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Sunday, July 28, 2019

July 28, 2019

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

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JULY 28, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

WARM SUMMER DAY WITH LOW CLOUD
COVER ON TOP OF THE GREAT BLUE HILL…

Clear skis through the early afternoon with a layer of
scattered cumulus being observed at the 1 P.M observation.
Wind increased as pressure began to decrease after the 10 A.M
observation. The peak gust so far was 22 knots reported on the
420c. The high so far today is 82F, which is 1 degrees above
the average daily maximum of 81F. The low since midnight is
64F, 1 degrees above the daily normal minimum of 63F

Today’s Observations:

7 A.M.
Weather: Clear
Temperature: 75F; Dew Point: 65F; Wind: SSW at 12 kts
Sea-level pressure: 30.09 ins. Hg, falling, then steady
Visibility: 35 miles, distant haze
6-hr Max temp: 75F
6-hr Min temp: 64F
24-hr Precip: 0.00 ins.
BHO SA 1155 CLR 35 192/75/65/2012/009/ DSNT HZ ALQDS/
8/000 56006 10075 20064

10 A.M.
Weather: Clear
Temperature: 82F; Dew Point: 70F; Wind: SW at 6 kts
Sea-level pressure: 30.07 ins. Hg, rising, than falling
Visibility: 35 miles, distant haze
3-hr Precip: 0.00 ins.
BHO SA 1455 CLR 35 185/82/70/2306/007/ DSNT HZ ALQDS/
8/000 58007

1 P.M.
Weather: Scattered cumulus
Temperature: 82F; Dew Point: 67F; Wind: WSW at 12G23 kts
Sea-level pressure: 30.02 ins. Hg, falling, then more quickly
Visibility: 35 miles, distant haze
6-hr Max temp: 83F
6-hr Min temp: 75F
6-hr Precip: 0.00 ins.
BHO SA 1755 60 SCT 35 167/82/67/2412G23/002/ DSNT HZ ALQDS/
8/100 58018 10083 20075

SUMMARY FOR SATURDAY, JULY 27, 2019

TEMPERATURE (DEGREES F)
MAX…..83   NORMAL…..81
MIN…..64   NORMAL…..63
MEAN….74   NORMAL…..72

DEPARTURE FROM 30-YEAR NORMAL………………….+2
TOTAL DEPARTURE FOR THE MONTH…………………+81 [+2.8 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………9   DEPARTURE………+1
TOTAL COOLING UNITS FOR THE MONTH………….264   DEPARTURE……..+71
TOTAL COOLING UNITS FOR THE SEASON…………355   DEPARTURE……..+31
TOTAL COOLING UNITS LAST SEASON TO DATE…….413   DEPARTURE……..-60

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..21 S   AT 8:23 P.M.
AERO…………………….23 S   AT 7:11 P.M.
ASOS…………………….21 S   AT 8:26 P.M.
DAVIS……………………23 S   AT 6:38 P.M. RMY 21
FASTEST MILE FOR YESTERDAY………………….17 S   AT 8:29 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….16 S   AT 7:07 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………14 S   AT 7:10 P.M.
AVERAGE WIND SPEED AND DIRECTION……………9.6 S
ASOS……………………10.2
DAVIS…………………..9.2 SSW [197 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.14
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….4.90  DEPARTURE……+1.48
ASOS…………..4.94
TOTAL PRECIPITATION FOR THE YEAR……….34.77  DEPARTURE……+4.38
ASOS………….34.71

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/+1/0.00/896/98               21 NNW AERO 21 NNW RMY N/A
07/02 82/65/74/+4/0.00/329/36               23 W   AERO 23 W   RMY 23
07/03 89/67/78/+7/0.00/866/95               18 S   AERO 18 S   RMY 18
07/04 88/68/78/+7/0.00/748/82               17 SSW AERO M  M   RMY 17
07/05 87/69/78/+7/0.00/829/91               21 SW  AERO M  M   RMY 21
07/06 90/71/81/+10/0.83/646/71              26 WNW AERO M  M   RMY N/A
07/07 78/64/71/0/0.00/827/91                30 NE  AERO M  M   RMY N/A
07/08 79/59/69/-3/0.00/763/84               16 N   AERO 18 SSW RMY N/A
07/09 85/61/73/+1/0.00/871/96               18 NW  AERO 16 NW  RMY 18
07/10 88/69/79/+7/0.00/607/67               20 ESE AERO 16 ESE RMY 17
07/11 81/67/74/+2/0.62/000/00               35 S   AERO 33 S   RMY 36
07/12 84/68/76/+4/0.00/316/35               31 WNW AERO 30 WNW RMY 32
07/13 85/65/75/+3/0.00/812/90               21 W   AERO 20 WSW RMY 20
07/14 87/68/78/+6/0.00/702/78               25 W   AERO 21 W   RMY 23
07/15 82/63/73/+1/0.00/791/88               24 WNW AERO 23 WNW RMY 22
07/16 86/65/76/+4/0.00/682/76               23 W   AERO 21 W   RMY 21
07/17 90/70/80/+8/1.32/…/..               44 W   AERO M  M   RMY 47
07/18 72/61/67/-5/0.04/…/..               33 NE  AERO 36 NE  RMY 33
07/19 89/61/75/+3/0.00/…/..               24 WSW AERO 26 SW  RMY 25
07/20 93/75/84/+12/0.00/…/..              21 WSW AERO 22 WSW RMY N/A
07/21 92/76/84/+12/0.00/…/..              31 W   AERO 35 W   RMY 31
07/22 81/64/73/+1/…./…/..               35 ENE AERO 37 ENE RMY 34
07/23 66/58/62/-10/…./…/..              30 NNE AERO 33 NNE RMY 30
07/24 77/60/69/-3/…./…/..               14 NE  AERO 15 NE  RMY N/A
07/25 80/61/71/-1/…./…/..            17 SSE AERO 23 N   RMY 17
07/26 84/62/73/+1/0.00/…/..               22 SSE AERO 23 SSE RMY 20
07/27 83/64/74/+2/…./…/..               21 S   AERO 23 S   RMY 21

07/28 Low temp since midnight is 64F; normal low is 63F

DAILY RECORDS FOR JULY 2019

7/20/19: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 75F,
BREAKS PREVIOUS RECORD OF 73F SET IN 1977, 2015

7/21/19: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 76F,
BREAKS PREVIOUS RECORD OF 75F SET IN 1991

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

RECORDS FOR JULY 28
HIGH 97F IN 1931
LOW 49F IN 1903
PRECIP 3.32 INS IN 1911
PEAK GUST 62 MPH SW IN 2006

RECORDS FOR JULY 29
HIGH 97F IN 1949
LOW 53F IN 1888,1914
PRECIP 1.53 INS IN 1901
PEAK GUST 40e MPH E IN 1941

TODAY’S REPORT PREPARED BY: Nicholas Rousseau

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