BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, NOVEMBER 23, 2009
ALL TIMES ARE IN EASTERN STANDARD TIME
 
LOW CLOUDS AND COLD GUSTY NE WINDS
 
A low overcast of stratocumulus and stratus
clouds has prevented any sunshine today. A
little light drizzle was observed early this
afternoon.  Gusty northeast winds have reached
close to 30 MPH and a peak gust of 33 MPH
was recorded just before noon.
 
Today's observations:
 
7 A.M.
Weather: Overcast stratocumulus strataformis, break in 
overcast along the horizon distant ESE-S
Temperature: 45F, Dew point: 38F, Wind: NE at 12 kts
Sea-level pressure: 30.50 inches Hg, rising
Visibility: 25 miles, hazy
6-hour minimum temp: 42F
24-hour precipitation: 0.00
BHO SA 1155 E27 OVC 25 328/45/38/0412/050/
BINOVC ALG HRZN DSNT ESE-S/ 8/5// 53004 10045 20042
 
10 A.M.
Weather: Broken stratocumulus, overcast stratocumulus
Temperature: 46F, Dew point: 40F, Wind: NE at 11 kts,
Wind: Direction variable NNE-E, gust to 22 kts past hour
Sea-level pressure: 30.51 inches Hg, falling
Visibility: 20 miles, 30 miles northeast, hazy
BHO SA 1455 E18 BKN 28 OVC 20 331/46/40/0511/051/
VSBY NE 30 HAZY ALQDS WND GRDLY VEERING WND 02V09
GST 22 KTS PST HR /5// 50003
 
1 P.M.  
Weather: Overcast stratus, stratocumulus, very light
drizzle began 12:45 p.m.  
Temperature: 46F, Dew point: 42F, Wind: NE at 14G25 kts,
Wind: Direction variable N to ENE
Sea-level pressure: 30.49 inches Hg, falling
Visibility: 15 miles, SE-S 8 miles
6-hour max. temp: 47F
6-hour precip: trace
BHO SA 1755 E15 BKN 25 OVC 15L- 324/46/42/0414G25/049/
VSBY SE-S 8 WND 36V07 LB45 PCPN VRY LGT/ 8/500 56017
MANUAL 6000/ 10047 20045
 
WEATHER SUMMARY FOR SUNDAY, NOVEMBER 22
 
TEMPERATURE (DEGREES F)
MAX.....49     NORMAL.....47
MIN.....38     NORMAL.....32
MEAN....44     NORMAL.....40
 
DEPARTURE FROM 30-YEAR AVERAGE.............+4
TOTAL DEPARTURE FOR THE MONTH............+103 [+4.5 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY............21    DEPARTURE........-4
TOTAL HEATING UNITS FOR THE MONTH...........377    DEPARTURE......-104
TOTAL HEATING UNITS FOR THE SEASON..........998    DEPARTURE.......-74
TOTAL HEATING UNITS LAST SEASON TO DATE....1016    DIFFERENCE......-18
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............28 ENE  AT  11:11 P.M.
                   AEROVANE..............24 ENE  AT  11:11 P.M.
                   ASOS..................26 ENE  AT  11:11 P.M.
                   DAVIS.................27 NE   AT  11:10 P.M. 
FASTEST MILE FOR YESTERDAY...............20 NE   AT  11.17 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE............20 ENE  AT  11:16 P.M.       
MAXIMUM 2-MINUTE DAVIS AVERAGE...........20 ENE  AT  11:11 P.M.       
AVERAGE WIND SPEED AND DIRECTION.......11.3 NE 
                   ASOS................10.8
                   DAVIS...............10.9 NNE [020 DEG]
 
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..........2.77   DEPARTURE....-0.67
                         ASOS..............2.84
TOTAL PRECIPITATION FOR THE YEAR..........47.88   DEPARTURE....+2.42
                         ASOS.............49.15
                 
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.....-1.9
TOTAL SNOWFALL FOR THE SEASON...............3.0  DEPARTURE.....+0.9
                                               
PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 2009 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  58/44/51/+4/0.05/167/27   22 WNW  
11/2  49/42/46/0/T/099/16       29 NE
11/3  57/36/47/+1/0/474/77      32 W    AERO 32 MPH W    
11/4  49/34/42/-4/0/514/84      24 W
11/5  46/36/41/-4/0.01/006/01   21 N
11/6  47/31/39/-6/0/419/69      38 WNW  AERO 38 MPH WNW
11/7  49/29/39/-6/0/575/95      33 S
11/8  66/42/54/+10/0/549/91     31 SSW
11/9  68/49/59/+15/0/486/81     35 S    AERO 35 MPH S
11/10 62/50/56/+12/0/000/00     23 SW 
11/11 50/43/47/+4/0/113/19      31 NNE
11/12 49/41/45/+2/0/125/21      34 NE   AERO 31 MPH NNE
11/13 49/44/47/+4/0/000/00      39 NNE  AERO 37 MPH NNE
11/14 59/49/54/+12/2.08/000/00  39 NE   AERO 38 MPH NE
11/15 60/52/56/+14/0.06/012/02  18 W
11/16 56/43/50/+8/0/527/90      30 NW   AERO 31 MPH NW
11/17 47/35/41/0/0/576/99       28 WNW
11/18 49/34/42/+1/0/.../..      15 SSW
11/19 59/41/50/+9/0/.../..      30 SE
11/20 65/44/55/+15/0.57/.../..  40 W    AERO 41 MPH W
11/21 55/41/48/+8/0/.../..      25 SW 
11/22 49/38/44/+4/0/.../..      28 ENE 
 
11/23 our morning low temp: 42F; the normal low is now 32F
 
NEW DAILY RECORD FOR NOVEMBER 2009
11/14: NEW RECORD DAILY RAINFALL 2.08 INCHES;
      surpasses previous 1.87 inches in 1972.  
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR NOVEMBER 23
HIGH 73 IN 1931
LOW 9 IN 1888
PRECIP 2.33 INS IN 2006
SNOWFALL 5.5 INS IN 1989
PEAK GUST 64e S IN 1953
 
RECORDS FOR NOVEMBER 24
HIGH 69 IN 1931
LOW 7 IN 1897
PRECIP 1.76 INCHES IN 1901
SNOWFALL 4.5 INS IN 1936
PEAK GUST 69 SSW IN 1959
 
TODAY'S REPORT PREPARED BY: Robert Skilling