Saturday, November 12, 2016

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, NOVEMBER 12, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME

GUSTY WINDS CONTINUES INTO EARLY MORNING HOURS
AS COLDER AIR ARRIVES TODAY…

The peak gust overnight was 39 mph NW at 11:37 PM with two
gust to the same speed occurring at 1:02 PM from the WNW and
3:38 PM from the NW yesterday. The sky was nearly completely
clear much of the morning, then a few high thin cirrus clouds
moved in without blocking the bright sunshine. Dew points
have been down in the upper teens today, and the visibility
has been excellent near 80 miles.

7 A.M.
Weather: Clear, few stratocumulus offshore distant E-SE,
few altocumulus distant WNW-N
Temperature: 31F; Dew Point: 18F; Wind: NW at 9 kts
Sea-level pressure: 30.20 ins. Hg, rising
Visibility: 80 miles
6-hr Max temp: 34F
6-hr Min temp: 31F
24-hr precip: 0.00 in.
BHO SA 1155 CLR 80 228/31/18/3109/020/ FEW SC OFFSHR DSNT
E-SE FEW AC DSNT WNW-N/ 8/530 53033 10034 20031

10 A.M.
Weather: Clear, few cumulus distant SE, few altocumulus ENE
and distant WNW-NW, few cirrus distant W-NNE
Temperature: 38F; Dew Point: 19F; Wind: NW at 10 kts
Sea-level pressure: 30.23 ins. Hg, rising
Visibility: 80 miles
BHO SA 1455 CLR 80 238/38/19/3110/023/ FEW CU DSNT SE
FEW AC ENE AND DSNT WNW-NW FEW CI DSNT W-NNE/ 8/131 50010

1 P.M.
Weather: Thin scattered cirrus, few lower dense cirrus W-N
Temperature: 44F; Dew Point: 18F; Wind: W at 10 kts
Sea-level pressure: 30.18 ins. Hg, falling, then more quickly
Visibility: 80 miles
6-hr Max. temp: 45F
6-hr Min. temp: 31F
BHO SA 1755 250 -SCT 80 220/44/18/2610/018/ FEW LWR DNS
CI W-N/ 8/001 58018 10045 20031

SUMMARY FOR FRIDAY, NOVEMBER 11, 2016

TEMPERATURE (DEGREES F)
MAX…..59   NORMAL…..52
MIN…..35   NORMAL…..35
MEAN….47   NORMAL…..43

DEPARTURE FROM 30-YEAR NORMAL……………………+4
TOTAL DEPARTURE FOR THE MONTH…………………..+29 [+2.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..18   DEPARTURE……….-4
TOTAL HEATING UNITS FOR THE MONTH………….193   DEPARTURE………-29
TOTAL HEATING UNITS FOR THE SEASON…………614   DEPARTURE……..-171
TOTAL HEATING UNITS LAST SEASON TO DATE…….573   DIFFERENCE……..+41

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….39  NW AT 11:37 P.M. *
ASOS……………………43  NW AT  3:58 P.M.
DAVIS…………………..42  NW AT  3:58 P.M. RMY 45
FASTEST MILE FOR YESTERDAY…………………30  NW AT  1:17 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………29  NW AT  2:35 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..29 WNW AT  1:18 P.M.
AVERAGE WIND SPEED AND DIRECTION………….18.7  NW
ASOS………………….17.8
DAVIS…………………16.3   W [281 Deg.] * Last of several occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.16
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.05  DEPARTURE……-1.67
ASOS…………..0.07
TOTAL PRECIPITATION FOR THE YEAR……….34.41  DEPARTURE…..-11.08
ASOS………….34.77

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

11/1  55/29/42/-4/0.00/600/97           22 SSE AERO 22 S   RMY N/A
11/2  69/45/57/+11/0.00/425/69          24 SSW AERO 24 S   RMY 26
11/3  65/49/57/+11/0.01/025/04          38 W   AERO 41 W   RMY 38
11/4  56/35/46/+1/0.00/587/96           26 NW  AERO 26 NW  RMY 30
11/5  55/32/44/-1/0.00/250/41           24 W   AERO 23 W   RMY 24
11/6  49/39/44/-1/0.04/091/15           23 N   AERO 23 N   RMY 23
11/7  46/33/40/-5/0.00/423/70           21 N   AERO 21 N   RMY 20
11/8  64/36/50/+6/0.00/590/98           17 W   AERO 15 SSW RMY N/A
11/9  60/43/52/+8/T/090/15              22 NNW AERO 22 NW  RMY N/A
11/10 52/34/43/-1/0.00/507/85           28 SSW AERO 30 SSW RMY 31
11/11 59/35/47/+4/0.00/565/95           39 NW  AERO 44 NW  RMY 45

11/12 Low temp since midnight is 31F; normal low is now 35F

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

RECORDS FOR NOVEMBER 12
HIGH 74 IN 1909
LOW 18 IN 1926
PRECIP 3.25 INCHES IN 1947
SNOWFALL 8.1 INCHES IN 1987
PEAK GUST 79e MPH NW IN 1947

RECORDS FOR NOVEMBER 13
HIGH 66 IN 1931, 1964
LOW 14 IN 1920
PRECIP 1.96 INCHES IN 1982
SNOWFALL 4.6 IN 2004
PEAK GUST 77 S IN 1982

TODAY’S REPORT PREPARED BY: Mike Iacono