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

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, NOVEMBER 24, 2018 
ALL TIMES ARE IN EASTERN STANDARD TIME

WARMER TEMPERATURES ARRIVING TODAY AHEAD OF 
APPROACHING RAIN STORM...

The lowest temperature overnight of 23F occurred late
Friday evening, and the temperature has climbed since
then to the upper 20's by day break to the low 40s by
early afternoon today. Dew points near -5F continued
into Friday evening as well before climbing into the
teens this morning and the low 30's by mid-day. The
sky remained mostly cloudy with the sun filtered through
thin cirrus much of the day, but lower clouds began
arriving around 2 PM as the next rain storm approaches
the area. With the temperature remaining below freezing
for more than sixty hours from late Wednesday until this
morning, nearby Ponkapoag Pond froze over late on the
23rd. Houghton's Pond reached about 8/10 ice cover
early this morning before beginning to melt once again
as the temperature reached 40 degrees today.  

Today's Observations:

7 A.M.
Weather: Scattered altocumulus, scattered dense cirrus, 
thin overcast cirrus
Temperature: 27F; Dew Point: 17F; Wind: WSW at 13 kts  
Sea-level pressure: 30.23 ins. Hg, falling then steady      
Visibility: 45 miles, visibility WSW-NW 40, NE-SE 50
6-hr Max temp: 27F
6-hr Min temp: 25F
24-hr Precip: 0.00 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 0 ins.   
BHO SA 1155 150 SCT 220 SCT 250 –OVC 45 236/27/17/2413/023/ 
VSBY WSW-NW 40 NE-SE 50/ 8/071 56003 10027 20025

10 A.M.
Weather: Scattered dense cirrus, thin broken cirrus, few
altocumulus distant SW-W
Temperature: 35F; Dew Point: 23F; Wind: WSW at 10 kts,   
Sea-level pressure: 30.20 ins. Hg, falling then more slowly
Visibility: 50 miles
3-hr Precip: 0.00 ins. 
3-hr snowfall: 0.0 ins. 
BHO SA 1455 220 SCT 250 –BKN 50 226/35/23/2410/020/ FEW AC 
DSNT SW-W/ 8/071 58010

1 P.M.
Weather: Scattered cirrostratus (advancing), thin broken
cirrus, few stratocumulus distant SSE-NW (advancing)  
Temperature: 27F; Dew Point: -6F; Wind: WSW at 5 kts  
Sea-level pressure: 30.46 ins. Hg, falling steadily      
Visibility: 50 miles, visibility SW-WNW 40
6-hr Max temp: 43F
6-hr Min temp: 27F
6-hr Precip: 0.00 ins.
6-hr snowfall: 0.0 ins.
Snow depth: 0 ins.   
BHO SA 1755 220 SCT 250 –BKN 50 187/42/30/2411/008/ FEW SC 
DSNT SSE-NW VSBY SW-WNW 40/ 8/105 56039 10043 20027

 
SUMMARY FOR FRIDAY, NOVEMBER 23, 2018 

TEMPERATURE (DEGREES F)
MAX.....30   NORMAL.....47
MIN......9   NORMAL.....31
MEAN....20   NORMAL.....39

DEPARTURE FROM 30-YEAR NORMAL.......................-19
TOTAL DEPARTURE FOR THE MONTH.......................-75 [-3.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............45   DEPARTURE........+19
TOTAL HEATING UNITS FOR THE MONTH.............583   DEPARTURE........+75
TOTAL HEATING UNITS FOR THE SEASON...........1127   DEPARTURE........+56
TOTAL HEATING UNITS LAST SEASON TO DATE.......788   DIFFERENCE......+339

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................25  SW AT  8:05 P.M.
                   AERO.........................25  SW AT  8:05 P.M. 
                   ASOS.........................27 SSW AT  8:06 P.M. 
                   DAVIS........................27   W AT 12:07 A.M. RMY 27
FASTEST MILE FOR YESTERDAY......................20  SW AT 11:32 P.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...................20  SW AT  8:45 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................20  SW AT  8:45 P.M.
AVERAGE WIND SPEED AND DIRECTION..............12.5  SW
                   ASOS.......................12.2
                   DAVIS......................12.3   W [279 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..........7.86  DEPARTURE.......+4.24
                         ASOS..............8.18 
TOTAL PRECIPITATION FOR THE YEAR..........60.91  DEPARTURE......+13.70
                         ASOS.............63.05

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE........-0.1
TOTAL SNOWFALL FOR THE MONTH................7.6  DEPARTURE........+6.4
TOTAL SNOWFALL FOR THE SEASON...............7.6  DEPARTURE........+6.1


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 Low temp since midnight is 24F; 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 24
HIGH 69 IN 1931
LOW 7 IN 1897
PRECIP 1.76 INCHES IN 1901
SNOWFALL 4.5 INS IN 1936
PEAK GUST 69 SSW IN 1959

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

TODAY'S REPORT PREPARED BY: Mike Iacono / Ben Turner