Tuesday, August 16, 2016

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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, AUGUST 16, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME

WARM FRONT BRINGS MOSTLY CLOUDY SKIES AND DISTANT SHOWERS

Skies were cloudy all day as a warm front approached with the threat of
afternoon thunderstorms. Only a trace of precip. was measured by the
1:00PM EST observation at Blue Hill. Atmospheric pressure decreased
throughout the day as dew points increased to the upper 60s. Temperatures
varied from a morning low of 69F to a maximum of 83F by 1:00PM. Visibility
dropped to 35 miles  as distant showers rolled in.

Today’s Observations:

7 A.M.
Weather: Broken altocumulus, broken altostratus
Temperature: 72F; Dew Point: 61F; Wind: Estimated NNE at 3 kts,
Wind Speed: Light
Sea-level pressure: 30.25 ins. Hg, steady, then rising
Visibility: 70 miles
6-hr Max temp: 72F
6-hr Min temp: 69F
24-hr precip: 0.00 in.
BHO SA 1155 E100 BKN 160 BKN 70 244/72/61/E0303/025/ WND LGT/ 8/030
53006 10072 20069

10 A.M.
Weather: Broken altocumulus, broken altostratus, few cumulus SE-E
Temperature: 78F; Dew Point: 63F; Wind: SE at 5 kts,
Wind Speed: Light
Sea-level pressure: 30.23 ins. Hg, falling, then less quickly
Visibility: 70 miles, distant haze
BHO SA 1455 E190 BKN 230 BKN 70 237/78/63/1405/023/ FEW CU SE-S DSNT HZ
WND LGT/ 8/130 56007

1 P.M.
Weather: Scattered stratocumulus, scattered altostratus, broken cirrostratus
Temperature: 80F; Dew Point: 67F; Wind: E at 4 kts,
Wind Speed: Light
Sea-level pressure: 29.93 ins. Hg, falling, then falling more quickly
Visibility: 35 miles
6-hr Max temp: 83F
6-hr Min temp: 71F
6-hr precip: Trace
BHO SA 1755 49 SCT 100 SCT E250 BKN 35 219/80/67/0804/993/ VSBY NE 15
DSNT SHWRS NE WND LGT/ 8/528 58018 MANUAL 600// ASOS 6//// 10083 20071

SUMMARY FOR MONDAY, AUGUST 15, 2016

TEMPERATURE (DEGREES F)
MAX…..89   NORMAL…..80
MIN…..68   NORMAL…..62
MEAN….79   NORMAL…..71

DEPARTURE FROM 30-YEAR NORMAL……………………+8
TOTAL DEPARTURE FOR THE MONTH…………………..+62 [+3.9 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..14   DEPARTURE……….+8
TOTAL COOLING UNITS FOR THE MONTH………….161   DEPARTURE………+58
TOTAL COOLING UNITS FOR THE SEASON…………635   DEPARTURE……..+181
TOTAL COOLING UNITS LAST SEASON TO DATE…….513   DIFFERENCE…….+122

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….25 W   AT 1:39 P.M.*
AEROVANE………………..24 W   AT 1:34 P.M.
ASOS……………………26 W   AT 1:39 P.M.
DAVIS…………………..23 WNW AT 1:41 P.M. RMY 28
FASTEST MILE FOR YESTERDAY…………………19 W   AT 1:40 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………20 WNW AT 1:39 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..17 W   AT 1:40 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..8.6 WNW
ASOS…………………..9.0
DAVIS………………….7.5 WNW [300 Deg.] * Last of several occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M… 0.00  DEPARTURE……-0.13
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.97  DEPARTURE……-1.13
ASOS…………..0.95
TOTAL PRECIPITATION FOR THE YEAR……….24.16  DEPARTURE……-8.93
ASOS………….24.46

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/…/..                 26 WNW AERO 25 WNW RMY 26
8/8  87/63/75/+3/0.00/…/..                 23 W   AERO 21 W   RMY 22
8/9  90/65/78/+6/0.00/…/..                 25 SSW AERO 24 SSW RMY 25
8/10 76/66/71/+0/0.28/…/..                 30 SSW AERO 31 SSW RMY 33
8/11 93/73/83/+12/T/…/..                   22 SSW AERO 21 SSW RMY 22
8/12 95/74/85/+14/0.00/…/..                30 SW  AER0 30 SW  RMY 31
8/13 77/67/72/+1/0.16/…/..                 25 NNW AERO 36 NNW RMY N/A TSTM
8/14 94/69/82/+11/0.39/…/..                39 SSW AERO 40 SSW RMY N/A TSTM
8/15 89/68/79/+8/0.00/…/..                 25 W   AERO 24 W   RMY 28

8/16 Low temp since midnight is 69F; normal low is now 62F

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

8/12/16: NEW 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 16
HIGH 95F IN 1944
LOW 50F IN 1927
PRECIP 1.47 INCHES IN 1926
PEAK GUST 45e MPH N IN 1951

RECORDS FOR AUGUST 17
HIGH 97F IN 1944
LOW 48F IN 1902
PRECIP 2.17 INCHES IN 1998
PEAK GUST 50e MPH SSW IN 1952, 50 MPH WNW IN 1962

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