Saturday, August 3, 2019

| August 4, 2019 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, AUGUST 3, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

SEASONABLE AND FAIR WITH DECREASING CLOUDS….

We observed hazy conditions throughout the day,
limiting visibility to a maximum of 30 miles.
Cloud cover decreased from morning to afternoon,
with a drop in humidity from 85% to 60%. Wind has
been southwesterly, blowing at an average speed of
10 mph. The high so far today is 83F, 2 degrees
above the daily normal maximum of 81F. The low
since midnight is 66F, 3 degrees above the normal
low of 63F.

Today’s Observations:

7 A.M.
Weather: Broken altocumulus
Temperature: 71F; Dew Point: 66F; Wind: SW at 8 kts
Sea-level pressure: 30.07 ins. Hg, steady
Visibility: 30 miles, haze
6-hr Max temp: 71F
6-hr Min temp: 66F
24-hr Precip: 0.00 ins.
BHO SA 1155 150 BKN 30 184/71/66/2108/007/ HAZY/
8/070 50000 10071 20066

10 A.M.
Weather: Broken altocumulus
Temperature: 72F; Dew Point: 66F; Wind: SW at 10G14 kts
Sea-level pressure: 30.05 ins. Hg, falling steadily
Visibility: 25 miles, haze
3-hr Precip: 0.00 ins.
BHO SA 1455 110 BKN 25 177/72/66/2310G14/005/ HAZY/
8/070 56007

1 P.M.
Weather: Scattered cumulus, broken altocumulus
Temperature: 83F; Dew Point: 67F; Wind: SW at 9G16 kts
Sea-level pressure: 29.99 ins. Hg, falling steadily
Visibility: 25 miles, haze
6-hr Max temp: 83F
6-hr Min temp: 71F
6-hr Precip: 0.00 ins.
BHO SA 1755 50 SCT 110 25 158/83/67/2109G16/999/ HAZY/
8/870 58019 10083 20071

SUMMARY FOR FRIDAY, AUGUST 2, 2019

TEMPERATURE (DEGREES F)
MAX…..83   NORMAL…..81
MIN…..61   NORMAL…..63
MEAN….72   NORMAL…..72

DEPARTURE FROM 30-YEAR NORMAL………………….0
TOTAL DEPARTURE FOR THE MONTH………………….3 [+1.3 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………7   DEPARTURE……….0
TOTAL COOLING UNITS FOR THE MONTH………….111   DEPARTURE………+3
TOTAL COOLING UNITS FOR THE SEASON…………428   DEPARTURE……..+63
TOTAL COOLING UNITS LAST SEASON TO DATE…….482   DEPARTURE……..-54

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..18 WSW AT  1:09 P.M.
AERO…………………….18 WSW AT  8:30 P.M.
ASOS…………………….17 S   AT  8:15 P.M.
DAVIS……………………19 S   AT  7:37 P.M. RMY 18
FASTEST MILE FOR YESTERDAY………………….13 WSW AT  7:34 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….13 SSW AT 11:50 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………14 SSE AT  7:37 P.M.
AVERAGE WIND SPEED AND DIRECTION……………7.7 N
ASOS……………………8.1
DAVIS…………………..8.1 WNW [301 deg.]

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……….0.00  DEPARTURE……-0.30
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE YEAR……….35.33  DEPARTURE……+4.04
ASOS………….35.28

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 89/64/77/+5/…./…/..               25 WSW AERO 36 WSW RMY 26
07/29 89/71/80/+8/…./…/..               23 W   AERO 25 W   RMY 21
07/30 93/71/82/+10/0.00/…/..              24 S   AERO 24 S   RMY 23
07/31 90/68/79/+7/0.55/…/..               37 SW  AERO 35 SW  RMY 38

PRELIMINARY CLIMATE SUMMARY FOR AUGUST 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

8/01   84/66/75/3/…./…/..                18 NNW AERO 20 NW  RMY 17
8/02   83/61/72/0/…./…/..                18 WSW AERO 18 WSW RMY 18

8/03 Low temp since midnight is 61F; 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 AUGUST 3
HIGH 96F IN 1930
LOW 50F IN 1976
PRECIP 1.45 INCHES IN 1979
PEAK GUST 52 MPH NW IN 2008 [TSTM]

RECORDS FOR AUGUST 4
HIGH 95F IN 1928
LOW 48F IN 1900
PRECIP 1.68 INS IN 1983
PEAK GUST 48 MPH SW IN 1974

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

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