Thursday, July 14, 2016

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

DAILY DISCUSSION AND CLIMATE SUMMARIES
THURSDAY, JULY 14, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME

COLD FRONT BRINGS AFTERNOON RAIN SHOWERS, GUSTY WINDS

Intermittent rain showers fell this afternoon leaving only a trace of
precipitation by 1:00PM EST.  Skies were mostly cloudy all day.  Ceilings
fell to 3,700 feet in the afternoon with the arrival of rain.

Temperatures peaked early this afternoon at 84F and dropped to 78F with
the arrival of the afternoon rain showers.  Humidity remained high with
dew points in the high 60s/low 70s.  Winds were gusty throughout the day.
A peak wind of 38 MPH S was measured at 12:11PM EST.

Today’s Observations:

7 A.M.
Weather: Few cumulus in all directions, broken altocumulus, broken cirrus
Temperature: 73F; Dew Point: 68F; Wind: S at 12G20 kts
Sea-level pressure: 29.98 ins. Hg, falling, then more quickly
Visibility: 35 miles, except 40 miles NNW-E
6-hr Max temp: 73F
6-hr Min temp: 66F
24-hr precip: 0.00 in.
BHO SA 1155 E110 BKN 250 BKN 35 152/73/68/1912G20/998/ FEW CU ALQDS
VSBY 40 NNW-E/ 8/132 58002 10073 20066

10 A.M.
Weather: Broken altocumulus, scattered cirrus
Temperature: 83F; Dew Point: 70F; Wind: S at 17G24 kts
Sea-level pressure: 29.94 ins. Hg, falling, then more slowly
Visibility: 35 miles
BHO SA 1455 E120 BKN 250 SCT 35 138/83/70/1716G24/994/ 8/031 56014

1 P.M.
Weather: Scattered cumulus, broken stratocumulus, broken stratus,
distant showers SSE-SSW
Temperature: 78F; Dew Point: 71F; Wind: S at 17G25 kts,
Peak Wind: 33 kts (38 mph) S at 12:11PM EST
Sea-level pressure: 29.90 ins. Hg, falling unsteadily
Visibility: 30 miles
6-hr Max temp: 84F
6-hr Min temp: 73F
6-hr precip: Trace
BHO SA 1755 28 SCT E37 BKN 44 BKN 30 126/78/71/1917G25/990/ SHWRS DSNT SSE-SSW
PK WND 1833/11/ 8/400 56012 MANUAL 6000/ 10084 20073

SUMMARY FOR WEDNESDAY, JULY 13, 2016

TEMPERATURE (DEGREES F)
MAX…..89   NORMAL…..81
MIN…..64   NORMAL…..63
MEAN….77   NORMAL…..72

DEPARTURE FROM 30-YEAR NORMAL……………………+5
TOTAL DEPARTURE FOR THE MONTH…………………..-14 [-0.9 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..12   DEPARTURE……….+5
TOTAL COOLING UNITS FOR THE MONTH…………..78   DEPARTURE……….-7
TOTAL COOLING UNITS FOR THE SEASON…………235   DEPARTURE………+21
TOTAL COOLING UNITS LAST SEASON TO DATE…….231   DIFFERENCE………+4

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….30 S  AT  4:38 P.M.
ASOS……………………34 S  AT  4:39 P.M.
DAVIS…………………..32 S  AT  4:38 P.M. RMY 33
FASTEST MILE FOR YESTERDAY…………………25 S  AT  4:39 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………24 S  AT  4:40 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..23 S  AT  4:39 P.M.
AVERAGE WIND SPEED AND DIRECTION………….14.1 S
ASOS………………….14.0
DAVIS…………………13.0 SSW [200 Deg.] *Last of several occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.14
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.64  DEPARTURE……-0.88
ASOS…………..0.60
TOTAL PRECIPITATION FOR THE YEAR……….22.33  DEPARTURE……-6.16
ASOS………….22.72

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

7/1  84/67/76/+6/0.20/520/57                 32 S   AERO 35 S   RMY 34 TSTM
7/2  76/61/69/-1/0.00/811/91                 31 W   AERO 34 W   RMY 32
7/3  83/57/70/-1/0.00/766/84                 23 W   AERO 23 W   RMY 23
7/4  87/61/74/+3/0.00/847/93                 28 SSW AERO 28 SSW RMY 28
7/5  80/65/73/+2/0.29/309/34                 16 S   AERO 16 S   RMY N/A
7/6  92/68/80/+9/0.00/864/95                 22 WSW AERO 24 WSW RMY 22
7/7  77/61/69/-2/0.00/…/..                 21 NE  AERO 20 ENE RMY N/A
7/8  67/58/63/-9/0.02/000/00                 25 NE  AERO 25 NE  RMY 26
7/9  64/57/61/-11/0.09/000/00                20 NE  AERO 18 NE  RMY 17
7/10 66/56/61/-11/0.04/…/..                16 NE  AERO 16 NE  RMY 16
7/11 77/56/67/-5/0.00/…/..                 20 NNE AERO 21 NNE RMY 20
7/12 86/60/73/+1/0.00/…/..                 23 S   AERO 23 S   RMY 23
7/13 89/64/77/+5/0.00/…/..                 30 S   AERO 30 S   RMY 33

7/14 low temp since midnight is 66F; normal low is now 63F

DAILY RECORDS FOR JULY 2016
None so far.

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

RECORDS FOR JULY 14
HIGH 98F IN 1952
LOW 51F IN 1895, 1937
PRECIP 1.97 INS IN 1960
WIND 110e MPH NW IN 1942 [RECORD FOR MONTH]

RECORDS FOR JULY 15
HIGH 94F IN 1995
LOW 50F IN 1929, 1930
PRECIP 1.64 INS IN 1896
WIND 71 MPH WNW IN 2002

TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle