Monday, June 20, 2016

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, JUNE 20, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME

HUMIDITY INCREASES PRECEDING COLD FRONT

Today had mostly sunny skies with scattered cirrus.  Few cumulus
were building in the west at the 1:00PM EST observation.  Visibility
was lower than previous days at just 40 miles due to distant haze.

Temperatures reached 80F by 1:00PM after a morning low of 57F.
Dew points remained near 60F resulting in relative humidities ranging
50%-75%.

Today’s Observations:

7 A.M.
Weather: Scattered cirrus
Temperature: 66F; Dew Point: 58F; Wind: SSW at 10 kts
Sea-level pressure: 30.23 in. Hg, rising, then falling
Visibility: 40 miles, distant haze
6-hr Max temp: 66F
6-hr Min temp: 57F
24-hr precip: 0.00 in.
BHO SA 1155 250 SCT 40 236/66/58/2010/023/ DSNT HZ/ 8/002 58002 10066 20057

10 A.M.
Weather: Scattered cirrus
Temperature: 75F; Dew Point: 60F; Wind: SSW at 12 kts
Sea-level pressure: 30.18 in. Hg, falling, then more quickly
Visibility: 40 miles, distant haze
BHO SA 1455 250 SCT 40 221/75/60/2012/018/ DSNT HZ/ 8/002 58015

1 P.M.
Weather: Few cumulus WSW-NW, scattered cirrus
Temperature: 80F; Dew Point: 60F; Wind: S at 14G18 kts
Sea-level pressure: 30.10 in. Hg, falling, then more quickly
Visibility: 40 miles, distant haze
6-hr Max temp: 80F
6-hr Min temp: 65F
BHO SA 1755 250 SCT 10 194/80/60/1814G18/010/ FEW CU WSW-NW DSNT HZ/
8/102 58027 10080 20065

SUMMARY FOR SUNDAY, JUNE 19, 2016

TEMPERATURE (DEGREES F)
MAX…..79   NORMAL…..76
MIN…..55   NORMAL…..58
MEAN….67   NORMAL…..67

DEPARTURE FROM 30-YEAR NORMAL……………………..0
TOTAL DEPARTURE FOR THE MONTH……………………+13 [+0.5 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………-28
TOTAL HEATING UNITS FOR THE SEASON………..5282   DEPARTURE…….-1083
TOTAL HEATING UNITS LAST SEASON TO DATE……6491   DIFFERENCE……-1209

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………2   DEPARTURE……….-2
TOTAL COOLING UNITS FOR THE MONTH…………..38   DEPARTURE………-13
TOTAL COOLING UNITS FOR THE SEASON………….86   DEPARTURE………+11
TOTAL COOLING UNITS LAST SEASON TO DATE……..97   DIFFERENCE……..-11

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….32 S  AT  5:21 P.M.*
ASOS……………………35 S  AT  5:07 P.M.
DAVIS…………………..35 S  AT  5:06 P.M. RMY 36
FASTEST MILE FOR YESTERDAY…………………25 S  AT  5:06 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………24 S  AT  5:30 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..23 S  AT  5:10 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..14.1 S
ASOS…………………..14.0
DAVIS………………….12.9 S [180 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……-1.96
ASOS…………..1.08
TOTAL PRECIPITATION FOR THE YEAR……….21.12  DEPARTURE……-4.55
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 TSTM
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 77/59/68/+1/T/…/..                    25 E   AERO 28 E   RMY 23 TSTM
6/18 75/55/65/-2/0.00/…/..                 22 SSW AERO 24 SSE RMY N/A
6/19 79/55/67/+0/0.00/…/..                 32 S   AERO 35 S   RMY 36

6/20 low temp since midnight is 57F; normal low now 59F

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 20
HIGH 94F IN 1953
LOW 41F IN 1918
PRECIP 2.62 INS 1945
PEAK GUST 63 MPH NE IN 1967, SSW IN 2010

RECORDS FOR JUNE 21
HIGH 94F IN 2012
LOW 42F IN 1940
PRECIP 1.40 INS 1903
PEAK GUST 51 MPH SSW IN 2000

TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle