BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, APRIL 1, 2006 
ALL TIMES ARE IN EASTERN STANDARD TIME
 
APRIL SHOWERS ARRIVE THIS MORNING AFTER THE 2ND
DRIEST MARCH ON RECORD WITH JUST 0.31 PRECIPITATION 
MARCH TEMPERATURES AVERAGED A DEGREE WARMER THAN NORMAL 
DRY WEATHER RECORD FOR THIS TIME OF YEAR AND
FEBRUARY-MARCH WITH 3.77 INS IS NEW RECORD LOWEST 
AMOUNT FOR THOSE TWO MONTHS
 
Some light showers have amounted to only a trace of
rainfall this morning and a clearing trend began
late this morning.
 
RECORD LOWEST MARCH PRECIPITATION...
 
1. March 1915.....0.06 in.
2. March 2006.....0.31 in.
3. March 1981.....0.63 in.
4. March 1894.....1.21 ins.
5. March 1935.....1.41 ins.
 
RECORD LOWEST MARCH SNOWFALL....
 
1.  trace    in 1921
2.  0.1 inch in 1979
3.  0.1 inch in 2006
4.  0.2 inch in 1903
5.  0.3 inch in 1930
 
MARCH 2006 DATA 
Mean temp. 37.3 [+1.0]
Total HDD = 853 [-41 ]
Season HDD = 4947 [-517]
Max. 71/31st
Min. 14/1st
Precip: 0.31 [-4.48 ]
No. of days measurable: 4
Snowfall: 0.1 [-11.4]
Sunshine: 13365 mins. [222.8 hours] 
60% [12 pts. above average]
Prevailing wind: W 25% 
Peak wind gust: 56 MPH WSW [15TH]
Av. wind speed: 13.5 [uncorr.] & 13.9 [corrected]
Corrected monthly mean temp: 36.5 deg.
 
Today's observations:
 

7 A.M.
Weather: Middle and high overcast 
Temperature: 49F; Dew point: 45F, Wind: S 15 MPH
Sea-Level pressure: 29.85 inches Hg, falling
Visibility: 9 miles     
Precip: 24 hours: 0.00     

Snowfall: 24 hours: 0.00
6-hourly min. temp. 46 deg.
 

BHO SA 1155 130 SCT E180 BKN 250 OVC 9 107/49/45/1813/985/
AC LYR INCRSNG FEW THN SPTS IOVC E THN FH ALQDS/
8/057 58015 10050 20046

 
10 A.M.
Weather: Overcast, breaks west to northwest
Temperature: 56F, Dew point: 47F, Wind: S AT 15 MPH
Sea-Level pressure: 29.80 inches Hg, falling  
Visibility: 10 miles, hazy
3-HOURLY PRECIP: trace
 
BHO SA 1455 100 SCT E130 OVC 10 091/56/47/1913/980/
FEW ACC BINOVC W-NW RE1355/ 8/08/ 56019 6000/  
 

WEATHER SUMMARY FOR FRIDAY, MARCH 31
 
TEMPERATURE (DEGREES F)
MAX.....71   NORMAL.....50  HAZEN..71.3 @  1:45 p.m.
MIN.....43   NORMAL.....32  HAZEN..43.3 @  3:42 a.m. 
MEAN....57   NORMAL.....41   
DEPARTURE FROM 30-YEAR NORMAL.......+16
TOTAL DEPARTURE FOR THE MONTH.......+37(+1.0 DEGREE/DAY)
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.......... 8   DEPARTURE......-16
TOTAL HEATING UNITS FOR THE MONTH.........817   DEPARTURE......-41
OTAL HEATING UNITS FOR THE SEASON........4947   DEPARTURE.....-517
TOTAL HEATING UNITS LAST SEASON TO DATE..5464   DIFFERENCE....-516
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.........37 SSW AT 2:05 P.M. *
                   AEROVANE..........37 SSW AT 2:05 P.M. *  
                   ASOS..............35 S   AT 2:05 P.M.    
                   DAVIS.............48 S   AT 2:04 P.M. **
 
* last of several occurrences
** erroneously too high
 
FASTEST MILE FOR YESTERDAY...........29 SSW AT 2:05 P.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE........29 SSW AT 2:06 P.M.   
MAXIMUM 2-MINUTE DAVIS AVERAGE.......35 SSW AT 2:06 P.M.
 
AVERAGE WIND SPEED AND DIRECTION...17.7  S
                   ASOS............17.8  SSW[200 deg]
                   DAVIS...........16.3  S [190 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 MARCH..............0.31   DEPARTURE....-4.48
                         ASOS..............0.33
TOTAL PRECIPITATION FOR THE YEAR...........9.72   DEPARTURE....-3.59
                         ASOS..............9.44     
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M......... 0.0   DEPARTURE.....-0.2
TOTAL SNOWFALL FOR MARCH....................0.1   DEPARTURE....-11.4 
TOTAL SNOWFALL FOR THE SEASON..............51.2   DEPARTURE.....-4.9 
 
PRELIMINARY CLIMATE SUMMARY FOR MARCH 2006......CALENDAR DAY DATA
DATA REPORTED:
DATE  MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
 
AERO: Aerovane recording wind system when significant
TSTM: Thunderstorm day
....: Data not yet available
 
3/1  32/14/23/-9/0/0/674/100        32 WSW
3/2  31/21/26/-6/0.01/T/054/08      35 NNW
3/3  28/16/22/-10/0/0/626/92        46 WNW  Aero 52 WNW
3/4  38/16/27/-6/0/0/587/86         48 NW
3/5  44/23/34/+1/0/0/686/100        45 WNW  Aero 48 WNW
3/6  39/22/31/-2/0/0/496/72         33 NW
3/7  41/21/31/-2/0/0/574/83         20 NW  
3/8  45/22/34/0/0/0/672/94          24 WNW
3/9  42/32/37/+3/T/T/000/00         32 SE
3/10 64/42/53/+19/0/0/189/27        44 WSW
3/11 57/38/48/+13/0/0/583/83        43 W
3/12 54/40/47/+12/T/0/012/02        39 SSW  Aero 42 SSW
3/13 54/43/49/+14/0.09/0/000/00     27 S
3/14 56/33/45/+9/0.17/0/256/36      44 W    Aero 48 W
3/15 41/28/35/-1/T/T/400/56         56 WSW  Max. Inc. 62 MPH
3/16 42/26/34/-2/0/0/645/90         42 W
3/17 41/21/31/-6/0/0/698/97         30 NW
3/18 38/17/28/-9/0/0/550/76         32 W
3/19 34/21/28/-9/T/T/298/41         35 W
3/20 34/18/26/-12/0/0/692/95        42 WNW
3/21 45/19/32/-6/0/0/629/86         33 W
3/22 40/28/34/-4/0/0/022/03         28 WNW
3/23 55/28/42/+4/0/0/354/48         28 W
3/24 47/33/40/+1/0/0/030/04         23 NE
3/25 38/33/36/-3/0.04/T/000/00      28 NE
3/26 49/34/42/+3/T/T/157/21         32 WNW
3/27 56/32/44/+4/0/0/734/98         30 WNW 
3/28 54/34/44/+4/0/0/638/85         22 SSE 
3/29 63/34/49/+9/0/0/732/97         25 S
3/30 65/41/53/+12/0/0/675/89        23 SE   
3/31 71/43/57/+16/0/0/700/92        37 SSW
 
4/1  morning low temp. 46 deg; normal now 33 deg
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind to 1940.
 
RECORDS FOR APRIL 01
HIGH 74 IN 1967
LOW 06 IN 1923
PRECIP 3.47 INCHES IN 2004 (record for April)
PEAK GUST 75 MPH SSW IN 1962

RECORDS FOR APRIL 02
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: Robert Skilling