Friday, July 8, 2016
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, JULY 8, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME
COOL AND RAW WEATHER THIS MORNING
CLOUDS SLOWLY LIFT WITH FEW PEAKS OF SUN BY AFTERNOON
Summer has taken a backseat at the summit today. Winds have retained an
easterly component since the backdoor cold frontal passage early yesterday
morning. This has helped keep the temperatures below average, and also
contributed to low clouds, fog, and drizzle observed this morning, with 0.02
inches of rain recorded. The temperature fell as low as 59F around 8:30 this
morning, and has only recovered to a high so far of 65F. Drizzle ended by
mid-morning, and the cloud ceiling gradually lifted with a few peaks of
sunshine by afternoon, though mostly cloudy conditions continue to prevail.
Visibility recovered from near zero this morning to 45 miles this afternoon.
Today’s Observations:
7 A.M.
Weather: Sky obscured by dense fog, light drizzle
Temperature: 60F; Dew Point: 60F; Wind: NE at 12G20 kts
Sea-level pressure: 29.87 in. Hg, rising then rising more rapidly
Visibility: 1/16 mile
6-hr Max temp: 61F
6-hr Min temp: 60F
24-hr precip: 0.02 in.
BHO SA 1155 W2 X 1/16L-F 114/60/60/0412G20/987/ STFRA DRFTG BLO SMT
PCPN VRY LGT/ 8//// 53016 ASOS 60002 MANUAL 70002 ASOS 70002 10061 20060
10 A.M.
Weather: Overcast stratocumulus, light drizzle ended 9:28 A.M.
Temperature: 61F; Dew Point: 59F; Wind: NE at 8G20 kts,
Wind: Direction variable N-E
Sea-level pressure: 29.90 in. Hg, rising then rising more slowly
Visibility: 30 miles
3-hr precip: Trace
BHO SA 1455 E5 OVC 30 124/61/59/0408G20/990/ OCNL L-E28 WND 36V90/
8/5// 51010 MANUAL 6000/
1 P.M.
Weather: Broken stratocumulus, overcast stratocumulus (higher layer),
break in overcast SE and distant NE
Temperature: 65F; Dew Point: 57F; Wind: NE at 9 kts,
Wind: Direction variable NNE-ESE
Sea-level pressure: 29.91 in. Hg, rising slightly
Visibility: 45 miles
6-hr Max temp: 65F
6-hr Min temp: 59F
6-hr precip: Trace
BHO SA 1755 E12 BKN 35 OVC 45 128/65/57/0509/991/ BINOVC SE AND DSNT NE
WND 02V10/ 8/5// 53004 MANUAL 6000/ 10065 20059
SUMMARY FOR THURSDAY, JULY 7, 2016
TEMPERATURE (DEGREES F)
MAX…..77 NORMAL…..80
MIN…..61 NORMAL…..62
MEAN….69 NORMAL…..71
DEPARTURE FROM 30-YEAR NORMAL…………………….-2
TOTAL DEPARTURE FOR THE MONTH……………………+16 [+2.1 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………4 DEPARTURE……….-3
TOTAL COOLING UNITS FOR THE MONTH…………..56 DEPARTURE………+12
TOTAL COOLING UNITS FOR THE SEASON…………213 DEPARTURE………+40
TOTAL COOLING UNITS LAST SEASON TO DATE…….181 DIFFERENCE……..+32
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….21 NE AT 11:55 P.M.
ASOS……………………21 NE AT 11:55 P.M.
DAVIS…………………..19 NNE AT 11:55 P.M. RMY N/A
FASTEST MILE FOR YESTERDAY…………………14 ENE AT 6:00 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………16 ENE AT 5:44 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..14 NNE AT 11:56 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..7.8 ENE
ASOS…………………..8.3
DAVIS………………….7.1 E [075 Deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.02 DEPARTURE……-0.09
ASOS…………..0.02
TOTAL PRECIPITATION FOR THE MONTH……….0.51 DEPARTURE……-0.25
ASOS…………..0.48
TOTAL PRECIPITATION FOR THE YEAR……….22.20 DEPARTURE……-5.53
ASOS………….22.60
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/…/.. 32 S AERO 35 S RMY 34 TSTM
7/2 76/61/69/-1/0.00/…/.. 31 W AERO 34 W RMY 32
7/3 83/57/70/-1/0.00/…/.. 23 W AERO 23 W RMY 23
7/4 87/61/74/+3/0.00/…/.. 28 SSW AERO 28 SSW RMY 28
7/5 80/65/73/+2/0.29/…/.. 16 S AERO 16 S RMY N/A
7/6 92/68/80/+9/0.00/…/.. 22 WSW AERO 24 WSW RMY 22
7/7 77/61/69/-2/…./…/.. 21 NE AERO 20 ENE RMY N/A
7/8 low temp since midnight is 59F; normal low now 63F
DAILY RECORDS FOR JULY 2016
None so far.
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR JULY 8
HIGH 95F IN 1981
LOW 50F IN 1919
PRECIP 1.74 INS IN 1916
PEAK GUST 46e SSW IN 1941
RECORDS FOR JULY 9
HIGH 98F IN 1912
LOW 47F IN 1909
PRECIP 3.74 INS IN 1921
WIND 46 MPH NW IN 1992
TODAY’S REPORT PREPARED BY: Jonathan O’Brien
