Thursday, July 9, 2015
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, JULY 9, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME
ONLY A TRACE OF RAIN WEDNESDAY, AS HEAT AND
HUMIDITY COME TO AN END
Yesterday’s trace of rain fell after 8:00 AM EST,
with heavier showers and thunderstorms staying to our
south yesterday afternoon and evening. Precipitation for
the month, still at 0.61 inches, is now 0.27 inches below
the norm so far for the month of July, with a deficit
of 2.84 inches for the year.
A northeasterly flow off the ocean has kept temperatures
in a much more comfortable range, topping out at 72F by
the 1:00 PM EST observation with mostly cloudy skies
this morning.
PRELIMINARY STATS FOR JUNE 2015
TEMPERATURE, Deg. F
Avg. Max. 72.9 [-2.1]
Avg. Min. 55.8 [-1.3]
Mean 64.4 [-1.7]
Corrected mean: 63.9
Max. for month: 86 on 6/12
Min. for month: 44 on 6/2 and 6/3
HEATING DEGREE DAYS
Total heating units: 100 [+27]
Total for the season: 6504 [+128]
Total for last season: 6422
COOLING DEGREE DAYS
Total cooling units: 89 [-16]
Total for the season: 138 [+9]
Total for last season: 109
PRECIPITATION, Inches
Total: 4.90 [+0.59]
Greatest in 24 hrs: 1.51 from 6/27-28
WIND, mph
Avg. uncorrected wind speed: 10.4
Avg. corrected wind speed: 10.9
Prevailing wind direction: S @ 12%
Peak gust and direction: 41 SSW on the 8th
SUNSHINE:
Astronomical total minutes: 12,941 out of 27,416 possible, or 47%
Campbell-Stokes card minutes: 12,450 out of 26,376 possible, or 47%
Today’s Observations:
7 A.M.
Weather: Broken altocumulus, broken cirrostratus,
virga overhead
Temperature: 64F; Dew Point: 57F; Wind: NE at 9 kts
Sea-level pressure: 30.03 ins. Hg, rising, then falling but higher still
Visibility: 10 miles, thin fog in all directions
6-hr Max temp: 66F
6-hr Min temp: 62F
24-hr precip: Trace
BHO SA 1155 E220 BKN 280 BKN 10 170/64/57/0509/003/
VIRGA OVHD THN FG ALQDS/ 8/038 51004 10066 20062
10 A.M.
Weather: Scattered altocumulus, broken cirrus
Temperature: 68F; Dew Point: 58F; Wind: estimated NE at 6 kts
Wind Speed: Light
Sea-level pressure: 30.02 ins. Hg, falling, then rising but lower
Visibility: 12 miles, thin fog in all directions
BHO SA 1455 160 SCT E200 BKN 12 167/68/58/E0506/002/
THN FG ALQDS WND LGT/ 8/031 55003
1 P.M.
Weather: Scattered altocumulus, broken cirrocumulus,
few cumulus distant S
Temperature: 72F; Dew Point: 56F; Wind: NE at 7 kts,
Sea-level pressure: 29.98 ins. Hg, falling, then more quickly
Visibility: 20 miles, hazy, thin fog in all directions
6-hr Max temp: 72F
6-hr Min temp: 64F
BHO SA 1755 150 SCT E220 BKN 20 152/72/56/0507/998/
FEW CU DSNT S THN FG ALQDS HAZY/ 8/139 58015 10072 20064
SUMMARY FOR WEDNESDAY, JULY 8, 2015
TEMPERATURE (DEGREES F)
MAX…..87 NORMAL…..80
MIN…..68 NORMAL…..63
MEAN….78 NORMAL…..72
DEPARTURE FROM 30-YEAR NORMAL……………………+6
TOTAL DEPARTURE FOR THE MONTH……………………+9 [+0.9 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..13 DEPARTURE……….+6
TOTAL COOLING UNITS FOR THE MONTH…………..56 DEPARTURE……….+5
TOTAL COOLING UNITS FOR THE SEASON…………194 DEPARTURE………+14
TOTAL COOLING UNITS LAST SEASON TO DATE…….184 DIFFERENCE………10
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….23 NE AT 11:34 P.M.
ASOS……………………24 ENE AT 11:34 P.M.
DAVIS…………………..23 NE AT 11:33 P.M. RMY N/A
FASTEST MILE FOR YESTERDAY…………………16 NE AT 11:37 P.M.*
MAXIMUM 2-MINUTE ASOS AVERAGE………………18 SW AT 6:02 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..17 SW AT 6:02 A.M.
AVERAGE WIND SPEED AND DIRECTION…………. .10.9 SW
ASOS……………………11.1
DAVIS……………………9.8 WSW [241 deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….TRACE DEPARTURE…..-0.12
ASOS……………0.00
TOTAL PRECIPITATION FOR THE MONTH………..0.61 DEPARTURE…..-0.27
ASOS……………0.61
TOTAL PRECIPITATION FOR THE YEAR………. 24.88 DEPARTURE…..-2.84
ASOS……………N/A ***
*** ASOS annual totals not available due to erroneous readings
PRELIMINARY CLIMATE SUMMARY FOR JUNE 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
6/1 48/46/47/-15/0.69/000/00 32 NE RMY 34
6/2 47/44/46/-16/0.80/000/00 28 NNE RMY 28
6/3 59/44/52/-10/0.00/172/19 16 ESE RMY 16
6/4 63/46/55/-8/0.00/445/49 17 E RMY 16
6/5 70/49/60/-3/T/500/55 17 NNE RMY 17
6/6 67/52/60/-4/0.06/382/42 26 ENE RMY 27
6/7 73/49/61/-3/0.00/884/97 28 S RMY 29
6/8 73/50/62/-2/T/310/34 41 SSW RMY 48
6/9 76/61/69/+4/0.03/228/25 29 SSW RMY 32
6/10 82/57/70/+5/0.00/840/92 24 WSW RMY N/A
6/11 85/61/73/+8/0.00/594/65 29 SSW RMY 32
6/12 86/65/76/+11/0.00/522/57 26 S RMY 29
6/13 83/67/75/+10/T/586/64 24 N RMY 27
6/14 75/61/68/+2/0.00/641/70 21 SSE RMY 21
6/15 61/52/57/-9/0.60/000/00 25 SE RMY 26
6/16 73/56/65/-1/T/009/01 18 NW RMY N/A
6/17 70/57/64/-3/0.00/605/66 28 NE RMY 28
6/18 76/54/65/-2/0.00/669/73 22 S RMY 26
6/19 84/60/72/+5/T/642/70 24 SSW RMY 22
6/20 75/56/66/-2/0.05/559/61 23 SSE RMY N/A
6/21 76/60/68/0/1.14/202/22 26 S RMY 29
6/22 83/63/73/+5/0.00/770/84 20 WNW RMY 19
6/23 85/67/76/+8/0.01/284/31 36 S RMY 38 TSTM
6/24 82/62/72/+3/0.00/899/98 25 WNW RMY 27
6/25 80/60/70/+1/0.00/605/66 21 W RMY N/A
6/26 72/58/65/-4/0.01/540/59 23 NNE RMY 21
6/27 73/56/65/-4/0.24/202/22 32 ESE RMY N/A
6/28 59/50/55/-15/1.27/000/00 39 ENE RMY 38
6/29 71/50/61/-9/0.00/110/12 17 SSW RMY 18
6/30 81/60/71/+1/T/741/81 21 S RMY N/A
7/1 80/63/72/+2/0.59/…/.. 30 SSE RMY 33 TSTM
7/2 78/60/69/-1/0.00/…/.. 23 WNW RMY N/A
7/3 79/58/69/-2/0.00/…/.. 17 SSW RMY 17
7/4 74/61/68/-3/T/…/.. 16 S RMY N/A
7/5 82/58/70/-1/0.00/…/.. 20 WSW RMY 20
7/6 85/64/75/+4/0.00/…/.. 20 S RMY 21
7/7 84/65/75/+4/0.02/…/.. 35 S RMY 40
7/8 87/68/78/+6/T/…/.. 23 NE RMY N/A
7/9 low since midnight is 62F; normal low is now 63F
DAILY RECORDS FOR JUNE AND JULY 2015
6/1- NEW RECORD LOW MAXIMUM TEMPERATURE OF 48F
surpasses previous record of 51F in 2004
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR JULY 9
HIGH 98F IN 1912
LOW 47F IN 1909
PRECIP 3.74 INS IN 1921
WIND 46 MPH NW IN 1992
RECORDS FOR JULY 10
HIGH 99F IN 1911
LOW 46F IN 1890
PRECIP 1.68 INS IN 1933
WIND 75 MPH W IN 1985
TODAY’S REPORT PREPARED BY: Brian Fitzgerald
