Friday, July 15, 2016

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

DAILY DISCUSSION AND CLIMATE SUMMARIES
FRIDAY, JULY 15, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME

HOT AND HUMID CONDITIONS CONTINUE

It was another hot and humid day with hazy conditions which limited
visibility to 40 miles.  The overnight low of 71F is 8F above average.
Temperatures peaked to 92F before the 1:00PM EST observation just 2F below
the daily record of 94F last seen in 1999.

Yesterday’s afternoon rain showers gave us a total of 0.01 in. of precip.
We are now 1.01 in. below normal for the month and 6.29 in. below normal
for the year.

Today’s Observations:

7 A.M.
Weather: Few cirrocumulus SSW-WNW, scattered cirrostratus
Temperature: 77F; Dew Point: 71F; Wind: WSW at 6 kts,
Wind: Light and variable
Sea-level pressure: 29.86 ins. Hg, rising, then more slowly
Visibility: 20 miles
6-hr Max temp: 77F
6-hr Min temp: 71F
24-hr precip: 0.01 in.
BHO SA 1155 250 SCT 20 113/77/71/2506/986/ FEW CC SSW-WNW DSNT FG WND L/V/
8/008 51014 ASOS 70001 MANUAL 70001 10077 20071

10 A.M.
Weather: Few altocumulus NW-WNW and ENE-SE, scattered cirrostratus
Temperature: 89F; Dew Point: 64F; Wind: W at 6 kts,
Wind: Light and variable
Sea-level pressure: 29.87 ins. Hg, falling, then rising
Visibility: 40 miles, hazy
BHO SA 1455 180 SCT 40 116/89/64/2606/987/ FEW AC NW-WNW AND ENE-SE HAZY
WND L/V/ 8/088 51003

1 P.M.
Weather: Scattered stratocumulus, broken altocumulus
Temperature: 90F; Dew Point: 62F; Wind: W at 8G16 kts
Sea-level pressure: 29.85 ins. Hg, falling, then more slowly
Visibility: 40 miles, hazy
6-hr Max temp: 92F
6-hr Min temp: 77F
6-hr precip: Trace
BHO SA 1755 64 SCT E100 BKN 40 108/90/62/2808G16/985/ HAZY/
8/460 56008 10092 20077

SUMMARY FOR THURSDAY, JULY 14, 2016

TEMPERATURE (DEGREES F)
MAX…..84   NORMAL…..81
MIN…..66   NORMAL…..63
MEAN….75   NORMAL…..72

DEPARTURE FROM 30-YEAR NORMAL……………………+3
TOTAL DEPARTURE FOR THE MONTH…………………..-11 [-0.6 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..10   DEPARTURE……….+3
TOTAL COOLING UNITS FOR THE MONTH…………..88   DEPARTURE……….-5
TOTAL COOLING UNITS FOR THE SEASON…………245   DEPARTURE………+23
TOTAL COOLING UNITS LAST SEASON TO DATE…….239   DIFFERENCE………+6

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….38 S   AT  12:11 P.M.
ASOS……………………42 SSW AT  12:11 P.M.
DAVIS…………………..40 SSW AT  12:10 P.M. RMY 43
FASTEST MILE FOR YESTERDAY…………………29 S   AT  12:07 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………31 SSW AT  12:09 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..29 S   AT  12:10 P.M.
AVERAGE WIND SPEED AND DIRECTION………….16.3 S
ASOS………………….16.0
DAVIS…………………14.8 S [190 Deg.] *Last of several occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.01  DEPARTURE……-0.13
ASOS…………..0.01
TOTAL PRECIPITATION FOR THE MONTH……….0.65  DEPARTURE……-1.01
ASOS…………..0.61
TOTAL PRECIPITATION FOR THE YEAR……….22.34  DEPARTURE……-6.29
ASOS………….22.73

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 84/71/75/+3/…./…/..                 38 S   AERO 41 S   RMY 43

7/15 low temp since midnight is 71F; 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 15
HIGH 94F IN 1995
LOW 50F IN 1929, 1930
PRECIP 1.64 INS IN 1896
WIND 71 MPH WNW IN 2002

RECORDS FOR JULY 16
HIGH 94F IN 1968, 1980, 1983, 1999
LOW 50F IN 1889, 1903
PRECIP 0.97 INS IN 2014
WIND 48e MPH SW 1944

TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle