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Friday, June 5, 2015

June 7, 2015

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

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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, JUNE 5, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME

LIGHT WINDS AND MODERATING TEMPERATURES
MAKE WAY FOR POSSIBLE OVERNIGHT SHOWERS

Cool temperatures persisted once more overnight,
with a low down to 48F, some 6 degrees below
the daily norm. Partly cloudy skies have gradually
given way to increasing high cirrus along
with gently dropping pressure.

By the 1:00 PM EST observation skies were mostly
cloudy with high cirrus/cirrocumulus overhead.
Light distant haze had reduced visibility to just
50 miles in all directions. A maximum of 70F
had been recorded by this time as well.

BHO Warmest Mays, deg F (1885-2015)

1) 61.5 in 2015
2) 61.4 in 1991
3) 61.0 in 1944
4) 60.9 in 2010
5) 59.4 in 1911
59.4 in 1959

PRELIMINARY STATS FOR MAY 2015

TEMPERATURE, Deg. F
Avg. Max. 74.6 [+8.3] Avg. Min. 49.7 [+1.9] Mean      62.2 [+5.1] Corrected mean: 61.5
Max. for month: 88 on 5/10
Min. for month: 35 on 5/2

HEATING DEGREE DAYS
Total heating units: 133 [-135] Total for the season: 6404 [+101] Total for last season: 6394

COOLING DEGREE DAYS
Total cooling units: 49 [+27] Total for the season: 49 [+25] Total for last season: 13

PRECIPITATION, Inches
Total: 1.45 [-2.66] Greatest in 24 hrs: 1.07,
2:00 PM EST on 5/31 thru 1:59 PM EST on 6/1

SNOWFALL, Inches
Total: None
Greatest in 24 hrs: N/A

WIND, mph
Avg. uncorrected wind speed: 12.2
Avg. corrected wind speed: 12.6
Prevailing wind direction: SSW @ 23%
Peak gust and direction: 40 NE on the 31st

SUNSHINE:
Astronomical total minutes:   17534 / 27166 or 65%
Campbell-Stokes card minutes: 16950 / 26226 or 65%

Today’s Observations:

7 A.M.
Weather: Scattered cirrus, few cumulus in all directions,
few altocumulus in all directions
Temperature: 55F; Dew Point: 48F; Wind: Calm
Sea-level pressure: 30.19 ins. Hg, about the same
Visibility: 60 miles, except 40 miles WSW-NE
6-hr Max temp: 55F
6-hr Min temp: 48F
24-hr precip: none
BHO SA 1155 180 SCT 60 222/55/48/E0000/019/
VSBY 40 MI WSW-NE FEW CU ALQDS FEW AC ALQDS
LGT DSNT HZ WSW-NE WND CLM/ 8/131 53000 10055 20048

10 A.M.
Weather: Scattered cirrus, few altocumulus in all directions
Temperature: 64F; Dew Point: 48F; Wind: estimated ESE at 4 kts
Wind Speed: Light
Sea-level pressure: 30.14 ins. Hg, falling, then more slowly
Visibility: 60 miles, light distant haze
BHO SA 1455 250 SCT 60 206/64/48/E1204/014/
FEW AC ALQDS LGT DSNT HZ ALQDS WND LGT/ 8/031 56016

1 P.M.
Weather: Broken cirrus/cirrocumulus, few altocumulus
in all directions
Temperature: 70F; Dew Point: 54F;  Wind: E at 7 kts
Sea-level pressure 30.11 ins. Hg, falling, then more quickly
Visibility: 50 miles, light distant haze
6-hr Max temp: 70F
6-hr Min temp: 54F
6-hr precip: none
BHO SA 1755 E250 BKN 50 196/70/54/0807/011/
FEW AC ALQDS LGT DSNT HZ ALQDS/ 8/039 58020 10070 20054

SUMMARY FOR THURSDAY, JUNE 4, 2015

TEMPERATURE (DEGREES F)
MAX…..63   NORMAL…..72
MIN…..46   NORMAL…..54
MEAN….55   NORMAL…..63

DEPARTURE FROM 30-YEAR NORMAL……………………-8
TOTAL DEPARTURE FOR THE MONTH…………………..-49 [-12.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..10  DEPARTURE………..+6
TOTAL HEATING UNITS FOR THE MONTH…………..60  DEPARTURE……….+42
TOTAL HEATING UNITS FOR THE SEASON………..6464  DEPARTURE………+143
TOTAL HEATING UNITS LAST SEASON TO DATE……6406  DIFFERENCE………+58

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..0   DEPARTURE……….-2
TOTAL COOLING UNITS FOR THE MONTH…………..0   DEPARTURE……….-7
TOTAL COOLING UNITS FOR THE SEASON…………49   DEPARTURE………+18
TOTAL COOLING UNITS LAST SEASON TO DATE…….19   DIFFERENCE……..+30

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………17  E    AT  4:16 P.M.*
ASOS…………………..17  NE   AT  3:29 P.M.
DAVIS………………….16  E    AT  4:14 P.M. RMY 16
FASTEST MILE FOR YESTERDAY………………..11  ESE  AT  5:35 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..13  ESE  AT  6:52 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….11  E    AT  5:26 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..5.8 ESE
ASOS…………………..6.3
DAVIS………………….5.4 ESE [113 deg.] * Last of several occurrences…

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…..0.00   DEPARTURE….-0.17
ASOS……………0.00
TOTAL PRECIPITATION FOR THE MONTH………..1.49   DEPARTURE….+0.83
ASOS……………1.51
TOTAL PRECIPITATION FOR THE YEAR………. 20.86   DEPARTURE….-2.33
ASOS……………N/A ***
*** ASOS annual totals not available due to erroneous readings

PRELIMINARY CLIMATE SUMMARY FOR MAY-JUNE CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOWFALL/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

5/1  52/37/45/-8/0.00/0.0/354/42               21 NE  RMY 20
5/2  63/35/49/-4/0.00/0.0/668/79               20 S   RMY 20
5/3  74/44/59/+6/0.00/0.0/509/60               22 S   RMY 22
5/4  83/47/65/+11/0.00/0.0/783/92              39 SSW RMY 45
5/5  77/56/67/+13/0.03/0.0/222/26              29 SW  RMY N/A
5/6  74/54/64/+10/0.00/0.0/574/67              24 SSW RMY 25
5/7  84/52/68/+13/0.00/0.0/824/96              29 S   RMY 32
5/8  74/44/59/+4/0.00/0.0/809/94               27 NNE RMY 26
5/9  77/44/61/+6/0.00/0.0/509/59               30 S   RMY 32
5/10 88/60/74/+19/0.00/0.0/692/80              28 SSW RMY 30
5/11 84/48/66/+10/0.00/0.0/529/61              30 NE  RMY 31
5/12 84/47/66/+10/0.24/0.0/287/33              33 WNW RMY 37
5/13 67/47/57/+1/0.00/0.0/820/94               31 WNW RMY N/A
5/14 70/44/57/+0/0.00/0.0/848/97               22 NW  RMY 22
5/15 73/51/62/+5/0.00/0.0/491/56               20 WSW RMY 21
5/16 68/53/61/+4/T/0.0/053/06                  23 S   RMY 24
5/17 79/50/65/+8/T/0.0/783/89                  21 NE  RMY N/A
5/18 62/48/55/-3/0.00/0.0/538/61               25 NE  RMY N/A
5/19 63/50/57/-1/0.36/0.0/000/00               24 S   RMY 26
5/20 66/46/56/-2/0.00/0.0/753/85               32 WNW RMY 37
5/21 66/43/55/-4/0.00/0.0/461/52               24 S   RMY 24
5/22 73/49/61/+2/T/0.0/711/80                  32 NW  RMY 36
5/23 64/40/52/-7/0.00/0.0/855/96               28 WNW RMY 32
5/24 81/50/66/+7/0.00/0.0/750/84               28 SSW RMY 31
5/25 80/56/68/+8/0.00/0.0/232/26               29 SSW RMY 31
5/26 83/61/72/+12/0.00/0.0/591/66              30 SSW RMY N/A
5/27 82/62/72/+12/T/0.0/727/81                 36 SSW RMY 41
5/28 83/61/72/+11/0.00/0.0/548/61              30 SSW RMY 34
5/29 77/58/68/+7/0.00/0.0/828/92               18 ENE RMY 19
5/30 85/55/70/+9/0.00/0.0/704/78               37 SSW RMY 42
5/31 78/46/62/+1/0.82/0.0/081/09               40 NE  RMY 43 TSTM

6/1  48/46/47/-15/0.69/0.0/000/00              32 NE  RMY 34
6/2  47/44/46/-16/…./0.0/000/00              28 NNE RMY 28
6/3  59/44/52/-10/0.00/0.0/…/..              16 ESE RMY 16
6/4  63/46/55/-8/0.00/0.0/…/..               17 E   RMY 16

6/5 low since midnight is 48F; normal low is now 54F

DAILY RECORDS FOR MAY 2015

None.

DAILY RECORDS FOR JUNE 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 JUNE 5
HIGH 95F IN 1930
LOW 41F IN 1891
PRECIP 2.83 INS IN 1982
PEAK GUST 57 MPH NNW IN 1988

RECORDS FOR JUNE 6
HIGH 95F IN 1925
LOW 42F IN 1885, 1894, 1920, 1945
PRECIP 3.61 INS IN 2000
PEAK GUST 58 MPH NE IN 2000

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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