BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, JANUARY 8, 2009
ALL TIMES ARE IN EASTERN STANDARD TIME
 
7 A.M.
Weather: Clear, distant stratocumulus all quadrants,
few lower cumulus fractus, few altocumulus NW-N
Temperature: 32F, Dew point: 26F, Wind: SSW at 22G39 kts,
Wind: Peak gust past hour 30 kts SW at 6:50 A.M.
Wind: Direction variability SSE-WSW
Sea-level pressure: 29.22 inches Hg, rising
Visibility: 25 miles
6-hour minimum temperature: 26F
24-hourly precip: 0.87 in.
24-hourly snowfall: 0.4 in. 
Snow depth on ground: 3 inches
BHO SA 1155 CLR 25 896/32/26/2122G39/922/ DSNT SC ALQDS
FEW LWR CUFRA FEW AC NW-N TOTAL NEW SNW PST 24 HRS 0.4 IN
PK WND 2230/50 WND 15V25/ 8/530 4/003 53039
MANUAL 70087 ASOS 70088 10032 20026
 
10 A.M.
Weather: Broken stratocumulus
Temperature: 35F, Dew point: 23F, Wind: SSW at 20G31 kts
Wind: Peak gust past hour 33 kts SSW at 9:26 A.M.
Wind: Direction variability SSE-W
Sea-level pressure: 29.31 inches Hg, rising
Visibility: 30 miles
BHO SA 1455 E35 BKN 30 925/35/23/2120G31/931/
PK WND 2133/26/ WND 16V26/ 8/500 51029
 
1 P.M.
Weather: Broken cumulus, stratocumulus
Temperature: 37F, Dew point: 23F, Wind: SW at 19G33 kts
Wind: Peak gust past hour 39 kts SW at 12:31 P.M.
Wind: Direction variability SSE-W
Sea-level pressure: 29.28 inches Hg, falling
Visibility: 25 miles
6-hour maximum temperature: 38F
BHO SA 1755 E40 BKN 50 BKN 25 916/37/23/232119G33/928/
PK WND 2239/31 WND 16V26/ 8/800 58009 10038 20032
 
 
WEATHER SUMMARY FOR WEDNESDAY, JANUARY 7
 
TEMPERATURE (DEGREES F)
MAX.....36    NORMAL.....34 
MIN.....26    NORMAL.....18
MEAN....31    NORMAL.....26
 
DEPARTURE FROM 30-YEAR NORMAL...............+5
TOTAL DEPARTURE FOR THE MONTH..............-15  [-2.3 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............34  DEPARTURE.........-5
TOTAL HEATING UNITS FOR THE MONTH............283  DEPARTURE........+16
TOTAL HEATING UNITS FOR THE SEASON..........2523  DEPARTURE........-73
TOTAL HEATING UNITS LAST SEASON TO DATE.....2429  DIFFERENCE.......+94
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............46  NE  AT  4:32 P.M.   
                   AEROVANE.............45  NE  AT  4:29 P.M.
                   ASOS.................48  E   AT  4:37 P.M.    
                   DAVIS................46  NE  AT  4:32 P.M.      
FASTEST MILE FOR YESTERDAY..............39  NE  AT  4:29 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE...........36  NE  AT  4:43 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..........37  NE  AT  4:32 P.M.      
                   AVERAGE............13.0  E
                   ASOS...............13.5
                   DAVIS..............12.5  NE [43 deg]  
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....0.87  DEPARTURE.........+0.72
                         ASOS...............0.88
TOTAL PRECIPITATION FOR JANUARY.............1.33  DEPARTURE.........+0.28
                         ASOS...............2.32 #
TOTAL PRECIPITATION FOR THE YEAR (2009).....1.33  DEPARTURE.........+0.28
                         ASOS...............2.32 #
# Includes erroneous ASOS precipitation data on 1/1/09 and 1/2/09
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.4   DEPARTURE.........-0.1
TOTAL SNOWFALL FOR JANUARY..................0.9   DEPARTURE.........-2.6
TOTAL SNOWFALL FOR THE SEASON..............31.3   DEPARTURE........+14.2
 
PRELIMINARY CLIMATE SUMMARY FOR JANUARY 2009 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane recording wind system gust when significant
   TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized
 
1/1 16/1/9/-18/0/0/538/98          44 WNW   Aero 44 MPH WNW
1/2 32/9/21/-6/0/0/005/01          28 S
1/3 32/21/27/0/T/T/539/98          43 WNW   Aero 44 MPH WNW
1/4 35/17/26/-1/0/0/512/93         36 W     Aero 33 MPH W
1/5 36/26/31/+4/0.06/0/512/93      30 W   
1/6 33/21/27/+1/0/0/183/33         27 W 
1/7 36/26/31/+5/1.27/0.9/000/00    46 NE 
          
1/8 morning low temp: 26F; our normal low is now 18F
 
NEW DAILY RECORDS FOR JANUARY 2009...
 
..NONE..
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR JANUARY 8
HIGH 65F IN 2008
LOW -8F IN 1968
PRECIP 1.70 INS. IN 1958, 1979
SNOWFALL 12.5 INS. IN 1996
PEAK GUST 77 MPH NNW IN 1958
 
RECORDS FOR JANUARY 9
HIGH 62F IN 1937
LOW -9F IN 1968
PRECIP 3.00 INS. IN 1956
SNOWFALL 10.0 INS. IN 1904
PEAK GUST 101e MPH SE IN 1978 [RECORD FOR MONTH]
 
TODAY'S REPORT PREPARED By: Stephanie Radner