BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, MARCH 23, 2007  
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:
 
7 A.M.   
Weather: Scattered cirrus 
Temperature: 48F, Dew point: 39F, Wind: W at 15 kt
Sea-level pressure: 30.06 inches Hg, rising
Visibility: 50 miles
6-hour min. temp. 48F
24-hour precipitation: trace
Snow on ground: trace
BHO SA 1155 220 SCT 250 –SCT 50 178/48/39/2715/006/ FEW SC 
DSNT SE-SW THN K LYR SW-N/ 8/501 51025 ASOS 70001 10052 20048  
 
10 A.M.   
Weather: Scattered cirrus
Temperature: 55F, Dew point: 23F, Wind: W at 17 kt
Sea-level pressure: 30.08 inches Hg, rising
Visibility: 80 miles
BHO SA 1455 250 SCT 80 185/55/23/2617/008/ 8/001 50007
 
1 P.M.   
Weather: Overcast, light rain shower
Temperature: 52F, Dew point: 24F, Wind: W at 15 kt  
Sea-level pressure: 30.07 inches Hg, falling
Visibility: 75 miles
BHO SA 1755 E90 BKN 130 OVC 75RW- 183/52/24/2615/007/ 
FEW CUFRA N BINOVC NW-N PK WND 2627/08 RB55 PCPN VRY LGT/ 
8/77/ 58002 MANUAL 6000/ 10057 20048
 

WEATHER SUMMARY FOR THURSDAY, MARCH 22
 
TEMPERATURE (DEGREES F)
MAX.....52    NORMAL.....47 
MIN.....31    NORMAL.....30
MEAN....42    NORMAL.....38
 
DEPARTURE FROM 30-YEAR NORMAL...........+4
TOTAL DEPARTURE FOR THE MONTH..........-51 (-2.5 DEGREES/DAY) 
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY..........23   DEPARTURE........-4
TOTAL HEATING UNITS FOR THE MONTH.........713   DEPARTURE.......+47 
TOTAL HEATING UNITS FOR THE SEASON.......4804   DEPARTURE......-432
TOTAL HEATING UNITS LAST SEASON TO DATE..4769   DIFFERENCE......+35
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............47 S   AT 12:56 P.M.         
                   AEROVANE.............50 S   AT 12:56 P.M.       
                   ASOS.................47 SSW AT 12:57 P.M.       
                   DAVIS................54 S   AT 12:56 P.M.         
FASTEST MILE FOR YESTERDAY..............38 S   AT 12:56 P.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...........36 S   AT  1:06 P.M.    
MAXIMUM 2-MINUTE DAVIS AVERAGE..........38 SSW AT 12:00 NOON    
AVERAGE WIND SPEED AND DIRECTION........25.1 S 
                    ASOS................24.9     
                    DAVIS...............23.8 S   [189 deg] 
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M...trace  DEPARTURE.....-0.16
                         ASOS..............0.01
TOTAL PRECIPITATION FOR THE MONTH..........5.42  DEPARTURE.....+1.88  
                         ASOS..............5.41    
TOTAL PRECIPITATION FOR THE YEAR..........11.14  DEPARTURE.....-1.24
                         ASOS.............11.04  
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE......-0.3
TOTAL SNOWFALL FOR THE MONTH................9.9  DEPARTURE......+0.7  
TOTAL SNOWFALL FOR THE SEASON..............23.8  DEPARTURE.....-30.8 
 
    
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/+13/0/0/319/45         35 S    Aero 33 MPH S
3/14 66/42/54/+18/0/0/405/57         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/-11/0/0/258/37         43 W    Aero 42 MPH W
3/19 40/22/31/-6/0.18/1.0/442/61     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 morning low temp. 48 degrees; normal low now 30
 
* 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 23
HIGH 78 IN 1938
LOW 3 IN 1934
PRECIP 1.58 INS. IN 1903
SNOWFALL 3.0 INS. IN 1977
WIND 78e MPH W IN 1940
 
RECORDS FOR MARCH 24
HIGH 70 IN 1920
LOW 6 IN 1906
PRECIP 1.51 INS. IN 1956
SNOWFALL 12.3 INS. IN 1956
PEAK GUST 71 MPH W IN 1968
 
TODAY'S REPORT By: Stephanie Radner