Monday, September 4, 2017

BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, SEPTEMBER 4, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME

SOUTHWEST WINDS BRING WARMER WEATHER

An additional 0.11 inches of rain fell after 1:00PM EST
yesterday, making the storm total 0.24 inches.  Temps.
rose to just 63F yesterday afternoon which made the day
9F below normal.  Winds became southwesterly yesterday
evening and have remained out of that direction through
afternoon today.

The southwest winds have brought warmer conditions and
distant haze. The max. temp. by 1:00PM today was 77F.
Visibility reached only 40 miles at the 7:00AM observation
and decreased from there.

 

PRELIMINARY STATS FOR AUGUST 2017

TEMPERATURE, Deg. F
Avg. Max. 80.1 [+0.9] Avg. Min. 61.4 [-0.4] Mean      70.8 [+0.3] 24-hour corrected mean: 69.7
Max. for month: 89F on 19th
Min. for month: 55F on 26th, 27th, and 31st

COOLING DEGREE DAYS
Total cooling units: 186 [0] Total for the season: 607 [+70] Total for last season: 792

HEATING DEGREE DAYS
Total heating units: 2 [-14] Total for the season: 26 [+2] Total for last season: 10

PRECIPITATION, Inches
Total: 1.60 [-2.43] Greatest in 24 hrs: 1.09 on the 2nd

WIND, mph
Avg. uncorrected wind speed: 9.3
Avg. corrected wind speed: 10.0
Prevailing wind direction: S at 18%
Peak gust and direction: 33 S on 18th

SUNSHINE:
Campbell-Stokes card minutes: 16,080 minutes of possible 24,780 or 65%
Astronomical total minutes: 16,694 minutes of possible 25,731 or 65%

 

Today’s Observations:

7 A.M.
Weather: Few cirrus in all directions
Temperature: 58F; Dew Point: 55F; Wind: WSW at 13G19 kts
Sea-level pressure: 29.91 ins. Hg, rising unsteadily
Visibility: 40 miles, distant fog in all directions
6-hr Max temp: 58F
6-hr Min temp: 56F
24-hr Precip: 0.16 inches
BHO SA 1155 CLR 40 128/58/55/2513G19/991/ FEW CI ALQDS DSNT FG
ALQDS/ 8/001 52023 MANUAL 70016 ASOS 70018 10058 20056

10 A.M.
Weather: Few cumulus in all directions, broken cirrus
Temperature: 68F; Dew Point: 56F; Wind: W at 11G18 kts
Sea-level pressure: 29.92 ins. Hg, rising then falling
Visibility: 35 miles, distant haze in all directions
BHO SA 1455 E250 BKN 35 131/68/56/2611G18/992/ FEW CU ALQDS
DSNT HZ ALQDS/ 8/101 50003

 

1 P.M.
Weather: Few cumulus W-NNW, broken cirrus
Temperature: 76F; Dew Point: 55F; Wind: WSW at 12G17 kts
Sea-level pressure: 29.89 ins. Hg, falling, then more quickly
Visibility: 20 miles, distant haze in all directions
6-hr Max temp: 77F
6-hr Min temp: 57F
BHO SA 1755 E250 BKN 20 122/76/55/2512G17/989/ FEW CU W-NNW
DSNT HZ ALQDS/ 8/101 58009 10077 20057

 

SUMMARY FOR SUNDAY, SEPTEMBER 3, 2017

TEMPERATURE (DEGREES F)
MAX…..63   NORMAL…..76
MIN…..52   NORMAL…..59
MEAN….58   NORMAL…..67

DEPARTURE FROM 30-YEAR NORMAL…………………….-9
TOTAL DEPARTURE FOR THE MONTH……………………-28 [-9.5 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………0   DEPARTURE……….-4
TOTAL COOLING UNITS FOR THE MONTH……………0   DEPARTURE………-11
TOTAL COOLING UNITS FOR THE SEASON…………607   DEPARTURE………+59
TOTAL COOLING UNITS LAST SEASON TO DATE…….797   DEPARTURE……..-190

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………7   DEPARTURE……….+6
TOTAL HEATING UNITS FOR THE MONTH…………..20   DEPARTURE………+16
TOTAL HEATING UNITS FOR THE SEASON………….46   DEPARTURE………+17
TOTAL HEATING UNITS LAST SEASON TO DATE……..11   DEPARTURE………+35

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….33 W AT 5:38 P.M.
AERO……………………33 W AT 5:37 P.M.
ASOS……………………34 W AT 5:35 P.M.
DAVIS…………………..32 W AT 5:28 P.M. RMY 37
FASTEST MILE FOR YESTERDAY…………………25 W AT 5:37 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………25 W AT 5:39 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..25 W AT 5:32 P.M.
AVERAGE WIND SPEED AND DIRECTION………….12.5 ESE
ASOS………………….12.2
DAVIS…………………10.5 SSE [160 DEG.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.16  DEPARTURE……+0.04
ASOS…………..0.18
TOTAL PRECIPITATION FOR THE MONTH……….0.24  DEPARTURE……-0.10
ASOS…………..0.27
TOTAL PRECIPITATION FOR THE YEAR……….36.60  DEPARTURE……+1.24
ASOS……………N/A ***
*** ASOS annual total not available due to erroneous readings

 

PRELIMINARY CLIMATE SUMMARY FOR AUGUST 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

8/1  87/65/76/+4/0.00/762/88               16 ESE*AERO 16 NNW RMY 16
8/2  86/65/76/+4/1.09/372/43               32 W   AERO 36 W   RMY 34 TSTM
8/3  83/65/74/+2/0.00/552/64               22 S   AERO 23 S   RMY 24
8/4  84/66/75/+3/0.00/697/81               26 S   AERO 30 S   RMY 29
8/5  75/63/69/-3/0.10/060/07               23 NW  AERO 28 NW  RMY 29
8/6  76/57/67/-5/0.00/795/93               30 NW  AERO 32 NW  RMY 31
8/7  76/60/68/-4/0.01/597/70               28 SSW AERO 28 SSW RMY 29
8/8  74/60/67/-5/0.02/000/00               17 S   AERO 16 SSE RMY 16
8/9  83/58/71/-1/0.00/831/98               18 S   AERO 18 S   RMY 19
8/10 86/63/75/+4/T/643/76                  20 S   AERO 18 S   RMY 20
8/11 82/63/73/+2/0.00/666/79               17 S   AERO 16 S   RMY 17
8/12 75/57/66/-5/0.17/294/35               22 SSW*AERO 22 SSW RMY 23
8/13 84/67/76/+5/0.00/796/95               26 WNW AERO 24 WNW RMY 26
8/14 82/67/75/+4/0.00/359/43               14 SSW*AERO 14 S   RMY 15
8/15 79/64/72/+1/T/058/07                  21 S   AERO 21 S   RMY 23
8/16 83/64/74/+3/0.00/731/88               23 NW* AERO 23 NW  RMY 25
8/17 81/58/70/-1/0.00/745/90               15 SSW AERO 14 SSW RMY N/A
8/18 79/63/71/0/0.01/025/03                33 S   AERO 35 S   RMY 35
8/19 89/65/77/+7/0.00/502/61               23 WSW AERO 23 WSW RMY 25
8/20 84/66/75/+5/0.00/804/98               23 NW  AERO 25 NW  RMY 27
8/21 85/63/74/+5/0.00/687/84               18 SW  AERO 20 SW  RMY 20
8/22 88/68/78/+8/0.00/481/59               31 S   AERO 35 S   RMY 34
8/23 83/64/74/+4/0.04/642/79               24 WNW*AERO 25 WNW RMY 27
8/24 80/59/70/0/0.00/778/96                18 WNW*AERO 17 WNW RMY 21
8/25 75/57/66/-3/T/597/74                  21 NW  AERO 21 NW  RMY 23
8/26 75/55/65/-4/0.00/733/91               16 WNW AERO 16 SSE RMY 17
8/27 75/55/65/-4/0.00/770/96               17 ENE*AERO 16 ENE*RMY 18
8/28 74/56/65/-4/0.00/727/91               17 ENE AERO 16 ENE*RMY 18
8/29 68/57/63/-6/0.01/016/02               18 ENE AERO 16 ENE RMY N/A
8/30 72/57/65/-3/0.15/468/59               22 NNE AERO 21 NNE RMY 23
8/31 79/55/67/-1/0.00/506/64               23 NW  AERO 24 NW  RMY 27

DAILY RECORDS FOR AUGUST

None.

 

PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/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/…/..              26 WNW AERO 28 WNW RMY 31
9/2  72/46/59/-9/0.00/…/..               18 NNW AERO 18 NNW RMY 21
9/3  63/52/58/-9/…./…/..               33 W   AERO 33 W   RMY 37

9/4  Low temp since midnight is 55F; normal low is now 59F

DAILY RECORDS FOR SEPTEMBER

9/1/17: DAILY RECORD LOW MINIMUM TEMPERATURE OF 47F,
TIES PREVIOUS RECORD SET IN 1975

 

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):

RECORDS FOR SEPTEMBER 4
HIGH 90F IN 1953, 1973
LOW 46F IN 1987
PRECIP 3.22 INCHES IN 1922
PEAK GUST 47 MPH SE IN 1966

RECORDS FOR SEPTEMBER 5
HIGH 90F IN 1971
LOW 45F IN 1906
PRECIP 1.37 INCHES IN 1907
PEAK GUST 46 MPH NW IN 1994

TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle