Thursday, November 16, 2017

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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, NOVEMBER 16, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME

LOW PRESSURE BRINGS LIGHT RAIN AND MODERATE WIND…

Pressure began dropping yesterday morning around 10:00
A.M. EST. With the drop in pressure we observed a
notable change in sky cover from scattered cumulus
to broken stratocumulus. The light rain began this
morning around 7:45 A.M. EST with a midday break
and continuing again just before 1:00 P.M. EST.
A trace was measured at 10:00 A.M. and 0.01 inches
was measured at 1:00 PM. Visibility was reduced to
10 miles at 1:00 P.M. EST due to light rain and fog.
Skies were overcast for most of the day with a midday
break in cloud cover allowing the sun to warm to a
seasonable high of 51F. Winds have been moderate and
from the southeast today with a peak gust of 28 kts
(32 MPH).

Today’s Observations:

7 A.M.
Weather: Broken stratus, overcast altostratus
Temperature: 41F; Dew Point: 37F; Wind: SE at 15G24 kts
Sea-level pressure: 29.96 ins. Hg, falling, then more slowly
Visibility: 30 miles, distant fog in all directions
6-hr Max temp: 41F
6-hr Min temp: 37F
24-hr precip: 0.00 ins.
BHO SA 1155 E48 BKN E110 OVC 30 146/41/37/1315G24/996/ DSNT
FG ALQDS/ 8/62/ 56027 10041 20037

10 A.M.
Weather: Scattered stratocumulus, broken altostratus,
few distant cumulus S-SSW
Temperature: 45F; Dew Point: 39F; Wind: SE at 15G24 kts,
Peak Wind: 26 kts (30 MPH) at 9:10 A.M. EST
Sea-level pressure: 29.90 ins. Hg, falling, then more rapidly
Visibility: 35 miles distant fog in all directions
BHO SA 1455 50 SCT E70 BKN 35 126/45/39/1415G24/990/ FEW CU DSNT
S-SSW DSNT FG ALQDS PK WND 1426/10/ 8/510 58020 MANUAL 600//

1 P.M.
Weather: Light Rain, overcast stratus
Temperature: 47F; Dew Point: 43F; Wind: SSE at 12G24 kts
Sea-level pressure: 29.76 ins. Hg, falling, then more rapidly
Visibility: 10 miles distant fog in all directions
6-hr Max temp: 51F
6-hr Min temp: 41F
6-hr precip: 0.01 ins.
BHO SA 1755 E18 OVC 10R- 077/47/43/1512G24/976/ DSNT FG ALQDS/
8/6// 56049 MANUAL 6001/ 10051 20041

SUMMARY FOR WEDNESDAY, NOVEMBER 15, 2017

TEMPERATURE (DEGREES F)
MAX…..43   NORMAL…..50
MIN…..31   NORMAL…..34
MEAN….37   NORMAL…..42

DEPARTURE FROM 30-YEAR NORMAL…………………….-5
TOTAL DEPARTURE FOR THE MONTH…………………….-6 [-0.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..28   DEPARTURE………..5
TOTAL HEATING UNITS FOR THE MONTH………….322   DEPARTURE……….10
TOTAL HEATING UNITS FOR THE SEASON…………590   DEPARTURE……..-285
TOTAL HEATING UNITS LAST SEASON TO DATE…….680   DIFFERENCE……..-90

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….20 NE  AT 11:18 A.M.
AERO……………………15 NE  AT 11:18 A.M.
ASOS……………………19 ENE AT 11:20 A.M.
DAVIS…………………..17 E   AT 11:19 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY…………………14 ESE AT 11:59 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………14 SE  AT 11:59 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..13 SE  AT 11:58 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..8.8 N
ASOS…………………..9.2
DAVIS………………….8.3 ENE [063 DEG.]

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……….0.52  DEPARTURE……-1.84
ASOS…………..0.49
TOTAL PRECIPITATION FOR THE YEAR……….48.32  DEPARTURE……+2.19
ASOS……………N/A ***
*** ASOS annual total not available due to erroneous readings

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  53/39/46/0/0.00/167/27           25 SE  AERO 24 SE  RMY 25
11/2  71/49/60/+14/0.00/000/00         28 SSE AERO 25 SSE RMY 27
11/3  74/47/61/+15/T/350/57            35 WNW AERO 35 WNW RMY 38
11/4  54/39/47/+2/0.00/545/89          31 NW  AERO 31 NW  RMY N/A
11/5  61/46/54/+9/0.01/006/01          26 S   AERO 24 S   RMY N/A
11/6  64/47/56/+11/0.05/000/00         32 S   AERO 28 SSW RMY 35
11/7  46/35/41/-4/0.11/145/24          26 NNW AERO 23 N   RMY 26
11/8  43/34/39/-5/0.08/295/49          26 N   AERO 23 N   RMY 27
11/9  50/31/41/-3/0.01/…/..          25 S   AERO 23 S   RMY N/A
11/10 45/20/33/-11/0.00/…/..         46 WNW AER0 44 WNW RMY 46
11/11 36/18/27/-16/0.00/…/..         28 WNW AERO 26 WNW RMY 28
11/12 44/27/36/-7/0.00/…/..          13 E   AERO  9 S   RMY 14
11/13 40/35/38/-5/…/…/..           20 NNW AERO 17 NNW RMY 20
11/14 40/33/37/-5/…/…/..           18 N   AERO 15 N   RMY 18
11/15 43/31/37/-5/0.00/…/..          20 NE  AERO 15 NE  RMY N/A

11/16 Low temp since midnight is 35F; normal low is now 34F

DAILY RECORDS FOR NOVEMBER 2017

11/10/17: DAILY RECORD LOW MINIMUM TEMPERATURE OF 20F,
TIES WITH PREVIOUS RECORD SET IN 2004

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

RECORDS FOR NOVEMBER 16
HIGH 73 IN 1927
LOW 8 IN 1933
PRECIP 2.25 INCHES IN 1981
SNOWFALL 2.0 IN 1913
PEAK GUST 78 S IN 1989

RECORDS FOR NOVEMBER 17
HIGH 74 IN 1928
LOW 10 IN 1924
PRECIP 1.92 INCHES IN 1920
SNOWFALL 1.0 INS IN 1980
PEAK GUST 61 SSE IN 2006

TODAY’S REPORT PREPARED BY: Kaitlin Geagan