Monday, August 18, 2014
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, AUGUST 18, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME
A COOL START TO THE WEEK, AS THE MERCURY
FALLS TO 56F OVERNIGHT
After a very cool overnight, temperatures has struggled to reach
70F by just before noon. Our overnight low of 56F fell 6 degrees
below our daily average low of 62F.
Visibility has been exceptional so far this morning, with a
station maximum visibility of 90 miles in all directions reported
at the 10 AM EST observation. A thickening layer of cumulus overhead,
coupled with breezy NW winds have kept temperatures below-average.
By the 1:00 PM EST observation a maximum of 77F had been recorded,
with scattered cumulus slowly covering less of the sky.
Today’s Observations:
7 A.M.
Weather: Clear, few altocumulus distant NNE-SSE,
few cirrus fibratus distant W
Temperature: 62F; Dew Point: 54F; Wind: WNW at 8 kts
Sea-level pressure: 29.84 ins. Hg, rising, then more slowly
Visibility: 80 miles
6-hr max temp: 62F
6-hr min temp: 56F
24-hr precip: Trace
BHO SA 1155 CLR 80 106/62/54/3008/984/ FEW AC DSNT NNE-SSE FEW
CI DSNT W/ 8/031 51010 MANUAL 7000/ 10062 20056
10 A.M.
Weather: Broken cumulus, broken altocumulus
Temperature: 69F; Dew Point: 54F; Wind: NW at 10 kts
Sea-level pressure: 29.84 ins. Hg, falling then falling more slowly
Visibility: 90 miles
BHO SA 1455 E37 BKN 80 BKN 90 104/69/54/3210/984/ 8/130 56002
1 P.M.
Weather: Scattered cumulus
Temperature: 77F; Dew Point: 55F; Wind: NW at 10G15 kts
Sea-level pressure: 29.81 ins. Hg, falling then falling more slowly
Visibility: 80 miles
6-hr max. temp: 77F
6-hr min. temp: 62F
BHO SA 1755 49 SCT 80 096/77/55/E3109G15/981/ WND 26V35/ 8/100 56008
10077 20062
WEATHER SUMMARY FOR SUNDAY, AUGUST 17, 2014
TEMPERATURE (DEGREES F)
MAX…..78 NORMAL…..79
MIN…..60 NORMAL…..62
MEAN….69 NORMAL…..71
DEPARTURE FROM 30-YEAR NORMAL…………………….-2
TOTAL DEPARTURE FOR THE MONTH……………………-28 [-1.8 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..4 DEPARTURE………..-2
TOTAL COOLING UNITS FOR THE MONTH………….84 DEPARTURE……….-31
TOTAL COOLING UNITS FOR THE SEASON………..421 DEPARTURE……….-45
TOTAL COOLING UNITS LAST SEASON TO DATE……551 DIFFERENCE……..-130
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………21 WNW AT 3:00 P.M.*
ASOS…………………..23 WNW AT 3:01 P.M.
DAVIS………………….22 W AT 1:52 P.M. RMY 23
FASTEST MILE FOR YESTERDAY………………..16 NW AT 3:09 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..16 W AT 3:10 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….15 W AT 3:09 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..9.8 NW
ASOS…………………..10.2
DAVIS………………….8.7 W [258 deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…TRACE DEPARTURE……….-0.13
ASOS…………..0.00
TOTAL PRECIPITATION FOR AUGUST………….1.38 DEPARTURE……….-0.98
ASOS…………..1.35
TOTAL PRECIPITATION FOR THE YEAR……….31.01 DEPARTURE……….-2.34
ASOS………….31.26
PRELIMINARY CLIMATE SUMMARY FOR 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
8/1 86/63/75/+3/0.00/598/69 25 S RMY 29
8/2 68/59/64/-8/0.11/009/01 21 ESE RMY 22
8/3 71/60/66/-6/0.01/104/12 12 SE RMY 12
8/4 83/64/74/+2/0.00/550/64 20 S RMY 21
8/5 87/66/77/+5/0.00/798/93 17 S RMY 19
8/6 79/64/72/0/0.07/462/54 23 WNW RMY 25
8/7 79/58/69/-3/T/589/69 22 NW RMY 24 TSTM
8/8 82/55/69/-3/0.00/817/96 20 WNW RMY 20
8/9 82/60/71/-1/0.00/730/86 16 WNW RMY 17
8/10 84/63/74/+3/0.00/770/91 15 W RMY N/A
8/11 85/63/74/+3/0.00/667/79 25 S RMY 29
8/12 81/64/73/+2/0.00/387/46 25 SSE RMY N/A
8/13 69/61/65/-6/1.09/000/00 35 ESE RMY 37
8/14 73/57/65/-6/0.00/828/99 27 W RMY 29
8/15 74/56/65/-6/0.09/…/.. 23 W RMY 23 TSTM
8/16 76/56/66/-5/…./…/.. 24 SW RMY 27
8/17 78/60/69/-2/…./…/.. 21 WNW RMY 23
8/18 morning low of 56F; the normal low is now 62F
DAILY RECORDS FOR AUGUST 2014:
None so far.
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR AUGUST 18
HIGH 93F IN 2002
LOW 47F IN 1824
PRECIP 5.75 INCHES IN 1955 [DIANE]
PEAK GUST 46 MPH WNW IN 2007
RECORDS FOR AUGUST 19
HIGH 90F IN 1906, 1966, 2002
LOW 48F IN 1958
PRECIP 7.02 INCHES IN 1955 [DIANE – RECORD FOR MONTH]
PEAK GUST 78 MPH ENE IN 1991 [ HURRICANE BOB ]
TODAY’S REPORT PREPARED BY: Brian Fitzgerald
