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Tuesday, July 7, 2015

July 7, 2015

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY TUESDAY, JULY,…

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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, JULY, 7 2015
ALL TIMES ARE IN EASTERN STANDARD TIME

HUMIDITY ON THE RISE, DEW POINTS HIT THE LOWER 70S

Yesterday’s maximum temperature of 85F cooled
overnight to a low of 65F, with gradually rising
humidity. Thin fog and haze have kept visibility
reduced under 20 miles for a second consecutive day.

By the 1:00 PM EST observation hazy conditions were
still in place. A passing shower dropped 0.02 inches
of new rain, as very isolated showers have moved
through the region. A dew point of 70F was still present
at the observation, with a maximum temperature of 84F.
PRELIMINARY STATS FOR JUNE 2015

TEMPERATURE, Deg. F
Avg. Max. 72.9 [-2.1] Avg. Min. 55.8 [-1.3] Mean      64.4 [-1.7] Corrected mean: 63.9
Max. for month: 86 on 6/12
Min. for month: 44 on 6/2 and 6/3

HEATING DEGREE DAYS
Total heating units: 101 [+28] Total for the season: 6505 [+129] Total for last season: 6422

COOLING DEGREE DAYS
Total cooling units: 89 [-16] Total for the season: 138 [+9] Total for last season: 109

PRECIPITATION, Inches
Total: 4.90 [+0.59] Greatest in 24 hrs: N/A

WIND, mph
Avg. uncorrected wind speed: 10.4
Avg. corrected wind speed: 10.9
Prevailing wind direction: S @ 12%
Peak gust and direction: 41 SSW on the 8th

SUNSHINE:
Astronomical total minutes:  12,941 out of 27,416 possible, or 47%
Campbell-Stokes card minutes: 12,450 out of 26,376 possible, or 47%

Today’s Observations:

7 A.M.
Weather: Scattered stratus fractus, broken stratocumulus
Temperature: 71F; Dew Point: 68F; Wind: SSE at 7 kts
Sea-level pressure: 30.13 ins. Hg, rising, then falling but still higher
Visibility: 10 miles, thin fog, hazy
6-hr Max temp: 71F
6-hr Min temp: 65F
24-hr precip: none
BHO SA 1155 7 SCT E26 BKN 10 203/71/68/1507/013/ THN FG ALQDS HAZY/
8/500 50001 10071 20065

10 A.M.
Weather: Scattered moderate cumulus, broken stratocumulus,
few stratus fractus in all directions, cumulus building
in all directions, showers distant NNE
Temperature: 79F; Dew Point: 70F; Wind: S at 7 kts
Sea-level pressure: 30.12 ins. Hg, falling, then more quickly
Visibility: 15 miles, hazy
BHO SA 1455 20 SCT E43 BKN 15 199/79/70/1707/012/ SHWRS DSNT NNE
FEW STFRA ALQDS MDT CU ALQDS CU BLDG ALQDS HAZY/ 8/200 58004

1 P.M.
Weather: Scattered cumulus, scattered stratocumulus,
few moderate cumulus
Temperature: 84F; Dew Point: 70F; Wind: S at 15 kts,
Sea-level pressure: 30.05 ins. Hg, falling, then more quickly
Visibility: 25 miles, hazy, except 15 miles NNE-NE
6-hr Max temp: 84F
6-hr Min temp: 71F
3-hr precip: 0.02 inches
BHO SA 1755 21 SCT 40 SCT 25 176/84/70/1915/005/ VSBY 15 MI NNE-NE
MDT CU NE HAZY/ 8/200 58023 ASOS 60001 MANUAL 60002 10084 20071
SUMMARY FOR TUESDAY, JULY 7, 2015

TEMPERATURE (DEGREES F)
MAX…..85   NORMAL…..80
MIN…..64   NORMAL…..62
MEAN….75   NORMAL…..71

DEPARTURE FROM 30-YEAR NORMAL……………………+4
TOTAL DEPARTURE FOR THE MONTH……………………-1 [-0.3 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..10   DEPARTURE……….+3
TOTAL COOLING UNITS FOR THE MONTH…………..33   DEPARTURE……….-4
TOTAL COOLING UNITS FOR THE SEASON…………171   DEPARTURE……….+5
TOTAL COOLING UNITS LAST SEASON TO DATE…….159   DIFFERENCE………12

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….20 S   AT   7:58 P.M.
ASOS……………………21 S   AT   7:57 P.M.
DAVIS…………………..19 S   AT   7:57 P.M.  RMY 21
FASTEST MILE FOR YESTERDAY…………………13 S   AT   8:06 P.M.*
MAXIMUM 2-MINUTE ASOS AVERAGE………………15 S   AT   7:45 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..14 S   AT   8:06 P.M.
AVERAGE WIND SPEED AND DIRECTION…………. .7.8 WNW
ASOS……………………8.0
DAVIS…………………..6.7 SW [233 deg.]

*ADDITIONAL FASTEST MILE TIME OF 7:46 P.M. EST

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…..0.00  DEPARTURE…..-0.11
ASOS……………0.00
TOTAL PRECIPITATION FOR THE MONTH………..0.59  DEPARTURE…..-0.06
ASOS……………0.60
TOTAL PRECIPITATION FOR THE YEAR………. 24.86  DEPARTURE…..-2.63
ASOS……………N/A ***

*** ASOS annual totals not available due to erroneous readings

PRELIMINARY CLIMATE SUMMARY FOR JUNE CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/RMY 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  48/46/47/-15/0.69/000/00              32 NE  RMY 34
6/2  47/44/46/-16/0.78/000/00              28 NNE RMY 28
6/3  59/44/52/-10/0.00/172/19              16 ESE RMY 16
6/4  63/46/55/-8/0.00/445/49               17 E   RMY 16
6/5  70/49/60/-3/T/500/55                  17 NNE RMY 17
6/6  65/52/59/-4/0.06/382/42               26 ENE RMY 27
6/7  73/49/61/-3/0.00/884/97               28 S   RMY 29
6/8  73/50/62/-2/T/310/34                  41 SSW RMY 48
6/9  76/61/69/+4/0.03/228/25               29 SSW RMY 32
6/10 82/57/70/+5/0.00/840/92               24 WSW RMY N/A
6/11 85/61/73/+8/0.00/594/65               29 SSW RMY 32
6/12 86/65/76/+11/0.00/522/57              26 S   RMY 29
6/13 83/67/75/+10/T/586/64                 24 N   RMY 27
6/14 75/61/68/+2/0.00/641/70               21 SSE RMY 21
6/15 61/52/57/-9/0.60/000/00               25 SE  RMY 26
6/16 73/56/65/-1/T/009/01                  18 NW  RMY N/A
6/17 70/57/64/-3/0.00/605/66               28 NE  RMY 28
6/18 76/54/65/-2/0.00/669/73               22 S   RMY 26
6/19 84/60/72/+5/T/642/70                  24 SSW RMY 22
6/20 75/56/66/-2/0.05/559/61               23 SSE RMY N/A
6/21 76/60/68/0/1.14/202/22                26 S   RMY 29
6/22 83/63/73/+5/0.00/770/84               20 WNW RMY 19
6/23 85/67/76/+8/0.01/284/31               36 S   RMY 38
6/24 82/62/72/+3/0.00/899/98               25 WNW RMY 27
6/25 80/60/70/+1/0.00/605/66               21 W   RMY N/A
6/26 72/58/65/-4/0.01/540/59               23 NNE RMY 21
6/27 73/56/65/-4/…./202/22               32 ESE RMY N/A
6/28 59/50/55/-15/…./000/00              39 ENE RMY 38
6/29 71/50/61/-9/…./110/12               17 SSW RMY 18
6/30 81/60/71/+1/T/741/81                  21 S   RMY N/A

7/1  80/63/72/+2/0.59/…/..               30 SSE RMY 33  TSTM
7/2  78/60/69/-1/0.00/…/..               23 WNW RMY N/A
7/3  79/58/69/-2/0.00/…/..               17 SSW RMY 17
7/4  74/61/68/-3/T/…/..                  16 S   RMY N/A
7/5  82/58/70/-1/0.00/…/..               20 WSW RMY 20
7/6  85/64/75/+4/0.00/…/..               20 S   RMY 21

7/7 low since midnight is 65F; normal low is now 62F

DAILY RECORDS FOR JUNE AND JULY 2015

6/1- NEW RECORD LOW MAXIMUM TEMPERATURE OF 48F
surpasses previous record of 51F in 2004

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

RECORDS FOR JULY 7
HIGH 97F IN 1908,1993
LOW 48F IN 1902
PRECIP 2.11 INS IN 1966
PEAK GUST 55 MPH NW IN 1989

RECORDS FOR JULY 8
HIGH 95F IN 1981
LOW 50F IN 1919
PRECIP 1.74 INS IN 1916
PEAK GUST 46e SSW IN 1941

TODAY’S REPORT PREPARED BY: Brian Fitzgerald

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Blue Hill Observatory & Science Center · Legal

Data Use & Privacy Policy

Please read the full Policy before accessing Observatory data · Effective January 1, 2025

Notice: By accessing, downloading, or using any Blue Hill Observatory data or services, you unconditionally accept and agree to be bound by this Policy in its entirety. If you do not agree, you may not access or use Observatory data.
Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
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