BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, MARCH 10, 2009
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:
 
7 A.M.
Weather: Scattered cirrus
Temperature: 28F, Dew point: 27F, Wind: N at 7 kts
Sea-level pressure: 30.36 inches Hg, rising
Visibility: 12 miles, thin fog
6-hour minimum temperature: 26F
24-hour precip. 0.35 in. 
24-hour snowfall: 2.8 in.
Snow depth on ground: 3 in.
BHO SA 1155 250 SCT 12 282/28/27/3507/036/ DRK K LYR
ALQDS XCPT NE-S THN F TOTAL NEW SNW PST 24 HRS 2.8 INS/
8/001 4/003 51016 MANUAL 70035 ASOS 70038 10028 20026
 
10 A.M.
Weather: Clear, few cumulus, cirrostratus, and cirrus
Temperature: 38F, Dew point: 31F, Wind: N at 2 kts (estimated)
Wind: light and variable
Sea-level pressure: 30.40 inches Hg, rising
Visibility: 10 miles, hazy
BHO SA 1455 CLR 10 295/38/31/E3602/040/ FEW CU FEW CS/CI
K LYR SW-N HZY WND L/V/ 8/105 50013
 
1 P.M.  
Weather: Overcast cirrostratus, few stratocumulus N-NE and E-S, halo
Temperature: 42F, Dew point: 28F, Wind: NW at 4 kts,
Wind: Light and variable
Sea-level pressure: 30.40 inches Hg, falling
Visibility: 25 miles, hazy
6-hour maximum temperature: 42F
BHO SA 1755 E220 OVC 25 293/42/28/3204/040/ FEW SC N-NE AND E-S
K LYR NW-N-E HALO HAZY WND L/V/ 8/507 58002 10042 20028
 
 
WEATHER SUMMARY FOR MONDAY, MARCH 9, 2009
 
TEMPERATURE (DEGREES F)
MAX.....42    NORMAL.....43
MIN.....28    NORMAL.....26
MEAN....35    NORMAL.....34
 
DEPARTURE FROM 30-YEAR NORMAL..................+1
TOTAL DEPARTURE FOR THE MONTH.................-12 [-1.5 DEGREES/DAY] 
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............30  DEPARTURE.........-1
TOTAL HEATING UNITS FOR THE MONTH............301  DEPARTURE........+10
TOTAL HEATING UNITS FOR THE SEASON..........4828  DEPARTURE........-33
TOTAL HEATING UNITS LAST SEASON TO DATE.....4488  DIFFERENCE......+340
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............33 N   AT  1:58 P.M. *
                   AEROVANE.............32 N   AT  1:58 P.M. *
                   ASOS.................36 NNE AT  1:58 P.M.
                   DAVIS................33 ENE AT  9:17 A.M.
FASTEST MILE FOR YESTERDAY..............25 ENE AT  8:49 A.M. *
MAXIMUM 2-MINUTE ASOS AVERAGE...........25 E   AT  8:48 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..........24 ENE AT  8:48 A.M.
                   AVERAGE............14.5 NE 
                   ASOS...............14.5
                   DAVIS..............13.9 ENE [60 DEGREES]
* last of several occurrences
  
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....0.35 DEPARTURE.........+0.20
                         ASOS...............0.36
TOTAL PRECIPITATION FOR THE MONTH...........2.26 DEPARTURE.........+0.91
                         ASOS...............2.14
TOTAL PRECIPITATION FOR THE YEAR............8.79 DEPARTURE.........-1.40
                         ASOS...............9.76 #
# Includes erroneous ASOS precipitation data on 1/1/09, 1/2/09 and 2/27/09.
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........2.8   DEPARTURE.........+2.4
TOTAL SNOWFALL FOR THE MONTH...............13.4   DEPARTURE.........+9.2
TOTAL SNOWFALL FOR THE SEASON..............78.7   DEPARTURE........+29.1
 
PRELIMINARY CLIMATE SUMMARY FOR MARCH 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
 
3/1  28/21/25/-7/0.26/1.9/000/00     38 NNE
3/2  22/15/19/-13/1.16/8.2/000/00    40 NNE    AERO 37 MPH NNE
3/3  25/11/18/-14/0.01/0.1/640/94    33 NW
3/4  30/6/18/-14/0/0/684/100         31 WNW
3/5  39/16/28/-5/0/0/659/96          25 WSW
3/6  49/30/40/+7/T/0/.../..          43 S      AERO 41 MPH S
3/7  60/42/51/+18/0.06/0/.../..      37 S
3/8  57/42/50/+16/0/0/.../..         39 WNW    AERO 40 MPH WNW
3/9  42/28/35/+1/0.72/3.2/000/00     33 N
 
3/10  morning low temp: 26F; our normal low is now 26F
 
NEW DAILY RECORDS FOR MARCH 2009...
3/2: DAILY SNOWFALL 8.2 INS. SURPASSES PREVIOUS
     RECORD OF 7.1 INS. IN 1948
3/7: DAILY MINIMUM 42 TIES RECORD HIGH MINIMUM FOR DATE
     PREVIOUSLY SET IN 1974 AND 1987
3/8: DAILY MINIMUM 42 TIES RECORD HIGH MINIMUM FOR DATE
     PREVIOUSLY SET IN 1995
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR MARCH 10
HIGH 69 IN 1977
LOW 2 IN 1984
PRECIP 2.00 INS. IN 1994
SNOWFALL 4.0 INS. IN 1997
PEAK GUST 80 MPH NW IN 1974
 
RECORDS FOR MARCH 11
HIGH 65 IN 1967
LOW 4 IN 1939, 1960
PRECIP 2.11 INS. IN 1901
SNOWFALL 6.3 INS. IN 1934
PEAK GUST 66e MPH W IN 1980
 
TODAY'S REPORT PREPARED BY: Stephanie Radner