BLUE HILL OBSERVATORY MILTON, MA
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, NOVEMBER 7, 2010
ALL TIMES ARE IN EASTERN STANDARD TIME
 
TEMPS COOL AS COLD FRONT APPROACHES...
 
Conditions have been somewhat cool and brisk
today as a cold front slowly approaches the Blue Hills
region from the south. After an overnight low of 35F,
a persistent layer of altocumulus has prevented any kind of
radiational heating through the early afternoon. As
a result, the air temperature has remained mostly in the upper
30s with wind chills closer to 30F due to a steady northwest
wind averaging 12-15 MPH. Visibilities are still high, ranging
between 50 and 80 miles. The air pressure has begun falling
rapidly during the last hour.
 
Today's observations: 
 
7 A.M.
Weather: Broken altocumulus, broken stratocumulus, line
of stratocumulus NNE-SE, few lower cumulus ENE
Temperature: 35F, Dew point: 30F; Wind: NNW at 10 kts
Wind: Direction variable WNW to N
Sea-level pressure: 30.26 inches Hg, rising
Visibility: 65 miles
6-hour minimum temp: 35F
BHO SA 1155 E30 BKN 120 BKN 65 246/35/30/3310/026/ LINE
SC NNE-SE FEW LWR CU ENE WND 29V36/ 8/530 51007 10038 20035
 
10 A.M.
Weather: Thin overcast altocumulus, broken altocumulus,
line of stratocumulus distant NE-SE, thin spots in overcast
SE and SW, sun dimly visible
Temperature: 38F, Dew point: 31F; Wind: NW at 11 kts,
Wind: Direction variable W to N
Sea-level pressure: 30.20 inches Hg, falling
Visibility: 55 miles, 35 miles NE-SE
BHO SA 1455 E150 BKN 170 OVC 55 228/38/31/3211/020/
LINE SC DSNT NE-SE THN SPTS INOVC SE & SW SUN DMLY VSBL
VSBY NE-SE 35 WND 28V36/ 8/83/ 58018
 
1 P.M. 
Weather: Overcast dense cirrus, broken altocumulus,
line of stratocumulus/altocumulus distant ENE-ESE,
few small cumulus ENE-SE, pressure falling rapidly
Temperature: 39F, Dew point: 31F; Wind: WNW at 15G21 kts,
Wind: Direction variable W to N
Sea-level pressure: 30.10 inches Hg, falling rapidly
Visibility: 80 miles, 30 miles E-SE
6-hourly max. temp: 40F
BHO SA 1755 E160 BKN 200 OVC 80 192/39/31/3015G21/010/ LINE
AC DSNT ENE-ESE FEW SML CU ENE-SE VSBY E-SE 30 WND 28V35 PRESFR
30/ 8/832 58036 10040 20035
 
WEATHER SUMMARY FOR SATURDAY, NOVEMBER 6
 
TEMPERATURE (DEGREES F)
MAX.....48     NORMAL.....53
MIN.....38     NORMAL.....37
MEAN....43     NORMAL.....45
DEPARTURE FROM 30-YEAR NORMAL...............-2
TOTAL DEPARTURE FOR THE MONTH..............-16 [-2.9 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY............22    DEPARTURE........+2
TOTAL HEATING UNITS FOR THE MONTH...........131    DEPARTURE.......+15
TOTAL HEATING UNITS FOR THE SEASON..........608    DEPARTURE.......-99
TOTAL HEATING UNITS LAST SEASON TO DATE.....745    DIFFERENCE.....-137
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............20 N   AT   4:11 P.M. * 
                   AEROVANE..............21 NNW AT  10:11 P.M. * 
                   ASOS..................20 NNW AT  10:11 P.M.  
                   DAVIS.................23 N   AT   3:45 P.M.  
THE FASTEST MILE FOR YESTERDAY...........16 NNW AT  10:07 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE............15 NNW AT  10:10 P.M.  
MAXIMUM 2-MINUTE DAVIS AVERAGE...........15 WNW AT   1:15 P.M.  
AVERAGE WIND SPEED AND DIRECTION........9.5 N
                   ASOS.................8.4 
                   DAVIS................8.7 NW [306 DEG]
* Last of several occurrences.
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE........-0.15
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........1.42  DEPARTURE........+0.52
                         ASOS..............1.48
TOTAL PRECIPITATION FOR THE YEAR..........55.14  DEPARTURE.......+12.22
                         ASOS.............55.03**
** ASOS missing rainfall due to system failure on 6/24-25
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.....-0.1
TOTAL SNOWFALL FOR THE MONTH................0.0  DEPARTURE.....-0.3
TOTAL SNOWFALL FOR THE SEASON.............TRACE  DEPARTURE.....-0.5
 
PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 2010 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane wind recording system gust when significant
TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized
 
11/1  49/29/39/-8/0.00/.../..   24 WNW
11/2  46/33/40/-6/0.00/.../..   21 NW
11/3  50/28/39/-7/0.00/.../..   20 SSE
11/4  54/37/46/0/.../0/0        43 NNE  AERO 45 MPH NE
11/5  59/44/52/+7/.../.../..    36 S    AERO 39 MPH S
11/6  48/38/43/-2/.../.../..    20 N
 
11/7 morning low temp: 35F; the normal low is now 37F
 
NEW DAILY RECORDS FOR NOVEMBER 2010
None so far
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR NOVEMBER 7
HIGH 75 IN 1938
LOW 21 IN 1930
PRECIP 2.02 INCHES IN 1953
SNOWFALL 1.0 IN 1967
PEAK GUST 69e ENE IN 1953
 
RECORDS FOR NOVEMBER 8
HIGH 72 IN 1938
LOW 20 IN 1921
PRECIP 2.24 INCHES IN 1972
SNOWFALL 4.0 IN 1894
PEAK GUST 72e SE IN 1947
 
TODAY'S REPORT PREPARED BY: Eli Melaas