Monday, August 3, 2015
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, AUGUST 3, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME
HEAT AND HUMIDITY BEGIN TO BUILD AHEAD OF
APPROACHING COLD FRONT
Fog, which formed overnight, quickly dissipated this
morning before the 7:00 AM EST observation revealing
mostly clear but hazy conditions. Temperatures have risen
sharply from an overnight low of 68F.
By the 1:00 PM EST observation skies were mostly sunny
with a few small cumulus in all directions. Visibility
was 40 miles in all directions with haze and rising humidity.
Winds had picked up from the SSW gusting to 30 MPH at
12:45 PM EST. Temperatures had risen to a maximum of 89F.
PRELIMINARY STATS FOR JULY 2015
TEMPERATURE, Deg. F
Avg. Max. 82.2 [+1.4]
Avg. Min. 63.6 [+0.7]
Mean 72.9 [+1.0]
Corrected mean: 72.4
Max. for month: 92 on 29th
Min. for month: 56 on 16th, 17th
HEATING DEGREE DAYS
Total heating units: 1 [-8]
Total for the season: 1 [-8]
Total for last season: 0
COOLING DEGREE DAYS
Total cooling units: 256 [+34]
Total for the season: 394 [+43]
Total for last season: 337
PRECIPITATION, Inches
Total: 3.09 [-0.93]
Greatest in 24 hrs: 2.03, 9-10th
WIND, mph
Avg. uncorrected wind speed: 9.6
Avg. corrected wind speed: 10.2
Prevailing wind direction: S @ 14%
Peak gust and direction: 35 S on the 7th
SUNSHINE:
Campbell-Stokes card minutes: 16452 / 26682 or 62%
Astronomical total minutes: 17101 / 27760 or 62%
Today’s Observations:
7 A.M.
Weather: Clear, few cumulus fractus ENE-SSW, few
cirrus distant WSW-N
Temperature: 73F; Dew Point: 69F; Wind: SSW at 7 kts
Sea-level pressure: 29.88 ins. Hg, rising then rising more slowly
Visibility: 25 miles, obscured by thin fog and hazy
6-hr Max temp: 73F
6-hr Min temp: 68F
24-hr precip: 0.00
BHO SA 1155 CLR 25 118/73/69/2007/988/ FEW CUFRA ENE-SSW ALQDS
FEW CI DSNT WSW-N THN FG HAZY/ 8/701 51007 10073 20068
10 A.M.
Weather: Clear, few small cumulus NW-WSW
Temperature: 84F; Dew Point 58F; Wind: SW at 16G22 kts
Sea-level pressure: 29.86 ins. Hg, falling steadily
Visibility: 40 miles, hazy
BHO SA 1455 CLR 40 112/84/58/2216G22/986/ FEW SML CU NW-WSW HAZY/
8/100 57006
1 P.M.
Weather: Clear, few small cumulus in all directions,
few cirrus distant ESE-S
Temperature: 89F; Dew Point: 60F; Wind: SSW at 15G26 kts
Peak Wind: 26 knots SSW @ 12:45 PM EST
Sea-level pressure: 29.83 ins. Hg, falling, then more quickly
Visibility: 40 miles, hazy
6-hr Max temp: 89F
6-hr Min temp: 73F
BHO SA 1755 CLR 40 100/89/60/2015G26/983/ FEW SML CU ALQDS FEW CI
DSNT ESE-S HAZY PK WND 2026/45/ 8/101 58012 10089 20073
SUMMARY FOR SUNDAY, AUGUST 2, 2015
TEMPERATURE (DEGREES F)
MAX…..86 NORMAL…..81
MIN…..62 NORMAL…..63
MEAN….74 NORMAL…..72
DEPARTURE FROM 30-YEAR NORMAL……………………+2
TOTAL DEPARTURE FOR THE MONTH……………………+8 [+3.8 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………9 DEPARTURE……….+2
TOTAL COOLING UNITS FOR THE MONTH…………..22 DEPARTURE……….+8
TOTAL COOLING UNITS FOR THE SEASON…………416 DEPARTURE………+51
TOTAL COOLING UNITS LAST SEASON TO DATE…….347 DIFFERENCE……..+69
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….24 SW AT 2:40 P.M.
ASOS……………………25 W AT 4:04 P.M.
DAVIS…………………..22 SSW AT 12:07 P.M. RMY N/A
FASTEST MILE FOR YESTERDAY…………………17 W AT 4:05 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………18 W AT 3:20 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..15 SSW AT 12:09 P.M.
AVERAGE WIND SPEED AND DIRECTION………….10.9 W
ASOS………………….10.8
DAVIS………………….8.3 SW [232 deg.]
* Last of several occurrences…
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…..0.00 DEPARTURE…..-0.15
ASOS……………0.00
TOTAL PRECIPITATION FOR THE MONTH………..0.06 DEPARTURE…..-0.24
ASOS……………0.06
TOTAL PRECIPITATION FOR THE YEAR………..27.42 DEPARTURE…..-3.87
ASOS……………N/A ***
*** ASOS annual total not available due to erroneous readings
PRELIMINARY CLIMATE SUMMARY FOR JULY-AUGUST CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/RMY 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 80/63/72/+2/0.59/466/51 30 SSE RMY 33 TSTM
7/2 78/60/69/-1/0.00/721/79 23 WNW RMY N/A
7/3 79/58/69/-2/0.00/867/95 17 SSW RMY 17
7/4 74/61/68/-3/T/109/12 16 S RMY N/A
7/5 82/58/70/-1/0.00/865/95 20 WSW RMY 20
7/6 85/64/75/+4/0.00/755/83 20 S RMY 21
7/7 84/65/75/+4/0.02/445/49 35 S RMY 40
7/8 87/68/78/+6/T/372/41 23 NE RMY N/A
7/9 73/61/67/-5/0.08/390/43 24 NE RMY 25
7/10 80/59/70/-2/1.95/535/59 18 W RMY N/A TSTM
7/11 84/61/73/+1/0.00/868/96 21 NW RMY 19
7/12 88/67/78/+6/0.00/813/90 20 W RMY 17
7/13 82/66/74/+2/0.00/424/47 21 E RMY 20
7/14 81/64/73/+1/…./396/44 25 S RMY 27
7/15 84/61/73/+1/…./297/33 24 ENE RMY 26
7/16 72/56/64/-8/0.00/852/95 25 NNE RMY 24
7/17 79/56/68/-4/0.00/708/79 21 S RMY N/A
7/18 76/63/70/-2/0.16/027/03 29 SSW RMY 30 TSTM
7/19 89/68/79/+7/0.01/509/57 25 SSW RMY 27
7/20 90/73/82/+10/0.00/793/89 24 W RMY 26
7/21 87/70/79/+7/T/267/30 24 W RMY 25
7/22 82/64/73/+1/T/727/82 24 WNW RMY 26
7/23 81/62/72/+0/0.00/753/85 22 W RMY 23
7/24 80/60/70/-2/T/663/75 23 N RMY 25
7/25 71/59/65/-7/0.00/265/30 20 ENE RMY N/A
7/26 78/59/69/-3/T/018/02 24 SSE RMY 25 TSTM
7/27 84/67/76/+4/T/378/43 24 S RMY N/A TSTM
7/28 89/68/79/+7/0.00/604/69 18 S RMY N/A
7/29 92/70/81/+9/0.00/830/95 21 W RMY N/A
7/30 89/72/81/+9/0.10/514/59 31 S RMY N/A
7/31 87/68/78/+6/0.00/870/100 28 W RMY N/A
8/1 88/68/78/+6/0.06/…/.. 28 WNW RMY N/A
8/2 86/62/74/+2/0.00/…/.. 24 SW RMY N/A
8/3 low since midnight is 68F; normal low is now 63F
DAILY RECORDS FOR JULY 2015
7/10 – RECORD DAILY PRECIPITATION OF 1.95 INCHES,
surpasses previous record of 1.68 in. in 1933
7/20 – RECORD DAILY HIGH MINIMUM TEMPERATURE OF 73F,
ties previous record of 73F in 1977
DAILY RECORDS FOR AUGUST 2015
None so far.
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR AUGUST 3
HIGH 96F IN 1930
LOW 50F IN 1976
PRECIP 1.45 INCHES IN 1979
PEAK GUST 52 MPH NW IN 2008 [TSTM]
RECORDS FOR AUGUST 4
HIGH 95F IN 1928
LOW 48F IN 1900
PRECIP 1.68 INS IN 1983
PEAK GUST 48 MPH SW IN 1974
TODAY’S REPORT PREPARED BY: Brian Fitzgerald
