Sunday, November 25, 2018

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, NOVEMBER 25, 2018
ALL TIMES ARE IN EASTERN STANDARD TIME

FOGGY DAY WITH ON AND OFF PRECIPITATION AND NORTH-
WESTERLY WIND…

Fog has stayed in the area throughout the day today, with
a maximum visibility observed of 5 miles. Rain was steady
early this morning decreasing to a light drizzle before
the afternoon. So far today we reached a maximum temperature
of 43F at 8 A.M., 4 degrees below our normal maximum
temperature of 47F. The temperature has been dropping since
8 o’clock, with a current temperature of 42F at the 1 o’clock
observation. This is likely due to a persistent wind coming
from the northwest.

Today’s Observations:

7 A.M.
Weather: Fog, light drizzle
Temperature: 43F; Dew Point: 43F; Wind: ENE at 20G36 kts
Peak wind: 29 knots ENE at 6:55 A.M.
Sea-level pressure: 29.68 ins. Hg, falling then more quickly
Visibility: 1/2 mile, fog
6-hr Max temp: 43F
6-hr Min temp: 41F
24-hr Precip: 0.87 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1155 X 1/2L-F 051/43/43/0720G36/968/ PK WND 0729/55/
8//// 70087 58027 10043 20041

10 A.M.
Weather: Fog
Temperature: 42F; Dew Point: 42F; Wind: NNW at 6 kts,
Sea-level pressure: 29.76 ins. Hg, rising, then more quickly
Visibility: 1/16 mile, visibility obstructed by fog
3-hr Precip: 0.03 ins.
3-hr snowfall: 0.0 ins.
BHO SA 1455 W3 X 1/16F 077/42/42/3406/976/ WND LGT/ 8////
6003/ 53026

1 P.M.
Weather: Overcast stratus, fog
Temperature: 42F; Dew Point: 42F; Wind: NNW at 6 kts
Sea-level pressure: 29.79 ins. Hg, rising unsteadily
Visibility: 5 miles, visibility obstructed by fog
6-hr Max temp: 43F
6-hr Min temp: 41F
6-hr Precip: 0.07 ins.
6-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1755 E6 OVC 5F 089/42/42/3406/979/ WND LGT/
8/6// 6007/ 53012 10043 20041

SUMMARY FOR SATURDAY, NOVEMBER 24, 2018

TEMPERATURE (DEGREES F)
MAX…..43   NORMAL…..47
MIN…..24   NORMAL…..31
MEAN….34   NORMAL…..39

DEPARTURE FROM 30-YEAR NORMAL……………………-5
TOTAL DEPARTURE FOR THE MONTH…………………..-80 [-3.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..31   DEPARTURE………+5
TOTAL HEATING UNITS FOR THE MONTH………….614   DEPARTURE……..+80
TOTAL HEATING UNITS FOR THE SEASON………..1158   DEPARTURE……..+61
TOTAL HEATING UNITS LAST SEASON TO DATE…….814   DIFFERENCE……+344

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..27  SW AT  5:08 A.M.
AERO…………………….27 ESE AT  8:58 P.M.
ASOS…………………….27  SW AT  5:09 A.M.
DAVIS……………………27 WSW AT  1:03 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………….22 ESE AT  9:01 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….21 ESE AT  9:10 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………22 ESE AT  8:59 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..13.1  SW
ASOS…………………..13.2
DAVIS………………….13.4  SW [220 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.87  DEPARTURE…….+0.71
ASOS…………..0.90
TOTAL PRECIPITATION FOR THE MONTH……….8.73  DEPARTURE…….+4.95
ASOS…………..9.08
TOTAL PRECIPITATION FOR THE YEAR……….61.78  DEPARTURE……+14.41
ASOS………….63.95

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE……..-0.2
TOTAL SNOWFALL FOR THE MONTH…………….7.6  DEPARTURE……..+6.2
TOTAL SNOWFALL FOR THE SEASON……………7.6  DEPARTURE……..+5.9

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/…./006/01         25 SSW AERO 24 SSW RMY N/A
11/02 65/52/59/+13/…./000/00         37 SSW AERO 41 SSW RMY N/A
11/03 64/42/53/+7/…./144/24          59 W   AERO 60 W   RMY 58
11/04 52/37/45/0/…./570/96           31 W   AERO 30 W   RMY N/A
11/05 49/40/45/0/…./000/00           30 ENE AERO 29 ENE RMY 28
11/06 58/45/52/+7/…./000/00          29 SSW AERO 29 SSW RMY 31
11/07 60/50/55/+10/…./456/98         30 WSW AERO 30 WSW RMY 32
11/08 52/37/45/+1/…./234/78          29 WNW AERO 26 WNW RMY 23
11/09 48/34/41/-3/…./000/00          43 E   AERO 40 E   RMY 42
11/10 45/32/39/-5/…./576/100         45 W   AERO 47 WNW RMY 46
11/11 43/30/37/-6/0.00/462/80          32 WNW AERO 30 W   RMY 32
11/12 48/27/38/-5/0.00/000/00          18 SW  AERO 18 SW  RMY N/A
11/13 52/37/45/+2/…./458/80          44 WNW AERO 44 WNW RMY 48
11/14 37/20/29/-13/…./000/00         45 WNW AERO 50 WNW RMY 50
11/15 30/19/25/-17/…./…/..         33 E   AERO 36 E   RMY N/A
11/16 41/30/36/-6/…./…/..          43 E   AERO 44 ENE RMY N/A
11/17 45/34/40/-1/0.00/…/..          28 W   AERO 27 W   RMY 28
11/18 40/30/35/-6/0.00/…/..          21 W   AERO 21 W   RMY M
11/19 38/33/36/-5/…./…/..          16 E   AERO 14 E   RMY N/A
11/20 38/31/35/-5/…./…/..          30 NE  AERO 30 NE  RMY N/A
11/21 39/20/30/-10/…./…/..         40 WNW AERO 46 WNW RMY 47
11/22 20/09/15/-25/…./…/..         36 NW  AERO 41 NW  RMY 42
11/23 30/09/20/-19/0.00/…/..         25 SW  AERO 25 SW  RMY 27
11/24 43/24/34/-5/…./…/..          27 SW  AERO 27 ESE RMY N/A

11/25 Low temp since midnight is 41F; normal low is 31F

DAILY RECORDS FOR NOVEMBER 2017

11/22/18: DAILY RECORD LOW MAXIMUM TEMPERATURE OF 20F,
BREAKS PREVIOUS RECORD OF 26F SET IN 1972 AND 2008
11/22/18: DAILY RECORD LOW MINIMUM TEMPERATURE OF 9F,
BREAKS PREVIOUS RECORD OF 12F SET IN 1987
11/23/18: DAILY RECORD LOW MINIMUM TEMPERATURE OF 9F,
TIES PREVIOUS RECORD OF 9F SET IN 1888

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: Samantha Richard