BLUE HILL METEOROLOGICAL OBSERVATORY 
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, JULY 27, 2011  
ALL TIMES ARE IN EASTERN STANDARD TIME
 
MUCH NEEDED RAINFALL FALLS ON SUMMIT;
TEMPERATURES WARM, DEW POINTS INCREASE
 
YESTERDAY'S SEVERE WEATHER REMAINS WELL WEST
AND SOUTHWEST OF THIS AREA
BRIEF LIGHT SHOWER LEAVES ONLY 0.02 INCH
AS WARM, DRY JULY CONTINUES
 
Severe weather yesterday brought considerable
wind damage from straight-line thunderstorm
winds from Chicopee to Monson and Wilbraham
along with many reports of large hail and
flooding rainfall.  The strong storm activity
moved east-southeast and remained well southwest
of Blue Hill.  A light rain shower depositing
just 0.02 inch between 6 and 7 PM EDT was all
that was left of the storms.  South winds gusts
reached a peak of 42 MPH at 6:45 PM EDT
 
July continues warm and dry with temperatures
averaging 3 degrees above normal and rainfall
totaling close to one inch below normal. 
 
Below is the listing of our warmest Julys: 
Warmest July Corrected Mean Temperature (deg F)
(also warmest for all months of the year)
1) 75.1 in 2010
2) 74.9 in 1952
3) 74.1 in 1994
4) 73.8 in 1999
5) 73.5 in 1949
 
Today's observations:
 
7 A.M.  
Weather: Clear, light distant haze [SKC]
Temperature: 67F, Dew point: 61F; Wind: W at 6 kts
Sea-level pressure: 29.83 inches Hg, rising 
Visibility: 55 miles, 60 miles NW
6-hour min. temp: 61F
24-hour precip: 0.02 inch
BHO SA 1155 CLR 55 102/67/61/2606/983/ SKC VSBY NW 60 LGT DSNT HZ/
51020 MANUAL 70002 ASOS 70001 10066 20061
 
10 A.M.
Weather: Scattered, moderate cumulus all quadrants
Temperature: 75F, Dew Point: 61F;  Wind: W at 5 kts
Sea-level pressure: 29.85 inches Hg, rising
Visibility: 60 miles, 70 miles NW
BHO SA 1455 40 SCT 60 109/75/61/2805/985/ MDT CU ALQDS VSBY NW 70/
8/200 51007
 
1 P.M.
Weather: Broken cumulus/moderate cumulus, broken altocumulus,
patch altocumulus distant NE
Temperature: 77F, Dew Point: 61F;  Wind: WNW at 3 kts,
Wind: Light
Sea-level pressure: 29.86 inches Hg, rising
Visibility: 70 miles, light distant haze 
6-hour max. temp: 80F 
BHO SA 1755 E50 BKN 70 BKN 70 112/77/61/3003/986/
CU/MDT CU ALQDS XCPT DSNT NE-E AC DSNT NE
DSNT LGT HZ WND LGT/ 8/230 51003 10080 20067
 
WEATHER SUMMARY FOR TUESDAY, JULY 26
 
TEMPERATURE (DEGREES F)
MAX.....80    NORMAL.....82
MIN.....62    NORMAL.....63
MEAN....71    NORMAL.....72
 
DEPARTURE FROM 30-YEAR NORMAL...................-1
TOTAL DEPARTURE FOR THE MONTH...................+80 [+2.9 DEGREES/DAY]
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..............33 S AT  6:00 P.M.
                   AEROVANE...............42 S AT  5:45 P.M.
                   ASOS...................37 S AT  6:38 P.M.
                   DAVIS..................35 S AT  5:46 P.M.
THE FASTEST MILE FOR YESTERDAY............26 S AT  6:26 P.M.*
MAXIMUM 2-MINUTE ASOS AVERAGE.............25 S AT  8:07 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE............27 S AT  6:06 P.M.
AVERAGE WIND SPEED AND DIRECTION........8.8 S
                   ASOS.................8.4
                   DAVIS................8.0 S [178 deg]
*last of several occurrences
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.02  DEPARTURE.........-0.10
                         ASOS..............0.01  
TOTAL PRECIPITATION FOR THE MONTH..........2.24  DEPARTURE.........-0.90
                         ASOS..............2.17
TOTAL PRECIPITATION FOR THE YEAR..........29.55  DEPARTURE.........+0.74
                        ASOS..............30.04**
**ASOS data is in error due to system failure on 1/12-13
 
PRELIMINARY CLIMATE SUMMARY FOR JULY 2011 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  78/59/69/-1/0.01/530/58         15 WNW 
7/2  80/61/71/+1/0.00/603/66         17 SE
7/3  79/64/72/+2/0.02/018/02         22 S
7/4  86/68/76/+6/0.00/583/64         18 SW
7/5  89/66/78/+7/0.00/784/86         15 S
7/6  88/68/78/+7/T/792/87            30 WNW AERO 35 MPH TSTM
7/7  86/67/77/+6/0.00/481/53         17 WNW
7/8  74/65/70/-1/0.47/027/03         16 ESE TSTM
7/9  81/63/72/+1/0.11/698/77         29 WNW  
7/10 83/59/71/0/0.00/860/95          21 SSW
7/11 89/65/77/+5/0.00/814/90         23 S
7/12 90/72/83/+9/0.00/777/86         25 W
7/13 85/61/73/+1/0.73/469/52         21 NE
7/14 70/58/64/-8/0.37/801/89         28 NNE TSTM 
7/15 79/59/69/-3/0.00/692/77         17 SSW TSTM 
7/16 85/61/73/+1/0.00/834/93         15 SW
7/17 88/67/78/+6/0.00/797/89         30 SSW
7/18 84/70/77/+5/0.02/188/21         38 WSW AERO 43 MPH
7/19 86/69/78/+6/0.00/777/87         18 WNW AERO 24 MPH
7/20 88/69/79/+7/0.00/766/86         29 SSW
7/21 93/68/81/+9/0.00/685/77         37 SSW AERO 43 MPH
7/22 99/76/88/+16/0.00/852/96        28 W   AERO 36 MPH
7/23 90/68/79/+7/0.05/469/53         25 WNW
7/24 80/63/72/-1/0.03/274/31         20 NW  AERO 27 MPH
7/25 74/59/67/-6/0.34/123/14         16 ESE
7/26 80/62/71/-1/0.09/237/27         33 S   AERO 42 MPH
 
7/27 morning low 61F; normal low is 63F
 
DAILY RECORDS FOR JULY 2011
7/22 - RECORD HIGH MAXIMUM TEMPERATURE OF 99F;
ties the previous record of 99F set in 1926
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR JULY 27
HIGH 95F IN 1949, 1963
LOW 50F IN 1920, 2001
PRE 4.01 INS IN 1979
WIND 47 MPH ENE IN 1984
 
RECORDS FOR JULY 28
HIGH 97F IN 1931
LOW 49F IN 1903
PRECIP 3.32 INCHES IN 1911
PEAK GUST 62 MPH SW IN 2006
 
TODAY'S REPORT PREPARED BY: Robert Skilling/Erin Abbott