BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, MARCH 30, 2007  
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:
 
7 A.M.   
Weather: Thin broken altocumulus, cirrus 
Temperature: 35F, Dew point: 13F, Wind: WNW at 10 kts
Sea-level pressure: 30.28 inches Hg, falling 
Visibility: 75 miles 
6-hour min. temp. 32F
BHO SA 1155 E180 BKN 250 -BKN 75 255/35/13/2510/028/ 8/031 58002 10035 20032
 
10 A.M.   
Weather: Scattered altocumulus, thin broken cirrus  
Temperature: 51F, Dew point: 0F, Wind: W at 10 kts
Sea-level pressure: 30.24 inches Hg, falling 
Visibility: 80 miles 
BHO SA 1455 150 SCT 250 –BKN 80 242/51/13/2810/024/ 8/031 58013
 
1 P.M.   
Weather: Broken clouds
Temperature: 59F, Dew point: 1F, Wind: W at 12G26 kts 
Wind: Peak wind 26 kts from W @ 41 past the hour/variable direction SSW to NW
Sea-level pressure:  30.14 inches Hg, falling rapidly  
Visibility: 90 miles 
Six hourly max. temp: 59F 
BHO SA 1755 110 SCT E180 BKN 200 BKN 90 206/59/1/2712G26/014/ 
VSBY LIKELY 100 MILES PK WND 2726/41 WND 21V32 PRESFR/ 
8/072 58036 10059 20035
 
WEATHER SUMMARY FOR THURSDAY, MARCH 29
 
TEMPERATURE (DEGREES F)
MAX.....50    NORMAL.....49 
MIN.....28    NORMAL.....32
MEAN....39    NORMAL.....40
 
DEPARTURE FROM 30-YEAR NORMAL..........- 1
TOTAL DEPARTURE FOR THE MONTH..........-22 (-1.0 DEGREES/DAY) 
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY..........26   DEPARTURE........+ 1
TOTAL HEATING UNITS FOR THE MONTH.........864   DEPARTURE........+18 
TOTAL HEATING UNITS FOR THE SEASON.......4955   DEPARTURE.......-461
TOTAL HEATING UNITS LAST SEASON TO DATE..4927   DIFFERENCE.......+28
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............46 NW   AT  3:41 P.M.         
                   AEROVANE............ 45 NW   AT  3:41 P.M.         
                   ASOS.................43 NW   AT  3:41 P.M.          
                   DAVIS................43 W    AT 12:24 A.M.            
FASTEST MILE FOR YESTERDAY..............33 WNW  AT 12:05 A.M.     
MAXIMUM 2-MINUTE ASOS AVERAGE...........33 WNW  AT 12:24 A.M.       
MAXIMUM 2-MINUTE DAVIS AVERAGE..........Unknown      
AVERAGE WIND SPEED AND DIRECTION......19.3 NW
                    ASOS..............17.9      
                    DAVIS.............19.6 NW [307 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..........6.02  DEPARTURE.....+1.38  
                         ASOS..............6.01    
TOTAL PRECIPITATION FOR THE YEAR..........11.74  DEPARTURE.....-1.74
                         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...............13.5  DEPARTURE......+2.4  
TOTAL SNOWFALL FOR THE SEASON..............27.4  DEPARTURE.....-29.1 
 
    
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 morning low temp. 32 deg; normal now 32 deg. 
      
* 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 MARCH 30
HIGH 83 IN 1977
LOW 10 IN 1887
PRECIP 2.82 INS. IN 2001
SNOWFALL 3.9 INS. IN 1957
PEAK GUST 60 MPH NW IN 1999
 
RECORDS FOR MARCH 31
HIGH 89 IN 1998  [RECORD HIGH FOR MONTH]
LOW 16 IN 1923
PRECIP 2.89 IN 1987
SNOWFALL 15.0 IN 1997
PEAK GUST 81 MPH SSE IN 1987
 
TODAY'S REPORT By: Stephanie Radner