BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, MARCH 22, 2009
ALL TIMES ARE IN EASTERN STANDARD TIME 
 
Today's observations:
 
7 A.M.
Weather: Overcast
Temperature: 31F, Dew point: 23F, Wind: WNW at 9 kt
Sea-level pressure: 30.30 inches Hg, falling
Visibility: 40 miles
6-hour minimum temperature: 29F
24-hour precipitation: 0 inches
BHO SA 1155 70 SCT 120 OVC 40 260/31/23/2909/030/
VIRGA W-N FEW BINOVC SE/ 8/57/ 56006 10031 20029
 
10 A.M.
Weather: Overcast
Temperature: 39F, Dew point: 20F, Wind: Light and Variable
Sea-level pressure: 30.26 inches Hg, falling
Visibility: 30 miles, hazy
BHO SA 1455 50 SCT 100 OVC 30 247/39/20/2406/026/
FEW BINOVC ALQDS VIRGA SE VSBY E-SE 15 HAZY WND L/V/ 8/57 58013
 
1 P.M.  
Weather: Overcast
Temperature: 48F, Dew point: 23F, Wind: WSW at 14G20 kt
Sea-level pressure: 30.16 inches Hg, falling
Visibility: 35 miles
6-hour maximum temperature: F 
BHO SA 1755 50 OVC 35 214/48/23/2514G20/016/
FEW BINOVC ALQDS WND 21V30/ 8/4// 58033 10049 20031
 
 
WEATHER SUMMARY FOR SATURDAY, MARCH 21, 2009
 
TEMPERATURE (DEGREES F)
MAX.....43    NORMAL.....46
MIN.....23    NORMAL.....29
MEAN....33    NORMAL.....38
 
DEPARTURE FROM 30-YEAR NORMAL..................-5
TOTAL DEPARTURE FOR THE MONTH..................-1  [-0.2 DEGREES/DAY] 
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............32  DEPARTURE.........+5
TOTAL HEATING UNITS FOR THE MONTH............636  DEPARTURE.........-3
TOTAL HEATING UNITS FOR THE SEASON..........5163  DEPARTURE........-46
TOTAL HEATING UNITS LAST SEASON TO DATE.....4849  DIFFERENCE......+314
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............21 S   AT 8:15 P.M.
                   AEROVANE.............23 S   AT 8:13 P.M.
                   ASOS.................22 S   AT 9:20 P.M.
                   DAVIS................23 SSE AT 8:11 P.M.
FASTEST MILE FOR YESTERDAY..............18 S   AT 8:12 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE...........16 S   AT 9:22 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..........18 ESE AT 6:56 P.M.
                   AVERAGE.............9.2 NW
                   ASOS................8.7
                   DAVIS...............8.6 NNE [19 DEGREES]
* last of several occurrences
 
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...........2.45 DEPARTURE.........-0.78
                         ASOS...............2.39
TOTAL PRECIPITATION FOR THE YEAR............8.98 DEPARTURE.........-3.09
                         ASOS..............10.01 #
# 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..........0.0   DEPARTURE.........-0.3
TOTAL SNOWFALL FOR THE MONTH...............13.4   DEPARTURE.........+4.5
TOTAL SNOWFALL FOR THE SEASON..............78.7   DEPARTURE........+24.4
 
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/-13/1.21/8.2/000/00    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/0/152/22          43 S      AERO 41 MPH S
3/7  60/42/51/+18/0.06/0/429/62      37 S
3/8  57/42/50/+16/0/0/445/64         39 WNW    AERO 40 MPH WNW
3/9  42/28/35/+1/0.72/3.2/000/00     33 N
3/10 42/26/34/0/0.02/0/470/67        23 SSE
3/11 50/33/42/+7/0.13/0/000/00       51 W
3/12 39/25/32/-3/0/0/685/97          44 W      AERO 45 MPH W
3/13 37/19/28/-7/0/0/660/93          26 SSE
3/14 50/25/38/+2/0/0/613/86          24 SSW
3/15 59/34/47/+11/0/0/686/96         17 SSW
3/16 42/29/36/0/0/0/000/00           30 NE
3/17 47/28/38/0/+1/671/93            21 SSW   
3/18 59/31/45/+8/0/0/448/62          37 SSW    AERO 40 MPH S
3/19 45/36/41/+4/0.04/0/000/00       22 S     
3/20 36/25/31/-7/0/0/.../..          26 NNE
3/21 43/23/33/-5/0/0/.../..          21 S
 
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 22
HIGH 71 IN 1948
LOW 3 IN 1885
PRE 3.48 INS. IN 2001
SNOW 8.7 INS. 1967
WIND 84e MPH E IN 1977
 
RECORDS FOR MARCH 23
HIGH 78 IN 1938
LOW 3 IN 1934
PRE 1.58 INS. IN 1903
SNOW 3.0 INS. IN 1977
WIND 78e MPH W IN 1940
 
TODAY'S REPORT PREPARED BY: Andrew Hoell