BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, APRIL 1, 2007  
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:
 
7 A.M.   
Weather: Broken cirrus
Temperature: 38F, Dew point: 21F, Wind: W at 10 kt 
Sea-level pressure: 30.31 inches Hg, rising
Visibility: 70 miles
6-hour min. 33F
BHO SA 1155 200 SCT 250 –BKN 70 263/38/21/2610/031/ 
THN K LYR ALNG HRZN NE-E/ 8/001 51013 10037 20033
 
10 A.M.   
Weather: Thin overcast cirrus
Temperature: 51F, Dew point: 8F, Wind: S at 4 kt
Sea-level pressure: 30.31 inches Hg, steady 
Visibility: 70 miles
BHO SA 1455 200 BKN 250 –OVC 70 263/51/8/1804/031/ WND L/V/ 8/001 50000
 

WEATHER SUMMARY FOR SATURDAY, MARCH 31
 
TEMPERATURE (DEGREES F)
MAX.....54    NORMAL.....50 
MIN.....38    NORMAL.....32
MEAN....44    NORMAL.....41
 
DEPARTURE FROM 30-YEAR NORMAL..........+ 3
TOTAL DEPARTURE FOR THE MONTH..........-13 (-0.2 DEGREES/DAY) 
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY..........21   DEPARTURE........- 3
TOTAL HEATING UNITS FOR THE MONTH.........903   DEPARTURE........+ 9 
TOTAL HEATING UNITS FOR THE SEASON.......4994   DEPARTURE.......-470
TOTAL HEATING UNITS LAST SEASON TO DATE..4947   DIFFERENCE.......+47
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............28 WNW AT 1:10 A.M.         
                   AEROVANE............ 25 WNW AT 1:07 A.M.         
                   ASOS.................24 NW  AT 1:10 A.M.          
                   DAVIS................25 WNW               
FASTEST MILE FOR YESTERDAY..............19 SSE AT 7:02 P.M.     
MAXIMUM 2-MINUTE ASOS AVERAGE...........20 SSE AT 7:03 P.M.       
MAXIMUM 2-MINUTE DAVIS AVERAGE..........20 WNW      
AVERAGE WIND SPEED AND DIRECTION...... 9.9 WNW
                    ASOS..............10.5      
                    DAVIS..............9.9 WNW [296 deg]
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE.....-0.15
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........0.00  DEPARTURE.....-0.15  
                         ASOS..............0.00    
TOTAL PRECIPITATION FOR THE YEAR..........11.74  DEPARTURE.....-2.04
                         ASOS.............11.64  
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE......-0.2
TOTAL SNOWFALL FOR THE MONTH................0.0  DEPARTURE......-0.2  
TOTAL SNOWFALL FOR THE SEASON..............27.4  DEPARTURE.....-29.3 
 
    
PRELIMINARY CLIMATE SUMMARY FOR MARCH 2007......CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOWFALL/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
 
AERO: Aerovane recording wind system when significant
TSTM: Thunderstorm day
....: Data not yet available
 
3/1  40/22/31/-1/0/0/512/76          24 NW   Aero 23 MPH NW
3/2  49/28/39/+7/1.74/0.4/000/00     48 E    Aero 45 MPH E
3/3  58/33/46/+14/0/0/489/72         44 WNW  Aero 43 MPH WNW
3/4  40/26/33/0/0/0/471/69           37 W
3/5  37/19/28/-5/T/T/198/29          58 W    Aero 57 MPH W 
3/6  19/3/11/-22/0/0/667/97 *        57 W    Aero 61 MPH W
3/7  22/2/12/-21/0/0/504/73          28 SW    
3/8  25/5/15/-19/T/T/471/68          51 WNW  Aero 54 MPH WNW
3/9  34/1/18/-16/0/0/668/96 *        25 S     
3/10 49/22/36/+2/0/0/322/46          39 S    Aero 39 MPH S 
3/11 51/33/42/+7/0.26/0/513/73       32 W 
3/12 55/31/43/+8/0/0/423/60          24 SSW 
3/13 60/36/48/+13/0/0/312/44         35 S    Aero 33 MPH S
3/14 66/42/54/+18/0/0/412/57         36 S
3/15 54/35/45/+9/0.07/0/000/00       36 NW
3/16 35/24/30/-6/1.65/8.5/000/00     55 NE   Aero 53 MPH NE
3/17 34/24/29/-6/1.52/T/000/00       51 NNE  Aero 50 MPH NE 
3/18 31/20/26/-11/0/0/318/44         43 W    Aero 42 MPH W
3/19 40/22/31/-6/0.18/1.0/435/60     38 S    Aero 37 MPH S
3/20 42/21/32/-6/0/0/677/93          46 WSW  Aero 47 MPH W
3/21 36/16/26/-12/0/0/702/96         33 S
3/22 52/31/42/+4/T/0/132/18          47 S    Aero 50 MPH S
3/23 57/41/49/+11/T/0/258/35         35 W
3/24 50/31/41/+2/0.40/3.5/585/79     28 E    Aero 23 MPH E
3/25 45/32/39/0/0.01/0.1/126/17      16 WSW
3/26 45/34/40/+1/0.17/0/026/03       37 S 
3/27 61/41/51/+11/0.02/0/239/32      24 WNW
3/28 54/36/45/+5/0/0/706/94          46 WNW  Aero 48 MPH WNW 
3/29 50/28/39/-1/0/0/739/98          46 NW 
3/30 61/32/47/+6/0/0/.../..          37 W 
3/31 54/33/44/+3/0/0/.../..          28 WNW
      
* Record low maximum temperature of 19 on the 6th surpasses previous 21 set
  in 1916.
* Record low minimum temperature of 3 on the 6th ties previous 3 set in 1948.
* Record low minimum temperature of 1 on the 9th breaks previous 5 set in
  1885, 1943, and 1996.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR APRIL 1
HIGH 74 IN 1967
LOW 6 IN 1923 [RECORD FOR MONTH]
PRECIP 3.47 INCHES IN 2004 [RECORD FOR MONTH]
SNOWFALL 15.0 INCHES IN 1997 [RECORD FOR MONTH]
PEAK GUST 75 MPH SSW IN 1962
 
RECORDS FOR APRIL 2
HIGH 77 IN 1967
LOW 14 IN 1919
PRECIP 1.83 INCHES IN 1970
SNOWFALL 13.0 INCHES IN 1887
PEAK GUST 76 MPH SSW IN 1970

TODAY'S REPORT By: Andrew Hoell