Sunday, October 23, 2016

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, OCTOBER 23, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME

CLEAR SKIES AND GUSTY WINDS AS PRESSURE INCREASES

Skies were clear today with only few cumulus and few cirrus. Humidity was low
with dew points in the upper 20s which allowed for visibility up to 80 miles.
Air pressure has been steadily increasing as the strong low pressure system
moved off shore. This has also brought blustery conditions to Blue Hill. The
peak gust since midnight was 47 mph at 3:11AM EST. Temperatures reached a high
of 55F by the 1:00PM observation.

7 A.M.
Weather: Few cumulus in all directions, broken altocumulus
Temperature: 43F; Dew Point: 30F; Wind: WSW at 24G35 kts
Peak Wind: 35 kts (40 mph) WSW at 6:38 AM EST
Sea-level pressure: 29.57 ins. Hg, rising, then less quickly
Visibility: 70 miles
6-hr Max temp: 44F
6-hr Min temp: 42F
24-hr precip: 0.22 in.
BHO SA 1155 E110 BKN 70 015/43/30/2524G35/957/ FEW CU ALQDS PK WND 2535/48/
8/170 51024 MANUAL 70022 ASOS 70021 10044 20042

10 A.M.
Weather: Few cumulus in all directions, few cirrus in all directions
Temperature: 48F; Dew Point: 28F; Wind: W at 26G38 kts
Peak Wind: 38 kts (44 mph) W at 9:53 AM EST
Sea-level pressure: 29.59 ins. Hg, rising, then falling
Visibility: 70 miles
BHO SA 1455 CLR 70 020/48/28/2626G38/959/ FEW CU ALQDS FEW CI ALQDS PK WND
2638/53/ 8/101 50005

1 P.M.
Weather: Few cumulus SE-SW and W-E, few cirrus NW-NE
Temperature: 55F; Dew Point: 24F; Wind: SW at 23G33 kts
Peak Wind: 38 kts (44 mph) W at 11:58 AM EST
Sea-level pressure: 29.61 ins. Hg, falling, then rising
Visibility: 80 miles
6-hr Max. temp: 55F
6-hr Min. temp: 42F
BHO SA 1755 CLR 80 026/55/24/2823G33/961/ FEW CU SE-SW AND W-E FEW CI NW-NE
PK WND 2738/58/ 8/102 53006 10055 20042

SUMMARY FOR SATURDAY, OCTOBER 22, 2016

TEMPERATURE (DEGREES F)
MAX…..65   NORMAL…..58
MIN…..40   NORMAL…..41
MEAN….53   NORMAL…..49

DEPARTURE FROM 30-YEAR NORMAL……………………+4
TOTAL DEPARTURE FOR THE MONTH………………….+102 [+4.4 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………0   DEPARTURE………..0
TOTAL COOLING UNITS FOR THE MONTH……………7   DEPARTURE……….+2
TOTAL COOLING UNITS FOR THE SEASON…………901   DEPARTURE……..+299
TOTAL COOLING UNITS LAST SEASON TO DATE…….810   DIFFERENCE……..+91

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..12   DEPARTURE……….-4
TOTAL HEATING UNITS FOR THE MONTH………….166   DEPARTURE……..-101
TOTAL HEATING UNITS FOR THE SEASON…………241   DEPARTURE……..-168
TOTAL HEATING UNITS LAST SEASON TO DATE…….306   DIFFERENCE……..-65

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….37 WSW AT 11:38 P.M.
ASOS……………………39 W   AT 11:39 P.M.
DAVIS…………………..38 WSW AT 11:38 P.M. RMY 50
FASTEST MILE FOR YESTERDAY…………………27 W   AT  7:21 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………26 W   AT  7:25 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..25 WSW AT  4:54 P.M.
AVERAGE WIND SPEED AND DIRECTION………….13.0 WSW
ASOS………………….13.9
DAVIS…………………11.3 W [265 Deg.] *last of several occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.22  DEPARTURE……+0.06
ASOS…………..0.21
TOTAL PRECIPITATION FOR THE MONTH……….5.72  DEPARTURE……+2.43
ASOS…………..5.75
TOTAL PRECIPITATION FOR THE YEAR……….33.04  DEPARTURE……-9.33
ASOS………….33.39

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

10/1  57/52/55/-2/1.22/000/00                 33 NNE AERO  M  RMY 34
10/2  55/52/54/-3/0.19/000/00                 23 N   AERO  M  RMY N/A
10/3  69/53/61/+5/0.00/404/58                 21 ENE AERO  M  RMY 20
10/4  61/47/54/-2/T/493/71                    26 NE  AERO  M  RMY 27
10/5  61/44/53/-3/0.00/630/91                 22 NE  AERO  M  RMY 21
10/6  71/46/59/+4/0.00/682/99                 16 SW* AERO  M  RMY 15
10/7  75/54/65/+10/0.00/679/99                16 S   AERO  M  RMY 16
10/8  69/53/61/+7/0.00/130/19                 23 SSW AERO  M  RMY 23
10/9  63/44/54/0/1.89/000/00                  28 N   AERO  M  RMY 34
10/10 57/40/49/-5/0.00/658/97                 32 NW  AERO  M  RMY 32
10/11 62/39/51/-2/0.00/655/97                 17 N   AERO  M  RMY N/A
10/12 68/49/59/+6/0.00/645/96                 17 S   AERO  M  RMY 17
10/13 71/52/62/+9/T/348/52                    24 SSW AERO  M  RMY 28
10/14 58/41/50/-2/0.00/667/100                26 NNW AERO  M  RMY 25
10/15 58/38/48/-4/0.00/578/87                 23 S   AERO  M  RMY 26
10/16 68/46/57/+6/0.00/562/85                 28 SSW AERO  M  RMY 30
10/17 76/58/67/+16/0.00/494/75                23 WSW AERO  M  RMY N/A
10/18 74/56/65/+14/0.54/210/32                35 SSW AERO  M  RMY 37
10/19 79/58/69/+19/0.00/549/84                29 SSW AERO  M  RMY N/A
10/20 64/54/59/+9/…./429/66                 23 ENE AERO  M  RMY 22
10/21 75/57/66/+16/…./142/22                30 ESE AERO  M  RMY 31
10/22 65/40/53/+4/…./…/..                 37 WSW AERO  M  RMY 50

10/23 Low temp since midnight is 41F; normal low is now 40F

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

RECORDS FOR OCTOBER 23
HIGH 82F IN 1947
LOW 24F IN 1969
PRECIP 3.66 INCHES IN 2014
SNOWFALL 3.0 INCHES IN 1891
PEAK GUST 78e MPH NW IN 1941

RECORDS FOR OCTOBER 24
HIGH 79F IN 1963
LOW 22F IN 1969
PRECIP 2.96 INCHES IN 1890
SNOWFALL 1.8 INCHES IN 1960
PEAK GUST 70 MPH SE IN 1959

TODAY’S REPORT PREPARED BY: Lizzy Suzedell