Monday, August 1, 2016

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, AUGUST 1, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME

AUGUST STARTS WITH EARLY MORNING RAIN, CLOUDY SKIES,
AND BELOW AVERAGE TEMPS

An additional 0.02 in. of rainfall after yesterday’s 1:00PM EST
observation brought the 24-hour total at 7:00AM EST to 0.17 in.
A stalled front kept the skies mostly cloudy today with low cumulus
and stratus clouds.  Temperatures had reached a max of 75F by the
1:00PM EST observation, 6F below the average temperature of 81F.

ADDITIONAL PRELIMINARY STATS FOR JULY 2016 WILL BE AVAILABLE TOMORROW

The heat wave that ended Thursday, July 28, 2016 with 92 degrees is
ranked our third longest heat wave with 7 days.  The last day of the
heat wave was also the 11th day of 90-degree heat this month. This
ranks as the second greatest total of 90-degree days for July.

BHO Longest Heat Waves (Consecutive Days with Tmax 90F or more; 1885-2016):
1) 9 days, Aug 11-19, 2002
2) 8 days, Aug 10-17, 1944
3) 7 days, Jul 22-28, 2016
4) 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
10) 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 (1885-2016):
1) 14 in 1952
2) 11 in 2016
3) 10 in 1949
10 in 1963
10 in 2010
10 in 2013
7) 9 in 1911
8) 8 in 1983
8 in 1988

Today’s Observations:

7 A.M.
Weather: Broken cumulus, broken altocumulus
Temperature: 69F; Dew Point: 64F; Wind: ENE at 10 kts
Sea-level pressure: 30.11 ins. Hg, rising, then more slowly
Visibility: 20 miles, distant fog
6-hr Max temp: 69F
6-hr Min temp: 65F
24-hr precip: 0.17 in.
BHO SA 1155 E9 BKN 74 BKN 20 195/69/64/0710/011/ DSNT FG/ 8/280 50003
MANUAL 70017 ASOS 70013 10069 20065

10 A.M.
Weather: Broken stratocumulus, overcast stratus
Temperature: 72F; Dew Point: 65F; Wind: NE at 7 kts
Sea-level pressure: 30.12 ins. Hg, falling, then rising
Visibility: 20 miles, except 40 miles ENE-SW
BHO SA 1455 E16 BKN 54 OVC 20 199/72/65/0507/012/ VSBY ENE-SW 40/
8/6// 51004

1 P.M.
Weather: Scattered cumulus, broken stratocumulus
Temperature: 74F; Dew Point: 65F; Wind: NE at 8 kts
Sea-level pressure: 30.11 ins. Hg, falling, then more quickly
Visibility: 20 miles, except 40 miles ENE-SSW
6-hr Max temp: 75F
6-hr Min temp: 69F
6-hr precipitation: 0.15 inches
BHO SA 1755 9 SCT E54 BKN 20 195/74/65/0508/011/ VSBY ENE-SSW 40/
8/500 58004 10075 20069

SUMMARY FOR SUNDAY, JULY 31, 2016

TEMPERATURE (DEGREES F)
MAX…..72   NORMAL…..81
MIN…..66   NORMAL…..63
MEAN….69   NORMAL…..72

DEPARTURE FROM 30-YEAR NORMAL…………………….-3
TOTAL DEPARTURE FOR THE MONTH……………………+99 [+3.0 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………4   DEPARTURE……….-3
TOTAL COOLING UNITS FOR THE MONTH………….317   DEPARTURE………+95
TOTAL COOLING UNITS FOR THE SEASON…………474   DEPARTURE……..+123
TOTAL COOLING UNITS LAST SEASON TO DATE…….394   DIFFERENCE……..+80

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….20  ENE  AT  10:37 P.M.
AEROVANE………………..18  ENE  AT   7:31 P.M.
ASOS……………………20  ENE  AT   7:31 P.M.
DAVIS…………………..17  NNE  AT  11:04 A.M. RMY 18
FASTEST MILE FOR YESTERDAY…………………12  NNE  AT  11:08 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………14  E    AT  10:39 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..13  NNE  AT  11:36 A.M.
AVERAGE WIND SPEED AND DIRECTION……………7.6 NE
ASOS……………………8.4
DAVIS…………………..7.0 NE [050 Deg.] *Last of several occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.17  DEPARTURE……+0.02
ASOS…………..0.13
TOTAL PRECIPITATION FOR THE MONTH……….1.52  DEPARTURE……-2.50
ASOS…………..1.40
TOTAL PRECIPITATION FOR THE YEAR……….23.21  DEPARTURE……-7.78
ASOS………….23.52

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/+3/0.01/360/40                 38 S   AERO 41 S   RMY 43
7/15 93/71/82/+10/0.00/665/74                23 W   AERO 23 W   RMY 23
7/16 93/69/81/+9/0.00/699/78                 25 WSW AERO 24 WSW RMY 24
7/17 83/72/78/+6/0.00/671/75                 18 ENE AERO 16 ENE RMY 19 TSTM
7/18 93/70/82/+10/0.05/500/56                41 WNW AERO 41 WNW RMY 43 TSTM
7/19 85/62/74/+2/0.00/802/90                 28 NW  AERO 28 NW  RMY 27
7/20 83/59/71/-1/0.00/837/94                 23 NW  AERO 23 NW* RMY 24
7/21 89/63/76/+4/0.00/852/96                 28 W   AERO 26 W   RMY N/A
7/22 96/70/83/+11/0.09/806/91                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 95/70/83/+11/0.00/…/..                26 W   AERO 26 WNW*RMY 27
7/27 94/68/81/+9/0.00/…/..                 21 ESE AERO 21 WNW RMY 19
7/28 92/71/82/+10/0.00/…/..                23 SW  AERO 22 SW  RMY 23
7/29 80/68/74/+2/0.15/…/..                 20 NNW AERO 20 NNW RMY 20
7/30 85/65/75/+3/0.41/…/..                 21 W   AERO 18 W   RMY 20
7/31 72/66/69/-3/…./…/..                 20 ENE AERO 18 ENE RMY 18

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 Low temp since midnight is 65F; normal low is now 63F

DAILY RECORDS FOR JULY 2016
7/25/16: NEW DAILY RECORD MAXIMUM TEMPERATURE OF 96F,
BREAKS 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 AUGUST 1
HIGH 97F IN 1917
LOW 49F IN 1891
PRECIP 3.61 INCHES IN 1927
PEAK GUST 41 MPH NNW IN 1985

RECORDS FOR AUGUST 2
HIGH 101F IN 1975 [STATION RECORD MAXIMUM – Tied with 8/10/1949] LOW 50 IN 1929, 1947
PRECIP 1.59 INCHES IN 1946
PEAK GUST 50 MPH SW IN 2006

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