Monday, October 29, 2018
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, OCTOBER 29, 2018
ALL TIMES ARE IN EASTERN STANDARD TIME
RAIN THIS MORNING FOLLOWED BY SOME THUNDER OBSERVED
IN THE AFTERNOON….
Rainfall this morning left 0.31 inches in the gauge by the
1 P.M. observation. We also measured .08 inches from last
night’s showers. Visibility was reduced to a 1/2 mile this
morning due to fog, but improved to 30 miles by 10 A.M.
Winds have strengthened with a shift from E-W, with a peak
gust so far of 30 MPH (26 kts) occurring at 11:58 A.M.
Thunder was heard shortly after noontime, however no lightning
was seen by the observer. The high so far today is 55F,
which is a degree below the daily normal of 56F. The low since
midnight is 44F, 5 degrees above the normal minimum of 39F.
Today’s Observations:
7 A.M.
Weather: Moderate rain and fog
Temperature: 46F; Dew Point: 46F; Wind: SE at 11 kts
Sea-level pressure: 29.73 ins. Hg, falling steadily
Visibility: 1/2 mile, fog
6-hr Max temp: 46F
6-hr Min temp: 44F
24-hr Precip: 0.08 ins.
BHO SA 1155 W3 X 1/2RF 069/46/46/1211/973/ 8//// 70008 56014
10046 20044
10 A.M.
Weather: Scattered cumulus, scattered cirrus, few
stratus fractus in all directions, moderate rain
ending at 9:30 A.M.
Temperature: 53F; Dew Point: 53F; Wind: S at 9G13 kts
Sea-level pressure: 29.67 ins. Hg, falling rapidly
Visibility: 30 miles
3-hr Precip: 0.30 ins.
BHO SA 1455 20 SCT 300 SCT 30 047/53/53/1909G13/967/
FEW STFA ALQDS RE30/ 8/202 6030/ 57022
1 P.M.
Weather: Broken towering cumulus, broken cirrus,
light rain, thunder beginning at an unknown time
Temperature: 54F; Dew Point: 46F; Wind: W at 13G22 kts,
Sea-level pressure: 29.67 ins. Hg, steady
Visibility: 30 miles
6-hr Max temp: 55F
6-hr Min temp: 45F
6-hr Precip: 0.31 ins.
BHO SA 1755 E45 BKN 200 BKN 30 047/54/46/2713G22/967/
R-B05E25 TSBUKN/ 8/202 6031/ 55000 10055 20045
SUMMARY FOR SUNDAY, OCTOBER 28, 2018
TEMPERATURE (DEGREES F)
MAX…..51 NORMAL…..56
MIN…..40 NORMAL…..39
MEAN….46 NORMAL…..48
DEPARTURE FROM 30-YEAR NORMAL…………………..-2
TOTAL DEPARTURE FOR THE MONTH………………….-22 [-1.0 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..19 DEPARTURE………+1
TOTAL HEATING UNITS FOR THE MONTH………….394 DEPARTURE……..+27
TOTAL HEATING UNITS FOR THE SEASON…………481 DEPARTURE……..-28
TOTAL HEATING UNITS LAST SEASON TO DATE…….238 DIFFERENCE……+243
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………0 DEPARTURE………..0
TOTAL COOLING UNITS FOR THE MONTH…………..11 DEPARTURE……….+6
TOTAL COOLING UNITS FOR THE SEASON…………874 DEPARTURE……..+272
TOTAL COOLING UNITS LAST SEASON TO DATE…….731 DIFFERENCE…….+143
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..23 NNE AT 12:47 A.M.
AERO…………………….23 NNE AT 12:41 A.M.
ASOS…………………….25 N AT 12:02 A.M.
DAVIS……………………24 NNE AT 12:44 A.M. RMY 21
FASTEST MILE FOR YESTERDAY………………….18 NNE AT 12:40 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….18 N AT 12:49 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………19 N AT 12:49 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..8.0 WSW
ASOS…………………..8.4
DAVIS………………….8.5 W [276 deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.08 DEPARTURE……-0.08
ASOS…………..0.08
TOTAL PRECIPITATION FOR THE MONTH……….5.56 DEPARTURE……+1.34
ASOS…………..5.61
TOTAL PRECIPITATION FOR THE YEAR……….52.76 DEPARTURE……+9.64
ASOS………….54.53
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/+2/0.22/042/06 21 ENE AERO 18 SSW RMY N/A
10/02 64/53/59/+2/0.77/000/00 33 S AERO 32 S RMY 35 TSTM
10/03 60/52/56/0/0.33/000/00 18 NNE AERO 14 NNE RMY 14
10/04 69/57/63/+7/0.00/204/30 29 SSW AERO 29 SSW RMY 32
10/05 64/47/56/0/0.00/618/92 25 NE AERO 21 NE RMY 24
10/06 64/45/55/0/0.00/264/40 23 SSW AERO 23 SSW RMY 25
10/07 75/56/66/+11/0.05/072/11 28 NE AERO 24 ENE RMY 27
10/08 56/53/55/+1/0.03/000/00 22 ENE AERO 20 ENE RMY N/A
10/09 75/56/66/+12/0.00/204/31 26 WSW AERO 28 SW RMY 29
10/10 82/65/74/+20/0.00/480/73 24 WSW AERO 23 WSW RMY 25
10/11 70/56/63/+10/0.78/000/00 48 NNE AERO 47 NNE RMY 50
10/12 59/44/52/-1/0.31/174/27 32 NW AERO 32 NW RMY 33
10/13 49/40/45/-8/0.17/108/17 21 WNW AERO 20 WNW RMY 20
10/14 55/37/46/-6/0.00/120/19 21 W AERO 18 W RMY 21
10/15 66/44/55/+3/0.06/030/05 46 W AERO 46 W RMY N/A
10/16 56/41/49/-2/0.03/606/94 48 W AERO 48 W RMY N/A
10/17 60/39/50/-1/0.01/564/89 48 W AERO 50 W RMY 53
10/18 45/33/39/-12/…./…/.. 32 WNW AERO 35 WNW RMY 36
10/19 60/31/46/-4/…./…/.. 33 SSW AERO 36 SSW RMY 36
10/20 62/46/54/+4/…./…/.. 35 SSW AERO 37 SSW RMY 33
10/21 46/31/39/-11/…./…/.. 39 NNW AERO 41 NW RMY 41
10/22 50/27/39/-10/…./…/.. 24 W AERO 22 W RMY 21
10/23 53/40/47/-2/…./…/.. 29 WNW AERO 29 WNW RMY 29 TSTM
10/24 45/35/40/-9/…./…/.. 31 NW AERO 31 NW RMY 32
10/25 48/32/40/-9/…./…/.. 35 NW AERO 35 NW RMY 36
10/26 45/27/36/-12/…./…/.. 20 NW AERO 19 NW RMY N/A
10/27 48/38/43/-5/…./…/.. 54 NE AERO 55 NE RMY 55
10/28 51/40/46/-2/…./…/.. 23 NNE AERO 23 NNE RMY N/A
10/29 Low temp since midnight is 44F; normal low is 39F
DAILY RECORDS FOR OCTOBER
10/10/18: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 65F,
BREAKS PREVIOUS RECORD OF 62F SET IN 1949
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR OCTOBER 29
HIGH 74F IN 1989
LOW 23F IN 1891
PRECIP 2.42 INCHES IN 2012
SNOWFALL 4.0 INCHES IN 2011
PEAK GUST 76 E IN 2012
RECORDS FOR OCTOBER 30
HIGH 75F IN 1946,1989
LOW 21F IN 1928
PRECIP 1.85 INCHES IN 1917
SNOWFALL 2.0 INCHES IN 2011
PEAK GUST 66 NW IN 1963
TODAY’S REPORT PREPARED BY: Benjamin Turner
