Sunday, July 7, 2019

| July 7, 2019 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JULY 7, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

COOL AND DRY FOLLOWING LAST NIGHT’S
THUNDERSTORMS….

Temperatures today were much cooler when
compared to days before, with a light
northeast wind off the ocean. Conditions
remained dry with decreasing cloud cover
and a decent average visibility of 50
miles. We measured 0.83 inches from last
nights rain, with more than 0.60 inches
falling between 4 P.M. and 5 P.M. yesterday.
The high so far today is 72F, which is 8
degrees below the average daily maximum of
80F. The low since midnight is 64F, 2 degrees
above the daily normal minimum of 62F.

PRELIMINARY STATS FOR JUNE 2019

TEMPERATURE, Deg. F
Avg. Max. 75.1 [+0.1]
Avg. Min. 57.3 [+0.2]
Mean      66.2 [+0.1]
24-hour corrected mean: 66.0
Max. for month: 88F on the 28th
Min. for month: 45F on the 4th

COOLING DEGREE DAYS
Total cooling units:    81 [-24]
Total for the season:   89 [-40]
Total for last season: 159

HEATING DEGREE DAYS
Total cooling units:     36  [-37]
Total for the season:  6254 [-122]
Total for last season: 5916

PRECIPITATION, Inches
Total: 4.08 [-0.23]
Greatest in 24 hrs: N/A

WIND, mph
Avg. uncorrected wind speed: 9.9
Avg. corrected wind speed: 10.5
Prevailing wind direction: S at 17%
Peak gust and direction: 41 W on 3rd

SUNSHINE:
Campbell-Stokes card minutes: N/A
Astronomical total minutes:   N/A

Today’s Observations:

7 A.M.
Weather: Scattered altocumulus, broken cirrus,
few cumulus SW
Temperature: 65F; Dew Point: 57F; Wind: SW at 14G24 kts,
Peak wind: 30 MPH (26 kts) NE at 6:06 A.M.
Sea-level pressure: 29.95 ins. Hg, rising steadily
Visibility: 40 miles, distant haze
6-hr Max temp: 70F
6-hr Min temp: 64F
24-hr Precip: 0.83 ins.
BHO SA 1155 180 SCT E250 BKN 40 142/65/57/0514G24/995/
FEW CU SW DSNT HZ ALQDS PK WND 0526/06/ 8/182 52023
10070 20064

10 A.M.
Weather: Scattered altocumulus, broken cirrus,
few cumulus SW-N
Temperature: 68F; Dew Point: 55F; Wind: NE at 8 kts
Sea-level pressure: 29.98 ins. Hg, rising steadily
Visibility: 50 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 70 SCT E250 BKN 50 153/68/55/0508/998/
FEW CU SW-N/ 8/181 51011

1 P.M.
Weather: Scattered cirrus, few cumulus
Temperature: 73F; Dew Point: 55F; Wind: SW at 5 kts,
Wind: Light
Sea-level pressure: 29.96 ins. Hg, falling steadily
Visibility: 60 miles
6-hr Max temp: 73F
6-hr Min temp: 65F
6-hr Precip: 0.00 ins.
BHO SA 1755 E250 SCT 60 147/73/55/0705/996/ FEW CU ALQDS
WND LGT/ 8/101 58006 10073 20065

SUMMARY FOR SATURDAY, JULY 6, 2019

TEMPERATURE (DEGREES F)
MAX…..90   NORMAL…..80
MIN…..71   NORMAL…..62
MEAN….81   NORMAL…..71

DEPARTURE FROM 30-YEAR NORMAL…………………+10
TOTAL DEPARTURE FOR THE MONTH…………………+36 [+5.8 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..16   DEPARTURE………+9
TOTAL COOLING UNITS FOR THE MONTH…………..70   DEPARTURE……..+33
TOTAL COOLING UNITS FOR THE SEASON…………158   DEPARTURE………-8
TOTAL COOLING UNITS LAST SEASON TO DATE…….246   DEPARTURE……..-88

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..26 WNW AT  4:40 P.M.
AERO…………………….MISSING
ASOS…………………….29 NW  AT  4:43 P.M.
DAVIS……………………29 WNW AT  4:41 P.M.  RMY N/A
FASTEST MILE FOR YESTERDAY………………….21 SSW AT 12:56 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….21 SSW AT 12:38 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………21 WSW AT  4:43 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..11.3 SW
ASOS…………………..11.7
DAVIS………………….11.6 SW [241 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.83  DEPARTURE……+0.72
ASOS…………..0.83
TOTAL PRECIPITATION FOR THE MONTH……….0.83  DEPARTURE……+0.17
ASOS…………..0.83
TOTAL PRECIPITATION FOR THE YEAR……….30.70  DEPARTURE……+3.07
ASOS………….30.60

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/-5/0.00/540/59               38 W   AERO 39 W   RMY 38
06/15 79/54/67/+1/0.00/898/98               38 SSW AERO 41 SSW RMY 40
06/16 70/62/66/0/…./000/00                32 SW  AERO 35 SW  RMY N/A
06/17 74/62/68/+1/…./348/38               12 SSE AERO 18 NW  RMY 17
06/18 71/62/67/0/…./000/00                17*S   AERO 17 S   RMY 16
06/19 74/61/68/+1/…./101/11               16 SSE AERO 20 SSE RMY 19
06/20 69/61/65/-3/…./000/00               26 S   AERO 26 S   RMY 29
06/21 68/58/63/-5/…./018/02               32 NW  AERO 28 NW  RMY 33
06/22 77/56/67/-1/…./779/85               33 NW  AERO 32 NW  RMY 35
06/23 82/59/71/+3/…./871/95               30 NW  AERO 25 WNW RMY 29
06/24 84/61/73/+4/…./779/85               22 NW  AERO 21 NW  RMY 22
06/25 73/61/67/-2/0.18/083/09               35 S   AERO 37 S   RMY 37
06/26 77/64/71/+2/0.00/559/61               12 ENE AERO 18 SE  RMY N/A
06/27 81/57/69/0/0.00/614/67                21 NE  AERO 18 NE  RMY N/A
06/28 88/64/76/+6/…/870/95                16 SW  AERO 18 SW  RMY N/A
06/29 80/66/73/+3/…/165/18                25 W   AERO 25 W   RMY 26
06/30 75/59/67/-3/…/430/47                31 N   AERO 30 N   RMY 35

*Estimated

PRELIMINARY CLIMATE SUMMARY FOR JULY 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

07/01 83/58/71/+1/0.00/…/..               21 NNW AERO 21 NNW RMY N/A
07/02 82/65/74/+4/0.00/…/..               23 W   AERO 23 W   RMY 23
07/03 89/67/78/+7/0.00/…/..               18 S   AERO 18 S   RMY 18
07/04 88/68/78/+7/0.00/…/..               17 SSW AERO M  M   RMY 17
07/05 87/69/78/+7/0.00/…/..               21 SW  AERO M  M   RMY 21
07/06 90/71/81/+10/0.83/…/..              26 WNW AERO M  M   RMY N/A

07/07 Low temp since midnight is 64F; normal low is 62F

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: Benjamin Turner

Category: Daily Discussions

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