BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, AUGUST 26, 2011
ALL TIMES ARE IN EASTERN STANDARD TIME
FRONT BRINGS ADDITIONAL RAINFALL OVERNIGHT;
PLENTY OF SUN WITH SLIGHTLY DRIER AIR MASS TODAY
A cold front pushed through the area overnight, bringing a few
showers and a slightly drier air mass. Rainfall of 0.16 inch
occurred late last night into early this morning. Also, as the front
passed through the wind direction shifted from southerly to westerly,
and the temperature dropped by about 6 degrees in an hour's time.
With a west wind continuing today, a slightly drier air mass has
entered the region with dew points in the mid 60s compared to 70-degree
dew points yesterday.
The 0.16 inch of rain overnight brings the total for August up to
6.38 inches. With heavy amounts of rain in the forecast from Irene,
August 2011 is likely to enter into the top 10 wettest Augusts on
record at Blue Hill. Below are the top 10 wettest Augusts on record
at Blue Hill as they stand now.
WETTEST AUGUSTS (inches)
1) 18.78 1955
2) 11.44 1946
3) 10.72 1927
4) 8.92 1976
5) 8.68 2010
6) 8.58 1917
7) 8.00 1924
8) 7.72 1975
9) 7.48 1936
10) 7.39 1919
Today's observations:
7 A.M.
Weather: Scattered altocumulus, few cumulus/cumulus fractus distant
ESE-S, fog/stratus layer distant WSW-N, altocumulus/altocumulus
lenticularis distant ENE-S-W, thin fog/haze
Temperature: 69F, Dew point: 67F; Wind: W at 6 kts,
Sea-level pressure: 30.00 inches Hg, rising
Visibility: 25 miles, thin fog/haze, WNW 50 miles above fog/stratus
24-hour precip: 0.16 inch
6-hour min. temp: 66F
BHO SA 1155 90 SCT 25 158/69/67/2606/000/ FEW CU/CUFRA DSNT ESE-S
FG/STRA LYR DSNT WSW-N AC/ACSL DSNT ENE-S-W THN FG/HZ VSBY WNW 50
ABV FG/STRA LYR/ 8/640 51014 MANUAL 70016 ASOS 70015 10069 20066
10 A.M.
Weather: Scattered cumulus, scattered altocumulus, small cumulus/
cumulus fractus forming distant ESE-S and distant SW-NW-NNE,
altocumulus/altocumulus lenticularis distant ESE-SW, thin smoke
layer distant WSW-N-ENE, light distant haze
Temperature: 77F, Dew Point: 67F; Wind: NW at 4 kts,
Wind: light and variable
Sea-level pressure: 30.01 inches Hg, rising
Visibility: 50 miles, light distant haze
BHO SA 1455 40 SCT 90 SCT 50 164/77/67/3204/001/ SML CU/CUFRA FRMG
DSNT ESE-S AND DSNT SW-NW-NNE AC/ACSL DSNT ESE-SW THN K LYR DSNT
WSW-N-ENE LGT DSNT HZ WND LGT AND VRB/ 8/140 51006
1 P.M.
Weather: Scattered cumulus, scattered altocumulus, few cumuluf fractus
all quadrants, few moderate cumulus ESE-SSE and SW-W and N, lone
altocumulus lenticularis SE, thin smoke/haze layer distant NNE-E,
light distant haze all quadrants
Temperature: 82F, Dew Point: 65F; Wind: W at 4 kts,
Wind: light and variable
Sea-level pressure: 30.00 inches Hg, rising
Visibility: 50 miles, light distant haze
6-hour max. temp: 83F
BHO SA 1755 40 SCT 80 SCT 50 159/82/65/2804/000/ FEW CUFRA ALQDS FEW
MDT CU ESE-SSE AND SW-W AND N LONE ACSL SE THN K/HZ LYR DSNT NNE-E
LGT DSNT HZ ALQDS WND LGT AND VRB/ 8/240 56005 10083 20069
WEATHER SUMMARY FOR THURSDAY, AUGUST 25
TEMPERATURE (DEGREES F)
MAX.....83 NORMAL.....77
MIN.....65 NORMAL.....59
MEAN....74 NORMAL.....68
DEPARTURE FROM 30-YEAR NORMAL.....................+6
TOTAL DEPARTURE FOR THE MONTH....................+24 [+0.8 DEGREES/DAY]
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..............36 SSW AT 12:28 P.M.
AEROVANE...............44 SSW AT 12:31 P.M. *
ASOS...................39 SW AT 12:29 P.M.
DAVIS..................38 SSW AT 12:28 P.M. RMY:39
THE FASTEST MILE FOR YESTERDAY............28 SSW AT 12:28 P.M. *
MAXIMUM 2-MINUTE ASOS AVERAGE.............29 SSW AT 11:58 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE............27 S AT 11:58 P.M.
AVERAGE WIND SPEED AND DIRECTION........18.0 S
ASOS.................17.4
DAVIS................16.6 S [178 deg]
*last of several occurrences...
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.16 DEPARTURE.........+0.03
ASOS..............0.15
TOTAL PRECIPITATION FOR THE MONTH..........6.38 DEPARTURE.........+3.16
ASOS..............6.39
TOTAL PRECIPITATION FOR THE YEAR..........36.07 DEPARTURE.........+3.44
ASOS..............36.57**
**ASOS data is in error due to system failure on 1/12-13
PRELIMINARY CLIMATE SUMMARY FOR AUGUST 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
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
8/1 91/69/80/+8/T/503/58 24 S
8/2 88/63/76/+4/0.15/657/76 27 NNE AERO 34 MPH TSTM
8/3 76/59/68/-4/0.00/673/78 18 ENE AERO 25 MPH
8/4 77/62/70/-2/0.00/783/91 20 NE
8/5 78/61/70/-2/0.00/575/67 20 SE
8/6 85/66/76/+4/0.01/265/31 22 SSW AERO 28 MPH
8/7 73/67/70/-1/1.09/000/00 33 SSE AERO 39 MPH
8/8 80/70/75/+4/0.26/332/39 15 NNW
8/9 77/64/71/0/0.82/433/51 29 ESE AERO 36 MPH RMY 32 MPH TSTM **
8/10 79/61/70/-1/1.15/364/43 18 W AERO 21 MPH RMY 18 MPH
8/11 79/61/70/-1/0.00/776/92 24 W AERO 29 MPH RMY 27 MPH
8/12 81/58/70/-1/0.00/817/97 18 WNW AERO 25 MPH RMY 21 MPH
8/13 82/63/73/+2/0.00/512/61 15 SSW AERO 21 MPH RMY 19 MPH
8/14 74/65/70/0/0.04/000/00 21 S AERO 28 MPH RMY 23 MPH
8/15 67/58/63/-7/1.89/000/00 40 NNE AERO 43 NNE RMY 41 MPH
8/16 69/58/61/-6/T/0.09/058/07 21 WNW AERO 24 MPH RMY 19 MPH
8/17 83/61/72/+2/0.00/813/98 20 W AERO 24 MPH RMY 21 MPH
8/18 85/64/75/+5/0.00/.../.. 24 SSW AERO 30 MPH RMY 26 MPH
8/19 85/67/76/+6/T/.../.. 31 W AERO 37 MPH RMY 31 MPH TSTM
8/20 83/67/75/+6/0.01/.../.. 20 SSE AERO 25 MPH RMY 22 MPH
8/21 82/66/74/+5/0.04/.../.. 35 S AERO 42 MPH RMY 36 MPH
8/22 75/60/68/-1/0.67/.../.. 33 W AERO 40 MPH RMY 37 MPH
8/23 77/55/66/-3/0.00/.../.. 20 WSW AERO 24 MPH RMY 21 MPH
8/24 78/61/70/+1/0.00/.../.. 33 S AERO 40 MPH RMY 36 MPH
8/25 83/65/74/+6/..../.../.. 36 SSW AERO 44 MPH RMY 39 MPH
8/26 our morning low temp: 66F; the normal low is now 59F
** please see added line in, "Preliminary Climate Summary"
above regarding the start of wind gust record from the
R.M. Young digital recorder on 8/9
DAILY RECORDS FOR AUGUST 2011
None so far.
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR AUGUST 26
HIGH 96 IN 1900, 1948
LOW 46F IN 1885
PRECIP 5.85 INCHES IN 1924
PEAK GUST 55e MPH NNW IN 1947
RECORDS FOR AUGUST 27
HIGH 99F IN 1948
LOW 44F IN 1885
PRECIP 2.77 INCHES IN 1946
PEAK GUST 48 MPH NW IN 1983
TODAY'S REPORT PREPARED BY: Sean Fankhauser