….39   DIFFERENCE……..+27

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………29  SSW  AT   2:14 A.M. *
ASOS…………………..32  W    AT   2:02 P.M.
DAVIS………………….31  SW   AT   2:37 A.M. RMY 32
FASTEST MILE FOR YESTERDAY………………..23  SSW  AT   2:07 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..24  SSW  AT   2:15 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….23  SSW  AT   2:15 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..14.8 SSW
ASOS…………………..14.4
DAVIS………………….13.3 SW [233 deg.] * Last of several occurrences…

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…..0.00   DEPARTURE….-0.16
ASOS……………0.00
TOTAL PRECIPITATION FOR THE MONTH………..1.58   DEPARTURE….-0.23
ASOS……………1.60
TOTAL PRECIPITATION FOR THE YEAR………. 20.95   DEPARTURE….-3.39                         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/…/..              16 ESE RMY 16
6/4  63/46/55/-8/0.00/…/..               17 E   RMY 16
6/5  70/49/60/-3/T/…/..                  17 NNE RMY 17
6/6  65/52/59/-4/0.06/…/..               26 ENE RMY 27
6/7  73/49/61/-3/0.00/…/..               28 S   RMY 29
6/8  73/50/62/-2/T/…/..                  41 SSW RMY 48
6/9  76/61/69/+4/0.03/…/..               29 SSW RMY 32
6/10 82/57/70/+5/0.00/…/..               24 WSW RMY N/A
6/11 85/61/73/+8/0.00/…/..               29 SSW RMY 32

6/12 low since midnight is 65F; normal low is now 56F

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 12
HIGH 92F IN 1973
LOW 40F IN 1906
PRECIP 1.79 INS 1955
PEAK GUST 58 MPH NW IN 1991

RECORDS FOR JUNE 13
HIGH 93F IN 1988
LOW 43F IN 1982
PRECIP 6.07 INS 1998 [Record for month] PEAK GUST 69 MPH N IN 1956

TODAY’S REPORT PREPARED BY: Brian Fitzgerald