Tuesday, December 2, 2014

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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, DECEMBER 2, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME

COLD FRONT MOVES THROUGH MONDAY AFTERNOON,
TEMPS DROP FROM MAX OF 63F TO 30F OVERNIGHT

Yesterday’s unseasonable maximum of 63F was still
7 degrees below the daily record maximum of 70F set
back in 2001. A couple brief showers that began after
3:00 PM EST dropped a quick 0.01 inches of new rain
before ending by 5:00 PM EST.

By this morning an overnight minimum of 30F was reached
with a daytime maximum of 35F reached by the 1:00 PM EST
observation. Skies have remained mostly cloudy or overcast
throughout the morning with good visibility in most directions.

Monthly statistics are being compiled below. Please note some
of these statistics have yet to be finalized. Check back
in the coming days for final monthly statistics or visit
BlueHill.org.

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

TEMPERATURE [deg. F]

Av. Max. 48.0 [-2.0] Av. Min. 32.2 [-1.3] Mean     40.1 [-1.6] 24-hour corr. mean: 40.3
Max. temp. for month: 66 on 5th
Min, temp. for month: 17 on 29th
Total heating degree day units: 737 [+39] Total seasonal heating   units: 1159 [-102]

PRECIPITATION [ins.] Total: 6.21 [+1.45] Greatest one calendar day: 1.77 [26th] Greatest in 24 hours 1.81 [26-27th] Snow: 8.7 [+6.4] Total Season Snow: 8.7 [+6.1]

WIND
Av. wind speed:       13.1 MPH
Av. corr. wind speed: 13.4 MPH
Prevailing direction: W @ 15%

SUNSHINE
Total astronomical minutes: 8114 of 17626 possible, or 46%
Total Campbell Stokes card minutes: 7818 of 17010 possible, or 46%

Today’s Observations:

7 A.M.
Weather: Thin overcast of cirrostratus, few altocumulus
lenticularis in all directions
Temperature: 31F; Dew Point: 18F; Wind: N at 8 kts
Sea-level pressure: 30.65 ins. Hg, rising, then more slowly
Visibility: 70 miles
6-hr max temp: 36F
6-hr min temp: 30F
24-hr precip: 0.01 in.
24-hr snowfall: 0.0 in.
Total snow on ground: 0
BHO SA 1155 E200 -OVC 70 380/31/18/3508/065/
FEW ACSL ALQDS/ 8/047 51030 ASOS 70001 MANUAL 70001 10036 20030

10 A.M.
Weather: Overcast stratocumulus
Temperature: 34F; Dew Point: 19F; Wind: N at 8 kts
Sea-level pressure: 30.70 ins. Hg, rising, then more quickly
Visibility: 60 miles, except 80 miles W-NW
BHO SA 1455 E30 OVC 60 396/34/19/0108/070/
VSBY W-NW 80 MI/ 8/5// 53016

1 P.M.
Weather: Overcast stratocumulus
Temperature: 35F; Dew Point: 26F; Wind: E at 12G18 kts
Sea-level pressure: 30.66 ins. Hg, falling, then more quickly
Visibility: 60 miles, except 70 miles WNW
6-hr max temp: 35F
6-hr min temp: 30F
6-hr precip: 0.00 in.
BHO SA 1755 E26 OVC 60 382/35/26/081218/066/
VSBY WNW 70 MI/ 8/5// 58014 10035 20030

SUMMARY FOR MONDAY, DECEMBER 1, 2014

TEMPERATURE (DEGREES F)
MAX…..63   NORMAL…..44
MIN…..37   NORMAL…..29
MEAN….50   NORMAL…..37

8DEPARTURE FROM 30-YEAR NORMAL……………………+13
TOTAL DEPARTURE FOR THE MONTH…………………….+13 [+12.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..15  DEPARTURE……….-14
TOTAL HEATING UNITS FOR THE MONTH…………..15  DEPARTURE……….-14
TOTAL HEATING UNITS FOR THE SEASON………..1174  DEPARTURE………-116
TOTAL HEATING UNITS LAST SEASON TO DATE……1251  DIFFERENCE………-77

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………28 WNW AT  5:42 P.M.*
ASOS…………………..31 WNW AT  5:42 P.M.
DAVIS………………….30 WNW AT  5:41 P.M. RMY 31
FASTEST MILE FOR YESTERDAY………………..23 WNW AT  4:35 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..22 WNW AT  4:36 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….21 SSW AT  1:19 A.M.
AVERAGE WIND SPEED AND DIRECTION……………14.8 SW
ASOS……………………14.4
DAVIS…………………..13.1 WSW (254 degrees)

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.01  DEPARTURE…..-0.15
ASOS…………..0.01
TOTAL PRECIPITATION FOR THE MONTH……….0.01  DEPARTURE…..-0.15
ASOS…………..0.01
TOTAL PRECIPITATION FOR THE YEAR……….47.77  DEPARTURE…..-0.92
ASOS………….48.20

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……………8.7  DEPARTURE……+5.9

PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER & DECEMBER CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOWFALL/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

11/1  45/36/41/-5/0.79/0.0/000/00              35 NNE RMY N/A
11/2  37/32/35/-11/0.29/1.8/000/00             46 NW  RMY 49
11/3  50/30/45/-6/0.00/0.0/584/95              39 WNW RMY 43
11/4  61/44/53/+8/0.00/0.0/208/34              28 SSW RMY 32
11/5  66/50/58/+13/0.00/0.0/006/01             29 SSW RMY N/A
11/6  52/45/49/+4/0.58/0.0/000/00              23 NE  RMY 24
11/7  46/34/40/-5/0.00/0.0/079/13              39 NW  RMY 42
11/8  47/30/39/-5/0.00/0.0/555/92              24 W   RMY 25
11/9  56/38/47/+3/0.00/0.0/204/34              23 SSW RMY N/A
11/10 58/40/49/+5/0.00/0.0/592/99              17 S   RMY 20
11/11 61/43/52/+9/0.00/0.0/358/60              22 S   RMY 25
11/12 59/40/50/+7/0.00/0.0/095/16              22 W   RMY 25
11/13 49/32/41/-2/0.08/T/450/76                21 NW  RMY N/A
11/14 41/27/34/-8/0.29/3.5/442/75              23 NW  RMY 27
11/15 37/24/31/-11/0.00/0.0/569/97             23 NW  RMY 23
11/16 39/26/33/-9/0.00/0.0/012/02              17 S   RMY 19
11/17 52/34/43/+2/1.67/0.0/000/00              29 ENE RMY 31
11/18 44/23/34/-7/0.00/0.0/494/85              33 W   RMY 39
11/19 35/19/27/-14/0.00/0.0/544/94             31 WSW RMY N/A
11/20 47/26/37/-3/0.00/0.0/542/94              35 WSW RMY 41
11/21 34/22/28/-12/0.00/0.0/569/99             31 WNW RMY 39
11/22 43/20/32/-8/0.00/0.0/…/..              32 SW  RMY 36
11/23 58/40/49/+10/0.00/0.0/…/..             26 SW  RMY N/A
11/24 63/43/53/+14/0.60/0.0/…/..             44 S   RMY 53
11/25 61/44/53/+14/0.00/0.0/…/..             28 SW  RMY 30
11/26 44/31/38/+0/…./…/000/00              41 NE  RMY 46
11/27 36/27/32/-6/…./…/…/..              29 N   RMY N/A
11/28 32/21/27/-11/…./…/…/..             29 WNW RMY 32
11/29 32/17/25/-12/0.00/0.0/…/..             17 S   RMY N/A
11/30 55/30/43/+6/0.00/0.0/…/..              32 SSW RMY 38

12/1  63/37/50/+13/0.01/0.0/…/..             28 WNW RMY 31

12/2 morning low temp: 30F since midnight; the normal low is now 28F

DAILY RECORDS FOR DECEMBER 2014:
None so far.

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
11/14 – DAILY SNOWFALL RECORD EQUALED: 3.5 INCHES;
ties previous record on this date in 1997

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: Brian Fitzgerald