BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, NOVEMBER 29, 2015 
ALL TIMES ARE IN EASTERN STANDARD TIME
 
LIGHT RAIN ENDED EARLY LAST EVENING AFTER 0.19 INCH IN ALL 
DAY LIGHT RAIN...FROST EARLY THIS MORNING COVERED THE GRASS AND 
MADE WOODEN SURFACES VERY SLIPPERY
 
Light rain on Saturday left 0.19 inch. Moisture left over during
last night resulted in fog and condensation which turned to frost
as temperatures fell from 38F at midnight to 28F by 7 a.m.
The frost covered the grass and wooden surfaces such and the roof
of the tower and the wooden step at the Hazen shelter were
extremely slippery and reason for caution when stepping on those
places up here at the summit.  
 
Today's Observations:
 
7 A.M.
Weather: Scattered dense cirrus, scattered cirrus (higher layer)
Temperature: 28F; Dew Point: 27F; Wind: NW at 7 kts
Sea-level pressure: 30.22 ins. Hg, rising slightly
Visibility: 10 miles, except S-SW 6 miles, fog, N 15 miles,
thin fog
6hr Max temp: 37F
6-hr Min temp: 28F
24-hr precip: 0.19 in.
BHO SA 1155 200 SCT 250 SCT 10 235/28/27/3207/022/ DNS CI LYR XTDNG 
E-S-W-OVHD MSTLY CLR SKY NW-NE PTCH DNS SHLW GF 3 W VSBY S-SW 6 N 15 
THN F ALQDS STRA LYR ALG HRZN SW-W FROST GRASSY/WOODEN SFCS/ 8/002 
53006 MANUAL 70019 AS0S 70019 10037 20028
 
10 A.M.
Weather: Clear, layer dense cirrus extending distant E-S-SW
Temperature: 34F; Dew Point: 26F; Wind: NNW at 8 kts,
Sea-level pressure: 30.15 ins.Hg, rising then falling slightly  
Visibility: 70 miles, except 80 miles NW 
BHO SA 1455 CLR 70 238/34/26/3308/023/ DNS CI LYR XTDNG E-S-SW RCDNG
FEW STRA ALG HRZN DSNT NE VSBY NW 80 LGT DSNT HZ/ 8/602 50003 
 
1 P.M.
Weather: Clear, stratocumulus layer distant offshore NNE-ESE,
dense cirrus, cirrus distant ESE-SW 
Temperature: 42F; Dew Point: 19F; Wind: NW at 8 kts,
Sea-level pressure: 30.21 ins. Hg, falling then increasing
Visibility: 80 miles
6-hr max. temp: 42F
6-hr min. temp: 28F
BHO SA 1755 CLR 80 231/40/19/3208/021/ SC LYR OFFSHR DSNT NNE-ESE
LYR DNS CI/CI DSNT ESE-SW/ 8/502 56007 10042 20028 
 
SUMMARY FOR SATURDAY, NOVEMBER 28, 2015
  
TEMPERATURE (DEGREES F)
MAX.....55   NORMAL.....46
MIN.....38   NORMAL.....30
MEAN....47   NORMAL.....38

DEPARTURE FROM 30-YEAR NORMAL......................+9
TOTAL DEPARTURE FOR THE MONTH....................+157  [+5.4 DEGREES/DAY]
 
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............18   DEPARTURE..........-9
TOTAL HEATING UNITS FOR THE MONTH.............485   DEPARTURE........-157
TOTAL HEATING UNITS FOR THE SEASON............939   DEPARTURE........-268
TOTAL HEATING UNITS LAST SEASON TO DATE......1097   DIFFERENCE.......-158

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY...................23 WSW  AT  12:50 A.M. *
                   ASOS........................25 NE   AT  11:48 A.M.       
                   DAVIS.......................25 SW   AT  12:13 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY.....................16 SW   AT  12:18 A.M.     
MAXIMUM 2-MINUTE ASOS AVERAGE..................18 SW   AT  12:14 A.M.            
MAXIMUM 2-MINUTE DAVIS AVERAGE.................17 SW   AT  12:04 A.M.            
AVERAGE WIND SPEED AND DIRECTION...............10.0  NE
                   ASOS........................10.4     
                   DAVIS........................8.8  NNW [340 Deg.]   
* Last of several occurrences
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....0.19  DEPARTURE......+0.02
                         ASOS...............0.19
TOTAL PRECIPITATION FOR THE MONTH...........2.59  DEPARTURE......-1.86
                         ASOS...............2.61
TOTAL PRECIPITATION FOR THE YEAR...........39.42  DEPARTURE......-8.80 
                         ASOS................N/A ***
*** ASOS annual total not available due to erroneous readings
 
PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER CALENDAR DAY DATA
  DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/RMY 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
 
11/1  59/45/52/+6/T/006/01                  30 SSW RMY 31 
11/2  62/47/55/+9/0.00/476/77               24 W   RMY N/A
11/3  71/44/58/+12/0.00/616/100             25 W   RMY 25
11/4  66/49/58/+13/0.00/601/98              22 SSW RMY N/A
11/5  72/51/62/+17/0.00/281/46              31 SW  RMY 36 
11/6  71/60/66/+21/0.00/109/18              35 SSW RMY 38
11/7  64/46/55/+10/0.00/029/04              33 WNW RMY 35
11/8  54/39/47/+3/0.00/591/98               26 NW  RMY 30
11/9  59/38/49/+5/0.00/577/96               20 W   RMY 21
11/10 53/45/49/+5/..../000/00               28 NE  RMY N/A
11/11 48/43/46/+3/..../000/00               41 NE  RMY N/A
11/12 55/42/49/+6/..../000/00               28 S   RMY 30
11/13 57/41/49/+6/..../385/65               40 WSW RMY 47
11/14 45/31/38/-4/0.00/425/72               40 NW  RMY 47 
11/15 51/31/41/-1/0.00/241/41               25 W   RMY 27
11/16 59/36/48/+6/0.00/416/71               25 NNW RMY 29
11/17 45/28/37/-4/0.00/572/98               18 NNE RMY N/A
11/18 50/35/43/+2/0.00/575/99               17 SSE RMY N/A
11/19 55/38/47/+6/..../000/00               29 SSE RMY N/A
11/20 58/41/50/+10/..../416/72              43 SSE RMY N/A
11/21 46/35/41/+1/0.00/380/66               20 ENE RMY 21
11/22 45/35/40/+0/..../000/00               26 NW  RMY 28
11/23 40/25/33/-6/0.00/543/95               24 NW  RMY 29
11/24 42/23/33/-6/0.00/564/99               20 WSW RMY 19
11/25 46/31/39/+0/0.00/568/100              18 SSE RMY N/A
11/26 58/37/48/+10/0.00/.../..              33 S   RMY 35
11/27 63/48/54/+18/0.00/.../..              35 SW  RMY 38
11/28 55/38/47/+9/0.19/000/00               23 SW  RMY N/A
 
11/29 low since midnight is 28F; normal low is now 29F 
 
DAILY RECORDS FOR NOVEMBER 2015
 
**11/6 DAILY RECORD MAXIMUM TEMPERATURE OF 71F
       TIES PREVIOUS RECORD OF 71F SET IN 1959

**11/6 DAILY RECORD HIGH MINIMUM TEMPERATURE OF 60F
       BREAKS PREVIOUS RECORD OF 58F SET IN 1938
 
**11/6 DAILY RECORD HIGH MINIMUM TEMPERATURE OF 60F
       TIES PREVIOUS MONTHLY RECORD OF 60F SET ON
       11/8/1996
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR NOVEMBER 29
HIGH 66 IN 2011      
LOW 6 IN 1901
PRECIP 2.69 INCHES IN 1963
SNOWFALL 6.0 INS IN 2012
PEAK GUST 86 SSE IN 1963
 
RECORDS FOR NOVEMBER 30
HIGH 67 IN 2006
LOW 7 IN 1887, 1929
PRECIP 2.42 INCHES IN 1944
SNOWFALL 10.2 INS IN 1945
PEAK GUST 90 SSW IN 1963
 
TODAY'S REPORT PREPARED BY: Robert Skilling