Friday, June 23, 2017
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, JUNE 23, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME
FAST MOVING DISTANT THUNDERSTORMS WITH CLOUD TO GROUND LIGHTNING
Today has been a partly cloudy day with mostly mixtures of cirrus and
cumulus with towering cumulus forming into cumulonimbus just before the
1:00 PM observation. A few cumulonimbus were seen over Boston NNW of
Great Blue Hill with distant cloud to ground lightning. We did not
receive precipitation during this thunderstorm.
Winds coming from the south started out light then picked up once low
pressure from tropical storm Cindy moved onto Great Blue Hill. We had
a peak gust of 29 kts (33 MPH) just after the 1:00 PM observation.
The day started off very humid and sticky but dropped through out the
day. Temperatures were above normal with a high of 88F by 1 PM,
normal is 77F.
Today’s Observations:
7 A.M.
Weather: Broken altocumulus,broken cirrostratus
Temperature: 70F; Dew Point: 66F; Wind: S at 8 kts
Sea-level pressure: 29.83 ins. Hg, rising, then falling
Visibility: 35 miles hazy
6-hr Max temp: 71F
6-hr Min temp: 66F
24-hr precip: 0.00 in.
BHO SA 1155 E70 BKN E250 BKN 35 100/70/66/1908/983/
HAZY 8/066 50001 10071 20066
10 A.M.
Weather: Broken altocumulus,broken cirrostratus,few cumulus SSW-NE
Temperature: 79F; Dew Point: 77F; Wind: S at 10 kts
Sea-level pressure: 29.80 ins. Hg, falling, then more rapidly
Visibility: 20 miles hazy
BHO SA 1455 E10 BKN E150 BKN 20 091/79/77/1910/980/
FEW CU SSW-NE HAZY 8/177 58009
1 P.M.
Weather: Distant occasional cloud to ground lightning, broken
cirrostratus,
few cumulus SSW-N,few cumulonimbus NNW-N
Temperature: 86F; Dew Point: 70F; Wind: S at 17G24 kts
Peak Wind: 26 kts (30 MPH) S at 12:51 PM EST
Sea-level pressure: 29.72 ins. Hg, falling, then more rapidly
Visibility: 20 miles
6-hr Max temp: 88F
6-hr Min temp: 70F
BHO SA 1755 E250 BKN 20 064/86/70/1817G24/972/ FEW CU SSW-N
FEW CB NNW-N DSNT OCNL LTGCG NNW-N PK WND 18026/51/ 8/306
58027 10088 20070
SUMMARY FOR THURSDAY, JUNE 22, 2017
TEMPERATURE (DEGREES F)
MAX…..83 NORMAL…..77
MIN…..59 NORMAL…..59
MEAN….71 NORMAL…..68
DEPARTURE FROM 30-YEAR NORMAL…………………….+3
TOTAL DEPARTURE FOR THE MONTH……………………+33 [+1.6 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………0 DEPARTURE……….-3
TOTAL HEATING UNITS FOR THE MONTH…………..62 DEPARTURE……….-4
TOTAL HEATING UNITS FOR THE SEASON………..5724 DEPARTURE……..-645
TOTAL HEATING UNITS LAST SEASON TO DATE……5282 DIFFERENCE…….+442
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………6 DEPARTURE……….+2
TOTAL COOLING UNITS FOR THE MONTH…………..96 DEPARTURE………+32
TOTAL COOLING UNITS FOR THE SEASON…………152 DEPARTURE………+64
TOTAL COOLING UNITS LAST SEASON TO DATE…….101 DEPARTURE………+41
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….23 W AT 3:11 p.M.
AERO……………………22 W AT 2:58 P.M.
ASOS……………………23 W AT 3:00 P.M.
DAVIS…………………..20 W AT 2:59 P.M. RMY 21
FASTEST MILE FOR YESTERDAY…………………15 W AT 3:00 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………16 SW AT 11:39 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..15 W AT 3:13 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..9.1 W
ASOS…………………..9.8
DAVIS………………….7.7 W [263 DEG.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00 DEPARTURE……-0.12
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….5.62 DEPARTURE……+2.23
ASOS…………..5.69
TOTAL PRECIPITATION FOR THE YEAR……….30.96 DEPARTURE……+4.91
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 70/56/63/-3/2.14/…/.. 28 S AERO 29 S RMY N/A
6/17 70/58/64/-3/0.01/000/00 18 S AERO 18 S RMY N/A
6/18 82/65/74/+7/T/…/.. 33 SSW*AERO 35 SSW RMY 37
6/19 82/67/75/+8/…./…/.. 40 S AERO 43 S RMY 43
6/20 84/66/75/+7/…./…/.. 38 SW AERO 44 SW RMY 40
6/21 83/64/74/+6/0.00/…/.. 29 W AERO 30 W RMY 30
6/22 83/59/71/+6/…/…/.. 23 W AERO 22 W RMY 21
6/23 Low temp since midnight is 66F; normal low is now 59F
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 23
HIGH 93F IN 1888
LOW 45F IN 1885
PRECIP 0.70 INS IN 2006
PEAK GUST 63 MPH SE IN 1972 (AGNES)
RECORDS FOR JUNE 24
HIGH 91F IN 1914,1976,2013
LOW 40F IN 1932
PRECIP 2.80 INS IN 1929
PEAK GUST 54 MPH WNW IN 2010
TODAY’S REPORT PREPARED BY: Kaitlin Ann Geagan
