BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, FEBRUARY 22, 2007  
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:
 
7 A.M.   
Weather: Scattered altocumulus, thin overcast cirrostratus   
Temperature: 29F, Dew point: 22F, Wind: E at 6 kts 
Sea-level pressure: 29.88 inches Hg, falling 
Visibility: 40 miles  
6-hourly min. temp. 28 deg. 
Snow on ground: trace
BHO SA 1155 110 SCT E200 –OVC 40 117/29/22/0806/988/ 
THN K LYR ALNG HRZN NW-N-SE/ 8/037 57011 10030 20028
 
10 A.M.    
Weather: Overcast altostratus 
Temperature: 35F, Dew point: 20F, Wind: SE AT 10 kts  
Sea-level pressure: 29.83 inches Hg, falling 
Visibility: 35 miles, light haze  
BHO SA 1455 E170 OVC 35 101/35/20/1410/983/ FEW AC NW-NE 
SUN DMLY VSBL LGT HZ/ 8/07/ 58016
 
1 P.M.    
Weather: Overcast altostratus
Temperature: 39F, Dew point: 22F, Wind: SSE AT 11 kts
Sea-level pressure: 29.72 inches Hg, falling 
Visibility: 25 miles   
6-hourly max. temp. 39 deg.  
BHO SA 1755 E150 OVC 25 063/39/22/1511/972/ HZY/ 
8/01/ 56038 10039 20029
 
WEATHER SUMMARY FOR WEDNESDAY, FEBRUARY 21
 
TEMPERATURE (DEGREES F)
MAX.....44    NORMAL.....38 
MIN.....30    NORMAL.....21   
MEAN....37    NORMAL.....29
 
DEPARTURE FROM 30-YEAR NORMAL..........+8
TOTAL DEPARTURE FOR THE MONTH........-114 (-5.2 DEGREES/DAY) 
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY..........28   DEPARTURE........-8
TOTAL HEATING UNITS FOR THE MONTH.........901   DEPARTURE......+120 
TOTAL HEATING UNITS FOR THE SEASON.......3845   DEPARTURE......-482
TOTAL HEATING UNITS LAST SEASON TO DATE..3803   DIFFERENCE......+42
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............29 W   AT  3:42 P.M.      
                   AEROVANE.............28 WNW AT  1:39 P.M.      
                   ASOS.................26 WNW AT  1:40 P.M.     
                   DAVIS................31 WNW AT  1:39 P.M.       
FASTEST MILE FOR YESTERDAY..............22 WNW AT  1:39 P.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...........22 WNW AT  1:40 P.M.      
MAXIMUM 2-MINUTE DAVIS AVERAGE..........24 WNW AT  1:40 P.M.     
AVERAGE WIND SPEED AND DIRECTION......11.3 W  
                    ASOS..............11.6      
                    DAVIS.............11.8 WNW [284 deg] 
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE.....-0.14
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........2.35  DEPARTURE.....-0.66  
                         ASOS..............2.36    
TOTAL PRECIPITATION FOR THE YEAR...........5.29  DEPARTURE.....-2.50  
                         ASOS..............5.23
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE......-0.5
TOTAL SNOWFALL FOR THE MONTH................2.3  DEPARTURE.....-10.2  
TOTAL SNOWFALL FOR THE SEASON...............8.9  DEPARTURE.....-33.0 
 
PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY 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
 
2/1  35/20/28/+2/0/0/126/21         37 S    Aero 34 MPH S
2/2  35/28/32/+6/0.18/0.3/000/00    20 NW
2/3  32/19/26/0/0.05/0.4/574/95     39 W    Aero 47 MPH W  
2/4  22/10/16/-10/0/0/601/99        39 WSW  Aero 40 MPH WSW
2/5  16/5/11/-16/0/0/493/81         61 W    Aero 60 MPH W  
2/6  24/10/17/-10/0/0/593/97        38 W    Aero 36 MPH W 
2/7  21/8/15/-12/0/0/474/77         43 W    Aero 41 MPH W
2/8  25/11/18/-9/0/0/370/60         48 WSW
2/9  26/15/21/-6/0/0/600/97         44 WSW  Aero 42 MPH WSW
2/10 32/13/23/-4/0/0/199/32         28 W     
2/11 31/14/23/-4/0/0/456/73         27 SSW  
2/12 36/20/28/0/0/0/602/96          43 WSW  Aero 40 MPH W  
2/13 22/6/14/-14/0.02/0.2/226/36    28 NW   
2/14 36/13/25/-3/2.09/1.4/000/00    47 NE   Aero 52 MPH NE
2/15 21/9/15/-13/0/0/616/97         46 W    Aero 53 MPH W
2/16 27/9/18/-10/0/0/624/98         51 W    Aero 49 MPH W
2/17 34/17/26/-3/0/0/596/93         42 W
2/18 33/16/25/-4/0/0/289/45         38 WNW  Aero 40 MPH WNW  
2/19 20/5/13/-16/0/0/646/100        46 WNW  Aero 51 MPH WNW                              
2/20 48/17/33/+4/T/0/266/41         35 SSW  Aero 34 MPH SSW  
2/21 44/30/37/+8/0/0/606/93         29 W    Aero 28 MPH WNW
 
2/22 morning low temp. 28 deg; normal now 22 deg.
 
2/14 - NEW RECORD DAILY PRECIPITATION OF 2.09 INCHES;  
the previous record was 1.95 inches in 1940.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR FEBRUARY 22
HIGH 63F IN 1997
LOW -1F IN 1918
PRECIP 1.38 INCHES IN 1900
SNOWFALL 8.0 INCHES IN 1893
PEAK GUST 74 MPH S IN 1974
 
RECORDS FOR FEBRUARY 23
HIGH 62F IN 1990
LOW -8F IN 1907
PRECIP 1.48 INCHES IN 1967
SNOWFALL 10.6 INCHES IN 1967
PEAK GUST 73 MPH WNW IN 1974
 
TODAY'S REPORT By: Stephanie Radner