Monday, December 2, 2013

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, DECEMBER 2, 2013
ALL TIMES ARE IN EASTERN STANDARD TIME

NOVEMBER ENDS COOLER AND DRIER THAN AVERAGE
FINAL WEEK OF MONTH 24-30) AVERAGED 8 DEGREES BELOW NORMAL
2.36 INS PRECIP. 26-27TH ACCOUNTED FOR 66% OF TOTAL
OF 3.59 INS. WHICH WAS 1.17 INS. DRIER THAN AVERAGE

November wound up 2 degrees colder than normal and
over 1 inch drier than normal. A sunny month with
just over 10% more than average sunshine.

THE PRELIMINARY NOVEMBER 2013 STATS
TEMPERATURE
Temp. deg. F
Av. Max. 48.4
Av. Min. 31.2
Mean     39.8 [-1.9] 24-hr corr. mean: 39.7
Max. temp: 68 on 1st
Min. temp: 14 on 25th
Total heating degree day units: 747 [+49] Total heating degree day units for season: 1224 [-37]

PRECIPITATION: Ins.
Total for the month: 3.59 [-1.17] Greatest in 24 hours: 2.36 on 26-27th
Total snowfall for month: 0.2 [-2.1]

WIND:
Avg. wind speed: 13.6 MPH (uncorr.)
Avg. wind speed (corrected) 13.9 MPH
Peak gust: 63 MPH SSE on 27th
Fastest mile: 49 MPH SSE on 27th

SUNSHINE
Astronomical minutes: 10313 or 58% (may need slight correction)
Campbell-Stokes sunshine card minutes: 9966; possible 17010 or 59%
November long-term average is 47%

BAROMETRIC PRESSURE
Maximum sea level pressure preliminary: 30.80 ins. 11/30
(the manual data has yet to be calculated)

Highest November Sea Level Pressure, inches (1885-1895, 1942-present)
1. 30.86 in 1887
2. 30.82 in 1891
3. 30.80 in 1996
30.80 in 2013 (pending review)
5. 30.75 in 1888
30.75 in 1993
7. 30.73 in 1986

Today’s Observations:

7 A.M.
Weather: Obscurement with dense fog
Temperature: 35F; Dew Point: 35F; Wind: NNW at 7 kts
Sea-level pressure: 29.98 ins. Hg, decreasing slightly
Visibility: Zero, variable 1/16 mile
6-hr min temp: 34F
24-hr precip: 0.28 in.
BHO SA 1155 W1 0VF 151/35/35/3407/998/ VSBY 0V1/16/ 8////
58003 MANUAL 70028 ASOS 70028 10035 20034

10 A.M.
Weather: Obscurement with dense fog
Temperature: 36F; Dew Point: 36F; Wind: NW at 3 kts
Sea-level pressure: 29.99 ins. Hg, rising the falling slightly
Visibility: Zero in dense fog
BHO SA 1455 W1 0F 154/36/36/3203/999/ 8//// 50003

1 P.M.
Weather: Obscurement with dense fog
Temperature: 38F; Dew Point: 38F; Wind: NW at 5 kts
Sea-level pressure: 29.95 ins. Hg, falling then more rapidly
Visibility: 1/8 mile, heavy fog
6-hr max. temp: 38F
BHO SA 1755 W2 1/8F 142/38/38/3205/995/ 8//// 58012 10038 20035

WEATHER SUMMARY FOR SUNDAY, DECEMBER 1, 2013

TEMPERATURE (DEGREES F)
MAX…..45    NORMAL…..44
MIN…..30    NORMAL…..29
MEAN….38    NORMAL…..37

DEPARTURE FROM 30-YEAR NORMAL………………….+1
TOTAL DEPARTURE FOR THE MONTH………………….+1 [+1.0 DEGREE/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..27  DEPARTURE………-2
TOTAL HEATING UNITS FOR THE MONTH…………..27  DEPARTURE………-2
TOTAL HEATING UNITS FOR THE SEASON………..1251  DEPARTURE……..-39
TOTAL HEATING UNITS LAST SEASON TO DATE……1185  DIFFERENCE…….+66

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………22 SSE AT  7:46 A.M. *
AERO…………………..23 SSE AT  8:09 A.M. *
ASOS…………………..23 SSE AT  8:09 A.M.
DAVIS………………….23 SSE AT 12:53 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………..18 SSE AT  8:12 A.M. *
MAXIMUM 2-MINUTE ASOS AVERAGE……………..17 SSE AT  8:15 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….18 SE  AT  6:33 A.M.
AVERAGE WIND SPEED AND DIRECTION…………11.0 SSE
ASOS…………………11.0
DAVIS………………..10.0 SE [140 degrees]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M… 0.28  DEPARTURE………….+0.12
ASOS…………..0.28
TOTAL PRECIPITATION FOR THE MONTH……….0.28  DEPARTURE………….+0.12
ASOS…………..0.28
TOTAL PRECIPITATION FOR THE YEAR……….46.88  DEPARTURE………….-1.81
ASOS…………..N/A**
** ASOS malfunctioned during storm on 2/8-9, leading to erroneous totals

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…….0.0     DEPARTURE………….-0.2
TOTAL SNOWFALL FOR THE MONTH………….0.0     DEPARTURE………….-0.2
TOTAL SNOWFALL FOR THE SEASON…………0.2     DEPARTURE………….-2.6

PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER-DECEMBER 2013 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane wind recording system gust
RMY:  RMY = R.M. Young wind gust recording system added 8/9/2011
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized

11/1  68/56/62/+16/0.10/0.0/012/02        60 SSW AERO N/A N/A    RMY 66
11/2  65/49/57/+11/0.00/0.0/296/48        22 WSW AERO N/A N/A    RMY 23
11/3  49/30/40/-6/0.06/T/135/22           23 N   AERO N/A N/A    RMY N/A
11/4  42/27/35/-10/0.00/0.0/588/96        24 NNE AERO N/A N/A    RMY 25
11/5  50/29/40/-5/0.00/0.0/487/80         16 SSW AERO N/A N/A    RMY 17
11/6  59/40/50/+5/0.00/0.0/419/69         30 SSW AERO 31 MPH SSW RMY 33
11/7  65/37/51/+6/0.31/0.0/079/13         33 SW  AERO 37 MPH SW  RMY 37
11/8  48/31/40/-4/T/T/0.0/421/70          37 WNW AERO 37 MPH WNW RMY 39
11/9  44/29/37/-7/0.00/0.0/366/61         25 WNW AERO 25 MPH WNW RMY 29
11/10 52/40/46/+2/0.08/0.0/108/18         31 WNW AERO 33 MPH WNW RMY N/A
11/11 51/36/44/+1/0.00/0.0/500/84         36 WNW AERO 37 MPH WNW RMY 37
11/12 48/24/36/-7/0.11/0.2/000/00         42 SW  AERO 43 MPH SW  RMY 43
11/13 35/21/28/-15/0.00/0.0/591/100       29 NW  AERO 30 MPH NW  RMY 30
11/14 49/26/38/-4/0.00/0.0/536/91         25 SW  AERO 25 MPH SW  RMY 28
11/15 59/38/49/+7/0.00/0.0/393/67         24 S   AERO 25 MPH S   RMY 26
11/16 59/40/50/+8/0.00/0.0/363/62         20 WSW AERO 20 MPH WSW RMY N/A
11/17 59/42/51/+10/0.07/0.0/000/00        23 SSE AERO 25 MPH SSE RMY N/A
11/18 65/46/56/+15/0.28/0.0/400/69        40 SSW AERO 40 MPH S   RMY N/A
11/19 46/28/37/-4/0.00/0.0/428/74         46 WNW AERO 46 MPH WNW RMY 46
11/20 40/25/33/-7/0.00/0.0/565/98         23 NW  AERO 22 MPH NW  RMY 22
11/21 46/26/36/-4/0.00/0.0/460/80         16 SW  AERO 16 MPH SW  RMY N/A
11/22 46/39/43/+3/0.22/0.0/000/00         17 WSW AERO 18 MPH SW  RMY 19
11/23 46/27/37/-2/0.00/0.0/451/79         40 WNW AERO 44 MPH WNW RMY 48
11/24 27/17/22/-17/0.00/0.0/552/97        53 NW  AERO 59 MPH NW  RMY 57
11/25 32/14/23/-16/0.00/0.0/568/100       29 W   AERO 29 MPH WNW RMY N/A
11/26 42/29/36/-2/0.13/T/000/00           25 SW  AERO 27 MPH SW  RMY 28
11/27 61/34/48/+10/2.23/0.0/000/00        63 SSE AERO 68 MPH SSE RMY 67
11/28 35/21/28/-10/0.00/0.0/557/99        43 W   AERO 46 MPH W   RMY 45
11/29 33/19/26/-11/0.00/0.0/527/94        23 NNW AERO 23 MPH NNW RMY 24
11/30 32/15/24/-13/0.00/0.0/510/91        18 SE  AERO 19 MPH SE  RMY N/A

12/1  45/30/38/+1/0.28/T/000/00           22 SSE AERO 23 MPH SSE RMY 23

12/2  morning low temp: 34F; the normal low is now 28F

DAILY RECORDS FOR NOVEMBER 2013
11/27 – NEW RECORD MAXIMUM DAILY PRECIPITATION OF 2.23 INCHES;
surpasses the previous record of 1.92 inches in 1898

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

RECORDS FOR DECEMBER 2
HIGH 61 IN 1998
LOW 3 IN 1890
PRECIP 2.09 INS. IN 1974
SNOWFALL 5.0 INS. IN 1894, 1929
PEAK GUST 89e MPH SSE IN 1942

RECORDS FOR DECEMBER 3
HIGH 67 IN 2009
LOW  -1 IN 1890
PRECIP 2.10 INS. IN 1986
SNOWFALL 6.0 INS. IN 1963
PEAK GUST 73e MPH W IN 1942

TODAY’S REPORT PREPARED BY: Robert Skilling