Tuesday, December 6, 2016

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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, DECEMBER 6, 2016

SUNNY SKIES RETURN AND MELT REMAINING SNOW

Patches of yesterday’s snow were still on the ground this morning,
but have finally melted under mostly clear skies.  By afternoon,
skies became broken with cirrus; however, they were still able to
let in enough sunshine to increase temperatures and continue the
dry conditions.  Temps. rose into the low-40s, while dew points
remained in the upper-20’s today.

PRELIMINARY STATS FOR NOVEMBER 2016

TEMPERATURE, Deg. F
Avg. Max. 52.8 [+2.8] Avg. Min. 36.3 [+2.8] Mean      44.6 [+2.9] 24-hour corrected mean: 44.0
Max. for month: 69F on 2nd
Min. for month: 28F on 21st, 22nd, 23rd, 28th

HEATING DEGREE DAYS
Total heating units: 609 [-89] Total for the season: 1030 [-231] Total for last season: 1002

PRECIPITATION, Inches
Total: 2.61 [-2.15] Greatest in 24 hrs: 1.27 in. on 15th-16th

WIND, mph
Avg. uncorrected wind speed: 11.5
Avg. corrected wind speed: 11.9
Prevailing wind direction: NW at 17%
Peak gust and direction: 45 ESE on 29th

SUNSHINE:
Campbell-Stokes card minutes: 9012 mins. of possible 17010 mins. or 53%
Astronomical total minutes: 9315 mins. of possible 17593 mins. or 53%

7 A.M.
Weather: Few cumulus NE-SE, few cirrus ESE-SW
Temperature: 30F; Dew Point: 27F; Wind: NW at 8 kts
Sea-level pressure: 30.13 ins. Hg, rising, then more quickly
Visibility: 50 miles, distant fog in all directions
6-hr Max temp: 32F
6-hr Min temp: 30F
24-hr precip: 0.13 in.
24-hr snowfall: 0.4 in.
BHO SA 1155 CLR 50 203/30/27/3108/013/ FEW CU NE-SE FEW CI ESE-SW
DSNT FG ALQDS/ 8/101 51010 MANUAL 70013 ASOS 70016 10032 20030

10 A.M.
Weather: Few cumulus NE-ESE, few cirrus in all directions
Temperature: 37F; Dew Point: 30F; Wind: NNW at 5 kts,
Wind Speed: Light
Sea-level pressure: 30.15 ins. Hg, steady then rising
Visibility: 70 miles
BHO SA 1455 CLR 70 211/37/30/3305/015/ FEW CU NE-ESE FEW CI ALQDS
WND LGT/ 8/101 53008

1 P.M.
Weather: Few cumulus NW-ESE, few altocumulus S-W, broken cirrus
Temperature: 42F; Dew Point: 26F; Wind: N at 7 kts
Sea-level pressure: 30.09 ins. Hg, falling, then more quickly
Visibility: 70 miles
6-hr Max temp: 42F
6-hr Min temp: 30F
BHO SA 1755 E250 BKN 70 188/42/26/3507/009/ FEW CU NW-ESE FEW AC S-W/
8/162 58023 10042 20030

SUMMARY FOR MONDAY, DECEMBER 5, 2016

TEMPERATURE (DEGREES F)
MAX…..36   NORMAL…..43
MIN…..27   NORMAL…..27
MEAN….32   NORMAL…..35

DEPARTURE FROM 30-YEAR NORMAL……………………-3
TOTAL DEPARTURE FOR THE MONTH…………………..+12 [+2.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..33   DEPARTURE……….+3
TOTAL HEATING UNITS FOR THE MONTH………….134   DEPARTURE………-12
TOTAL HEATING UNITS FOR THE SEASON………..1164   DEPARTURE……..-244
TOTAL HEATING UNITS LAST SEASON TO DATE……1119   DIFFERENCE……..+45

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….26 W   AT 9:14 P.M.
ASOS……………………27 W   AT 9:32 P.M.
DAVIS…………………..27 SW  AT 9:31 P.M. RMY 29
FASTEST MILE FOR YESTERDAY…………………20 W   AT 9:11 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………21 W   AT 9:40 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..18 WSW AT 9:40 P.M.
AVERAGE WIND SPEED AND DIRECTION………….10.1 WSW
ASOS………………….10.3
DAVIS………………….9.0 SW [220 Deg.] *last of multiple occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.13  DEPARTURE……-0.04
ASOS…………..0.16
TOTAL PRECIPITATION FOR THE MONTH……….0.33  DEPARTURE……-0.49
ASOS…………..0.37
TOTAL PRECIPITATION FOR THE YEAR……….37.30  DEPARTURE…..-12.05
ASOS………….37.80

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.4  DEPARTURE…….+0.1
TOTAL SNOWFALL FOR THE MONTH…………….0.4  DEPARTURE…….-1.0
TOTAL SNOWFALL FOR THE SEASON……………0.4  DEPARTURE…….-3.6

PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/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/-4/0.00/0.0/600/97           22 SSE AERO 22 S   RMY N/A
11/2  69/45/57/+11/0.00/0.0/425/69          24 SSW AERO 24 S   RMY 26
11/3  65/49/57/+11/0.01/0.0/025/04          38 W   AERO 41 W   RMY 38
11/4  56/35/46/+1/0.00/0.0/587/96           26 NW  AERO 26 NW  RMY 30
11/5  55/32/44/-1/0.00/0.0/250/41           24 W   AERO 23 W   RMY 24
11/6  49/39/44/-1/0.04/T/091/15             23 N   AERO 23 N   RMY 23
11/7  46/33/40/-5/0.00/0.0/423/70           21 N   AERO 21 N   RMY 20
11/8  64/36/50/+6/0.00/0.0/590/98           17 W   AERO 15 SSW RMY N/A
11/9  60/43/52/+8/T/0.0/090/15              22 NNW AERO 22 NW  RMY N/A
11/10 52/34/43/-1/0.00/0.0/507/85           28 SSW AERO 30 SSW RMY 31
11/11 59/35/47/+4/0.00/0.0/565/95           39 NW  AERO 44 NW  RMY 45
11/12 47/31/39/-4/0.00/0.0/569/96           38 NW  AERO 44 NW  RMY 23
11/13 59/37/48/+5/0.00/0.0/519/88           23 W   AERO 22 W   RMY N/A
11/14 66/44/55/+13/0.00/0.0/547/93          24 WSW AERO 22 WSW RMY 25
11/15 57/46/52/+10/1.23/0.0/000/00          32 ENE AERO 33 ENE RMY 35
11/16 57/45/51/+9/0.04/0.0/000/00           26 W   AERO 25 W   RMY 28
11/17 55/41/48/+7/0.00/0.0/169/29           25 WNW AERO 29 NW  RMY 29
11/18 60/38/49/+8/0.00/0.0/580/100          21 NNE AERO 22 N   RMY 23
11/19 53/40/47/+6/0.02/0.0/445/77           18 ENE AERO 18 ENE RMY N/A
11/20 46/29/38/-2/0.04/0.0/006/01           37 SW* AERO 40 SW  RMY N/A
11/21 36/28/32/-8/T/T/138/24                40 W   AERO 44 W   RMY 44
11/22 41/28/35/-5/0.00/0.0/555/97           35 W   AERO 37 W   RMY 36
11/23 43/28/36/-3/0.00/0.0/542/95           32 WNW AERO 33 WNW RMY N/A
11/24 41/29/35/-4/0.05/T/000/00             15 NNE AERO 13 NNE RMY N/A
11/25 46/38/42/+3/0.08/0.0/000/00           24 SE  AERO 23 SE  RMY 25
11/26 45/36/41/+3/0.00/0.0/085/15           18 NW  AERO 17 NW  RMY 28
11/27 44/30/37/-1/0.00/0.0/451/80           26 W   AERO 26 WNW RMY 29
11/28 44/28/36/-2/0.00/0.0/556/99           22 WNW AERO 21 WNW RMY 22
11/29 57/37/47/+10/0.46/0.0/000/00          45 ESE AERO 47 SSE*RMY 47
11/30 57/45/51/+14/0.64/0.0/000/00          32 ENE AERO 33 E   RMY 31

PRELIMINARY CLIMATE SUMMARY FOR DECEMBER CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/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

12/1  55/39/47/+10/0.20/0.0/000/00          36 W   AERO 37 W   RMY 36
12/2  48/34/41/+5/0.00/0.0/…/..           32 W   AERO 32 W   RMY N/A
13/3  44/31/38/+2/0.00/0.0/…/..           37 WNW AERO 39 WNW RMY 40
12/4  39/27/33/-2/0.00/0.0/…/..           25 NW  AERO 25 NW  RMY N/A
12/5  36/27/32/-3/0.13/0.4/…/..           26 W   AERO 25 W   RMY 29

12/6  Low temp since midnight is 30F; normal low is now 27F

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

RECORDS FOR DECEMBER 6
HIGH 70 IN 2001
LOW 5 IN 1901,1935
PRECIP 2.78 INS. IN 2003
SNOWFALL 17.0 INS. IN 2003
PEAK GUST 74 MPH NW IN 1981

RECORDS FOR DECEMBER 7
HIGH 74 IN 1998
LOW 6 IN 1906
PRECIP 1.67 INS. IN 1953
SNOWFALL 6.3 INS. IN 2003
PEAK GUST 76e SE IN 1976

TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle