Thursday, June 9, 2016

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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, JUNE 9, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME

STRONG LOW PRESSURE BRINGS MOSTLY CLOUDY SKIES, COOL TEMPS, AND
GUSTY WESTERLY WINDS

Temperatures were much cooler today due to a strong low pressure system
over the region.  The overnight low of 48F is 7F below average.  A
maximum temp. of 65F was recorded at the 1PM EST observation, which is
8F below average.

Winds were stronger today compared to the first part of the week.  A peak
gust of 41 MPH (36 kts) occurred at 12:01PM EST.

Today’s Observations:

7 A.M.
Weather: Broken stratocumulus, scattered cirrocumulus, few distant
cumulus NE-SE
Temperature: 55F; Dew Point: 44F; Wind: W at 14G21 kts
Sea-level pressure: 29.65 ins. Hg, rising, then steady
Visibility: 40 miles
6-hr Max temp: 55F
6-hr Min temp: 48F
24-hr precip: 0.05 in.
BHO SA 1155 E38 BKN 140 SCT 40 042/55/44/2814G21/965/ FEW CU DSNT NE-SE/
8/509 51006 ASOS 70006 MANUAL 70005 10055 20048

10 A.M.
Weather: Broken stratocumulus
Temperature: 59F; Dew Point: 41F; Wind: WNW at 18G30 kts,
Peak Wind: WNW at 31 kts at 9:14AM EST
Sea-level pressure: 29.65 ins. Hg, falling, then rising
Visibility: 40 miles, distant haze
BHO SA 1455 E43 BKN 40 040/59/41/3018G30/965/ DSNT HZ PK WND 3031/14/
8/500 55002

1 P.M.
Weather: Broken stratocumulus
Temperature: 63F; Dew Point: 43F; Wind: WNW at 17G31 kts,
Peak Wind: WNW at 36 kts at 12:01PM EST
Sea-level pressure: 29.63 ins. Hg, falling, then rising
Visibility: 40 miles, distant haze
6-hr Max temp: 65F
6-hr Min temp: 54F
BHO SA 1755 E54 BKN 40 033/63/43/3017G31/963/ DSNT HZ PK WND 3036/01/
8/500 55007 10065 20054

SUMMARY FOR WEDNESDAY, JUNE 8, 2016

TEMPERATURE (DEGREES F)
MAX…..72   NORMAL…..73
MIN…..52   NORMAL…..55
MEAN….62   NORMAL…..64

DEPARTURE FROM 30-YEAR NORMAL…………………….-2
TOTAL DEPARTURE FOR THE MONTH……………………+25 [+2.9 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………3   DEPARTURE……….-1
TOTAL HEATING UNITS FOR THE MONTH…………..11   DEPARTURE………-22
TOTAL HEATING UNITS FOR THE SEASON………..5259   DEPARTURE…….-1077
TOTAL HEATING UNITS LAST SEASON TO DATE……6482   DIFFERENCE……-1223

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………0   DEPARTURE……….-2
TOTAL COOLING UNITS FOR THE MONTH…………..19   DEPARTURE……….+3
TOTAL COOLING UNITS FOR THE SEASON………….67   DEPARTURE………+27
TOTAL COOLING UNITS LAST SEASON TO DATE……..49   DIFFERENCE……..+18

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….37 WNW AT  6:12 P.M.
ASOS……………………37 WNW AT  6:12 P.M.
DAVIS…………………..33 WNW AT  6:49 P.M. RMY 38
FASTEST MILE FOR YESTERDAY…………………25 WNW AT  3:46 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………25  W  AT 11:07 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..23 WNW AT  3:46 P.M.
AVERAGE WIND SPEED AND DIRECTION………….15.8 W
ASOS………………….15.6
DAVIS…………………13.1 W [280 Deg.] * Last of several occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.05  DEPARTURE……-0.12
ASOS…………..0.06
TOTAL PRECIPITATION FOR THE MONTH……….0.99  DEPARTURE……-0.34
ASOS…………..1.02
TOTAL PRECIPITATION FOR THE YEAR……….21.06  DEPARTURE……-2.93
ASOS………….21.46

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/…/..                 26 NE  AERO 30 NE  RMY N/A
6/2 68/54/61/-1/0.00/…/..                 21 NE  AERO 22 NE  RMY 21
6/3 70/57/64/+2/T/…/..                    16 SSW AERO 17 SSW RMY 16
6/4 81/61/71/+8/0.00/…/..                 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/…/..                 26 W   AERO 28 W   RMY 27
6/7 83/58/71/+7/0.18/…/..                 32 WNW AERO 36 WNW RMY 33 TSTM
6/8 72/52/62/-2/0.05/…/..                 37 WNW AERO 41 WNW RMY 38

6/9 low temp since midnight is 48F; normal low now 55F

* Last of several occurrences

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 9
HIGH 94F IN 2008
LOW 40F IN 1980
PRECIP 2.08 INCHES IN 1931
PEAK GUST 67 MPH NW IN 1973

RECORDS FOR JUNE 10
HIGH 98F IN 2008
LOW 42F IN 1913,1920
PRECIP 2.51 INCHES IN 1931
PEAK GUST 60e MPH NW IN 1941

TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle