BLUE HILL OBSERVATORY MILTON, MA
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, OCTOBER 27, 2010
ALL TIMES ARE IN EASTERN STANDARD TIME
 
NEW RECORD HIGH MINIMUM TEMPERATURE FOR OCTOBER 26TH....
ALSO NEW LATE SEASON RECORD SET
 
Yesterday's minimum temperature of 62F which occurred both
in the early morning and again last evening surpassed the
record high minimum for the date of 57F set in 1991.
The maximum temperature of 77F fell short of the record
of 80F for October 26 set in 1963.  The departure from
normal for the mean temperature for the day was a +22 
the most since +25 degrees on April 7 this year. 
 
In addition the minimum of 62F on October 26 surpasses the
previous late season record of 62F set on October 22, 1979.
Also, the last time a warmer minimum temperature was recorded
was on October 19 with 63F in 1928 and 2007. 
 
The warmest minimum temperature during the month of
November is 60F on November 8, 1996.
 
The low temperature this morning was 63F. The record high
high minimum for October 27 is 59F in 1963.
 
Today's observations: 
 
7 A.M.
Weather: Partial obscurement with fog, overcast stratus 
fractus drifting over summit, light rain occurring
Temperature: 65F, Dew point: 65F; Wind: S at 20G26 kts.
Wind: Peak wind gust 26 kts S at 6:53 a.m. 
Sea-level pressure: 29.92 inches Hg, rising
Visibility: 1/2 mile, variable 1/8 to 3/4 mile,
N-E 1/8 mile, SSE-SW-NW 1.5 miles 
6-hour minimum temp: 63F
24-hour rainfall: 0.06 inch
BHO SA 1155 -X E3 OVC 1/2VR-F 133/65/65/1820G26/992/ F7 STRA 
DRFTG OVR SMT CDNS VRBL VSBY 1/8V3/4 N-E 1/8 SSE-SW-NW 11/2/ 
PK WND 1826/53/ 8/7// 53004 ASOS 60004 MANUAL 6006/ ASOS 70004 
MANUAL 70005 10065 20063
 
10 A.M.
Weather: Overcast stratus, thin fog 
Temperature: 67F, Dew point: 66F; Wind: S at 18G27 kts,
Wind: Peak wind 30 kts S at 9:41 a.m.
Sea-level pressure: 29.92 inches Hg, falling
Visibility: 4 miles in thin fog
BHO SA 1455 E4 OVC 4F 131/67/66/1718G27/992/
STRA DRFTG OVR/BLO SMT SUN OCNL DMLY VSB VSBY NE 11/2
W 6 PK WND 1830/41/ 8/6// 58002 MANUAL 6005/ ASOS 60006   
 
1 P.M. 
Weather: Overcast stratus, stratus drifting over the
summit, visibility lowering, thin fog
Temperature: 66F, Dew point: 66F; Wind: S at 19G29 kts,
Wind: Peak wind SSE at 29 kts at 12:45 p.m.
Sea-level pressure: 29.87 inches Hg, falling  
Visibility: 3 miles thin fog and lowering
6-hour maximum temp: 68F
BHO SA 1755 E3 OVC 3F 114/66/66/1719G29/987/ VSBY LWRG ALQDS 
PK WND 1629/45/ 8/6// 58017 MANUAL 6005/ ASOS 60006 10068 20065

 
WEATHER SUMMARY FOR TUESDAY, OCTOBER 26
 
TEMPERATURE (DEGREES F)
MAX.....77     NORMAL.....57
MIN.....62     NORMAL.....40
MEAN....70     NORMAL.....48
 
DEPARTURE FROM 30-YEAR NORMAL..............+22
TOTAL DEPARTURE FOR THE MONTH...............-3 [-0.3 DEGREE/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............0    DEPARTURE.......-17
TOTAL HEATING UNITS FOR THE MONTH...........338    DEPARTURE........+4
TOTAL HEATING UNITS FOR THE SEASON..........417    DEPARTURE.......-86
TOTAL HEATING UNITS LAST SEASON TO DATE.....541    DIFFERENCE.....-124
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............32 S   AT   1:18 A.M.  
                   AEROVANE..............36 S   AT   1:18 A.M.  
                   ASOS..................33 S   AT   1:18 A.M.  
                   DAVIS.................35 SSW AT   1-2  A.M.  
THE FASTEST MILE FOR YESTERDAY...........24 S   AT   1:18 A.M.  
MAXIMUM 2-MINUTE ASOS AVERAGE............24 S   AT   1:19 A.M.   
MAXIMUM 2-MINUTE DAVIS AVERAGE...........26 SSW AT   1-2  A.M.  
AVERAGE WIND SPEED AND DIRECTION........14.1 SSW
                   ASOS................ 13.6
                   DAVIS................13.2 S [190 DEG]
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.06  DEPARTURE........-0.09
                         ASOS..............0.04
TOTAL PRECIPITATION FOR THE MONTH..........5.65  DEPARTURE........+1.98
                         ASOS..............5.65
TOTAL PRECIPITATION FOR THE YEAR..........53.67  DEPARTURE.......+12.40
                         ASOS.............53.49**
** ASOS missing rainfall due to system failure on 6/24-25
 
PRELIMINARY CLIMATE SUMMARY FOR OCTOBER 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
 
10/1  80/55/68/+11/0.56/035/05  55 SSE  AERO 63 MPH SSE
10/2  65/46/56/0/0.00/688/98    28 WNW  AERO 31 MPH WNW
10/3  55/43/49/-7/T/133/19      35 NNE  AERO 39 MPH NNE
10/4  54/48/51/-5/0.78/000/00   39 NNE  AERO 43 MPH NNE
10/5  57/51/54/-1/0.40/000/00   37 NE   AERO 39 MPH NNE
10/6  57/49/53/-2/1.63/000/00   47 NE   AERO 51 MPH NE
10/7  62/47/55/0/0.00/275/40    37 W    AERO 40 MPH W
10/8  70/47/59/+5/0.00/610/89   35 WSW  AERO 37 MPH WSW
10/9  62/43/53/-1/0.00/675/99   33 WNW  AERO 37 MPH WNW
10/10 64/38/51/-3/0.00/679/100  25 SW   AERO 29 MPH SSW
10/11 68/47/58/+5/0.00/542/80   28 W   
10/12 61/43/52/-1/0.01/297/44   24 ENE
10/13 61/38/50/-2/0.00/663/99   18 NW
10/14 59/45/52/0/0.41/294/44    29 ENE
10/15 51/39/45/-7/1.71/033/05   48 WSW  AERO 50 MPH WSW TSTM 
10/16 55/39/47/-4/0.00/544/82   47 WNW  AERO 54 MPH WNW
10/17 63/38/51/0/0.00/581/88    43 W    AERO 47 MPH W
10/18 57/41/49/-2/0.00/519/79   32 W    AERO 35 MPH W
10/19 57/38/48/-3/0.00/497/76   21 W 
10/20 61/44/53/+3/T/.../..      21 S
10/21 56/39/48/-2/0.07/.../..   55 W    AERO 62 MPH W
10/22 47/34/41/-9/T/T/.../..    51 W    AERO 56 MPH W trace snow
10/23 56/35/46/-3/0.00/.../..   32 W    AERO 37 MPH W
10/24 51/39/45/-4/0.01/013/02   17 SSE
10/25 65/47/56/+7/T/.../..      36 S    AERO 38 MPH S
10/26 77/62/70/+22/0.00/.../..  32 S    AERO 36 MPH S
 
10/27 our morning low temp: 63F; the normal low is now 40F
 
NEW DAILY RECORDS FOR OCTOBER 2010
10/22: Daily snowfall: Trace; equals record set in 1969.
10/26: NEW RECORD HIGH MINIMUM TEMP. OF 62F;
the previous record was 57F in 1991
10/26: NEW LATE SEASON RECORD HIGH MINIMUM TEMP. 62F;
the previous record was 62F on 10/22/1979
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR OCTOBER 27
HIGH 83 IN 1963
LOW 21 IN 1936
PRE 1.79 INCHES IN 1886
SNOW 0.1 INCHES IN 1957
WIND 54 MPH WNW IN 1968
 
RECORDS FOR OCTOBER 28
HIGH 81 IN 1919
LOW 23 IN 1914
PRECIP 2.46 INCHES IN 2006
SNOWFALL TRACE IN 1934,1957,1979
PEAK GUST 71 MPH SSW IN 1995
 
TODAY'S REPORT PREPARED BY: Robert Skilling