Sunday, October 14, 2018
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, OCTOBER 14, 2018
ALL TIMES ARE IN EASTERN STANDARD TIME
COOL, DRY DAY ON TOP OF GREAT BLUE HILL….
Today was cooler than normal, with a high so far of 53F,
which is 8 degrees cooler than our normal high of 61F.
Early this morning we reached the 30’s for the first time
this season, with our low so far today being 37F, which is
6 degrees cooler than our normal low of 43F. Humidities
stayed relatively low after our 7 o’clock observation. We
experienced looming due to a temperature inversion this
morning allowing for visibility of mountains that we
normally would not be able to see.
Today’s Observations:
7 A.M.
Weather: Broken cirrostratus, few cumulus NE-SE, looming
along horizon below inversion in all directions
Temperature: 40F; Dew Point: 38F; Wind: W at 8G12 kts,
Sea-level pressure: 30.17 ins. Hg, rising then more quickly
Visibility: 80 miles
6-hr Max temp: 40F
6-hr Min temp: 37F
24-hr Precip: 0.17 ins.
BHO SA 1155 250 BKN 80 218/40/38/2708G12/017/ FEW CU NE-SE
LOOMING ALG HRZN BLO INVSN ALQDS/ 8/108 70017 52016 10040
20037
10 A.M.
Weather: Broken cirrocumulus, few cumulus in all
directions
Temperature: 49F; Dew Point: 39F; Wind: W at 7 kts
Sea-level pressure: 30.20 ins. Hg, rising then steady
Visibility: 80 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 250 BKN 80 226/49/39/2607/020/ FEW CU ALQDS/
8/109 50008
1 P.M.
Weather: Broken cirrostratus, scattered altocumulus, few
cumulus in all directions
Temperature: 52F; Dew Point: 38F; Wind: SW at 10G14 kts
Sea-level pressure: 30.19 ins. Hg, increasing then decreasing
Visibility: 80 miles
6-hr Max temp: 53F
6-hr Min temp: 40F
6-hr Precip: 0.00 ins.
BHO SA 1755 250 BKN 160 SCT 80 223/52/38/2310G14/019/ FEW
CU ALQDS/ 8/178 58003 10053 20040
SUMMARY FOR SATURDAY, OCTOBER 13, 2018
TEMPERATURE (DEGREES F)
MAX…..49 NORMAL…..61
MIN…..40 NORMAL…..44
MEAN….45 NORMAL…..53
DEPARTURE FROM 30-YEAR NORMAL…………………..-8
TOTAL DEPARTURE FOR THE MONTH…………………..56 [+4.1 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..20 DEPARTURE………+7
TOTAL HEATING UNITS FOR THE MONTH…………..87 DEPARTURE……..-51
TOTAL HEATING UNITS FOR THE SEASON…………174 DEPARTURE…….-106
TOTAL HEATING UNITS LAST SEASON TO DATE…….145 DIFFERENCE…….+29
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………0 DEPARTURE………..0
TOTAL COOLING UNITS FOR THE MONTH…………..11 DEPARTURE……….+7
TOTAL COOLING UNITS FOR THE SEASON…………874 DEPARTURE……..+273
TOTAL COOLING UNITS LAST SEASON TO DATE…….727 DIFFERENCE…….+147
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..21 WNW AT 10:10 A.M.
AERO…………………….20 WNW AT 10:16 A.M.
ASOS…………………….21 WNW AT 10:11 A.M.
DAVIS……………………21 W AT 10:10 A.M. RMY 20
FASTEST MILE FOR YESTERDAY………………….17 WNW AT 7:10 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….16 W AT 7:16 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………17 W AT 7:13 P.M.
AVERAGE WIND SPEED AND DIRECTION……………8.8 WNW
ASOS……………………9.2
DAVIS…………………..9.4 WNW [292 deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.17 DEPARTURE……+0.02
ASOS…………..0.17
TOTAL PRECIPITATION FOR THE MONTH……….2.66 DEPARTURE……+0.73
ASOS…………..2.66
TOTAL PRECIPITATION FOR THE YEAR……….49.86 DEPARTURE……+9.03
ASOS………….51.58
PRELIMINARY CLIMATE SUMMARY FOR OCTOBER 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
M: Missing data
10/01 65/53/59/+2/…./…/.. 21 ENE AERO 18 SSW RMY N/A
10/02 64/53/59/+2/…./…/.. 33 S AERO 32 S RMY 35 TSTM
10/03 60/52/56/0/…./…/.. 18 NNE AERO 14 NNE RMY 14
10/04 69/57/63/+7/…./…/.. 29 SSW AERO 29 SSW RMY 32
10/05 64/47/56/0/…./…/.. 25 NE AERO 21 NE RMY 24
10/06 64/45/55/0/0.00/…/.. 23 SSW AERO 23 SSW RMY 25
10/07 75/56/66/+11/…./…/.. 28 NE AERO 24 ENE RMY 27
10/08 56/53/55/+1/…./…/.. 22 ENE AERO 20 ENE RMY N/A
10/09 75/56/66/+12/…./…/.. 26 WSW AERO 28 SW RMY 29
10/10 82/65/74/+20/…./…/.. 24 WSW AERO 23 WSW RMY 25
10/11 70/56/63/+10/…./…/.. 48 NNE AERO 47 NNE RMY 50
10/12 59/44/52/-1/…./…/.. 32 NW AERO 32 NW RMY 33
10/13 49/40/45/-8/…./…/.. 21 WNW AERO 20 WNW RMY 20
10/14 Low temp since midnight is 37F; normal low is 43F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR OCTOBER 14
HIGH 79F IN 2000
LOW 28F IN 1958
PRECIP 2.69 INCHES IN 1990
SNOWFALL 2.0 INCHES IN 1913
PEAK GUST 63e W IN 1976
RECORDS FOR OCTOBER 15
HIGH 83F IN 1897
LOW 29F IN 1887,1937
PRECIP 4.58 INCHES IN 2005
SNOWFALL TRACE IN 1961,1972
PEAK GUST 69 MPH W IN 2003
TODAY’S REPORT PREPARED BY: Samantha Richard
