Monday, November 3, 2014

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, NOVEMBER 3, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME

YESTERDAY’S SNOWFALL OF 1.8 SETS NEW DAILY SNOWFALL
RECORD, WINDS GUST TO 46 MPH

Yesterday’s Nor’easter stuck around just close enough
during yesterday’s morning hours to produce the first
snowfall and sub-freezing temperatures so far this season.
Snow that began falling at 6:50 AM EST continued throughout
the day, falling moderately with fog during the mid morning.
Snow began accumulating to 1.8 inches on the ground before
melting somewhat in the evening.

Yesterday’s previous record:
SNOWFALL 0.2 IN 1906,1951
NEW RECORD 1.8 in 2014

An overnight low, reached just before sunrise of 30F is
the coldest reading so far this season. This is the latest
first freeze since 30F was recorded on 4 November, 2004. The
mean date for the first freeze is 20 October. Extremely clear
conditions have prevailed this morning with visibilities
of 80 miles visible in all directions with gust NW winds.

OCTOBER MONTHLY SUMMARY

The October precipitation total of 9.96 inches ties for the
fourth highest on record with October 2011.

BHO Greatest October Precipitation, inches (1885-2014)

1) 14.72 in 2005
2) 11.76 in 1996
3) 10.84 in 1962
4)  9.96 in 2011
9.96 in 2014
6)  8.89 in 1932
7)  8.12 in 1955

OCTOBER 2014 PRELIMINARY STATS
[Departures are relative to the 1981-2010 normal]

TEMPERATURE [deg. F]

Av. Max. 62.3 [+2.0] Av. Min. 47.2 [+4.3] Mean     54.8 [+3.2] 24-hour corr. mean: 54.4
Max. temp. for month: 79 on 15th
Min, temp. for month: 33 on 20th
Total heating degree day units: 321 [-100] Total seasonal heating   units: 422 [-141] Total cooling degree day units: 8   [+3] Total seasonal cooling   units: 595 [-7]

PRECIPITATION [ins.]

Total: 9.96 [+5.27] Greatest one calendar day: 3.66 [on the 23rd] Greatest in 24 hours 5.15 inches [19E-19E 22nd-23rd]

WIND
Av. wind speed:       12.9 MPH
Av. corr. wind speed: 13.1 MPH
Prevailing direction: W @ 15%

SUNSHINE
Total astronomical minutes: 8988/20548 or 44% of possible
Total Campbell Stokes card minutes: 8664/19824 or 44% of possible

Today’s Observations:

7 A.M.
Weather: Clear, few stratocumulus distant offshore NNE-ESE
Temperature: 32F; Dew Point: 23F; Wind: W at 20G28 kts
Peak Gust: 28 kts W @ 06:47 AM EST
Sea-level pressure: 29.92 ins. Hg, rising, then more slowly
Visibility: 80 miles
6-hr max temp: 33F
6-hr min temp: 30F
24-hr precip: 0.24 inches
24-hr snow: 1.8 inches
BHO SA 1155 CLR 80 131/32/23/2820G28/992/ FEW SC DSNT OFFSHR NNE-ESE
NEW SNW PST 18 HRS TRACE NEW SNW PST 24 HRS 1.8 IN PK WND 2828/47/
8/500 51012 ASOS 70030 MANUAL 70024 10033 20030

10 A.M.
Weather: Clear, few altocumulus distant NE-SE and SSW-WNW
Temperature: 39F; Dew Point: 19F; Wind: WNW at 20G29 kts
Peak Gust: 34 kts N @ 09:34 AM EST
Sea-level pressure: 29.97 ins. Hg, rising, then steady
Visibility: 80 miles
BHO SA 1455 CLR 80 149/39/19/3020G29/997/ FEW AC DSNT NE-SE AND
SSW-WNW PK WND 2934/34/ 8/030 51018

1 P.M.
Weather: Clear, few altocumulus lenticularis distant NW,
few cirrocumulus lenticularis distant S-W
Temperature: 48F; Dew Point: 11F; Wind: WNW at 17G26 kts,
Peak Gust: 30 kts WNW at 12:08 P.M.
Sea-level pressure: 29.97 ins. Hg, steady, then falling slightly
Visibility: 80 miles
6-hr max temp: 48F
6-hr min temp: 32F
6-hr precip: 0.00
BHO SA 1755 CLR 80 148/48/11/2917G26/997/ FEW ACSL DSNT NW FEW CCSL
DSNT S-W PK WND 2930/08/ 8/049 58001 10048 20032

WEATHER SUMMARY FOR SUNDAY, NOVEMBER 2, 2014

TEMPERATURE (DEGREES F)
MAX…..37   NORMAL…..55
MIN…..32   NORMAL…..37
MEAN….35   NORMAL…..46

DEPARTURE FROM 30-YEAR NORMAL……………………-11
TOTAL DEPARTURE FOR THE MONTH……………………-16 [-7.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..30  DEPARTURE……….+11
TOTAL HEATING UNITS FOR THE MONTH…………..54  DEPARTURE……….+16
TOTAL HEATING UNITS FOR THE SEASON…………476  DEPARTURE………-125
TOTAL HEATING UNITS LAST SEASON TO DATE…….488  DIFFERENCE………-12

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………46 NW  AT  6:18 P.M.*
ASOS…………………..49 NW  AT  6:23 P.M.
DAVIS………………….49 NW  AT  6:24 P.M. RMY 49
FASTEST MILE FOR YESTERDAY………………..36 NW  AT  6:22 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..35 NW  AT  6:23 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….34 NW  AT  6:25 P.M.
AVERAGE WIND SPEED AND DIRECTION…………23.3 NW
ASOS…………………21.9
DAVIS………………..19.3 NNW (329 degrees)
* Last of several occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.24  DEPARTURE……..+0.09
ASOS…………..0.30
TOTAL PRECIPITATION FOR THE MONTH……….1.08  DEPARTURE……..+0.77
ASOS…………..1.12
TOTAL PRECIPITATION FOR THE YEAR……….42.63  DEPARTURE……..-1.45
ASOS………….42.99

PRELIMINARY CLIMATE SUMMARY FOR OCTOBER & NOVEMBER CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/RMY 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

10/1  56/55/56/-1/1.63/000/00              33 NE  RMY 36
10/2  55/47/51/-6/0.29/000/00              30 NE  RMY N/A
10/3  54/46/50/-6/0.05/000/00              20 NE  RMY 20
10/4  63/52/58/+2/0.30/000/00              30 SE  RMY 32
10/5  60/45/53/-3/0.00/658/95              26 W   RMY 28
10/6  66/42/54/-1/0.00/669/97              25 SSE RMY N/A
10/7  72/54/63/+8/0.01/261/38   *          43 S   RMY 49
10/8  72/53/63/+9/0.01/562/82              40 S   RMY N/A
10/9  64/48/56/+2/0.00/648/95              35 W   RMY 39
10/10 63/43/53/-1/0.00/489/72              23 W   RMY N/A
10/11 50/43/47/-6/0.35/000/00              15 N   RMY N/A
10/12 60/40/50/-3/0.00/674/100  *          20 NW  RMY N/A
10/13 61/45/53/+0/0.00/054/08              23 S   RMY 25
10/14 75/58/67/+15/0.00/448/67             29 S   RMY 31
10/15 79/62/71/+19/0.02/459/69  #          32 SSW RMY 36
10/16 70/60/65/+14/0.60/000/00             37 S   RMY 41
10/17 71/57/64/+13/0.00/528/80             28 SW  RMY 30
10/18 71/52/62/+11/0.24/210/32             28 WNW RMY 30  TSTM
10/19 55/39/47/-3/0.00/020/03              28 NW  RMY 29
10/20 56/33/45/-5/0.00/515/79              23 SW  RMY 25
10/21 61/49/55/+5/0.16/045/07              17 NNE RMY N/A
10/22 54/48/51/+2/2.38/000/00              58 NE  RMY 58  TSTM
10/23 53/47/50/+1/3.66/000/00              43 N   RMY N/A
10/24 52/43/48/-1/0.16/000/00              25 NNW RMY N/A
10/25 63/41/52/+3/0.00/568/89              21 WSW RMY N/A
10/26 57/43/50/+2/T/337/53                 37 W   RMY 39
10/27 61/42/52/+4/0.00/633/100             26 WNW RMY 31
10/28 70/46/58/+10/0.00/403/64             23 S   RMY 24
10/29 73/47/60/+13/0.10/195/31             25 NNW RMY 27
10/30 59/41/50/+3/0.00/419/67              18 NW  RMY 20
10/31 53/42/48/+1/0.00/193/31              23 NNE RMY N/A

11/1 45/36/41/-5/…./000/00               35 NNE RMY N/A
11/2 37/32/35/-11/…./000/00              46 NW  RMY 49

11/3 morning low temp: 30F since midnight; normal low now 37F

* Sunshine corrected from 281 to 261 on the 7th and from
681 to 674 on the 12th
# Temperature departure corrected from +18 to +19 on the 15th

DAILY RECORDS FOR OCTOBER 2014:
10/1 – A NEW RECORD DAILY PRECIPITATION OF 1.63 INCHES;
surpasses the previous record of 1.44 ins. in 1984

10/22 – A NEW RECORD DAILY PRECIPITATION OF 2.38 INCHES;
surpasses the previous record of 1.37 ins. in 1898

10/23 – A NEW RECORD DAILY PRECIPITATION OF 3.66 INCHES;
surpasses the previous record of 2.18 ins. in 1956

DAILY RECORDS FOR NOVEMBER 2014:
11/2 – A NEW RECORD DAILY SNOWFALL 1.8 INCHES;
surpasses the previous record of 0.2 ins. in 1906, 1951

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

RECORDS FOR NOVEMBER 3
HIGH 75 IN 1990
LOW 21 IN 1891
PRECIP 1.92 INCHES IN 1951
SNOWFALL 0.1 IN 1951
PEAK GUST 96e SSE IN 1951

RECORDS FOR NOVEMBER 4
HIGH 77 IN 1987
LOW 22 IN 1891
PRECIP 3.27 INCHES IN 1910
SNOWFALL 6.4 IN 1945
PEAK GUST 73 WNW IN 1965

TODAY’S REPORT PREPARED BY: Brian Fitzgerald