Friday, August 26, 2016

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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, AUGUST 26, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME

HAZY DAY WITH HIGH HUMIDITY AND BRIEF RAIN SHOWER

Visibility worsened today due to hazy conditions and increased moisture in the air
with dew points in the mid 70s. Humidity decreased slightly during an afternoon rain
shower that left us with 0.25 in. of precipitation. While this amount is 0.13 in.
above the daily normal, it doesn’t make a large dent in our 9.63 in. deficit for the
year. Temperatures reached a max of 88F this afternoon, but quickly decreased again
due to the passing rain shower.

7 A.M.
Weather: Few cumulus in all directions, broken altostratus,
overcast cirrus
Temperature: 74F; Dew Point: 70F; Wind: S at 8 kts
Sea-level pressure: 29.97 ins. Hg, rising, then falling
Visibility: 10 miles, distant fog
6-hr Max temp: 74F
6-hr Min temp: 70F
24-hr precip: 0.00 in.
BHO SA 1155 E64 BNK 250 OVC 10 150/74/70/1908/997/ FEW CU ALQDS DSNT FG/
8/111 50001 10074 20070

10 A.M.
Weather: Broken altocumulus, overcast cirrus
Temperature: 79F; Dew Point: 72F; Wind: SW at 9 kts,
Sea-level pressure: 29.97 ins. Hg, falling slightly, then steady
Visibility: 10 miles, hazy
BHO SA 1455 E84 BKN 250 OVC 10 150/79/72/2309/997/ HAZY/ 8/051 55000

1 P.M.
Weather: Scattered cumulus, broken cumulus, moderate cumulus in all directions,
distant showers E and SSW
Temperature: 82F; Dew Point: 75F; Wind: SW at 3 kts,
Wind Speed: Light
Sea-level pressure: 29.95 ins. Hg, falling, then less quickly
Visibility: 30 miles, except for 10 miles N and ENE-SE, hazy
6-hr Max temp: 88F
6-hr Min temp: 74F
6-hr precip: 0.25 in.
BHO SA 1755 37 SCT E54 BKN 30 143/82/75/2303/995/ MDT CU ALQDS VSBY N AND
ENE-SE 10 HAZY DSNT SHWRS E AND SSW WND LGT/ 8/200 56007 MANUAL P0025 60025
ASOS P0024 60024 10088 20074

SUMMARY FOR THURSDAY, AUGUST 25, 2016

TEMPERATURE (DEGREES F)
MAX…..86   NORMAL…..78
MIN…..65   NORMAL…..61
MEAN….76   NORMAL…..69

DEPARTURE FROM 30-YEAR NORMAL……………………+7
TOTAL DEPARTURE FOR THE MONTH………………….+105 [+4.0 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..11   DEPARTURE……….+6
TOTAL COOLING UNITS FOR THE MONTH………….256   DEPARTURE………+97
TOTAL COOLING UNITS FOR THE SEASON…………730   DEPARTURE……..+220
TOTAL COOLING UNITS LAST SEASON TO DATE…….620   DIFFERENCE…….+110

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….28 SW  AT  11:51 A.M.
AEROVANE………………..23 SW  AT  11:51 A.M.
ASOS……………………28 SW  AT  11:52 A.M.
DAVIS…………………..26 SW  AT  11:52 A.M.  RMY 27
FASTEST MILE FOR YESTERDAY…………………21 SW  AT  11:51 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………21 SW  AT   2:04 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..20 SSW AT  12:47 P.M.
AVERAGE WIND SPEED AND DIRECTION………….13.8 SSW
ASOS………………….14.4
DAVIS…………………12.8 SSW [200 Deg.] * Last of several occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.11
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….1.53  DEPARTURE……-1.83
ASOS…………..1.52
TOTAL PRECIPITATION FOR THE YEAR……….24.72  DEPARTURE……-9.63
ASOS………….25.03

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

8/1  75/65/70/-2/0.02/320/37                 21 NE  AERO 20 ENE RMY 20
8/2  71/63/67/-5/0.12/000/00                 16 ENE AERO 16 ENE RMY 16
8/3  81/60/71/-1/0.00/603/70                 18 S   AERO 16 S   RMY 17
8/4  86/61/74/+2/0.00/833/97                 23 S   AERO 22 S   RMY 17
8/5  87/61/74/+2/0.00/823/96                 29 S   AERO 29 S   RMY 30
8/6  88/67/78/+6/T/419/49                    24 SSW AERO 23 SSW RMY 23
8/7  89/65/77/+5/0.00/784/92                 26 WNW AERO 25 WNW RMY 26
8/8  87/63/75/+3/0.00/816/96                 23 W   AERO 21 W   RMY 22
8/9  90/65/78/+6/0.00/789/93                 25 SSW AERO 24 SSW RMY 25
8/10 76/66/71/+0/0.28/017/02                 30 SSW AERO 31 SSW RMY 33
8/11 93/73/83/+12/T/666/79                   22 SSW AERO 21 SSW RMY 22
8/12 95/74/85/+14/0.00/487/58                30 SW  AERO 30 SW  RMY 31
8/13 77/67/72/+1/0.16/201/24                 25 NNW AERO 36 NNW RMY N/A TSTM
8/14 94/69/82/+11/0.39/701/84                39 SSW AERO 40 SSW RMY N/A TSTM
8/15 89/68/79/+8/0.00/758/91                 25 W   AERO 24 W   RMY 28
8/16 83/69/76/+5/0.02/125/15                 31 S   AERO 30 S   RMY N/A
8/17 84/68/76/+5/0.00/679/82                 38 W*  AERO 35 W   RMY 39
8/18 89/65/77/+6/T/635/77                    22 SW  AERO 20 SW  RMY 21
8/19 86/68/77/+7/0.00/674/82                 17 S   AERO 16 SSE RMY 17
8/20 86/65/76/+6/0.00/754/92                 25 S   AERO 23 S   RMY 25
8/21 87/63/75/+5/0.54/727/89                 25 S   AERO 22 SSE RMY N/A
8/22 78/59/69/-1/0.00/…/..                 31 NW  AERO 29 NW  RMY 32
8/23 80/54/67/-3/0.00/…/..                 23 WSW AERO 21 WSW RMY 23
8/24 87/62/75/+5/0.00/…/..                 22 W   AERO 18 W   RMY 20
8/25 86/65/76/+7/0.00/…/..                 28 SW  AERO 23 SW  RMY 27

8/26 Low temp since midnight is 70F; normal low is now 61F

DAILY RECORDS FOR AUGUST 2016
8/11/16: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 73F,
TIES PREVIOUS RECORD SET IN 1900 AND 1988

8/12/16: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 74F,
TIES PREVIOUS RECORD SET IN 1988

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

RECORDS FOR AUGUST 26
HIGH 96F IN 1900, 1948
LOW 46F IN 1885
PRECIP 5.85 INCHES IN 1924
PEAK GUST 55e MPH NNW IN 1947

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

TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle and Lizzy Suzedell