Sunday, June 30, 2019

| June 30, 2019 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JUNE 30, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

INCREASING CLOUDS AND SOME DISTANT THUNDERSTORMS
IN THE AFTERNOON….

Today we observed a decent visibility of 65 miles
due to a distant haze. Clouds increased since this
morning, with some cumulonimbus being seen shortly
following noontime. Lightning was seen to the north
and west following the 1 P.M. observation. Wind has
remained northwesterly throughout the day, with a
max gust of 23 mph. We measured 0.01 inches of rain
since the 7 A.M. observation yesterday, as the observatory
was missed by yesterday’s afternoon thunderstorms to the
north and south. The high so far today is 75F, which is
four degrees below the daily normal of 79F. The low since
midnight is 63F, two degrees above the daily normal minimum
of 61F.

After a cloudy and cool spring, the first ripe blueberries
were observed in the enclosure on June 28th, which was
seven days later than the long term average date of June 21st.
This was the latest date on which the first ripe blueberries
were observed in the instrument enclosure since June 29th, 1982.

Today’s Observations:

7 A.M.
Weather: Scattered altostratus
Temperature: 69F; Dew Point: 60F; Wind: NW at 5 kts,
Wind: Light
Sea-level pressure: 29.70 ins. Hg, rising then falling
Visibility: 65 miles
6-hr Max temp: 69F
6-hr Min temp: 63F
24-hr Precip: 0.01 ins.
BHO SA 1155 220 SCT 65 059/69/60/3105/970/ WND LGT/
8/020 70001 58001 10069 20063

10 A.M.
Weather: Broken altostratus, few cumulus, rain beginning
at 9:55 A.M.
Temperature: 73F; Dew Point: 59F; Wind: NW at 14G20 kts
Sea-level pressure: 29.71 ins. Hg, rising then falling
Visibility: 70 miles
3-hr Precip: Trace
BHO SA 1455 E110 BKN 70 060/73/59/3114G20/971/ FEW CU
ALQDS R-B55/ 8/120 600// 55001

1 P.M.
Weather: Scattered cumulus, broken altocumulus,
distant cumulonimbus NW-N
Temperature: 74F; Dew Point: 61F; Wind: WNW at 8 kts
Sea-level pressure: 29.68 ins. Hg, falling then more slowly
Visibility: 65 miles
6-hr Max temp: 75F
6-hr Min temp: 68F
6-hr Precip: Trace
BHO SA 1755 50 SCT E200 BKN 65 051/74/61/3008/968/ DSNT
CB NW-N/ 8/220 600// 56009 10075 20068

SUMMARY FOR SATURDAY, JUNE 29, 2019

TEMPERATURE (DEGREES F)
MAX…..80   NORMAL…..79
MIN…..66   NORMAL…..61
MEAN….73   NORMAL…..70

DEPARTURE FROM 30-YEAR NORMAL………………….+3
TOTAL DEPARTURE FOR THE MONTH…………………+13 [+0.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………0   DEPARTURE………-1
TOTAL HEATING UNITS FOR THE MONTH…………..36   DEPARTURE……..-37
TOTAL HEATING UNITS FOR THE SEASON………..6255   DEPARTURE…….-120
TOTAL HEATING UNITS LAST SEASON TO DATE……5916   DIFFERENCE……+339

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………8   DEPARTURE………+2
TOTAL COOLING UNITS FOR THE MONTH…………..78   DEPARTURE……..-21
TOTAL COOLING UNITS FOR THE SEASON………….86   DEPARTURE……..-37
TOTAL COOLING UNITS LAST SEASON TO DATE…….144   DEPARTURE……..-58

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..25 W   AT 11:52 P.M.
AERO…………………….25 W   AT 11:58 P.M.
ASOS…………………….25 W   AT 11:54 P.M.
DAVIS……………………27 W   AT 11:59 P.M. RMY 26
FASTEST MILE FOR YESTERDAY………………….23 W   AT 11:55 P.M
MAXIMUM 2-MINUTE ASOS AVERAGE……………….21 W   AT 11:55 P.M
MAXIMUM 2-MINUTE DAVIS AVERAGE………………22 W   AT 11:55 P.M
AVERAGE WIND SPEED AND DIRECTION……………8.5 SW
ASOS……………………9.5
DAVIS…………………..8.9 SW [235 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.01  DEPARTURE……-0.11
ASOS…………..0.01
TOTAL PRECIPITATION FOR THE MONTH……….3.95  DEPARTURE……-0.25
ASOS…………..3.92
TOTAL PRECIPITATION FOR THE YEAR……….29.74  DEPARTURE……+2.88
ASOS………….29.65

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/+1/0.00/551/61               21 E   AERO 20 E   RMY 18
06/02 75/51/63/+1/…./417/46               23 S   AERO 21 S   RMY N/A
06/03 69/50/60/-2/…./753/83               41 W   AERO 39 W   RMY 43
06/04 70/45/58/-5/0.00/717/79               29 W   AERO 23 W   RMY N/A
06/05 81/57/69/+6/…./527/58               33 SSW AERO 33 SSW RMY N/A
06/06 75/64/70/+6/…./428/47               28 SSW AERO 28 SSW RMY N/A
06/07 80/59/70/+6/0.00/692/76               23 S   AERO 23 S   RMY 22
06/08 78/57/68/+4/0.00/885/97               23 ENE AERO 21 SW  RMY 21
06/09 78/55/67/+3/0.00/840/93               22 S   AERO 21 S   RMY 21
06/10 79/54/67/+2/…./712/78               26 SSE AERO 25 SSE RMY 33
06/11 73/58/66/+1/…./247/27               32 NW  AERO 30 NW  RMY 35
06/12 75/52/64/-1/…./869/95               25 SSW AERO 25 S   RMY 28
06/13 55/49/52/-13/…./000/00              36 NE  AERO 35 NE  RMY 35
06/14 72/50/61/-5/0.00/…/..               38 W   AERO 39 W   RMY 38
06/15 79/54/67/+1/0.00/…/..               38 SSW AERO 41 SSW RMY 40
06/16 70/62/66/0/…./…/..                32 SW  AERO 35 SW  RMY N/A
06/17 74/62/68/+1/…./…/..               12 SSE AERO 18 NW  RMY 17
06/18 71/62/67/0/…./…/..                17*S   AERO 17 S   RMY 16
06/19 74/61/68/+1/…./…/..               16 SSE AERO 20 SSE RMY 19
06/20 69/61/65/-3/…./…/..               26 S   AERO 26 S   RMY 29
06/21 68/58/63/-5/…./…/..               32 NW  AERO 28 NW  RMY 33
06/22 77/56/67/-1/…./…/..               33 NW  AERO 32 NW  RMY 35
06/23 82/59/71/+3/…./…/..               30 NW  AERO 25 WNW RMY 29
06/24 84/61/73/+4/…./…/..               22 NW  AERO 21 NW  RMY 22
06/25 73/61/67/-2/0.18/…/..               35 S   AERO 37 S   RMY 37
06/26 77/64/71/+2/0.00/…/..               12 ENE AERO 18 SE  RMY N/A
06/27 81/57/69/0/0.00/…/..                21 NE  AERO 18 NE  RMY N/A
06/28 88/64/75/+5/…/…/..                16 SW  AERO 18 SW  RMY N/A
06/29 80/66/73/+3/…/…/..                25 W   AERO 25 W   RMY 26

06/30 Low temp since midnight is 63F; normal low is 61F

*Estimated

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

RECORDS FOR JUNE 30
HIGH 94F IN 1964
LOW 47F IN 1919
PRECIP 3.04 INS IN 1921
PEAK GUST 51 MPH WNW IN 1957

RECORDS FOR JULY 1
HIGH 98F IN 1964
LOW 44F IN 1988 [RECORD FOR MONTH]
PRECIP 4.46 INS IN 1915 [RECORD FOR MONTH]
PEAK GUST 52 MPH WNW IN 1974

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

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