Saturday, November 3, 2018

BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, NOVEMBER 3, 2018
ALL TIMES ARE IN EASTERN STANDARD TIME

VARYING WEATHER AND STRONG WINDS WITH CLOUD COVER
DECREASING IN THE AFTERNOON….

Wind increased drastically after noontime, reaching
a max gust so far of 59 mph (51 kts) from the west.
A wind shift from east to south was observed at
11 A.M. Rainfall this morning and the shower
following the wind shift totaled .29 inches at
the 1 P.M. observation. Last night’s rain was
measured to be 1.43 inches at 7 A.M.

Fog increased following the 7 A.M. observation,
bringing visibility down to a 1/2 mile by 10 A.M.
By 1 P.M., visibility had increased considerably,
rising to 70 miles. Another rain squall moved
through between 1 P.M. and 2 P.M., leaving a
rainbow in its wake. The high temperature
so far today is 60F, 6 degrees above the
normal of 54F. The low since midnight is 49F,
12 degrees above the normal minimum of 37F.
PRELIMINARY STATS FOR OCTOBER 2018

TEMPERATURE, Deg. F
Avg. Max. 58.0 [-2.3] Avg. Min. 42.7 [-0.2] Mean 50.4 [-1.2] 24-hour corrected mean: 50.2
Max. for month: 82F on the 10th
Min. for month: 27F on the 22nd

HEATING DEGREE DAYS
Total heating units: 457 [+36] Total for the season: 544 [-19] Total for last season: 268

COOLING DEGREE DAYS
Total cooling units: 11 [+6] Total for the season: 874 [+272] Total for last season: 731

PRECIPITATION, Inches
Total: 5.85 in. [+1.16] Greatest in 24 hrs: 2.08 inches on October 27

WIND, mph
Avg. uncorrected wind speed: N/A
Avg. corrected wind speed: N/A
Prevailing wind direction: N/A
Peak gust and direction: N/A

Today’s Observations:

7 A.M.
Weather: Overcast nimbostratus, few stratus fractus in
all directions, rain becoming light rain at an unknown
time
Temperature: 52F; Dew Point: 52F; Wind: SSW at 13G20 kts
Sea-level pressure: 29.64 ins. Hg, rising then falling
Visibility: 5 miles, except 20 miles E-SW
6-hr Max temp: 64F
6-hr Min temp: 52F
24-hr Precip: 1.43 ins.
BHO SA 1155 E60 OVC 5R-F 036/52/52/0813G20/964/ FEW STFRA ALQDS
VSBY E-SW 20 R BCMG R-UNK/ 8/72/ 70143 58005 10064 20052

10 A.M.
Weather: Rain becoming light rain, then ending at 9:55 A.M.
Temperature: 50F; Dew Point: 50F; Wind: ENE at 12G13 kts
Sea-level pressure: 29.57 ins. Hg, falling rapidly
Visibility: 1/2 mile, fog
3-hr Precip: 0.23 ins.
BHO SA 1455 W3 X 1/2F 015/50/50/0712G13/957/ R BCMG R-UNK R-E55/
8//// 6023/ 58021

1 P.M.
Weather: Broken cumulus, broken cirrus, virga NE-SE,
rain shower from 12:40 P.M. to 12:50 P.M.
Temperature: 57F; Dew Point: 56F; Wind: W at 24G36 kts,
Peak Wind: 41 MPH (36 kts) W at 12:15 P.M.
Sea-level pressure: 29.51 ins. Hg, falling steadily
Visibility: 70 miles, except 10 miles NE-SE
6-hr Max temp: 60F
6-hr Min temp: 49F
6-hr Precip: 0.29 ins.
BHO SA 1755 E30 BKN 250 BKN 70 992/57/56/2624G36/951/
FEW STFRA ALQDS VIRGA NE-SE VSBY NE-SE 10 RWB40E50 PK
WND 2636/15/ 8/808 6029/ 55023 10060 20049

SUMMARY FOR FRIDAY, NOVEMBER 2, 2018

TEMPERATURE (DEGREES F)
MAX…..65   NORMAL…..55
MIN…..52   NORMAL…..38
MEAN….59   NORMAL…..46

DEPARTURE FROM 30-YEAR NORMAL………………….+13
TOTAL DEPARTURE FOR THE MONTH………………….+24 [+11.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..13   DEPARTURE………-6
TOTAL HEATING UNITS FOR THE MONTH…………..21   DEPARTURE……..-17
TOTAL HEATING UNITS FOR THE SEASON…………565   DEPARTURE……..-36
TOTAL HEATING UNITS LAST SEASON TO DATE…….292   DIFFERENCE……+273

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………………..37 SSW AT   9:39 A.M.
AERO…………………….41 SSW AT   9:39 A.M.
ASOS…………………….42 SSW AT   9:40 A.M.
DAVIS……………………42 S   AT   8:56 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………….32 S   AT  11:53 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….32 SW  AT  11:54 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………30 SSW AT   7:18 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..19.2 SSW
ASOS…………………..19.2
DAVIS………………….17.8 SSW [182 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….1.43  DEPARTURE…….-1.28
ASOS…………..1.47
TOTAL PRECIPITATION FOR THE MONTH……….1.51  DEPARTURE…….+1.20
ASOS…………..1.57
TOTAL PRECIPITATION FOR THE YEAR……….54.58  DEPARTURE……+10.68
ASOS………….56.43

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 TSTM
10/29 55/40/48/+1/…./…/..         30 WSW AERO 30 WSW RMY 34
10/30 45/34/40/-7/…./…/..         28 NW  AERO 28 NW  RMY 30
10/31 55/32/44/-3/…./…/..         35 SSW AERO 36 SSW RMY 37

DAILY RECORDS FOR OCTOBER

10/10/18: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 65F,
BREAKS PREVIOUS RECORD OF 62F SET IN 1949

PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 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

11/01 65/49/57/+11/…./…/..         25 SSW AERO 24 SSW RMY N/A
11/02 65/52/59/+13/…./…/..         37 SSW AERO 41 SSW RMY N/A

11/03 Low temp since midnight is 50F; normal low is 37F

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):

RECORDS FOR NOVEMBER 3
HIGH 75 IN 1990
LOW 21 IN 1891
PRECIP 1.92 INCHES IN 1951
SNOWFALL 0.1 IN 1951
PEAK GUST 96e SSE IN 1951

RECORDS FOR NOVEMBER 4
HIGH 77 IN 1987
LOW 22 IN 1891
PRECIP 3.27 INCHES IN 1910
SNOWFALL 6.4 IN 1945
PEAK GUST 73 WNW IN 1965

TODAY’S REPORT PREPARED BY: Benjamin Turner