BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, MARCH 4, 2010  
ALL TIMES ARE IN EASTERN STANDARD TIME 
 
Today's observations:
 
7 A.M.
Weather: Scattered stratus, overcast stratocumulus
Temperature: 31F, Dew point: 27F, Wind: NNW at 12G20 kts,
Wind: Direction variable WNW to NNE
Sea-level pressure: 29.55 inches Hg, rising
Visibility: 75 miles
6-hour minimum temp: 30F
24 hour precip: 0.18 in.
24-hour snowfall: 1.6 in. 
Average snow depth: 1 inch
BHO SA 1155 25 SCT E40 OVC 75 007/31/27/3312G20/955/ 
TOTAL NEW SNW PST 24 HRS 1.6 INS WND 29V02/ 8/5// 4/001 51008 
MANUAL 600X/ ASOS 60002 MANUAL 70018 ASOS 70016 10032 20030
 
10 A.M. 
Weather: Overcast stratus, light snow and fog
Temperature: 31F, Dew point: 31F, Wind: NNW at 10G22 kts,
Wind: Direction variable WNW to NNE
Sea-level pressure: 29.61 inches Hg, rising
Visibility: 2 miles, light snow and fog 
3-hourly snowfall: 0.2 inch
BHO SA 1455 E30 OVC 2S-F 026/31/31/3410G22/961/ 
TOTAL NEW SNW PST 3 HRS 0.2 IN WND 29V03/ 8/7// 53019 
MANUAL 600X/ ASOS 60001

1 P.M.
Weather: Overcast stratus, light snow and fog
Temperature: 33F, Dew point: 31F, Wind: NNW at 13G19 kts,
Wind: Direction variabile W to N
Sea-level pressure: 29.62 inches Hg, rising
Visibility: 3 miles, light snow and fog
6-hourly maximum temp: 33F
6-hourly precip: 0.04 inch
6-hourly snowfall: 0.6 inch
BHO SA 1755 E10 OVC 3S-F 031/33/31/3313G19/962/ 
TOTAL NEW SNW PST 6 HRS 0.6 IN WND 26V36/ 8/7// 51005 
MANUAL 6004/ ASOS 60005 10033 20031
 
WEATHER SUMMARY FOR WEDNESDAY, MARCH 3
 
TEMPERATURE (DEGREES F)
MAX.....34     NORMAL.....41
MIN.....31     NORMAL.....24
MEAN....33     NORMAL.....32
 
DEPARTURE FROM 30-YEAR AVERAGE..............+1
TOTAL DEPARTURE FOR THE MONTH..............+13 [+4.1 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY............32    DEPARTURE........-1
TOTAL HEATING UNITS FOR THE MONTH........... 86    DEPARTURE.......-14
TOTAL HEATING UNITS FOR THE SEASON.........4486    DEPARTURE......-184
TOTAL HEATING UNITS LAST SEASON TO DATE....4660    DIFFERENCE.....-174
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............45 NNE AT  1:30 P.M. 
                   AEROVANE..............43 NNE AT  1:30 P.M. 
                   ASOS..................46 NE  AT  1:31 P.M.       
                   DAVIS.................46 N   AT  1:30 P.M.        
THE FASTEST MILE FOR YESTERDAY...........29 NNE AT  1:30 P.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE............28 NE  AT  1:32 P.M.         
MAXIMUM 2-MINUTE DAVIS AVERAGE...........28 N   AT  3:48 P.M.        
AVERAGE WIND SPEED AND DIRECTION.........16.1 N
                   ASOS..................15.0
                   DAVIS.................15.0 NNE [014 DEG]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.18   DEPARTURE....+0.03
                         ASOS..............0.16
TOTAL PRECIPITATION FOR THE MONTH .........0.58   DEPARTURE....+0.13
                         ASOS..............0.52 
TOTAL PRECIPITATION FOR THE YEAR ..........9.68   DEPARTURE....+0.39
                         ASOS..............9.64
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........1.6  DEPARTURE......+1.1
TOTAL SNOWFALL FOR THE MONTH............... 5.0  DEPARTURE......+3.5
TOTAL SNOWFALL FOR THE SEASON THRU FEB.....61.5  DEPARTURE.....+14.6
 
PRELIMINARY CLIMATE SUMMARY FOR MARCH 2010 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
TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized
 
3/1  44/33/38/+6/0.38/3.2/047/07    43 NW    AERO 42 MPH NW                                                     
3/2  43/32/38/+6/0/0/.../..         22 NNE
3/3  34/31/33/+1/.../../000/00      45 NNE
 
3/4  our morning low temp: 30F; the normal low is now 24F
 
NEW DAILY RECORDS FOR MARCH 2010
None.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR MARCH 4
HIGH 69 IN 1974
LOW -5 IN 1950
PRECIP 1.80 IN 1960
SNOWFALL 17.3 IN 1960
PEAK GUST 81e MPH SSW IN 1971
 
RECORDS FOR MARCH 5
HIGH 64 IN 1979
LOW -2 IN 1948
PRECIP 1.76 INS. IN 2001
SNOWFALL 13.0 INS. IN 1891
PEAK GUST 76e MPH WNW IN 1971

TODAY'S REPORT PREPARED BY: Stephanie Radner