Monday, July 31, 2017
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, JULY 31, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME
SEASONABLE SUMMER DAY WITH MOSTLY CLEAR SKIES
As pressure continues to build, near-normal temperatures
have returned to Blue Hill. The max. by 1:00PM was 82F,
and the mostly sunny skies could very well allow the max.
to jump a couple more degrees before the end of the day.
Dew points were slightly higher than yesterday and measured
in the mid- to upper-50s.
Skies have remained mostly clear at each observation with
distant cirrostratus or few cumulus. Wind speeds have again
been light with variable with direction through the morning
and early afternoon.
Today’s Observations:
7 A.M.
Weather: Few cirrostratus E-S, mountains looming NW
Temperature: 65F; Dew Point: 56F; Wind: NNW at 5 kts,
Wind speed: Light
Sea-level pressure: 30.08 ins. Hg, rising unsteadily
Visibility: 70 miles
6-hr Max temp: 65F
6-hr Min temp: 60F
24-hr precip: 0.00 in.
BHO SA 1155 CLR 70 185/65/56/3305/008/ FEW CS E-S LOOMING OF
MTNS NW WND LGT/ 8/005 52008 10065 20060
10 A.M.
Weather: Few cumulus E-SW, few cirrostratus E-S
Temperature: 77F; Dew Point: 57F; Wind: estimated WNW at 3 kts,
Wind speed: Light
Sea-level pressure: 30.08 ins. Hg, steady then rising
Visibility: 70 miles
BHO SA 1455 CLR 70 186/77/57/E3003/008/ FEW CU E-SW FEW CS E-S
WND LGT/ 8/105 50001
1 P.M.
Weather: Few cumulus SE-SW, few cirrostratus E-S and WSW-NNW
Temperature: 81F; Dew Point: 53F; Wind: estimated W at 2 kts,
Wind: Light and variable
Sea-level pressure: 30.05 ins. Hg, falling, then more quickly
Visibility: 70 miles
6-hr Max temp: 82F
6-hr Min temp: 65F
BHO SA 1755 CLR 70 176/81/53/E2602/005/ FEW CU SE-SW FEW CS E-S
AND WSW-NNW WND L/V/ 8/105 58010 10082 20065
SUMMARY FOR SUNDAY, JULY 30, 2017
TEMPERATURE (DEGREES F)
MAX…..76 NORMAL…..81
MIN…..55 NORMAL…..63
MEAN….66 NORMAL…..72
DEPARTURE FROM 30-YEAR NORMAL…………………….-6
TOTAL DEPARTURE FOR THE MONTH……………………-13 [-0.6 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………1 DEPARTURE……….-6
TOTAL COOLING UNITS FOR THE MONTH………….212 DEPARTURE……….-3
TOTAL COOLING UNITS FOR THE SEASON…………413 DEPARTURE………+69
TOTAL COOLING UNITS LAST SEASON TO DATE…….470 DEPARTURE………-57
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….18 SSW AT 11:04 P.M.*
AERO……………………18 SSW AT 11:04 P.M.
ASOS……………………19 SSW AT 11:03 P.M.
DAVIS…………………..19 SSW AT 11:03 P.M. RMY 19
FASTEST MILE FOR YESTERDAY…………………15 SSW AT 11:02 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………16 SSW AT 11:04 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..16 SSW AT 11:04 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..9.3 N
ASOS…………………..9.1
DAVIS………………….7.8 NNE [033 DEG.]
*last of multiple occurrences
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00 DEPARTURE……-0.16
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….3.39 DEPARTURE……-0.48
ASOS…………..3.41
TOTAL PRECIPITATION FOR THE YEAR……….34.76 DEPARTURE……+3.92
ASOS……………N/A ***
*** ASOS annual total not available due to erroneous readings
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
M: Missing data
7/1 85/67/76/+6/T/439/48 35 S AERO 37 S RMY 38
7/2 87/69/78/+8/T/785/86 25 W* AERO 28 W* RMY 27
7/3 85/67/76/+5/0.00/894/98 28 W* AERO 29 W RMY 30
7/4 84/62/73/+2/0.00/783/86 17 W AERO 17 W RMY 18
7/5 82/62/72/+1/0.00/855/94 20 S AERO 20 ENE RMY 20
7/6 82/60/71/+0/0.00/664/73 21 SSW AERO 22 SSW RMY 21
7/7 71/60/66/-5/0.63/000/00 28 ENE AERO 28 ENE RMY 27
7/8 84/61/73/+1/0.15/463/51 30 SW* AERO 32 SSW RMY 33 TSTM
7/9 81/60/71/-1/0.00/897/99 26 W AERO 26 W RMY 26
7/10 85/63/74/+2/T/751/83 25 SW AERO 25 S RMY 26
7/11 82/66/74/+2/0.25/253/28 24 S AERO 24 S RMY N/A
7/12 85/68/77/+5/0.43/325/36 23 NE AERO 22 NE RMY 23 TSTM
7/13 68/55/62/-10/0.03/000/00 28 NNE AERO 28 NE RMY 29
7/14 63/56/60/-12/0.02/000/00 15 E AERO 14 E RMY 14
7/15 80/60/70/-2/0.00/296/33 18 S AERO 16 S RMY 18
7/16 87/64/76/+4/0.00/852/95 18 SSE AERO 16 E RMY 17
7/17 84/68/76/+4/0.00/680/76 25 S AERO 25 S* RMY 25
7/18 85/68/77/+5/0.07/500/56 23 S AERO 23 S RMY 23
7/19 90/70/80/+8/0.00/794/89 22 SW AERO 22 SW* RMY 22
7/20 90/70/80/+8/0.00/623/70 21 WSW AERO 22 WSW RMY 21
7/21 90/68/79/+7/0.00/835/94 26 W AERO 26 W RMY 27
7/22 87/70/79/+7/T/266/30 20 WNW AERO 20 WNW RMY N/A
7/23 72/61/67/-5/T/681/77 33 NE AERO 32 NE RMY 33
7/24 62/54/58/-14/1.74/000/00 38 NE AERO 37 ENE RMY 38
7/25 63/54/59/-13/0.03/203/23 23 NNE AERO 21 NNE RMY N/A
7/26 79/55/67/-5/0.00/703/80 21 S* AERO 22 SSE RMY N/A
7/27 72/59/66/-6/0.04/…/.. 21 SSW AERO 23 SW RMY 22
7/28 82/64/73/+1/…./…/.. 16 W AERO 17 N RMY N/A
7/29 67/56/62/-10/0.00/…/.. 30 NNE AERO 32 NNE RMY 33
7/30 76/55/66/-6/0.00/…/.. 18 SSW*AERO 18 SSW RMY 19
7/31 Low temp since midnight is 60F; normal low is now 63F
DAILY RECORDS FOR JULY
7/24/17: DAILY RECORD LOW MAXIMUM TEMPERATURE OF 62F,
TIES PREVIOUS RECORD SET IN 1904 AND TIED IN 1964
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR JULY 31
HIGH 95F IN 1917
LOW 50F IN 1895,1918
PRECIP 1.34 INS IN 1892
PEAK GUST 43e MPH WNW SW IN 1953, 43 SW IN 1971
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
TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle
