BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, JULY 26, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME
DEW POINTS DROP TO 50s, WIND DIRECTIONS CHANGES TO WEST AND
VISIBILITY CLEARS TO 70+ MILES
Temperatures reached above 90F again today with a max. temp. at the 1:00PM
EST ob. reading 93F. At 5 consectutive days above 90F, July 22-26 now ties
with 6 other time periods for ninth longest heat wave at BHO. July 2016
also ties with July 1911 for the sixth greatest number of 90-Degree Days
with 9 days.
Winds shifted to out of the west shortly before midnight. Visibility was much
clearer today maintaining 70 miles at each observation. Dew points dropped
to the upper 50s by late morning.
BHO Longest Heat Waves (Consecutive Days with Tmax 90F or more; 1885-2015):
1) 9 days, Aug 11-19, 2002
2) 8 days, Aug 10-17, 1944
3) 6 days, Aug 28 – Sep 2, 1953
6 days, Jul 24-29, 1963
6 days, Jul 16-21, 1977
6 days, Jul 6-11, 1988
6 days, Jul 16-21, 1991
6 days, Jul 15-20, 2013
9) 5 days, Jul 2-6, 1911
5 days, Jul 7-11, 1912
5 days, Aug 25-29, 1948
5 days, Aug 7-11, 1949
5 days, Jul 15-19, 1982
5 days, Jul 14-18, 2012
BHO July Greatest Number of 90-Degree Days (1885-2015):
1) 14 in 1952
2) 10 in 1949
10 in 1963
10 in 2010
10 in 2013
6) 9 in 1911
7) 8 in 1983
8 in 1988
Today's Observations:
7 A.M.
Weather: Few cirrus, NE-SW
Temperature: 77F; Dew Point: 67F; Wind: WNW at 9 kts
Sea-level pressure: 29.82 ins. Hg, rising, then steady
Visibility: 70 miles, distant haze
6-hr Max temp:77F
6-hr Min temp: 70F
24-hr precip: 0.00 in.
BHO SA 1155 CLR 70 099/77/67/2909/982/ FEW CI NE-SW DSNT HZ/
8/001 51009 10077 20070
10 A.M.
Weather: Scattered cumulus
Temperature: 87F; Dew Point: 59F; Wind: WNW at 14G20 kts
Sea-level pressure: 29.80 ins. Hg, falling, then more quickly
Visibility: 70 miles
BHO SA 1455 44 SCT 70 093/87/59/2914G20/980/ 8/100 56006
1 P.M.
Weather: Scattered cumulus
Temperature: 93F; Dew Point: 57F; Wind: W at 10G16 kts
Sea-level pressure: 29.79 ins. Hg, steady, then falling
Visibility: 70 miles
6-hr Max temp: 93F
6-hr Min temp: 77F
BHO SA 1755 59 SCT 70 088/93/57/2710G16/979/ WND 23V30/
8/100 58005 10093 20077
SUMMARY FOR MONDAY, JULY 25, 2016
TEMPERATURE (DEGREES F)
MAX.....96 NORMAL.....81
MIN.....70 NORMAL.....63
MEAN....83 NORMAL.....72
DEPARTURE FROM 30-YEAR NORMAL........................+11
TOTAL DEPARTURE FOR THE MONTH........................+67 [+2.5 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY..............18 DEPARTURE.........+10
TOTAL COOLING UNITS FOR THE MONTH.............243 DEPARTURE.........+66
TOTAL COOLING UNITS FOR THE SEASON............400 DEPARTURE.........+94
TOTAL COOLING UNITS LAST SEASON TO DATE.......320 DIFFERENCE........+80
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY...................25 S AT 3:43 P.M.
AEROVANE....................28 S AT 3:41 P.M.
ASOS........................27 S AT 3:43 P.M.
DAVIS.......................25 S AT 3:35 P.M. RMY 27
FASTEST MILE FOR YESTERDAY.....................21 S AT 3:44 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE..................20 S AT 7:42 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE.................19 S AT 3:36 P.M.
AVERAGE WIND SPEED AND DIRECTION...............9.8 S
ASOS.......................10.0
DAVIS.......................8.9 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..........0.79 DEPARTURE......-2.34
ASOS..............0.74
TOTAL PRECIPITATION FOR THE YEAR..........22.48 DEPARTURE......-7.62
ASOS.............22.86
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/-2/0.00/409/45 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/-11/0.04/000/00 16 NE AERO 16 NE RMY 16
7/11 77/56/67/-5/0.00/415/46 20 NNE AERO 21 NNE RMY 20
7/12 86/60/73/+1/0.00/848/94 23 S AERO 23 S RMY 23
7/13 89/64/77/+5/0.00/874/97 30 S AERO 30 S RMY 33
7/14 84/66/75/+3/0.01/.../.. 38 S AERO 41 S RMY 43
7/15 93/71/82/+10/0.00/.../.. 23 W AERO 23 W RMY 23
7/16 93/69/81/+9/0.00/.../.. 25 WSW AERO 24 WSW RMY 24
7/17 83/72/78/+6/0.00/.../.. 18 ENE AERO 16 ENE RMY 19 TSTM
7/18 93/70/82/+10/0.05/.../.. 41 WNW AERO 41 WNW RMY 43 TSTM
7/19 85/62/74/+2/0.00/.../.. 28 NW AERO 28 NW RMY 27
7/20 83/59/71/-1/0.00/.../.. 23 NW AERO 23 NW* RMY 24
7/21 89/63/76/+4/0.00/.../.. 28 W AERO 26 W RMY N/A
7/22 96/70/83/+11/0.09/.../.. 33 SW AERO 35 SW RMY 35 TSTM
7/23 95/68/82/+10/T/.../.. 45 NNW AERO 48 NNW RMY 44
7/24 91/64/78/+6/0.00/.../.. 20 WNW AERO 20 W* RMY 20
7/25 96/70/83/+11/0.00/.../.. 25 S AERO 28 S RMY 27
7/26 Low temp since midnight is 70F; normal low is now 63F
DAILY RECORDS FOR JULY 2016
7/25/16: DAILY RECORD MAXIMUM TEMPERATURE OF 96F, SURPASSES
PREVIOUS RECORD OF 94F SET IN 1963 AND 1987.
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR JULY 26
HIGH 97F IN 1963
LOW 47F IN 1920
PRE 2.05 INS IN 1899
WIND 74e MPH NNW IN 1940
RECORDS FOR JULY 27
HIGH 95F IN 1949, 1963
LOW 50F IN 1920, 2001
PRE 4.01 INS IN 1979
WIND 47 MPH ENE IN 1984
TODAY'S REPORT PREPARED BY: Cecilia Borries-Strigle / Lizzy Suzedell / Mike Iacono