BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, MARCH 19, 2007  
ALL TIMES ARE IN EASTERN STANDARD TIME
 

Today's observations:
 
7 A.M.   
Weather: Clear
Temperature: 24F, Dew point: 9F, Wind: WSW at 14G23 kt
Sea-level pressure: 30.30 inches Hg, rising
Visibility: 70 miles
6-hour min. temp. 22F
Snow on ground: 4 inches
BHO SA 1155 CLR 70 259/24/9/2414G23/030/ FEW SC DSNT NE-E/ 
8/500 4/004 51033 10024 20022
 
10 A.M.   
Weather: Thin broken cirrus
Temperature: 33F, Dew point: 12F, Wind: WSW at 14G24 kt  
Sea-level pressure: 30.33 inches Hg, rising
Visibility: 70 miles
BHO SA 1455 250 –BKN 70 272/33/12/2414G24/033/ 8/001 50013
 
1 P.M.   
Weather: Broken cirrostratus
Temperature: 38F, Dew point: 11F, Wind: SW at 11 kt  
Sea-level pressure: 30.26 inches Hg, falling
Visibility: 70 miles
BHO SA 1755 E250 BKN 70 248/38/11/2311/026/ 8/008 56024 10038 20024
 

WEATHER SUMMARY FOR SUNDAY, MARCH 18
 
TEMPERATURE (DEGREES F)
MAX.....31    NORMAL.....45 
MIN.....20    NORMAL.....28
MEAN....26    NORMAL.....37
 
DEPARTURE FROM 30-YEAR NORMAL..........-11
TOTAL DEPARTURE FOR THE MONTH..........-31 (-1.9 DEGREES/DAY) 
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY..........39   DEPARTURE.......+11
TOTAL HEATING UNITS FOR THE MONTH.........584   DEPARTURE.......+28 
TOTAL HEATING UNITS FOR THE SEASON.......4675   DEPARTURE......-451
TOTAL HEATING UNITS LAST SEASON TO DATE..4629   DIFFERENCE......+46
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............43 W   AT  4:58 P.M.         
                   AEROVANE.............42 W   AT  4:55 P.M.       
                   ASOS.................40 W   AT  5:00 P.M.       
                   DAVIS................44 W   AT  4:59 P.M.         
FASTEST MILE FOR YESTERDAY..............33 W   AT  4:51 P.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...........31 W   AT  4:53 P.M.    
MAXIMUM 2-MINUTE DAVIS AVERAGE..........33 W   AT  4:53 P.M.    
AVERAGE WIND SPEED AND DIRECTION........19.5 WSW 
                    ASOS................19.3     
                    DAVIS...............17.3 W  [261 deg] 
 
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..........5.24  DEPARTURE.....+2.34  
                         ASOS..............5.22    
TOTAL PRECIPITATION FOR THE YEAR..........10.96  DEPARTURE.....-0.78
                         ASOS.............10.85  
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE......-0.4
TOTAL SNOWFALL FOR THE MONTH................8.9  DEPARTURE......+1.1  
TOTAL SNOWFALL FOR THE SEASON..............22.8  DEPARTURE.....-30.4 
 
    
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
 
* 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 19
HIGH 69 IN 1903
LOW -2 IN 1967
PRECIP 1.69 INCHES IN 1956
SNOWFALL 17.6 INCHES IN 1956 [RECORD FOR MONTH]
PEAK GUST 75e MPH WNW IN 1941
 
RECORDS FOR MARCH 20
HIGH 79 IN 1945
LOW 4 IN 1885
PRECIP 1.39 INS. IN 1957
SNOWFALL 11.4 INS. IN 1957
PEAK GUST 63 MPH SE IN 1975
 
TODAY'S REPORT By: Stephanie Radner