Friday, July 10, 2015
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, JULY 10, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME
DAILY PRECIP RECORD UNOFFICIALLY BROKEN AS OVERNIGHT
DELUGE BRINGS 2.03 INCHES OF NEW RAIN, THUNDER, LIGHTNING
Rain, beginning before midnight EST last night, brought heavy
rain for nearly three continuous hours, totaling 2.03 inches
by this morning’s 7:00 AM EST observation. Nearly all of the
rain fell after midnight EST this morning, unofficially breaking
today’s daily precipitation record of 1.68 inches, set in 1933.
During the 12:45 AM to 1:00 AM EST period, rainfall rates nearly
exceeded 2 inches per hour.
Fog cleared gradually this morning, with some sunshine by the
10:00 AM EST observation. By 1:00 PM EST sunshine was abundant
with scattered stratocumulus, cumulus and cirrus fibratus. Visibility
had increased slightly to 20 miles in all directions thanks to
haze. A maximum temperature of 77F has been recorded so far.
Today’s Observations:
7 A.M.
Weather: Thick fog
Temperature: 60F; Dew Point: 60F; Wind: estimated N at 4 kts
Wind Speed: Light
Sea-level pressure: 29.91 ins. Hg, rising, then more quickly
Visibility: 1/8 of a mile, thick fog
6-hr Max temp: 62F
6-hr Min temp: 59F
24-hr precip: 2.03 inches
BHO SA 1155 W2 X 1/8F 130/60/60/E3604/991/ WND LGT AND VRB/
8//// 53018 ASOS 60166 70208 MANUAL 70203 10062 20059
10 A.M.
Weather: Broken stratocumulus
Temperature: 70F; Dew Point: 65F; Wind: NNW at 7 kts
Sea-level pressure: 29.94 ins. Hg, falling, then rising but lower
Visibility: 10 miles, thin fog in all directions
BHO SA 1455 E9 BKN 10 138/70/65/3407/994/ THN FG ALQDS/ 8/500 53008
1 P.M.
Weather: Scattered stratocumulus, scattered cumulus,
scattered cirrus
Temperature: 76F; Dew Point: 64F; Wind: estimated ENE at 4 kts,
Wind Speed: Light
Sea-level pressure: 29.93 ins. Hg, falling, then more quickly
Visibility: 20 miles, hazy
6-hr Max temp: 77F
6-hr Min temp: 60F
BHO SA 155 24 SCT 36 SCT 300 SCT 20 135/76/64/E0703/993/
HAZY WND LGT/ 8/801 58003 10077 20060
SUMMARY FOR THURSDAY, JULY 9, 2015
TEMPERATURE (DEGREES F)
MAX…..73 NORMAL…..81
MIN…..61 NORMAL…..63
MEAN….67 NORMAL…..72
DEPARTURE FROM 30-YEAR NORMAL……………………-5
TOTAL DEPARTURE FOR THE MONTH……………………+4 [+0.2 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………2 DEPARTURE……….-5
TOTAL COOLING UNITS FOR THE MONTH…………..58 DEPARTURE……….+1
TOTAL COOLING UNITS FOR THE SEASON…………196 DEPARTURE………+10
TOTAL COOLING UNITS LAST SEASON TO DATE…….197 DIFFERENCE………-1
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….24 NE AT 12:13 A.M.
ASOS……………………26 ENE AT 12:12 A.M.
DAVIS…………………..23 NE AT MISSING RMY 25
FASTEST MILE FOR YESTERDAY…………………16 ENE AT 1:42 A.M.*
MAXIMUM 2-MINUTE ASOS AVERAGE………………17 ENE AT 12:33 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..15 NE AT 12:33 A.M.
AVERAGE WIND SPEED AND DIRECTION…………….9.3 ENE
ASOS…………………….9.1
DAVIS……………………8.1 ENE [069 deg.]
* Last of several occurrences
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…..2.03 DEPARTURE…..+1.65
ASOS……………2.08
TOTAL PRECIPITATION FOR THE MONTH………..2.64 DEPARTURE…..+1.92
ASOS……………2.69
TOTAL PRECIPITATION FOR THE YEAR………. 26.91 DEPARTURE…..-0.92
ASOS……………N/A ***
*** ASOS annual totals not available due to erroneous readings
PRELIMINARY CLIMATE SUMMARY FOR JULY 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/…/.. 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 73/61/67/-5/…./…/.. 24 NE RMY 25
7/10 low since midnight is 59F; normal low is now 63F
DAILY RECORDS FOR JULY 2015
7/10- NEW RECORD DAILY PRECIPITATION PENDING OF X.XX in
surpasses previous record of 1.68 in. in 1933
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR JULY 10
HIGH 99F IN 1911
LOW 46F IN 1890
PRECIP 1.68 INS IN 1933
WIND 75 MPH W IN 1985
RECORDS FOR JULY 11
HIGH 98F IN 1911
LOW 49F IN 1890
PRECIP 1.87 INS IN 1959
WIND 53 MPH NW IN 1988
TODAY’S REPORT PREPARED BY: Brian Fitzgerald
