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BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, JUNE 5, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME
LIGHT DRIZZLE AND THICK FOG ALL DAY
Morning rain turned to light drizzle before the 7:00AM
EST observation and continued through the morning and
early afternoon. Precip. measured 0.46 in. at 7:00AM
with just a trace by 1:00PM. Visibility was limited to
1/16 to 1/8 mile due to thick fog.
Temperatures ranged from an overnight low of 52F to a
max. by 1:00PM of 55F. The normal max. for today is
72F, and the normal min. is 54F. Winds have been
gusting up to 23 MPH and have been out of the east.
PRELIMINARY STATS FOR MAY 2017
TEMPERATURE, Deg. F
Avg. Max. 63.5 [-2.8]
Avg. Min. 47.1 [-0.7]
Mean 55.3 [-1.8]
24-hour corrected mean: 54.9
Max. for month: 96F on 18th
Min. for month: 36F on 9th
HEATING DEGREE DAYS
Total heating units: 329 [+61]
Total for the season: 5662 [-641]
Total for last season: 5248
PRECIPITATION, Inches
Total: 4.53 [+0.42]
Greatest in 24 hrs: 1.67 in. on 13th-14th
SNOWFALL, Inches
Total: 0.0
Greatest in 24 hrs: N/A
WIND, mph
Avg. uncorrected wind speed: 10.6
Avg. corrected wind speed: 11.1
Prevailing wind direction: S at 14%
Peak gust and direction: 46 SSE on 6th
SUNSHINE:
Campbell-Stokes card minutes: 9,570 minutes of possible 26,226 or 36%
Astronomical total minutes: 9,911 minutes of possible 27,196 or 36%
*Sunshine corrected on June 5.
Today’s Observations:
7 A.M.
Weather: Light drizzle, sky obscurement due to fog
Temperature: 53F; Dew Point: 53F; Wind: E at 9 kts
Sea-level pressure: 29.84 ins. Hg, falling then steady
Visibility: 1/8 mile
6-hr Max temp: 53F
6-hr Min temp: 52F
24-hr precip: 0.46 in.
BHO SA 1155 W2 X 1/8L-F 104/53/53/0809/984/ 8//// 56004
MANUAL 70046 ASOS 70045 10053 20052
10 A.M.
Weather: Light drizzle, sky obscurement due to the fog
Temperature: 54F; Dew Point: 54F; Wind: E at 10G15 kts
Sea-level pressure: 29.84 ins. Hg, falling then steady
Visibility: 1/16 miles
6-hr precip: Trace
BHO SA 1455 W1 X 1/16L-F 104/54/54/0810G15/984/ 8//// 53000
MANUAL 6000/
1 P.M.
Weather: Light drizzle, sky obscurement due to the fog
Temperature: 54F; Dew Point: 54F; Wind: E at 14G20 kts
Sea-level pressure: 29.84 ins. Hg, rising then falling
Visibility: 1/8 mile
6-hr Max temp: 55F
6-hr Min temp: 53F
BHO SA 1755 W2 X 1/8L-F 104/54/54/0814G20/984/ 8//// 50000
MANUAL 6000/ 10055 20053
SUMMARY FOR SUNDAY, JUNE 4, 2017
TEMPERATURE (DEGREES F)
MAX…..71 NORMAL…..72
MIN…..49 NORMAL…..54
MEAN….60 NORMAL…..63
DEPARTURE FROM 30-YEAR NORMAL…………………….-3
TOTAL DEPARTURE FOR THE MONTH…………………….-5 [-1.5 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………5 DEPARTURE……….+1
TOTAL HEATING UNITS FOR THE MONTH…………..18 DEPARTURE………..0
TOTAL HEATING UNITS FOR THE SEASON………..5680 DEPARTURE……..-641
TOTAL HEATING UNITS LAST SEASON TO DATE……5255 DIFFERENCE…….+425
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………0 DEPARTURE……….-2
TOTAL COOLING UNITS FOR THE MONTH……………2 DEPARTURE……….-5
TOTAL COOLING UNITS FOR THE SEASON………….58 DEPARTURE………+27
TOTAL COOLING UNITS LAST SEASON TO DATE……..54 DEPARTURE……….+4
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….21 SSE AT 11:39 P.M.*
AERO……………………21 SW AT 8:41 P.M.
ASOS……………………21 WSW AT 8:42 P.M.
DAVIS…………………..19 SW AT 8:41 P.M. RMY N/A
FASTEST MILE FOR YESTERDAY…………………13 SSE AT 11:43 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………14 SSE AT 11:41 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..12 SE AT 11:49 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..8.3 WNW
ASOS…………………..8.4
DAVIS………………….6.7 W [260 deg.]
*Last of multiple occurrences
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.46 DEPARTURE……+0.29
ASOS…………..0.45
TOTAL PRECIPITATION FOR THE MONTH……….0.53 DEPARTURE……-0.13
ASOS…………..0.53
TOTAL PRECIPITATION FOR THE YEAR……….25.87 DEPARTURE……+2.55
ASOS……………N/A ***
*** ASOS annual total not available due to erroneous readings
PRELIMINARY CLIMATE SUMMARY FOR MAY 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
5/1 50/43/47/-6/T/034/04 21 N AERO 18 N RMY 22
5/2 65/42/54/+1/0.26/136/16 41 W AERO 44 W RMY 43
5/3 52/42/53/0/0.00/595/70 37 WNW*AERO 39 WNW RMY 40
5/4 65/40/53/-1/0.00/724/85 23 S AERO 23 S RMY 24
5/5 51/44/48/-6/0.73/000/00 28 E AERO 28 E RMY N/A
5/6 65/50/58/+4/0.23/094/11 46 SSE AERO 48 SSE RMY 49
5/7 63/47/55/0/T/670/78 35 S AERO 38 S RMY 39
5/8 54/38/46/-9/T/224/26 29 WSW AERO 29 WSW RMY 32
5/9 53/36/45/-10/T/251/29 20 ESE AERO 17 ESE RMY 19
5/10 57/42/50/-5/0.00/225/26 17 NNE AERO 16 NW RMY N/A
5/11 58/45/52/-4/0.00/443/51 23 NE* AERO 23 NE RMY 23
5/12 57/41/49/-7/0.01/453/52 21 NE AERO 20 NE RMY 19
5/13 57/41/49/-7/0.19/009/01 24 ENE AERO 24 E RMY N/A
5/14 47/43/45/-12/1.49/000/00 33 NNE AERO 36 N RMY 36
5/15 58/43/51/-6/0.24/018/02 36 NNW AERO 40 NNW RMY 41
5/16 79/51/65/+8/0.00/870/99 26 WNW AREO 26 WNW RMY 29
5/17 90/60/75/+18/T/775/88 32 SSE AERO 33 SW* RMY 34
5/18 96/69/83/+25/0.01/830/94 39 WNW AERO 41 WNW RMY 42 TSTM
5/19 89/56/73/+15/T/814/92 35 W AERO 33 W RMY 37
5/20 67/49/58/0/0.00/709/80 23 NE AERO 22 NE RMY 21
5/21 66/45/56/-3/0.00/773/87 21 E AERO 20 S RMY 21
5/22 53/48/51/-8/0.18/000/00 22 S AERO 22 S RMY 23
5/23 70/51/61/+2/0.01/366/41 21 NNW AERO 18 NNW RMY 19
5/24 65/53/59/0/0.00/116/13 17 E AERO 16 E RMY N/A
5/25 53/49/51/-9/0.66/000/00 36 E AERO 38 E RMY N/A TSTM
5/26 56/46/51/-9/0.44/000/00 35 N AERO 37 N RMY N/A
5/27 67/51/59/6/0.00/449/50 18 SE AERO 18 SE RMY 19
5/28 71/51/61/0/T/333/37 18 SSW*AERO 18 SSW RMY 18
5/29 51/46/49/-12/0.07/000/00 21 E AERO 20 ENE*RMY 20
5/30 61/46/54/-7/0.00/000/00 20 S AERO 22 S RMY 21
5/31 70/52/61/0/0.01/000/00 28 W AERO 29 W RMY 29
PRELIMINARY CLIMATE SUMMARY FOR MAY 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/…/.. 39 NW AERO 39 NW RMY 41
6/2 70/50/60/-2/T/…/.. 32 WNW AERO 35 WNW RMY 34
6/3 66/47/57/-5/0.01/…/.. 23 NW AERO 25 NW RMY 24
6/4 71/49/60/-3/…./…/.. 21 SSE*AERO 21 SW RMY N/A
6/5 Low temp since midnight is 52F; normal low is now 54F
DAILY RECORDS FOR MAY
5/17/17: DAILY RECORD MAXIMUM TEMPERATURE OF 90F,
BREAKS PREVIOUS RECORD OF 88F SET IN 1974
AND TIED IN 1977
5/17/17: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 60F,
TIES PREVIOUS RECORD SET IN 1932
5/18/17: DAILY RECORD MAXIMUM TEMPERATURE OF 96F,
BREAKS PREVIOUS RECORD OF 88F SET IN 1906
AND TIED IN 1936 AND 1986;
BREAKS PREVIOUS MONTHLY RECORD OF 94F SET ON
MAY 26, 2010
5/18/17: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 69F,
BREAKS PREVIOUS RECORD OF 61F SET IN 1943
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: Cecilia Borries-Strigle
