Wednesday, September 27, 2017
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, SEPTEMBER 27, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME
NEW RECORD HIGH TEMPERATURE FOR TODAY
Temperatures had reached 85F by 1:00PM which breaks the previous record
for today of 84F first set in 1998. With partly cloudy skies, it is
still possible for temperatures to rise a degree or two more. South-
westerly winds allowed for moist air to remain over the region and
increase dew points into the low 70s this afternoon. Visibility was
60 miles in the afternoon despite distant haze.
Today’s Observations:
7 A.M.
Weather: Few stratus E-SW, few altostratus in all directions
Temperature: 67F; Dew Point: 64F; Wind: WNW at 5 kts,
Wind speed: Light
Sea-level pressure: 29.97 ins. Hg, steady then rising
Visibility: 40 miles, distant fog in all directions
6-hr Max temp: 68F
6-hr Min temp: 64F
24-hr precip: 0.00 in.
BHO SA 1155 CLR 40 150/67/64/2005/997/ FEW ST E-SW FEW AS ALQDS
DSNT FG ALQDS WND LGT/ 8/610 53003 10068 20064
10 A.M.
Weather: Scattered cumulus, scattered altostratus
Temperature: 79F; Dew Point: 72F; Wind: SW at 6 kts,
Wind speed: Light
Sea-level pressure: 29.94 ins. Hg, falling, then more quickly
Visibility: 50 miles
BHO SA 1455 39 SCT 100 SCT 50 139/79/72/2206/994/ WND LGT/ 8/110
58011
1 P.M.
Weather: Scattered cumulus, scattered altocumulus
Temperature: 85F; Dew Point: 71F; Wind: SSW at 9G14 kts
Sea-level pressure: 29.89 ins. Hg, falling, then more quickly
Visibility: 60 miles, distant haze in all directions
6-hr Max temp: 85F
6-hr Min temp: 67F
BHO SA 1755 39 SCT 100 SCT 60 121/85/71/219G14/989/ DSNT HZ ALQDS/
8/130 58018 10085 20067
SUMMARY FOR TUESDAY, SEPTEMBER 26, 2017
TEMPERATURE (DEGREES F)
MAX…..84 NORMAL…..68
MIN…..66 NORMAL…..51
MEAN….75 NORMAL…..59
DEPARTURE FROM 30-YEAR NORMAL……………………+16
TOTAL DEPARTURE FOR THE MONTH……………………+72 [+2.6 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..10 DEPARTURE……….+9
TOTAL COOLING UNITS FOR THE MONTH…………..90 DEPARTURE………+33
TOTAL COOLING UNITS FOR THE SEASON…………697 DEPARTURE……..+103
TOTAL COOLING UNITS LAST SEASON TO DATE…….894 DEPARTURE……..-197
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………0 DEPARTURE……….-7
TOTAL HEATING UNITS FOR THE MONTH…………..42 DEPARTURE………-45
TOTAL HEATING UNITS FOR THE SEASON………….68 DEPARTURE………-44
TOTAL HEATING UNITS LAST SEASON TO DATE……..44 DEPARTURE………+24
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….15 SW AT 10:32 P.M.
AERO……………………12 SW AT 10:32 P.M.*
ASOS……………………15 SW AT 10:32 P.M.
DAVIS…………………..13 SSW AT 10:35 P.M. RMY 14
FASTEST MILE FOR YESTERDAY…………………12 SW AT 10:33 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………13 SSW AT 10:36 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..11 SSW AT 9:53 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..4.3 S
ASOS…………………..4.3
DAVIS………………….2.5 SSW [208 DEG.]
*last of multiple 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……….3.17 DEPARTURE……-0.30
ASOS…………..3.24
TOTAL PRECIPITATION FOR THE YEAR……….39.53 DEPARTURE……+1.04
ASOS……………N/A ***
*** ASOS annual total not available due to erroneous readings
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 68/47/58/-10/0.00/749/95 26 WNW AERO 28 WNW RMY 31
9/2 72/46/59/-9/0.00/542/69 18 NNW AERO 18 NNW RMY 21
9/3 63/52/58/-9/0.24/000/00 33 W AERO 33 W RMY 37
9/4 79/55/67/0/0.00/702/90 29 SSW AERO 28 SSW RMY N/A
9/5 84/62/73/+6/0.00/583/75 36 S AERO 32 S RMY 38
9/6 76/59/68/+1/0.49/070/09 28 S AERO 28 S RMY 30 TSTM
9/7 74/58/66/0/0.79/417/54 24*WSW AERO 23 WSW RMY 24
9/8 74/53/64/-2/0.00/577/75 21 WSW AERO 18 WSW RMY 22
9/9 68/51/60/-5/T/620/81 18 ENE AERO 16 ENE RMY 18
9/10 71/51/61/-4/0.00/694/91 18 NW AERO 16 NW RMY N/A
9/11 78/50/64/-1/0.00/692/91 20 NNW AERO 17 NNW RMY 20
9/12 84/58/71/+6/0.00/690/91 22 WSW AERO 18 WSW RMY 23
9/13 84/59/72/+8/T/680/90 18 WSW AERO 15 WSW RMY 20 TSTM
9/14 82/66/74/+10/0.00/233/31 23 SW AERO 23 WSW RMY 25 TSTM
9/15 83/66/75/+11/0.05/300/40 18 WNW AERO 15 WNW RMY 18
9/16 78/65/72/+9/T/261/35 14 E AERO 9 E RMY 12
9/17 79/61/70/+7/T/334/45 15 SSE AERO 14 SSE RMY 15
9/18 67/62/65/+3/0.02/000/00 21 NE AERO 18 NE RMY N/A
9/19 63/61/62/0/0.13/000/00 28 NE* AERO 25 NNE RMY N/A
9/20 68/62/65/+3/0.37/000/00 41 NNE AERO 44 NNE RMY 45
9/21 69/60/65/+4/0.00/242/33 47 NNE AERO 44 NNE RMY 50
9/22 60/54/57/-4/0.57/…/.. 40 NNE AERO 38 NNE RMY N/A
9/23 74/59/67/+7/0.12/…/.. 29 NNE AERO 29 NNE RMY N/A
9/24 85/63/74/+14/0.00/…/.. 16 N AERO 14 N* RMY N/A
9/25 86/66/76/+16/0.00/…/.. 15 ESE*AERO 13 ESE RMY 14
9/26 84/66/75/+16/0.00/…/.. 15 SW AERO 12 SW* RMY 14
9/27 Low temp since midnight is 64F; normal low is now 50F
DAILY RECORDS FOR SEPTEMBER
9/1/17: DAILY RECORD LOW MINIMUM TEMPERATURE OF 47F,
TIES PREVIOUS RECORD SET IN 1975
9/27/17: DAILY RECORD HIGH MAXIMUM TEMPERATURE OF 85F (through 13E),
BREAKS PREVIOUS RECORD SET IN 1998 AND TIED IN 2014
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR SEPTEMBER 27
HIGH 84F IN 1998,2014
LOW 32F IN 1947
PRECIP 2.26 INCHES IN 1962
PEAK GUST 100 MPH SSE IN 1985 (HURRICANE GLORIA)
RECORDS FOR SEPTEMBER 28
HIGH 86F IN 2014
LOW 33F IN 1897,1947
PRECIP 2.46 INCHES IN 2004
PEAK GUST 69 MPH NE IN 1962
TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle
