Monday, July 3, 2017

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, JULY 3, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME

ANOTHER SUNNY AND WARM DAY AT BHO

Today has been very similar to yesterday with warm
temperatures, dry air, and mostly sunny skies.  Temps.
had reached 84F by 1:00PM EST.  Dew points again dropped
into the upper 50s in the afternoon.  Distant haze
slightly limited visibility during the morning observa-
tions but cleared enough for 70 miles at 1:00PM.  Skies
have remained mostly sunny which will make for excellent
conditions for firework viewing in the area tonight.

 

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: 94F on  12th
Min. for month: 45F on  6th

HEATING DEGREE DAYS
Total heating units: 63 [-10] 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: 15,030 minutes of possible 26,376 or 57%
Astronomical total minutes: 15,613 minutes of possible 27,417 or 57%

Today’s Observations:

7 A.M.
Weather: Scattered cirrus
Temperature: 74F; Dew Point: 63F; Wind: W at 6 kts,
Wind speed: Light
Sea-level pressure: 29.95 ins. Hg, rising then steady
Visibility: 55 miles, distant haze in all directions
6-hr Max temp: 74F
6-hr Min temp: 68F
24-hr precip: Trace
BHO SA 1155 250 SCT 55 141/74/63/2606/995/ DSNT HZ ALQDS WND LGT/
8/001 51006 10074 20068

10 A.M.
Weather: Few cumulus SW-NE and E-SSE, few altocumulus SW-NE,
scattered cirrus
Temperature: 80F; Dew Point: 59F; Wind: W at 10 kts
Sea-level pressure: 29.93 ins. Hg, steady then falling
Visibility: 60 miles, distant haze in all directions
BHO SA 1455 250 SCT 60 137/80/59/2610/993/ FEW CU SW-NE AND E-SSE
FEW AC SW-NE DSNT HZ ALQDS/ 8/131 58004

1 P.M.
Weather: Scattered cumulus, scattered cirrus
Temperature: 84F; Dew Point: 59F; Wind: W at 9G16 kts
Sea-level pressure: 29.91 ins. Hg, steady then falling
Visibility: 70 miles
6-hr Max temp: 84F
6-hr Min temp: 74F
BHO SA 1755 49 SCT 250 SCT 70 130/84/59/2709G16/991/
8/101 56007 10084 20074

 

SUMMARY FOR SUNDAY, JULY 2, 2017

TEMPERATURE (DEGREES F)
MAX…..87   NORMAL…..79
MIN…..69   NORMAL…..62
MEAN….78   NORMAL…..70

DEPARTURE FROM 30-YEAR NORMAL…………………….+8
TOTAL DEPARTURE FOR THE MONTH……………………+14 [+6.8 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..13   DEPARTURE……….+7
TOTAL COOLING UNITS FOR THE MONTH…………..24   DEPARTURE………+12
TOTAL COOLING UNITS FOR THE SEASON…………225   DEPARTURE………+84
TOTAL COOLING UNITS LAST SEASON TO DATE…….172   DEPARTURE………+53

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….25 W AT 3:16 P.M.*
AERO……………………28 W AT 4:37 P.M.*
ASOS……………………28 W AT 3:15 P.M.
DAVIS…………………..26 W AT 3:05 P.M. RMY 27
FASTEST MILE FOR YESTERDAY…………………20 W AT 3:15 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………21 W AT 3:22 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..20 W AT 3:22 P.M.
AVERAGE WIND SPEED AND DIRECTION………….11.5 W
ASOS………………….12.0
DAVIS…………………10.1 W [259 DEG.] *last of multiple occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…Trace  DEPARTURE……-0.11
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.00  DEPARTURE……-0.22
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE YEAR……….31.37  DEPARTURE……+4.18
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/+9/0.00/413/45               33 S   AERO 36 S   RMY 36 TSTM
6/24 84/68/76/+7/0.19/413/45               28 WNW AERO 31 WNW RMY 32
6/25 83/61/72/+3/T/688/75                  29 WNW AERO 35 WNW RMY 34
6/26 79/57/68/-1/0.00/843/92               24 W   AERO 24 W   RMY 23
6/27 74/55/65/-4/0.11/421/46               43 S   AERO 45 S   RMY 45 TSTM
6/28 76/52/64/-6/0.00/897/98               28 W   AERO 28 W   RMY 28
6/29 78/60/69/-1/0.00/055/06               30 SSW AERO 30 SSW RMY 32
6/30 82/65/74/+4/0.11/229/25               30 SSW AERO 32 SSW RMY 32

 

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

 

PRELIMINARY CLIMATE SUMMARY FOR JULY 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

7/1  85/67/76/+6/T/…/..                  35 S   AERO 37 S   RMY 38
7/2  87/69/78/+8/T/…/..                  25 W*  AERO 28 W*  RMY 27

7/3 Low temp since midnight is 68F; normal low is now 62F

 

DAILY RECORDS FOR JULY

None so far.

 

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):

RECORDS FOR JULY 3
HIGH 99F IN 1911
LOW 47F IN 1914
PRECIP 1.36 IN 1985
PEAK GUST 52 MPH NW IN 1963

RECORDS FOR JULY 4
HIGH 98F IN 1911, 1919, 1949
LOW 48F IN 1914
PRECIP 2.48 IN 2014
PEAK GUST 50e MPH WNW IN 1949

TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle