BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, JUNE 19, 2009   
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:
 
7 A.M.  
Weather: Obscured by light rain and fog
Temperature: 63F, Dew point: 63F, Wind: SSE at 14G18 kt
Sea-level pressure: 29.82 inches Hg, falling
Visibility: 1/16 of a mile
6-hour minimum temp: 62F
24-hour rainfall: 0.76 inches
BHO SA 1155 W2 X1 1/16R-F 097/63/63/1514G18/982/
8//// 55001 6//// 70076 10063 20062
 
10 A.M.  
Weather: Obscured by light rain and fog
Temperature: 64F, Dew point: 64F, Wind: SSE at 14G19 kt
Sea-level pressure: 29.78 inches Hg, falling
Visibility:   1/8 of a mile
3-hour rainfall: 0.08
BHO SA 1455 W2 X1 1/8RF 085/64/64/1514G19/978/
8//// 55012 6008/
 
1 P.M.  
Weather: Obscured by light drizzle and fog
Temperature: 66F, Dew point: 66F, Wind:
Sea-level pressure: 29.75 inches Hg, falling
Visibility: 1/4 of a mile
6-hour max. temp: 66F
6-hour rainfaill: 0.15 inches
BHO SA 1755 W2 X1 1/4L-F 076/66/66/1408/975/
8//// 56009 6015/ 10066 20063
 
WEATHER SUMMARY FOR THURSDAY, JUNE 18
 
TEMPERATURE (DEGREES F)
MAX.....65    NORMAL.....76
MIN.....52    NORMAL.....57
MEAN....59    NORMAL.....66
 
DEPARTURE FROM 30-YEAR NORMAL...........-7
TOTAL DEPARTURE FOR THE MONTH..........-68 [-4.0 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............6  DEPARTURE.......+4
TOTAL HEATING UNITS FOR THE MONTH............88  DEPARTURE......+30
TOTAL HEATING UNITS FOR THE SEASON.........6209  DEPARTURE.....-146
TOTAL HEATING UNITS LAST SEASON TO DATE....5942  DIFFERENCE....+267
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............35 ESE AT 10:39 P.M. 
                   AEROVANE..............31 ESE AT 10:38 P.M.   
                   ASOS..................30 SSE AT 10:40 P.M.     
                   DAVIS.................32 ESE AT 10:59 P.M.        
FASTEST MILE FOR YESTERDAY...............25 ESE AT 10:40 P.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE............21 SSE AT 11:59 P.M.       
MAXIMUM 2-MINUTE DAVIS AVERAGE...........23 ESE AT 10:40 P.M.      
AVERAGE WIND SPEED AND DIRECTION.......14.3 SE 
                   ASOS................13.1
                   DAVIS...............13.0 SE [132 DEG]
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M... 0.76  DEPARTURE....+0.62
                         ASOS..............0.78
TOTAL PRECIPITATION FOR  JUNE..............1.92  DEPARTURE....-0.45
                         ASOS..............1.92 
TOTAL PRECIPITATION FOR THE YEAR..........20.42  DEPARTURE....-3.69
                         ASOS.............21.47 
 
PRELIMINARY CLIMATE SUMMARY FOR JUNE 2009 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane wind recording system gust when significant
TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized
 
6/1  69/41/55/-7/0/706/78          29 SSW    AERO 25 MPH SSW
6/2  76/53/65/+3/T/525/58          28 S      AERO 24 MPH S
6/3  69/54/62/0/T/254/28           23 SSW    
6/4  73/53/63/0/0/327/36           22 SSE    
6/5  64/51/58/-5/0.05/000/00       21 NE
6/6  73/51/62/-1/0.01/428/47       25 SSE
6/7  79/56/68/+4/0/583/64          28 W      AERO 24 MPH W
6/8  73/57/65/+1/0/529/58          18 ENE
6/9  59/51/55/-9/0.10/000/00       27 E
6/10 59/52/56/-8/0.00/000/00       21 NE     AERO 18 MPH NE
6/11 57/52/55/-10/0.17/000/00      23 NNE    AERO 21 MPH NE
6/12 70/53/62/-3/0.43/119/13       30 SSE    AERO 29 MPH SSE
6/13 75/59/67/+2/T/796/87          23 NNE
6/14 63/54/59/-6/0.34/101/11       20 E
6/15 60/52/56/-10/0.06/027/03      20 NE
6/16 64/51/58/-8/T/.../..          22 NNE    AERO 19 MPH NNE
6/17 74/50/62/-4/0/.../..          28 S      AERO 24 MPH S
6/18 65/52/59/-7/.../.../..        35 ESE
 
NEW DAILY RECORDS FOR JUNE 2009 TO DATE...
None
 
DAILY EXTREMES
 
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR JUNE 19
HIGH 92F IN 1923
LOW 40F IN 1920
PRECIP 3.92 INS 1922
PEAK GUST 66e MPH NW IN 1940
 
RECORDS FOR JUNE 20
HIGH 94F IN 1953
LOW 41F IN 1918
PRECIP 2.62 INS 1945
PEAK GUST 63 MPH NE IN 1967
 
TODAY'S REPORT PREPARED BY: Andrew Hoell