BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, AUGUST 2, 2012 
ALL TIMES ARE IN EASTERN STANDARD TIME
 
JULY 2012 FINISHES AS SEVENTH WARMEST ON RECORD... 
 
July ended up on a cool note, although the average temperature for the
month ended up 2.1 degrees above the 30-year average.
Precipitation for the month was only a tenth of an inch below normal.
Almost all of the rainfall for July (96%) fell in three events that were
relatively evenly spread throughout the month.  The periods between the
heavier rain events were fairly dry.  The first 17 days of the month only
saw 0.38 inch of precipitation.
 
JULY MONTHLY STATS
DEG. F
AVG MAX.    83.5
AVG MIN.    64.5
MEAN        74.0 [+2.1]
24-HR. MEAN 73.2
Highest 95/17th
Lowest  58/21st
HDD UNITS: 0 [-9]
CDD UNITS: 289 [+67] (changed by +1, 8/2)
CDD SEASON: 439 [+91]
PRECIP Ins.
TOTAL:      3.92
DEPARTURE: -0.10
YEAR 2012: 21.61
DEPARTURE: -9.38
PERCENT OF NORMAL: 70%
WIND: MPH
AVERAGE:              9.2
PREVAILING DIRECTION: SSW 14%
CORRECTED WIND SPEED: 9.8
ASOS:                 9.0
PEAK GUST:            43 NW [7/24] TSTM
PEAK GUST AEROVANE    46 NW [7/24] TSTM
PEAK GUST RMY         46    [7/24] TSTM
FASTEST MILE:         31 ENE [7/18]
SUNSHINE:
TOTAL ASTRONOMICAL MINUTES: 17,532 (292.2 HOURS) OR 63%
TOTAL CAMPBELL-STOKES MINUTES: 16,896 (281.6 HOURS) OR 63%
 
Today's observations:
 
7 A.M.
Weather: Broken altocumulus perlucidus, few stratus, occasional
scattered stratus, thin fog  
Temperature: 70F; Dew Point: 69F; Wind: WSW at 7 kts
Sea-level pressure: 29.88 INS. Hg, rising then rising more slowly    
Visibility: 9 miles 
6-hour min. temp: 67F 
24-hour precip: 0.58 ins.  
BHO SA 1155 E150 BKN 9 118/70/69/2407/988/ FEW STRA OCNL 2 SCT
THN F ALQDS/ 8/630 53009 MANUAL 70058 ASOS 70060 10070 20067 
 
10 A.M.
Weather: Cumulus and moderate cumulus, altocumulus distant E-S, hazy  
Temperature: 79F; Dew Point: 69F; Wind: WSW at 6 kts
Sea-level pressure: 29.88 ins. Hg, steady 
Visibility: 20 miles, hazy    
BHO SA 1455 24 SCT 170 SCT 20 119/79/69/2406/988/ CU/MDT CU FRMG
ALQDS A C DSNT E-S HAYZ/ 8/230 51001 
 
1 P.M.
Weather: Very light rain shower, towering cumulus, cumulus congestus,
few moderate cumulus, cumulonimbus dissipated in vicinity of station SW,
cirrus top dissipating overhead, clear sky distant NNE-E    
Temperature: 78F; Dew Point: 69F; Wind: WSW at 7 kts
Sea-level pressure: 29.87 ins. Hg, falling 
Visibility: 20 miles, hazy
6-hour max. temp: 85F
BHO SA 1755 35 SCT E55 BKN 200 BKN 20RW- 115/78/69/2507/987/
CB DSSPTD VC STN SW DNS CI TOP DSSPTG OVHD TCU ALQDS FEW MDT CU
MSTLY CLR SKY DSNT NNE-E RB42 PCPN VRY LGT/ 8/202 58004 10085 20070
 
 
WEATHER SUMMARY FOR WEDNESDAY, AUGUST 1
 
TEMPERATURE (DEGREES F)
MAX.....82    NORMAL.....81
MIN.....66    NORMAL.....63
MEAN....74    NORMAL.....72
 
DEPARTURE FROM 30-YEAR NORMAL......................+2
TOTAL DEPARTURE FOR THE MONTH.....................+2 [+2.0 DEGREES/DAY]
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............33 W   AT  2:18 P.M.
                   AERO..................33 W   AT  2:18 P.M.
                   ASOS..................33 W   AT  2:18 P.M.
                   DAVIS.................33 W   AT  2:19 P.M. RMY 35
THE FASTEST MILE FOR YESTERDAY...........22 W   AT  2:18 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE............21 W   AT  2:18 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE...........20 W   AT  2:19 P.M.
AVERAGE WIND SPEED AND DIRECTION........8.9 S
                   ASOS.................9.0
                   DAVIS................8.1 SW [220 deg]
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.58   DEPARTURE...........+0.43
                         ASOS..............0.60
TOTAL PRECIPITATION FOR THE MONTH..........0.58   DEPARTURE...........+0.43
                         ASOS..............0.60
TOTAL PRECIPITATION FOR THE YEAR..........22.19   DEPARTURE...........-8.95
                         ASOS.............21.62
 
PRELIMINARY CLIMATE SUMMARY FOR JULY- AUGUST 2012 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane wind recording system gust
RMY:  RMY = R.M. Young wind gust recording system added 8/9/2011
TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized
 
7/1  89/67/78/+8/0.01/676/74        33 WSW AERO 32 MPH WSW RMY 34 TSTM
7/2  84/66/75/+5/T/644/71           23 W   AERO 22 MPH W   RMY 23
7/3  85/63/74/+3/0.00/787/86        23 W   AERO 21 MPH W   RMY 20
7/4  85/66/76/+5/0.37/480/53        20 W   AERO 20 MPH W   RMY 23 TSTM
7/5  81/68/75/+4/0.00/729/80        23 NW  AERO 23 MPH NW  RMY 22
7/6  86/64/75/+4/0.00/753/83        18 SSW AERO 18 MPH SSW RMY 19
7/7  81/69/75/+4/T/224/25           23 W   AERO 23 MPH W   RMY 24
7/8  87/66/77/+5/0.00/814/90        23 W   AERO 23 MPH W   RMY 25
7/9  82/61/72/0/0.00/738/85         22 W   AERO 21 MPH W   RMY 23
7/10 83/61/72/0/0.00/852/98         18 W   AERO 18 MPH W   RMY 18
7/11 84/64/74/+2/0.00/768/88        21 W   AERO 21 MPH W   RMY 23
7/12 89/64/77/+5/0.00/875/97        25 SSW AERO 25 MPH SSW RMY 26
7/13 89/66/78/+6/0.00/604/67        28 S   AERO 27 MPH S   RMY 29
7/14 90/69/80/+8/0.00/521/58        24 W   AERO 22 MPH W   RMY 23
7/15 91/68/80/+8/T/539/60           18 SW  AERO 18 MPH SSW RMY 20
7/16 91/70/81/+9/T/771/86           23 NW  AERO 23 MPH NW  RMY 24
7/17 95/71/83/+11/0.00/831/93       33 SSW AERO 33 MPH SSW RMY 35
7/18 91/69/80/+8/1.45/312/36        40 NE  AERO 39 MPH NE  RMY 41 TSTM
7/19 81/63/72/0/0.00/516/60         21 NNW AERO 18 MPH NNW RMY 18
7/20 70/61/66/-6/0.00/60/7          18 E   AERO 18 MPH E   RMY 19
7/21 77/58/68/-4/0.00/834/97        20 ENE AERO 20 MPH SSE RMY 19
7/22 84/59/72/0/0.00/834/98         24 S   AERO 24 MPH S   RMY 27
7/23 84/63/74/+2/0.02/354/40        27 SSW AERO 29 MPH SSW RMY 29
7/24 88/65/77/+5/0.09/477/54        43 NW  AERO 46 MPH NW  RMY 46 TSTM
7/25 82/59/71/-1/0.00/798/94        30 NW  AERO 31 MPH WNW RMY 31
7/26 82/67/75/+3/T/105/12           23 WSW AERO 23 MPH SW  RMY 25
7/27 73/66/70/-2/0.01/079/09        21 WSW AERO 24 MPH WSW RMY N/A
7/28 79/64/72/0/1.44/402/46         25 NE  AERO 24 MPH NE  RMY 24 TSTM
7/29 69/61/65/-7/T/000/00           22 NE  AERO 21 MPH NE  RMY 22
7/30 82/59/71/-1/0.00/835/96        22 S   AERO 23 MPH S   RMY 24
7/31 76/62/69/-3/0.53/104/12        20 E   AERO 18 MPH E   RMY 19
 
8/1  82/66/74/+2/0.58/.../..        33 W   AERO 33 MPH W   RMY 35
 
8/2 morning low temp: 67F; the normal low is now 63F
 
DAILY RECORDS FOR JULY 2012
None.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR AUGUST 2
HIGH 101F IN 1975 [STATION RECORD MAXIMUM - Tied with 8/10/1949]
LOW 50 IN 1929, 1947
PRECIP 1.59 INCHES IN 1946
PEAK GUST 50 MPH SW IN 2006
 
RECORDS FOR AUGUST 3
HIGH 96F IN 1930
LOW 50F IN 1976
PRECIP 1.45 INCHES IN 1979
PEAK GUST 52 MPH NW IN 2008 [TSTM]
 
TODAY'S REPORT PREPARED BY: Robert Skilling, Jonathan O'Brien,
Mansi Sharma, and William Wilson