Friday, September 30, 2016
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, SEPTEMBER 30, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME
ATM. PRESSURE CONTINUES TO RISE,
DRY AIR PREVENTS PRECIP. FROM FALLING YET TODAY
Station pressures continue to rise due to the high pressure region to
our north. The highest pressures for the month so far have occurred
today. A low pressure system moving along the south is set to bring
cloudy skies and showers this weekend. Dry air has held off the
anticipated precipitation through the early afternoon.
As of 1:00PM EST, temperatures had risen to a max. of 58F, compared to
a normal max. of 66F. Today is the third day in a row when temperatures
have not broken 60F.
Visibility had improved from 20 miles this morning to 70 miles in the west
and north by the 1:00PM ob, but distant fog remained east and south limiting
visibility to just 30 miles. Skies were again overcast all morning and early
afternoon with gusty winds out of the NE-ENE.
7 A.M.
Weather: overcast stratocumulus
Temperature: 56F; Dew Point: 51F; Wind: ENE at 13G22 kts
Sea-level pressure: 30.45 ins. Hg, steady then rising
Visibility: 20 miles, distant fog
6-hr Max temp: 56F
6-hr Min temp: 55F
24-hr precip: 0.00 in.
BHO SA 1155 E27 OVC 20 312/56/51/0613G22/045/ DSNT FG ALQDS/
8/6// 53003 10056 20055
10 A.M.
Weather: Overcast stratocumulus
Temperature: 58F; Dew Point: 51F; Wind: ENE at 14G25 kts,
Peak Wind: 28 kts (32 MPH) ENE at 9:36AM EST
Sea-level pressure: 30.44 ins. Hg, rising then falling
Visibility: 20 miles, distant fog
BHO SA 1455 E28 OVC 20 308/58/51/0614G25/044/ DSNT FG ALQDS PK WND 0628/36/
8/5// 58004
1 P.M.
Weather: Overcast stratocumulus
Temperature: 56F; Dew Point: 50F; Wind: NE at 15G22 kts
Sea-level pressure: 30.43 ins. Hg, rising then falling
Visibility: 70 miles, except 30 miles E-WSW, distant fog E-WSW
6-hr Max. temp: 58F
6-hr Min. temp: 56F
BHO SA 1755 E22 OVC 70 305/56/50/0515G22/043/ VSBY E-WSW 30 DSNT FG E-WSW/
8/5// 58003 10058 20056
SUMMARY FOR THURSDAY, SEPTEMBER 29, 2016
TEMPERATURE (DEGREES F)
MAX…..55 NORMAL…..67
MIN…..52 NORMAL…..49
MEAN….54 NORMAL…..58
DEPARTURE FROM 30-YEAR NORMAL……………………-4
TOTAL DEPARTURE FOR THE MONTH…………………..+94 [+3.0 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………0 DEPARTURE……….-1
TOTAL COOLING UNITS FOR THE MONTH………….102 DEPARTURE………+43
TOTAL COOLING UNITS FOR THE SEASON…………894 DEPARTURE……..+298
TOTAL COOLING UNITS LAST SEASON TO DATE…….810 DIFFERENCE……..+84
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..11 DEPARTURE……….+3
TOTAL HEATING UNITS FOR THE MONTH…………..56 DEPARTURE………-53
TOTAL HEATING UNITS FOR THE SEASON………….66 DEPARTURE………-68
TOTAL HEATING UNITS LAST SEASON TO DATE……..42 DIFFERENCE……..+24
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….33 NE AT 12:59 A.M.
ASOS……………………36 NE AT 1:37 A.M.
DAVIS…………………..32 NE AT 1:37 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY…………………23 NE AT 1:47 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………22 NE AT 1:48 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..21 NE AT 1:39 A.M.
AVERAGE WIND SPEED AND DIRECTION………….15.4 NNE
ASOS………………….15.5
DAVIS…………………13.3 NE [045 Deg.]
* Last of several occurrences
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00 DEPARTURE……-0.15
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….2.05 DEPARTURE……-1.86
ASOS…………..2.07
TOTAL PRECIPITATION FOR THE YEAR……….27.02 DEPARTURE…..-11.91
ASOS………….27.34
PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO/RMY GUST
AERO: Aerovane wind recording system gust
RMY: R.M. Young wind gust recording system
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M: Missing data
9/1 72/64/68/0/0.09/000/00 21 NNW AERO 16 NNW RMY 20
9/2 76/58/67/-1/0.00/738/94 23 ENE AERO 17 NE RMY 23
9/3 72/56/64/-3/0.00/368/47 16 E AERO 12 E RMY N/A
9/4 71/58/65/-2/0.00/740/95 28 NE AERO 21 NE RMY 27
9/5 73/57/65/-2/0.52/241/31 42 NNE AER0 33 NNE RMY 43
9/6 70/61/66/-1/0.54/046/06 32 N AERO 23 NNE RMY N/A
9/7 78/66/72/+6/0.05/339/44 21 NE* AERO 15 NE* RMY 21
9/8 79/65/72/+6/T/276/36 22 S AERO 15 S RMY 23
9/9 90/69/80/+14/T/421/55 23 W AERO 24 W RMY 25
9/10 82/71/77/+12/T/229/30 25 S AERO 18 S RMY 32
9/11 79/59/69/+4/0.10/365/48 39 WNW AERO 30 WNW RMY 43
9/12 76/53/65/0/0.00/749/99 18 SW* AERO 13 WNW RMY 19
9/13 81/57/69/+5/0.00/739/98 25 SSW AERO M RMY 26
9/14 87/58/73/+9/T/526/70 35 NNW AERO M RMY 35
9/15 67/52/60/-4/0.00/531/71 21 NE AERO M RMY 20
9/16 74/54/64/+1/0.00/567/76 23 SSE AERO M RMY 24
9/17 77/54/66/+3/0.00/676/91 28 S AERO M RMY 28
9/18 79/63/71/+9/T/133/18 30 SW AERO M RMY 33
9/19 73/67/70/+8/0.16/000/00 25 S AERO M RMY N/A
9/20 81/66/74/+12/0.00/316/43 16 WSW*AERO M RMY N/A
9/21 81/64/73/+12/T/541/74 20 WNW AERO M RMY 18
9/22 82/63/73/+12/0.00/700/96 23 S AERO M RMY 25
9/23 80/53/67/+7/0.16/152/21 32 NE AERO M RMY 32
9/24 66/48/57/-3/0.03/643/89 24 NW AERO M RMY 25
9/25 65/44/55/-5/0.00/698/97 31 NW AERO M RMY 32
9/26 68/43/56/-3/0.00/624/87 25 S AERO M RMY 25
9/27 69/57/63/+4/0.31/021/03 23 S AERO M RMY N/A
9/28 59/52/56/-2/0.08/…/.. 33 NNE AERO M RMY N/A
9/29 55/52/54/-4/0.00/…/.. 33 NE AERO M RMY N/A
9/30 Low temp since midnight is 55F; normal low is now 49F
DAILY RECORDS FOR SEPTEMBER 2016
9/10/16: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 71F,
BREAKS PREVIOUS RECORD OF 69F SET IN 1915, 1931, AND 1989
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR SEPTEMBER 30
HIGH 84F IN 1986
LOW 31F IN 1992
PRECIP 2.44 INCHES IN 2015
PEAK GUST 58 MPH SSE IN 1999
RECORDS FOR OCTOBER 1
HIGH 85F IN 1927
LOW 30F IN 1992
PRECIP 1.63 INCHES IN 2014
PEAK GUST 68e MPH SSE IN 1977
TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle
