BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, JULY 16, 2009
ALL TIMES ARE IN EASTERN STANDARD TIME
 
STILL NO 80 DEGREE DAYS THIS SUMMER
 
We continue to set an all-time record with no 80
degree days this summer to date. Another ongoing
record during this cool summer is the no 80's in
July to date. The longest stretch during this month
without 80 degrees occurred in 1918 when it ended
on July 16 with 85 degrees. There is a good chance
that we will break that record, since today's high
temperature as of 2:00 PM EDT is only 77F.  The
extended stretch of below normal daily temperatures
began on June 28th.
 
Today's observations:
 
7 A.M.  
Weather: Scattered stratocumulus, broken altocumulus
Temperature: 69F, Dew point: 63F, Wind: S at 8 kts
Wind: Direction variable SE to SSW
Sea-level pressure: 29.89 inches Hg, falling
Visibility: 10 miles, hazy
6-hour minimum temp: 62F
24-hour precipitation: 0.00 inch
BHO SA 1155 65 SCT E140 BKN 10 123/69/63/1708/989/
HAZY WND 13V21/ 8/530 58008 10069 20062
 
10 A.M.  
Weather: Scattered stratocumulus, overcast altocumulus,
moderate cumulus forming W to NW, few small breaks in
overcast
Temperature: 74F, Dew point: 61F, Wind: S at 14 kts  
Sea-level pressure: 29.86 inches Hg, falling
Visibility: 15 miles, hazy
BHO SA 1455 55 SCT E110 OVC 15 111/74/61/1714/986/
MDT CU FRMG W-NW FEW SML BRKS IOVC HAZY/ 8/270 56012
 
1 P.M.  
Weather: Scattered stratocumulus, overcast altostratus,
cumulonimbus NE moving ENE, breaks in overcast NW-NE,
light rain shower
Temperature: 77F, Dew point: 66F, Wind: S at 13 kts
Sea-level pressure: 29.81 inches hg, falling
Visibility: 12 miles, hazy
6-hourly max. temp. 77F
6-hour precipitation: Trace
BHO SA 1755 50 SCT E80 OVC 12RW- 095/77/66/1713/981/
BRKS IOVC NW-NE CB NE MOVG ENE HAZY/
8/370 56016 MANUAL 6000/ 10077 20069
 
WEATHER SUMMARY FOR WEDNESDAY, JULY 15
 
TEMPERATURE (DEGREES F)
MAX.....79    NORMAL.....82
MIN.....55    NORMAL.....62
MEAN....67    NORMAL.....72
 
DEPARTURE FROM 30-YEAR NORMAL...........-5
TOTAL DEPARTURE FOR THE MONTH..........-89  [-6.1 DEGREES/DAY]
 
HEATING DEGREE DATA WILL RESUME IN SEPTEMBER
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............30 WSW AT 11:44 A.M.
                   AEROVANE..............28 WSW AT 11:44 A.M.  
                   ASOS..................29 W   AT 11:44 A.M.  
                   DAVIS.................28 W   AT 11:43 A.M. 
FASTEST MILE FOR YESTERDAY...............20 SW  AT  1:11 P.M. *
MAXIMUM 2-MINUTE ASOS AVERAGE............21 W   AT 11:44 A.M.  
MAXIMUM 2-MINUTE DAVIS AVERAGE...........20 SW  AT  1:12 P.M. 
AVERAGE WIND SPEED AND DIRECTION.......11.9 WSW
                   ASOS................11.2
                   DAVIS...............11.1 WSW [250 DEG]
* last of several occurrences
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE....-0.12
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........3.09  DEPARTURE....+1.27
                         ASOS..............3.15 
TOTAL PRECIPITATION FOR THE YEAR..........26.73  DEPARTURE....-0.76
                         ASOS.............27.80
 
PRELIMINARY CLIMATE SUMMARY FOR JULY 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
 
7/1  62/57/60/-10/0.51/000/00   25 NNE   TSTM
7/2  66/56/61/-9/1.00/000/00    29 SSW   TSTM
7/3  75/58/67/-3/T/283/31       23 WSW
7/4  77/59/68/-2/0/838/92       43 W      
7/5  78/54/66/-5/0/856/94       33 W     
7/6  79/60/70/-1/0/883/97       20 SSE
7/7  66/58/62/-9/0.73/027/03    28 SE    TSTM
7/8  67/56/62/-9/0.23/091/10    27 NNE   TSTM
7/9  66/55/61/-10/0/689/76      23 NE
7/10 76/54/65/-6/0/896/99       21 SW
7/11 77/56/67/-5/0.29/686/76    36 S
7/12 78/60/69/-3/0.33/650/72    30 SSW   TSTM
7/13 76/55/66/-6/0/802/89       32 SW 
7/14 75/56/66/-6/0/.../..       25 WNW
7/15 79/55/67/-5/0/.../..       30 WSW
 
7/16 our morning low temp: 62F; the normal low is now 62F
 
NEW DAILY RECORDS FOR JULY 2009 TO DATE...
NONE
 
DAILY EXTREMES
 
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR JULY 16
HIGH 94F IN 1968, 1980, 1983, 1999
LOW 50F IN 1889, 1903
PRECIP 0.89 INS IN 1919
WIND 48e MPH SW 1944
 
RECORDS FOR JULY 17
HIGH 96F IN 1999
LOW 47F IN 1892
PRECIP 1.39 INS IN 1989
WIND 46 MPH WNW IN 1971
 
TODAY'S REPORT PREPARED BY: Stephanie Radner/Bob Skilling