BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY                                 
MONDAY, JUNE 19, 2006
ALL TIMES ARE IN EASTERN STANDARD TIME

FIRST 90-DEGREE DAY OF THE YEAR AND SEASON ON SUNDAY
VERY WARM TO HOT AND HUMID CONDITIONS AGAIN TODAY
 
Our temperature reached 90 degrees for the first time
this month and season yesterday with an official maximum
reading of 89.8 degrees in the Hazen shelter about 3 p.m. 
Along with the heat came uncomfortably humid conditions
with dewpoints reaching the upper 60's.
 
After an overnight low of 68 degrees, the temperature had
already reached the 80-degree mark by 9 a.m. and touched 
90 degrees by early afternoon. 
 
Today's observations:
 
7 A.M.
Weather: Partial obscurement;  1/8 (about 2/10) with haze 
Temperature: 75F, Dew point: 68F, Wind: SSW at 9 mph
Sea-level pressure: 29.93 inches Hg, steady
Visibility: 4 miles thick haze 
Six hourly min. temp. 68 deg.
24 hourly rainfall: 0.00 in.  
BHO SA 1155 –X 4H 136/75/68/2108/993/ H1/ 52001 10075 20068
  
10 A.M.
Weather: Partial obscurement with 1/8 haze and thin scattered cirrus 
Temperature: 87F, Dew point: 69F, Wind: SSW at 7 mph  
Sea-level pressure: 29.90 inches Hg, falling 
Visibility: 5 miles, thick haze  
BHO SA 1455 –X 300 –SCT 5H 124/87/69/2006/990/ H1/ 8/001 58012 
 
1 P.M.
Weather: High thin overcast with few Cu east
Temperature: 88F, Dew point: 65F, Wind: S at 20 MPH 
Sea-level pressure: 29.85 inches Hg, falling 
Visibility: 9 miles, hazy 
BHO SA 1755 250 –OVC 9 110/88/65/1817/985/ FEW CU E FEW LWR CI
BINOVC NW HAZY/ 8/101 58014 10090 20075
 
WEATHER SUMMARY FOR SUNDAY, JUNE 18
 
TEMPERATURE (DEGREES F)
MAX.....90   NORMAL.....76   Time of Max. 1:57  P.M. [89.8] 
MIN.....60   NORMAL.....57   Time of Min. 1:58  A.M. [60.1] 
MEAN....75   NORMAL.....66   
DEPARTURE FROM 30-YEAR NORMAL.....+ 9
TOTAL DEPARTURE FOR THE MONTH.....-22 (-1.4 DEGREES/DAY)
 
HEATING DEGREE DAYS
HEATING DEGREE DAY UNITS FOR YESTERDAY......0   DEPARTURE.....-2
TOTAL HEATING UNITS FOR THE MONTH..........76   DEPARTURE....+20
TOTAL HEATING UNITS FOR THE SEASON.......5790   DEPARTURE...-565
TOTAL HEATING UNITS LAST SEASON TO DATE..6349   DIFFERENCE..-572
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.........22 S   AT 5:44  P.M. *
                   AEROVANE..........23 S   AT 5:37  P.M.      
                   ASOS..............21 S   AT 5:43  P.M.      
                   DAVIS.............24 SSW AT 5:58  P.M.        
FASTEST MILE FOR YESTERDAY...........16 S   AT 5:43  P.M. * 
MAXIMUM 2-MINUTE ASOS AVERAGE........17 S   AT 5:44  P.M.    
                   DAVIS.............17 SSW AT 2:33  P.M.   
AVERAGE WIND SPEED AND DIRECTION.....9.0 S 
                   ASOS..............9.5 S  [180 deg]
                   DAVIS.............7.0 S [190 deg]
 
* last of several occurrences...
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00   DEPARTURE....-0.13   
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........8.47   DEPARTURE....+6.10                         
TOTAL PRECIPITATION FOR ASOS FOR MONTH.....8.39 (corrected)
TOTAL PRECIPITATION FOR THE YEAR..........30.47   DEPARTURE....+6.36
                         ASOS.............30.06 (corrected)
 
PRELIMINARY CLIMATE SUMMARY FOR JUNE 2006......CALENDAR DAY DATA
DATA REPORTED:
DATE  MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
 
AERO: Aerovane recording wind system when significant
TSTM: Thunderstorm day
....: Data not yet available
 
6/1  86/60/73/+11/0.47/443/49    45 WSW  TSTM
6/2  69/56/63/+1/0.40/000/00     25 NNE
6/3  56/50/53/-9/2.40/000/00     44 NNE
6/4  59/49/54/-9/0.14/000/00     43  N
6/5  68/54/61/-2/0/309/34        20 WSW
6/6  70/55/63/0/0.06/355/39      23 ENE 
6/7  56/50/53/-11/4.01/000/00    54 NNE 
6/8  57/49/53/-11/0.14/000/00    30 N
6/9  63/56/60/-4/0.11/000/00     15 SW [daily precip. corrected]
6/10 58/50/54/-10/0.51/000/00    36 W  [daily precip. corrected] 
6/11 70/49/60/-5/0/750/80        37 W
6/12 77/53/65/0/0/777/85         26 W
6/13 79/58/69/+4/0/631/69        20 SE 
6/14 78/58/68/+3/0/339/37        28 NNE
6/15 74/56/65/-1/0.14/287/31     33 NW   
6/16 84/57/71/+5/0/.../..        22 W   
6/17 83/62/73/+7/0.09/.../..     30 SW
6/18 90/60/75/+9/0/.../..        22 S
 
6/19 morning low temp. 68; normal now 57 deg.
 
NEW DAILY RECORDS FOR JUNE TO DATE....
6/3 New rainfall record of 2.40 ins; previous record 1.21 ins. in 1947
6/7 New rainfall record of 4.01 ins; previous record 1.68 ins. in 1913
 
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 by: Robert Skilling