Saturday, July 1, 2017

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, JULY 1, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME

PARTLY CLOUDY AND HUMID DAY

Humid air once again remained on top of Great Blue Hill because the wind has
been coming from the south/ southwest. We had partly cloudy skies today with
a mixture of cumulus and altocumulus with a few towering cumulus spotted during
the 7 A.M. observation.

Temperatures have been above normal with a high today of 85F by 1:00 P.M.
The normal temperature being 79F. EST. An evening rainstorm left 0.11 in.
of precipitation and ended before midnight. 0.11 in. of precipitation is
the daily climatological normal. As Southerly winds continues a distant
haze has persisted in the region especially to the west. Wind increased
in the afternoon with a peak gust of 30 kts (35 MPH) by 3:00 P.M. EST.

PRELIMINARY STATS FOR JUNE 2017

TEMPERATURE, Deg. F
Avg. Max. 77.2 [+2.2] Avg. Min. 57.8 [+0.7] Mean      67.5 [+1.4] 24-hour corrected mean: 67.0
Max. for month: 96F on  12th
Min. for month: 45F on  6th

HEATING DEGREE DAYS
Total heating units: 60 [-13] Total for the season: 5725 [-651] Total for last season: 5282

COOLING DEGREE DAYS
Total cooling units: 145 [+40] Total for the season: 201 [+72] Total for last season: 157

PRECIPITATION, Inches
Total: 6.03 [+1.72] Greatest in 24 hrs: 2.19 in on 5th-6th

WIND, mph
Avg. uncorrected wind speed: 11.7
Avg. corrected wind speed: 12.1
Prevailing wind direction: W at 15%
Peak gust and direction: 48 N on 9th

SUNSHINE:
Campbell-Stokes card minutes: N/A
Astronomical total minutes: N/A

Today’s Observations:

7 A.M.
Weather: Few cumulus all directions, few towering cumulus SSW-W,
scattered altocumulus
Temperature: 71F; Dew Point: 69F; Wind: SSW at 8 kts
Sea-level pressure: 30.01 ins. Hg, rising unsteadily
Visibility: 15 miles, distant fog in all directions
6-hr Max temp: 71F
6-hr Min temp: 67F
24-hr precip: 0.11 in.
BHO SA 1155 80 SCT 15 162/71/69/2008/001/ FEW CU ALQDS
FEW TCU SSW-W DSNT FG ALQDS/ 8/280 MANUAL 70011 ASOS 70012 52016
10071 20067

10 A.M.
Weather: Scattered cumulus, scattered altocumulus
Temperature: 82F; Dew Point: 71F; Wind: S at 11G19 kts
Sea-level pressure: 30.01 ins. Hg, steady then falling
Visibility: 40 miles, distant haze W-NW
BHO SA 1455 70 SCT 120 SCT 30 155/82/71/1911G19/999/ DSNT HZ W-NW/
8/270 58007

1 P.M.
Weather: Scattered cumulus, broken altocumulus
Temperature: 82F; Dew Point: 72F; Wind: S at 15G23 kts,
Peak Wind: 24 kts (28 MPH) at 12:14 P.M. EST
Sea-level pressure: 29.96 ins. Hg,falling then, more quickly
Visibility: 40 miles, distant haze WSW-NW
6-hr Max temp: 85F
6-hr Min temp: 71F
BHO SA 1755 40 SCT E80 BKN 40 144/82/72/1915G23/996/ DSNT HZ WSW-NW PK
WND 1924/14/ 8/290 56011 10085 20071

SUMMARY FOR FRIDAY, JUNE 30, 2017

TEMPERATURE (DEGREES F)
MAX…..82   NORMAL…..79
MIN…..65   NORMAL…..61
MEAN….74   NORMAL…..70

DEPARTURE FROM 30-YEAR NORMAL…………………….+4
TOTAL DEPARTURE FOR THE MONTH…………………….+4 [+3.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………0   DEPARTURE……….-3
TOTAL HEATING UNITS FOR THE MONTH…………..63   DEPARTURE………-10
TOTAL HEATING UNITS FOR THE SEASON………..5725   DEPARTURE……..-651
TOTAL HEATING UNITS LAST SEASON TO DATE……5282   DIFFERENCE…….+443

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………9   DEPARTURE……….+3
TOTAL COOLING UNITS FOR THE MONTH………….145   DEPARTURE………+40
TOTAL COOLING UNITS FOR THE SEASON…………201   DEPARTURE………+72
TOTAL COOLING UNITS LAST SEASON TO DATE…….157   DEPARTURE………+44

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….30 SSW AT  8:04 P.M.
AERO……………………32 SSW AT  8:03 P.M.
ASOS……………………33 S   AT  8:04 P.M.
DAVIS…………………..33 SSW AT  9:04 P.M. RMY 32
FASTEST MILE FOR YESTERDAY…………………25 SSW AT  9:03 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………24 SSW AT  9:04 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..24 SSW AT  8:20 P.M.
AVERAGE WIND SPEED AND DIRECTION………….15.8 SSW
ASOS………………….16.0
DAVIS…………………14.6 SSW [204 DEG.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.11  DEPARTURE…….0.00
ASOS…………..0.12
TOTAL PRECIPITATION FOR THE MONTH……….6.03  DEPARTURE……+1.72
ASOS…………..5.98
TOTAL PRECIPITATION FOR THE YEAR……….31.37  DEPARTURE……+4.40
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/+15/0.03/796/87              25 W   AERO 28 WNW RMY 28
6/14 78/56/67/+1/0.02/889/97               20 S   AERO 20 S   RMY 20
6/15 75/54/65/-1/0.00/870/95               25 SSW AERO 29 S   RMY 30
6/16 70/56/63/-3/2.14/073/08               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/394/43                  33 SSW*AERO 35 SSW RMY 37
6/19 82/67/75/+8/0.05/312/34               40 S   AERO 43 S   RMY 43
6/20 84/66/75/+7/0.25/651/71               38 SW  AERO 44 SW  RMY 40
6/21 83/64/74/+6/0.00/734/80               29 W   AERO 30 W   RMY 30
6/22 83/59/71/+3/0.00/779/85               23 W   AERO 22 W   RMY 21
6/23 88/66/77/+9/0.00/…/..               33 S   AERO 36 S   RMY 36
6/24 84/68/76/+7/0.19/…/..               28 WNW AERO 31 WNW RMY 32
6/25 83/61/72/+3/T/…/..                  29 WNW AERO 35 WNW RMY 34
6/26 79/57/68/-1/0.00/…/..               24 W   AERO 24 W   RMY 23
6/27 74/55/65/-4/0.11/…/..               43 S   AERO 45 S   RMY 45
6/28 76/52/64/-6/0.00/…/..               28 W   AERO 28 W   RMY 28
6/29 78/60/69/-1/0.00/…/..               30 SSW AERO 30 SSW RMY 32
6/30 82/65/74/+4/0.11/…/..               30 SSW AERO 32 SSW RMY 32

7/1 Low temp since midnight is 67F; normal low is now 61F

 

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 JULY 1
HIGH 98F IN 1964
LOW 44F IN 1988 [RECORD FOR MONTH] PRECIP 4.46 INS IN 1915 [RECORD FOR MONTH] PEAK GUST 52 MPH WNW IN 1974

RECORDS FOR JULY 2
HIGH 95F IN 1963
LOW 47F IN 1988
PRECIP 1.42 INS IN 1986
PEAK GUST 45 MPH SW IN 1999

TODAY’S REPORT PREPARED BY: Kaitlin Geagan