Saturday, June 15, 2019
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, JUNE 15, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME
MOSTLY SUNNY AND SEASONABLY WARM TODAY…
Partial middle and high level clouds earlier this morning
drifted away to leave a mostly sunny sky by early afternoon.
The visibility has been very good near 70 miles all day
with some light distant haze partly obscuring the most distant
mountains. The air has dried from the rain on Thursday with
the dew point holding in the upper 40s today and the relative
humidity dropping to near 30%. The wind has picked up since
sunrise with a peak gust to 29 kts, 33 mph, from the SSW at
14:33 PM EST. The high so far today is 79F, four degrees above
the daily normal maximum of 75F, and the low since midnight
is 54F, three degrees below the daily normal minimum of 57F.
PRELIMINARY STATS FOR MAY 2019
TEMPERATURE, Deg. F
Avg. Max. 63.5 [-2.8]
Avg. Min. 46.0 [-1.8]
Mean 54.8 [-2.2]
24-hour corrected mean: 54.4
Max. for month: 85F on the 26th
Min. for month: 36F on the 12th
HEATING DEGREE DAYS
Total heating units: 318 [+50]
Total for the season: 6219 [-84]
Total for last season: 5847
COOLING DEGREE DAYS
Total cooling units: 8 [-14]
Total for the season: 8 [-16]
Total for last season: 62
PRECIPITATION, Inches
Total: 4.61 [+0.50]
Greatest in 24 hrs: 1.24 ins. on the 13th-14th
SNOWFALL, Inches
Total: Trace [+/-0.0]
Greatest in 24 hrs: Trace [12th]
WIND, mph
Avg. uncorrected wind speed: 10.5
Avg. corrected wind speed: 11.1
Prevailing wind direction: S at 13%
Peak gust and direction: 47 NW on 24th
SUNSHINE:
Campbell-Stokes card minutes: 10362 minutes of possible 26226 or 40%
Astronomical total minutes: 10733 minutes of possible 27166 or 40%
Today’s Observations:
7 A.M.
Weather: Scattered altocumulus (2 layers), thin scattered cirrus,
few cirrocumulus overhead-NE
Temperature: 62F; Dew Point: 49F; Wind: W at 10 kts
Sea-level pressure: 30.11 ins. Hg, rising then more slowly
Visibility: 70 miles, light distant haze
6-hr Max temp: 62F
6-hr Min temp: 54F
24-hr Precip: 0.00 ins.
BHO SA 1155 120 SCT 150 SCT 250 -SCT 70 196/62/49/2610/011/
FEW CC OVHD-NE LGT DSNT HZ/ 8/031 51017 10062 20054
10 A.M.
Weather: Scattered altocumulus, thin broken cirrus
Temperature: 74F; Dew Point: 46F; Wind: SW at 12G18 kts
Sea-level pressure: 30.08 ins. Hg, falling then more quickly
Visibility: 65 miles, light distant haze
3-hr Precip: 0.00 ins.
BHO SA 1455 150 SCT 250 –BKN 65 187/74/46/2312G18/008/
LGT DSNT HZ/ 8/071 58009
1 P.M.
Weather: Thin scattered cirrus, few altocumulus all quadrants,
few altocumulus lenticularis W-NW
Temperature: 78F; Dew Point: 47F; Wind: SW at 13G19 kts
Sea-level pressure: 30.01 ins. Hg, falling then more quickly
Visibility: 70 miles
6-hr Max temp: 79F
6-hr Min temp: 62F
6-hr Precip: 0.00 ins.
BHO SA 1755 250 –SCT 70 163/78/47/2213G19/001/ FEW AC
ALQDS FEW ACSL W-NW PK WND 2226/34/ 8/041 58024 10079
20062
SUMMARY FOR FRIDAY, JUNE 14, 2019
TEMPERATURE (DEGREES F)
MAX…..72 NORMAL…..75
MIN…..50 NORMAL…..57
MEAN….61 NORMAL…..66
DEPARTURE FROM 30-YEAR NORMAL………………….-5
TOTAL DEPARTURE FOR THE MONTH………………….+4 [+0.1 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………4 DEPARTURE………+1
TOTAL HEATING UNITS FOR THE MONTH…………..31 DEPARTURE……..-20
TOTAL HEATING UNITS FOR THE SEASON………..6250 DEPARTURE…….-104
TOTAL HEATING UNITS LAST SEASON TO DATE……5905 DIFFERENCE……+345
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………0 DEPARTURE………-3
TOTAL COOLING UNITS FOR THE MONTH…………..21 DEPARTURE……..-12
TOTAL COOLING UNITS FOR THE SEASON………….29 DEPARTURE……..-28
TOTAL COOLING UNITS LAST SEASON TO DATE……..78 DEPARTURE……..-49
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..38 W AT 6:53 P.M.
AERO…………………….39 W AT 6:55 P.M.*
ASOS…………………….38 W AT 6:53 P.M.
DAVIS……………………38 WSW AT 4:46 P.M. RMY 38
FASTEST MILE FOR YESTERDAY………………….28 W AT 4:47 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….28 W AT 4:48 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………29 WSW AT 5:36 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..15.1 W
ASOS…………………..14.6
DAVIS………………….14.8 SW [229 deg.]
* Last of several occurrences
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00 DEPARTURE…….-0.15
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….2.24 DEPARTURE…….-0.04
ASOS…………..2.27
TOTAL PRECIPITATION FOR THE YEAR……….28.03 DEPARTURE…….+3.09
ASOS………….28.00
PRELIMINARY CLIMATE SUMMARY FOR MAY CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/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
05/01 57/40/49/-4/0.00/0.0/025/03 21 S AERO 21 SSE RMY 21
05/02 45/41/43/-10/0.02/0.0/000/00 21 NE AERO 21 SSW RMY 20
05/03 60/43/52/-1/…./0.0/000/00 23 S AERO 23 S RMY 22
05/04 54/46/50/-4/…./0.0/000/00 14 ENE AERO 14 ENE RMY 17
05/05 52/44/48/-6/0.00/0.0/000/00 18 NE AERO 20 NE RMY N/A
05/06 58/44/51/-3/…./0.0/505/59 25 NE AERO 26 ENE RMY 24
05/07 72/41/57/+2/0.12/0.0/566/66 30 S AERO 29 S RMY 30
05/08 67/48/58/+3/0.00/0.0/758/88 20 NE AERO 20 NE RMY 19
05/09 60/43/52/-3/0.00/0.0/492/57 21 SE AERO 21 E RMY 22
05/10 61/46/54/-1/0.16/0.0/043/05 35 S AERO 37 S RMY 37
05/11 68/50/59/+3/…./0.0/763/88 26 NW AERO M M RMY N/A
05/12 50/36/43/-13/0.68/T/000/00 30 ENE AERO M M RMY N/A
05/13 52/38/45/-11/…./0.0/113/13 35 E AERO M M RMY 34
05/14 44/38/41/-16/…./0.0/000/00 26 NNE AERO M M RMY 25
05/15 58/40/49/-8/…./0.0/587/67 28 NW AERO M M RMY 28
05/16 68/46/57/0/…./0.0/615/70 17 NW AERO M M RMY 19
05/17 64/49/57/0/…./0.0/062/07 22 WNW AERO 21 WNW RMY 25
05/18 72/49/61/+3/…./0.0/811/92 26 SSE AERO 25 SSE RMY 29
05/19 69/50/60/+2/…./0.0/345/39 39 S AERO 43 SSE RMY 42
05/20 85/52/69/11/…./0.0/408/46 35 SW AERO 40 SW RMY 39
05/21 69/52/61/+2/0.00/0.0/843/95 40 NW AERO 46 NW RMY 45
05/22 68/49/59/0/0.00/0.0/862/97 32 NNW AERO 29 NW RMY N/A
05/23 68/48/58/-1/…./0.0/080/09 36 SSW AERO 37 SSW RMY 40
05/24 68/47/58/-1/…./0.0/000/00 47 NW AERO 47 NW RMY 51
05/25 75/47/61/+1/…./0.0/617/69 M M AERO 35 SSW RMY 39
05/26 85/49/67/+7/…./0.0/645/72 40 W AERO 38 W RMY 39
05/27 76/57/67/+7/…./0.0/798/89 30 NE AERO 22 NE RMY 27
05/28 57/48/53/-8/…./0.0/009/01 26 E AERO 22 ESE RMY 25
05/29 51/45/48/-13/…./0.0/000/00 21 NNW AERO 21 NNW RMY N/A
05/30 63/46/55/-6/…./0.0/000/00 23 S AERO 23 S RMY 25
05/31 72/54/63/2/…./0.0/786/87 28 N AERO 23 N RMY 26
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
06/01 71/54/63/+1/0.00/…/.. 21 E AERO 20 E RMY 18
06/02 75/51/63/+1/…./…/.. 23 S AERO 21 S RMY N/A
06/03 69/50/60/-2/…./…/.. 41 W AERO 39 W RMY 43
06/04 70/45/58/-5/0.00/…/.. 29 W AERO 23 W RMY N/A
06/05 81/57/69/+6/…./…/.. 33 SSW AERO 33 SSW RMY N/A
06/06 75/64/70/+6/…./…/.. 28 SSW AERO 28 SSW RMY N/A
06/07 80/59/70/+6/0.00/…/.. 23 S AERO 23 S RMY 22
06/08 78/57/68/+4/0.00/…/.. 23 ENE AERO 21 SW RMY 21
06/09 78/55/67/+3/0.00/…/.. 22 S AERO 21 S RMY 21
06/10 79/54/67/+2/…./…/.. 26 SSE AERO 25 SSE RMY 33
06/11 73/58/66/+1/…./…/.. 32 NW AERO 30 NW RMY 35
06/12 75/52/64/-1/…./…/.. 25 SSW AERO 25 S RMY 28
06/13 55/49/52/-13/…./…/.. 36 NE AERO 35 NE RMY 35
06/14 72/50/61/-5/0.00/…/.. 38 W AERO 39 W RMY 38
06/15 Low temp since midnight is 54F; normal low is 57F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR JUNE 15
HIGH 94F IN 1988
LOW 42F IN 1959, 1978
PRECIP 2.04 INS IN 1903
PEAK GUST 52 MPH SW IN 1972
RECORDS FOR JUNE 16
HIGH 92F IN 1891, 1967
LOW 44F IN 1926
PRECIP 2.17 INS IN 1931
PEAK GUST 55 MPH W IN 1958
TODAY’S REPORT PREPARED BY: Mike Iacono
