BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, NOVEMBER 10, 2011
ALL TIMES ARE IN EASTERN STANDARD TIME
 
HEAVY FOG DEVELOPED AT THE SUMMIT OVERNIGHT
RAIN BEGAN BY MID-MORNING AND CONTINUED
UNSEASONABLY MILD TEMPERATURES CONTINUE
 
Low clouds enveloped the summit late last night
into early this morning resulting in dense fog.
Rain spread up from the south by mid-morning and
continued into this afternoon. Total of 0.12 inch
of rain through 1 PM.  
 
Today's observations:
 
7 A.M. 
Weather: Obscurement, heavy fog, heavy dew  
Temperature: 56F, Dew point: 56F; Wind: SSE at 9 kts
Sea-level pressure: 29.98 inches Hg, falling
Visibility: 1/16, heavy fog 
6-hour min. temp: 53F
BHO SA 1155 W2 X 1/16F 153/56/56/1509/998/
8//// 56009 10056 20053
 
10 A.M.
Weather: Broken stratocumulus, overcast altocumulus,
few stratus fractus, breaks in overcast SW-N, bright
spots in overcast S-W-N, light rain, rain began 9:45 AM
Temperature: 58F, Dew Point: 57F; Wind: SE at 7 kts,
Wind: Wind gradually backing
Sea-level pressure: 29.94 inches Hg, falling 
Visibility: 6 miles, except 4 miles SE,
light rain and fog
3-hourly precip: trace  
BHO SA 1455 E45 BKN 65 OVC 6R-F 139/58/57/1307/994/
FEW STFRA ALQDS BINOVC SW-N BRGHT SPTS IOVC
HIER AC/CI CLDS VSB SW-N VSBY SE 4
WND GRDL BACKING RB45 PCPN VRY LGT/ 58014
8/771 MANUAL 6000/
 
1 P.M. 
Weather: Overcast stratus fractus, fractus drifting over summit, light rain 
Temperature: 59F, Dew Point: 59F; Wind: ESE at 2 kts, estimated, 
Sea-level pressure: 29.81 inches Hg, falling
Visibility: 3/4 mile, variable 1/4 to 1 mile, north 1/8 mile     
6-hour max. temp: 60F
6-hour rainfall: 0.12 in.
BHO SA 1755 E3 OVC 3/4VR-F 096/59/59/E1202/981/ STFRA DRFTG OVR/
BLO SMT VSBY 1/8V1 N 1/8 CDNS VRBL WND LGT/ 8/7// 58043
MANUAL 6012/ ASOS 60011 10060 20056
 
WEATHER SUMMARY FOR WEDNESDAY, NOVEMBER 9
 
TEMPERATURE (DEGREES F)
MAX.....68    NORMAL.....52
MIN.....50    NORMAL.....36
MEAN....59    NORMAL.....44
 
DEPARTURE FROM 30-YEAR NORMAL....................+15
TOTAL DEPARTURE FOR THE MONTH....................+23  [+2.4 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY..............6   DEPARTURE........-15
TOTAL HEATING UNITS FOR THE MONTH............153   DEPARTURE........-25
TOTAL HEATING UNITS FOR THE SEASON...........579   DEPARTURE.......-190
TOTAL HEATING UNITS LAST SEASON TO DATE......679   DIFFERENCE......-100
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..............22  S   AT  8:46 P.M. 
                   AERO...................23  S   AT  8:46 P.M. *
                   ASOS...................24  S   AT  8:46 P.M.
                   DAVIS..................23  S   AT  8:40 P.M.
THE FASTEST MILE FOR YESTERDAY............17  S   AT  9:14 P.M. *  
MAXIMUM 2-MINUTE ASOS AVERAGE.............17  S   AT  9:14 P.M. 
MAXIMUM 2-MINUTE DAVIS AVERAGE............17  S   AT 12:45 P.M.
AVERAGE WIND SPEED AND DIRECTION........11.0 S
                   ASOS.................11.1
                   DAVIS................10.3 S [190 deg]
* last of several occurrences....
 
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  ........0.00 DEPARTURE..........-1.36
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE YEAR..........54.02 DEPARTURE.........+10.64
                        ASOS..............54.45**
**ASOS data is in error due to system failure on 1/12-13/11
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.........-0.1
TOTAL SNOWFALL FOR NOVEMER..................0.0  DEPARTURE.........-0.6
TOTAL SNOWFALL FOR THE SEASON...............8.5  DEPARTURE.........+7.7
 
PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 2011 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane wind recording system gust when significant
RMY:  R.M. Young wind gust recording system added 8/9/2011
TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized
 
11/1  50/38/44/-3/0.00/0.0/286/46   25 ENE AERO 24 MPH ENE RMY 24
11/2  54/34/44/-2/0.00/0.0/619/100  17 S   AERO 16 MPH S   RMY N/A
11/3  60/40/50/+4/0.00/0.0/437/71   27 WSW AERO 30 MPH WSW RMY 28
11/4  49/33/41/-5/0.00/0.0/343/56   33 NW  AERO 35 MPH NNW RMY 36
11/5  47/29/38/-7/0.00/0.0/556/91   18 NW  AERO 21 MPH NNW RMY 21
11/6  56/35/46/+1/0.00/0.0/603/99   24 SSW AERO 24 MPH SSW RMY 26
11/7  62/39/51/+6/0.00/0.0/600/99   23 WSW AERO 24 MPH SW  RMY 25
11/8  68/49/59/+15/0.00/580/96      20 W   AERO 21 MPH W   RMY N/A
11/9  68/50/59/+15/0.00/584/97      22 S   AERO 23 MPH S   RMY 23
 
11/10 our morning low temp: 53F; the normal low is now 36F
 
DAILY RECORDS FOR NOVEMBER 2011
None so far...
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR NOVEMBER 10
HIGH 75 IN 1931
LOW 20 IN 2004
PRECIP 2.11 INCHES IN 1888
SNOWFALL 2.2 IN 1987
PEAK GUST 83e S IN 1942
 
RECORDS FOR NOVEMBER 11
HIGH 68 IN 1984
LOW 17 IN 1956
PRECIP 1.14 INCHES IN 1991
SNOWFALL 2.5 IN 1986
PEAK GUST 64 NW IN 1962
 
TODAY'S REPORT PREPARED BY: Robert Skilling