Tuesday, June 13, 2017

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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, JUNE 13, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME

HOT AND HUMID CONDITIONS CONTINUE

Temperatures continued to rise yesterday afternoon reaching
94F which broke the previous record of 92F set in 1973.
Yesterday’s minimum temperature of 69F tied for the high
minimum record first set in 1942. Hot temperatures continued
today measuring 92F, one degree short of today’s record of
93F set back in 1988. A cold front moving into the region
from the northwest this afternoon is expected to bring cooler
temperatures, scattered rain showers, and possible thunderstorms.

Haze limited visibility to 20 miles all day due to the poor air
quality and high dew points. Dew points remained in the upper
60s all morning and early afternoon.
Today’s Observations:

7 A.M.
Weather: Scattered cirrus
Temperature: 77F; Dew Point: 64F; Wind: W at 12 kts
Sea-level pressure: 29.88 ins. Hg, falling unsteadily
Visibility: 20 miles, hazy
6-hr Max temp: 77F
6-hr Min temp: 72F
24-hr precip: 0.00 in.
BHO SA 1155 250 SCT 20 120/77/64/2712/988/ HAZY/ 8/001 57002 10077 20072

10 A.M.
Weather: Few cirrus in all directions
Temperature: 88F; Dew Point: 68F; Wind: WSW at 7 kts
Sea-level pressure: 29.86 ins. Hg, rising then falling
Visibility: 20 miles, hazy
BHO SA 1455 CLR 20 113/88/68/2407/986/ FEW CI ALQDS HAZY/ 8/001 58007

1 P.M.
Weather: Scattered cumulus, scattered cirrus
Temperature: 91F; Dew Point: 67F; Wind: W at 14G20 kts
Sea-level pressure: 29.82 ins. Hg, falling, then more slowly
Visibility: 20 miles, hazy
6-hr Max temp: 92F
6-hr Min temp: 77F
BHO SA 1755 49 SCT 250 SCT 20 097/91/67/2614G20/982/ HAZY/
8/101 56016 10092 20077

SUMMARY FOR MONDAY, JUNE 12, 2017

TEMPERATURE (DEGREES F)
MAX…..94   NORMAL…..74
MIN…..69   NORMAL…..56
MEAN….82   NORMAL…..65

DEPARTURE FROM 30-YEAR NORMAL……………………+17
TOTAL DEPARTURE FOR THE MONTH…………………….-3 [-0.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………0   DEPARTURE……….-3
TOTAL HEATING UNITS FOR THE MONTH…………..59   DEPARTURE………+13
TOTAL HEATING UNITS FOR THE SEASON………..5721   DEPARTURE……..-628
TOTAL HEATING UNITS LAST SEASON TO DATE……5276   DIFFERENCE…….+445

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..17   DEPARTURE………+14
TOTAL COOLING UNITS FOR THE MONTH…………..38   DEPARTURE………+11
TOTAL COOLING UNITS FOR THE SEASON………….94   DEPARTURE………+43
TOTAL COOLING UNITS LAST SEASON TO DATE……..67   DEPARTURE………+27

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….28 W AT 2:18 P.M.
AERO……………………29 W AT 2:19 P.M.
ASOS……………………29 W AT 2:19 P.M.
DAVIS…………………..27 W AT 2:18 P.M. RMY 28
FASTEST MILE FOR YESTERDAY…………………20 W AT 2:02 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………20 W AT 2:19 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..19 W AT 2:19 P.M.
AVERAGE WIND SPEED AND DIRECTION………….11.3 WSW
ASOS………………….11.3
DAVIS………………….9.8 WSW [235 DEG.]

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……….3.12  DEPARTURE……+1.15
ASOS…………..3.20
TOTAL PRECIPITATION FOR THE YEAR……….28.46  DEPARTURE……+3.83
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/…/..               39 NW  AERO 39 NW  RMY 41
6/2  70/50/60/-2/T/…/..                  32 WNW AERO 35 WNW RMY 34
6/3  66/47/57/-5/0.01/…/..               23 NW  AERO 25 NW  RMY 24
6/4  71/49/60/-3/0.28/…/..               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/…./000/00              40 ENE AERO 43 ENE RMY 43
6/7  65/47/56/-8/…./…/..               21 NNE AERO 18 NE* RMY 20
6/8  76/52/64/0/0.00/…/..                21 SSE AERO 21 SSE RMY 18
6/9  78/53/66/+2/0.16/…/..               48 N   AERO 54 N   RMY 52 TSTM
6/10 83/59/71/+6/0.00/…/..               25 SSW AERO 28 SSW RMY 27
6/11 89/64/77/+12/0.00/…/..              29 SW  AERO 32 WSW RMY 30
6/12 94/69/82/+17/0.00/…/..              28 W   AERO 29 W   RMY 28

6/13 Low temp since midnight is 72F; normal low is now 56F

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

RECORDS FOR JUNE 14
HIGH 93F IN 1956
LOW 41F IN 1912
PRECIP 1.49 INS 1896
PEAK GUST 55 MPH WNW IN 1958

TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle/Nicholas Rousseau