Monday, August 27, 2018

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, AUGUST 27, 2018
ALL TIMES ARE IN EASTERN STANDARD TIME

A HAZY, DRY AND WARM DAY WITH A COOL NORTHWESTERLY BREEZE….

The visibility decreased as the day went on, dropping from 40
to 20 miles with a thickening distant haze. Humidity went from
88% this morning to 52% by 1 P.M. A cool breeze frequently
exceeding 10 mph has been blowing in from the northwest.
Temperatures rose to a maximum of 86F so far, which is
8 degrees above the daily normal of 78F. The low since
midnight is 67F, 7 degrees above the normal minimum
temperature of 60F.

Today’s Observations:

7 A.M.
Weather: Clear, few cirrostratus in all directions
Temperature: 72F; Dew Point: 68F; Wind: WNW at 7 kts
Sea-level pressure: 30.05 ins. Hg, increasing, then more slowly
Visibility: 40 miles, distant haze in all directions
6-hr Max temp: 72F
6-hr Min temp: 67F
24-hr Precip: 0.00 ins.
BHO SA 1155 CLR 40 175/72/68/3007/005/ FEW CS ALQDS DSNT HZ ALQDS/
8/008 51013 10072 20067

10 A.M.
Weather: Clear, few cumulus NE-NW, few cirrostratus
in all directions
Temperature: 81F; Dew Point: 66F; Wind: NW at 8G14 kts
Sea-level pressure: 30.06 ins. Hg, rising steadily
Visibility: 30 miles, hazy
3-hr Precip: 0.00 ins.
BHO SA 1455 CLR 30 181/81/66/3208G14/006/ FEW CU NE-NW FEW CS ALQDS
HAZY/ 8/108 51006

1 P.M.
Weather: Scattered cumulus, scattered cirrostratus
Temperature: 86F; Dew Point: 66F; Wind: WNW at 5G13 kts,
Wind: Light
Sea-level pressure: 30.05 ins. Hg, falling steadily
Visibility: 20 miles, hazy
6-hr Max temp: 86F
6-hr Min temp: 72F
6-hr Precip: 0.00 ins.
BHO SA 1755 50 SCT 250 SCT 20 177/86/66/3005G13/005/ WND LGT HAZY/
8/108 58004 10086 20072

SUMMARY FOR SUNDAY, AUGUST 26, 2018

TEMPERATURE (DEGREES F)
MAX…..81   NORMAL…..78
MIN…..59   NORMAL…..61
MEAN….70   NORMAL…..69

DEPARTURE FROM 30-YEAR NORMAL…………………….+1
TOTAL DEPARTURE FOR THE MONTH……………………+79 [+2.8 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………5  DEPARTURE………..0
TOTAL COOLING UNITS FOR THE MONTH………….234  DEPARTURE………+70
TOTAL COOLING UNITS FOR THE SEASON…………689  DEPARTURE……..+174
TOTAL COOLING UNITS LAST SEASON TO DATE…….605  DEPARTURE………+84

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY…………………21 SSW AT  2:16 P.M.
AERO……………………..20 SSW AT  2:16 P.M.
ASOS……………………..21 SSW AT  2:18 P.M.
DAVIS…………………….24 M   AT  1:34 P.M.** RMY 21
FASTEST MILE FOR YESTERDAY…………………..16 SSW AT  8:23 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………..16 SSW AT  8:31 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………….18 M   AT  2:43 P.M.**
AVERAGE WIND SPEED AND DIRECTION…………….10.3 SW
ASOS…………………….10.9
DAVIS……………………10.3 M**
** DAVIS DIRECTION MALFUNCTIONING

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.12
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….3.95  DEPARTURE……+0.47
ASOS…………..3.94
TOTAL PRECIPITATION FOR THE YEAR……….37.96  DEPARTURE……+3.67
ASOS………….39.52

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

8/1  82/66/74/+2/T/199/23           31 S   AERO 30 S   RMY 31
8/2  92/74/83/+11/0.00/761/88       30 SW  AERO 28 SW  RMY 31
8/3  88/74/81/+9/0.19/492/57        35 NW  AERO 32 NW  RMY 35 TSTM
8/4  82/69/76/+4/1.16/301/35        28 SW  AERO 25 SW  RMY 30 TSTM
8/5  89/66/78/+6/0.00/815/95        20 W   AERO 18 W   RMY 19
8/6  92/71/82/+10/0.00/822/96       20 W   AERO 16 WSW RMY N/A
8/7  92/73/83/+11/0.00/682/80       25 S   AERO 23 S   RMY 26
8/8  88/71/80/+8/0.70/460/54        25 SSW AERO 25 SSW RMY N/A TSTM
8/9  86/70/78/+6/0.07/509/60        29 SW  AERO 28 SW  RMY N/A TSTM
8/10 85/66/76/+5/T/651/77           17 NW  AERO 16 NW  RMY N/A
8/11 70/66/68/-3/…./000/00        18 SE  AERO 17 SE  RMY 18
8/12 73/66/70/-1/…./000/00        23 NNE AERO 18 NNE RMY 21
8/13 69/64/67/-4/0.17/000/00        23 ENE AERO 21 ENE RMY 21
8/14 83/69/76/+5/0.00/502/60        25 S   AERO 23 S   RMY 24
8/15 86/68/77/+6/0.00/509/61        20 W   AERO 17 W   RMY 19
8/16 87/70/79/+8/0.00/…/..        20 W   AERO 18 W   RMY 20
8/17 83/67/75/+4/…./…/..        23 SSW AERO 23 SSW RMY N/A
8/18 83/63/73/+2/…./…/..        31 NE  AERO 30 NE  RMY 33 TSTM
8/19 68/62/65/-5/…./…/..        30 NE  AERO 30 NE  RMY 32
8/20 72/61/67/-3/0.00/…/..        28 ENE AERO 25 ENE RMY 27
8/21 69/61/65/-5/T/…/..           20 ESE AERO 17 ESE RMY N/A
8/22 82/62/72/+2/…./…/..        35 WNW AERO 35 WNW RMY 35
8/23 76/60/68/-2/…./…/..        25 NW  AERO 23 NW  RMY 27
8/24 82/59/71/+1/0.00/…/..        20 SSE AERO 18 SSE RMY 20
8/25 80/59/70/+1/0.00/…/..        20 S   AERO 18 S   RMY 20
8/26 81/59/70/1/0.00/…/..         21 SSW AERO 20 SSW RMY 21

8/27 Low temp since midnight is 67F; normal low is now 60F

DAILY RECORDS FOR AUGUST 2018

08/03/18: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 74F,
BREAKS PREVIOUS RECORD OF 71F SET IN 1928, 1969, AND 1979

08/07/18: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 73F,
BREAKS PREVIOUS RECORD OF 72F SET IN 1988

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

RECORDS FOR AUGUST 27
HIGH 99F IN 1948
LOW 44F IN 1885
PRECIP 2.77 INCHES IN 1946
PEAK GUST 48 MPH NW IN 1983

RECORDS FOR AUGUST 28
HIGH 95F IN 1948
LOW 43F IN 1885
PRECIP 1.80 INCHES IN 1922
PEAK GUST 87 MPH SSE IN 1971 (DORIA)

TODAY’S REPORT PREPARED BY: Benjamin Turner