Saturday, November 25, 2017

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, NOVEMBER 25, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME

SOUTHERLY WIND BRINGS BACK ABOVE SEASONABLE TEMPERATURES…

Warm wind from the south brought above seasonable
temperatures to Great Blue Hill today. We have had
a max so far of 57F by 1:00 P.M. EST. This is 10
degrees above the daily normal of 47F. The southern
wind has been moderate frequently gusting over 22 kts
(26 MPH).
Sky has remained mostly clear with cloud cover increasing,
from a few cirrus to scattered altocumulus and scattered
cirrus, throughout the day. Visibility was hindered to
only 30-45 miles in the morning due to a distant haze,
but as the humidity dropped today visibility increased
to a maximum of 60 miles by 1:00 P.M. EST.

Today’s Observations:

7 A.M.
Weather: Clear, few altocumulus WSW-NW
Temperature: 40F; Dew Point: 36F; Wind: SSW at 18 kts
Sea-level pressure: 29.82 ins. Hg, falling, then more quickly
Visibility: 30 miles, distant haze
6-hr Max temp: 40F
6-hr Min temp: 38F
24-hr precip: 0.00 ins.
BHO SA 1155 CLR 30 099/40/36/2118/982/ FEW AC WSW-NW
DSNT HZ/ 8/060 58012 10040 20038

10 A.M.
Weather: Clear, few cirrus clouds SSW-NNE
Temperature: 49F; Dew Point: 37F; Wind: S at 14G24 kts
Sea-level pressure: 29.79 ins. Hg, falling, then more quickly
Visibility: 45 miles, distant haze
3-hr precip: 0.00 ins.
BHO SA 1455 CLR 45 087/49/37/1914G24/979/ FEW CI SSW-NNE
DSNT HZ/ 8/001 58012

1 P.M.
Weather: Scattered altocumulus, scattered cirrus
Temperature: 57F; Dew Point: 35F; Wind: SSW at 15G23 kts
Sea-level pressure: 29.69 ins. Hg, falling, then more slowly
Visibility: 60 miles, distant haze
6-hr Max temp: 57F
6-hr Min temp: 38F
6-hr precip: 0.00 ins.
BHO SA 1755 150 SCT 230 SCT 60 054/57/35/2015G23/969/ DSNT HZ/
8/031 56033 10057 20038

SUMMARY FOR FRIDAY, NOVEMBER 24, 2017

TEMPERATURE (DEGREES F)
MAX…..49   NORMAL…..47
MIN…..29   NORMAL…..31
MEAN….39   NORMAL…..39

DEPARTURE FROM 30-YEAR NORMAL……………………….0
TOTAL DEPARTURE FOR THE MONTH……………………..-12 [-0.7 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………26   DEPARTURE………..0
TOTAL HEATING UNITS FOR THE MONTH………..546   DEPARTURE………+12
TOTAL HEATING UNITS FOR THE SEASON……….814   DEPARTURE……..-283
TOTAL HEATING UNITS LAST SEASON TO DATE…..894   DIFFERENCE……..-80

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….28 SSW AT 11:31 P.M.
AERO……………………26 SSW AT 11:32 P.M.
ASOS……………………28 SSW AT 11:31 P.M.
DAVIS…………………..30 SSW AT 11:31 P.M. RMY 29
FASTEST MILE FOR YESTERDAY…………………21 SSW AT 11:32 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………21 SSW AT 11:59 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..21 SSW AT 11:21 P.M.
AVERAGE WIND SPEED AND DIRECTION………….11.5 SSW
ASOS………………….11.8
DAVIS…………………11.3 SW  [227 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……….2.04  DEPARTURE……-1.59
ASOS…………..2.00
TOTAL PRECIPITATION FOR THE YEAR……….49.84  DEPARTURE……+2.44
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/-3/0.01/480/80          25 S   AERO 23 S   RMY N/A
11/10 45/20/33/-11/0.00/586/98         46 WNW AER0 44 WNW RMY 46
11/11 36/18/27/-16/0.00/589/99         28 WNW AERO 26 WNW RMY 28
11/12 44/27/36/-7/0.00/302/51          13 E   AERO  9 S   RMY 14
11/13 40/35/38/-5/0.26/000/00          20 NNW AERO 17 NNW RMY 20
11/14 40/33/37/-5/T/000/00             18 N   AERO 15 N   RMY 18
11/15 43/31/37/-5/0.00/417/71          20 NE  AERO 15 NE  RMY N/A
11/16 51/37/44/+2/…./012/02          32 SE  AERO 32 SE  RMY N/A TSTM
11/17 42/30/36/-5/0.00/…/..          41 WNW AERO 43 WNW RMY 47
11/18 49/26/38/-3/…./…/..          35 SSW AERO 35 SSW RMY 39
11/19 58/34/46/+5/…./…/..          50 W   AERO 50 W   RMY 54
11/20 39/31/35/-5/0.00/…/..          48 WNW AERO 50 WNW RMY 44
11/21 57/35/46/+6/…/…/..           46 SSW AERO 46 SSW RMY 48
11/22 53/35/44/+4/…/…/..           37 NW  AERO 38 NW  RMY 41
11/23 40/26/33/-6/0.00/…/..          26 NW  AERO 25 NW  RMY N/A
11/24 49/29/39/0/0.00/…/..           28 SSW AERO 26 SSW RMY 29

11/25 Low temp since midnight is 38F; normal low is now 31F

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 25
HIGH 71 IN 1979
LOW 13 IN 1938
PRECIP 3.10 INCHES IN 1983
SNOWFALL 8.0 INS IN 1888
PEAK GUST 94e E IN 1950

RECORDS FOR NOVEMBER 26
HIGH 66 IN 1979
LOW 6 IN 1938
PRECIP 2.22 INS IN 1888
SNOWFALL 3.0 INS IN 1974
PEAK GUST 78 SSE IN 1964

TODAY’S REPORT PREPARED BY: Kaitlin Geagan