Friday, November 9, 2018

| November 9, 2018 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, NOVEMBER 9, 2018
ALL TIMES ARE IN EASTERN STANDARD TIME

A COLD DAY WITH INCREASING CLOUDS AND
FALLING PRESSURE…

On a day that began with mostly clear skies,
the afternoon hours have marked the end of this trend.
Northwesterly winds spanned the day yesterday and
this morning, indicating a return to more
seasonal readings yesterday.  Today’s pattern appears
to bring colder than average temperatures, with a high of
only 48 F reached by the time of the 1 P.M. observation.
The presence of overcast skies may help enforce this value,
however, with wind speeds shifting easterly throughout the day,
there is certainly potential for relatively warm moist
air moving in from the ocean.  Wind speeds have remained modest
throughout the day, but not without notable breezes, with
speeds of 10-20 MPH common throughout the day thus far.
Pressure crested this morning in accordance with the incoming
cloud cover, and continues to fall as of 1 P.M.
PRELIMINARY STATS FOR OCTOBER 2018

TEMPERATURE, Deg. F
Avg. Max. 58.0 [-2.3]
Avg. Min. 42.7 [-0.2]
Mean 50.4 [-1.2]
24-hour corrected mean: 50.2
Max. for month: 82F on the 10th
Min. for month: 27F on the 22nd and 26th

HEATING DEGREE DAYS
Total heating units: 457 [+36]
Total for the season: 544 [-19]
Total for last season: 268

PRECIPITATION, Inches
Total: 5.85 in. [+1.16]
Greatest in 24 hrs: 2.08 inches on October 27

WIND, mph
Avg. uncorrected wind speed: 11.6 mph
Avg. corrected wind speed: 12.0
Prevailing wind direction: W [14% of total hours]
Peak gust and direction: 54 NE

SUNSHINE:
Campbell-Stokes card minutes: 7800 minutes of possible 19824 or 39%
Astronomical total minutes: 8090 minutes of possible 20544 or 39%

Today’s Observations:

7 A.M.
Weather: Few cumulus, few altocumulus, few cirrocumulus,
few cirrus
Temperature: 36F; Dew Point: 29F; Wind: N at 11G13 kts
Sea-level pressure: 30.37 ins. Hg, steady
Visibility: 80 miles
6-hr Max temp: 36F
6-hr Min temp: 34F
24-hr Precip: 0.00 ins.
BHO SA 1155 CLR 80 284/36/29/0111G13/037/
FEW CU FEW AC FEW CC FEW CI 8/199   51011 10036 20034

10 A.M.
Weather: Scattered stratocumulus, few altocumulus
Temperature: 47F; Dew Point: 35F; Wind: ENE at 8G14 kts
Sea-level pressure: 30.34 ins. Hg, falling steadily
Visibility: 70 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 35 SCT 70 275/47/35/0708G14/034/ FEW AC 8/890 58009

1 P.M.
Weather: Overcast stratocumulus
Temperature: 47F; Dew Point: 37F; Wind: E at 7G16 kts
Sea-level pressure: 30.30 ins. Hg, falling steadily
Visibility: 70 miles
6-hr Max temp: 48F
6-hr Min temp: 35F
6-hr Precip: 0.00 ins.
BHO SA 1755 E40 OVC 70 261/47/37/1007G16/030/
8/5// 55014 10048 20035

SUMMARY FOR THURSDAY, NOVEMBER 8, 2018

TEMPERATURE (DEGREES F)
MAX…..52   NORMAL…..53
MIN…..37   NORMAL…..36
MEAN….45   NORMAL…..44

DEPARTURE FROM 30-YEAR NORMAL…………………..+1
TOTAL DEPARTURE FOR THE MONTH………………….+49 [+6.3 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..20   DEPARTURE………-1
TOTAL HEATING UNITS FOR THE MONTH………….116   DEPARTURE……..-42
TOTAL HEATING UNITS FOR THE SEASON…………660   DEPARTURE……..-61
TOTAL HEATING UNITS LAST SEASON TO DATE…….384   DIFFERENCE……+276

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..29 WNW AT 00:02 A.M.
AERO…………………….29 WNW AT 00:02 A.M.
ASOS…………………….29 WNW AT 00:02 A.M.
DAVIS……………………30 NW  AT 00:02 A.M. RMY 32
FASTEST MILE FOR YESTERDAY………………….22 WNW AT 00:01 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….20 WNW AT 00:02 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………21 WNW AT 00:02 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..11.3 WNW
ASOS…………………..11.1
DAVIS………………….11.8 WNW [302 deg.]

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……….3.13  DEPARTURE…….+1.90
ASOS…………..3.23
TOTAL PRECIPITATION FOR THE YEAR……….56.17  DEPARTURE……+11.35
ASOS………….58.09

PRELIMINARY CLIMATE SUMMARY FOR OCTOBER 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

10/01 65/53/59/+2/0.22/042/06         21 ENE AERO 18 SSW RMY N/A
10/02 64/53/59/+2/0.77/000/00         33 S   AERO 32 S   RMY 35 TSTM
10/03 60/52/56/0/0.33/000/00          18 NNE AERO 14 NNE RMY 14
10/04 69/57/63/+7/0.00/209/30         29 SSW AERO 29 SSW RMY 32
10/05 64/47/56/0/0.00/638/92          25 NE  AERO 21 NE  RMY 24
10/06 64/45/55/0/0.00/276/40          23 SSW AERO 23 SSW RMY 25
10/07 75/56/66/+11/0.05/076/11        28 NE  AERO 24 ENE RMY 27
10/08 56/53/55/+1/0.03/000/00         22 ENE AERO 20 ENE RMY N/A
10/09 75/56/66/+12/0.00/211/31        26 WSW AERO 28 SW  RMY 29
10/10 82/65/74/+20/0.00/496/73        24 WSW AERO 23 WSW RMY 25
10/11 70/56/63/+10/0.78/000/00        48 NNE AERO 47 NNE RMY 50
10/12 59/44/52/-1/0.31/182/27         32 NW  AERO 32 NW  RMY 33
10/13 49/40/45/-8/0.17/114/17         21 WNW AERO 20 WNW RMY 20
10/14 55/37/46/-6/0.00/127/19         21 W   AERO 18 W   RMY 21
10/15 66/44/55/+3/0.06/033/05         46 W   AERO 46 W   RMY N/A
10/16 56/41/49/-2/0.03/622/94         48 W   AERO 48 W   RMY N/A
10/17 60/39/50/-1/0.01/587/89         48 W   AERO 50 W   RMY 53
10/18 45/33/39/-12/0.00/657/100       32 WNW AERO 35 WNW RMY 36
10/19 60/31/46/-4/0.00/602/92         33 SSW AERO 36 SSW RMY 36
10/20 62/46/54/+4/0.00/228/35         35 SSW AERO 37 SSW RMY 33
10/21 46/31/39/-11/0.02/363/56        39 NNW AERO 41 NW  RMY 41
10/22 50/27/39/-10/0.00/497/77        24 W   AERO 22 W   RMY 21
10/23 53/40/47/-2/0.51/103/16         29 WNW AERO 29 WNW RMY 29  TSTM
10/24 45/35/40/-9/0.03/096/15         31 NW  AERO 31 NW  RMY 32
10/25 48/32/40/-9/0.00/510/80         35 NW  AERO 35 NW  RMY 36
10/26 45/27/36/-12/0.00/610/96        20 NW  AERO 19 NW  RMY N/A
10/27 48/38/43/-5/2.08/000/00         54 NE  AERO 55 NE  RMY 55
10/28 51/40/46/-2/0.07/000/00         23 NNE AERO 23 NNE RMY N/A TSTM
10/29 55/40/48/+1/0.37/138/22         30 WSW AERO 30 WSW RMY 34
10/30 45/34/40/-7/0.00/306/49         28 NW  AERO 28 NW  RMY 30
10/31 55/32/44/-3/0.01/367/59         35 SSW AERO 36 SSW RMY 37

DAILY RECORDS FOR OCTOBER

10/10/18: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 65F,
BREAKS PREVIOUS RECORD OF 62F SET IN 1949

PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 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

11/01 65/49/57/+11/…./…/..         25 SSW AERO 24 SSW RMY N/A
11/02 65/52/59/+13/…./…/..         37 SSW AERO 41 SSW RMY N/A
11/03 64/42/53/+7/…./…/..          59 W   AERO 60 W   RMY 58
11/04 52/37/45/0/…./…/..           31 W   AERO 30 W   RMY N/A
11/05 49/40/45/0/…./…/..           30 ENE AERO 29 ENE RMY 28
11/06 58/45/52/+7/…./…/..          29 SSW AERO 29 SSW RMY 31
11/07 60/50/55/+10/…./…/..         30 WSW AERO 30 WSW RMY 32
11/08 52/37/45/+1/…./…/..          29 WNW AERO 26 WNW RMY 23

11/09 Low temp since midnight is 34F; normal low is 35F

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

RECORDS FOR NOVEMBER 9
HIGH 72 IN 1975
LOW 17 IN 1971
PRECIP 1.37 INCHES IN 1969
SNOWFALL 0.2 IN 1921,1923
PEAK GUST 73e S IN 1943

RECORDS FOR NOVEMBER 10
HIGH 75 IN 1931
LOW 20 IN 2004
PRECIP 2.11 INCHES IN 1888
SNOWFALL 2.2 IN 1987
PEAK GUST 83e S IN 1942

TODAY’S REPORT PREPARED BY: Nate Iannuccillo

 

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