Monday, January 6, 2014

| January 6, 2014 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, JANUARY 6, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME

A SIGNIFICANT MELTING DAY AHEAD OF ANOTHER COLD SNAP.

With temperatures climbing throughout the night, 0700E on Blue
Hill was balmy, wet and thoroughly in the fog. Drizzle and rain
showers through the night also aided in melting snow on the ground
to approximately 1 inch at 0700E with only patches remaining by
early afternoon. Winds have been gusty as well, with winds gusting
above 40mph consistently for a while this morning.

THE PRELIMINARY DECEMBER 2013 STATS

[Departures are relative to the 1981-2010 averages]

TEMPERATURE: Deg. F
Avg. Max. 38.0 [-1.1]
Avg. Min. 23.7 [+0.1]
Mean      30.9 [-0.4]
24-hr. corrected mean: 30.7
Max. temp: 63F on 22nd
Min. temp: 7F  on 17th
Total heating degree day units: 1053 [+10]
Total seasonal heating units:   2277 [-28 less than average]
[Season starts 7/1]
Seasonal total this date 2012:  2028 [249 more than last season]

PRECIPITATION: Inches
Total: 5.27 [+0.38]
Greatest in 24 hours: 1.43 (14-15th)
Total snowfall: 15.5 [+2.1]
Greatest in 24 hours: 6.8 inches (14-15th)

WIND
Av. speed (uncorrected): 11.9 mph
Av. speed (corrected):   12.3 mph
Prevailing direction: W 15%

SUNSHINE
Total astronomical minutes: 5,772 of possible 17,037 or 34%
Total Campbell Stokes card minutes; 5,574 of possible 16,470 or 34%

PRELIMINARY ANNUAL STATS FOR 2013

TEMPERATURE: Deg. F
Avg. Max. 58.5 [+0.8]
Avg. Min. 41.5 [+1.1]
Mean      50.0 [+0.9]

PRECIPITATION: Inches
Total: 51.87 [-1.55]
Snowfall: 99.3 [+36.6] (Jan-Dec)

Today’s Observations:

7 A.M.
Weather: Fog, light rain showers
Temperature: 54F; Dew Point: 53F; Wind: S at 20G32 kts
Sea-level pressure: 29.57 ins. Hg, falling, then more slowly
Visibility: 1/8 of a mile, thick fog
6-hr. min temp: 42F
Snow cover: 1 inch
BHO SA 1155 W3 X 1/8RW-F 013/54/53/1720G32/957/ PK WND 1734/41/
8//// 4/001 56045 ASOS 60014 MANUAL 600// 70025 10054 20042

10 A.M.
Weather: Fog and light drizzle
Temperature: 55F; Dew Point: 55F; Wind: S at 22G37 kts
Sea-level pressure: 29.45 ins. Hg, steady then falling
Visibility: 1/16 of a mile, thick fog
BHO SA 1455 W2 X 1/16L-F 972/55/55/1722G37/945/ PK WND 1737/55/
8//// 58041 MANUAL 60011/ ASOS 60009

1 P.M.
Weather: Broken altocumulus, overcast cirrostratus, few cumulus
fractus all quadrants.
Temperature: 55F; Dew Point: 55F; Wind: S at 19G22 kts
Sea-level pressure: 29.33 ins. Hg, falling, then steady
Visibility: 25 miles, thin fog
6-hr max. temp: 57F
6-hr precipitation: N/A
BHO SA 1755 E30 OVC 25 931/55/55/1914G22/933/ FEW CUFRA ALQDS THN FG ALQDS
PK WND 1932/02/ 8/127 56041 ASOS 60019 MANUAL 600// 10057 20054

WEATHER SUMMARY FOR SUNDAY, JANUARY 5, 2014

TEMPERATURE (DEGREES F)
MAX…..42    NORMAL…..34
MIN…..23    NORMAL…..18
MEAN….33    NORMAL…..26

DEPARTURE FROM 30-YEAR NORMAL…………………..+7
TOTAL DEPARTURE FOR THE MONTH…………………..-50 [-10.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..32  DEPARTURE……….-7
TOTAL HEATING UNITS FOR THE MONTH………….243  DEPARTURE………+50
TOTAL HEATING UNITS FOR THE SEASON………..2520  DEPARTURE………+23
TOTAL HEATING UNITS LAST SEASON TO DATE……2230  DIFFERENCE…….+249

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………30 SE   AT 11:37 P.M.
AERO…………………..32 SE   AT 11:59 P.M.*
ASOS…………………..42 E    AT 11:59 P.M.
DAVIS………………….30 W    AT  4:11 A.M. RMY 42
FASTEST MILE FOR YESTERDAY………………..24 SSW  AT  4:11 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..24 SSW  AT  4:11 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….24 SSW  AT  4:11 A.M.
AVERAGE WIND SPEED AND DIRECTION…………15.0 SW
ASOS…………………14.6
DAVIS………………..13.7 S [191 deg.]
* LAST OF SEVERAL OCCURRENCES

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.25  DEPARTURE………….+0.11
ASOS…………..0.27
TOTAL PRECIPITATION FOR THE MONTH……….1.60  DEPARTURE………….+0.88
ASOS…………..1.83
TOTAL PRECIPITATION FOR THE YEAR………..1.60  DEPARTURE………….+0.88
ASOS…………..1.83

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……..0.0    DEPARTURE…………..-0.5
TOTAL SNOWFALL FOR THE MONTH………….15.6    DEPARTURE………….+12.8
TOTAL SNOWFALL FOR THE SEASON…………31.2    DEPARTURE………….+12.8

PRELIMINARY CLIMATE SUMMARY FOR DECEMBER-JANUARY 2013-2014 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

12/1  45/30/38/+1/0.28/T/000/00           22 SSE AERO 23 MPH SSE RMY 23
12/2  38/34/36/0/T/0.0/000/00             15 NW  AERO 15 MPH NW  RMY 16
12/3  45/32/39/+3/0.00/0.0/284/51         18 NNW AERO 18 MPH NNW RMY 20
12/4  43/29/36/+1/0.00/0.0/389/70         21 WNW AERO 21 MPH WNW RMY 21
12/5  53/38/46/+11/0.02/0.0/000/00        36 S   AERO 40 MPH S   RMY 39
12/6  55/33/44/+9/0.38/T/000/00           25 SSW AERO 28 MPH SSW RMY N/A
12/7  40/26/33/-1/0.12/T/287/52           23 NW  AERO 25 MPH NW  RMY N/A
12/8  30/22/26/-8/T/T/039/07              25 NW  AERO 27 MPH NW  RMY N/A
12/9  41/25/33/-1/0.35/0.6/000/00         28 E   AERO 28 MPH E   RMY 24
12/10 33/21/27/-6/0.14/2.1/000/00         28 W   AERO 28 MPH W   RMY 28
12/11 28/19/24/-9/0.00/0.0/345/63         27 SW  AERO 28 MPH SW  RMY 27
12/12 23/14/19/-14/0.00/0.0/542/99        28 WNW AERO 31 MPH NW  RMY 30
12/13 28/14/21/-11/0.00/0.0/405/74        31 W   AERO 32 MPH W   RMY 33
12/14 28/9/19/-13/0.45/4.8/000/00         30 E   AERO 26 MPH E   RMY N/A
12/15 36/21/29/-3/0.98/2.0/000/00         48 NE  AERO 50 MPH NE  RMY 51
12/16 27/14/21/-10/0.00/0.0/529/97        36 W   AERO 37 MPH W   RMY N/A
12/17 23/7/15/-16/0.53/5.5/104/19         28 N   AERO 30 MPH N   RMY 28
12/18 32/15/24/-7/0.00/0.0/436/80         29 WNW AERO 30 MPH NW  RMY 29
12/19 42/22/32/+2/0.00/0.0/425/78         38 SW  AERO 44 MPH SW  RMY 42
12/20 52/34/43/+13/0.00/0.0/332/61        26 SSW AERO 29 MPH SSW RMY 29
12/21 58/42/50/+20/0.00/0.0/082/15        28 SSW AERO 29 MPH SSW RMY 30
12/22 63/35/49/+20/0.01/0.0/000/00        37 SW  AERO 41 MPH SW  RMY 41
12/23 37/32/35/+6/0.73/0.0/000/00   24 NW  AERO 25 MPH NW  RMY 25
12/24 36/25/31/+2/T/T/142/26              25 NW  AERO 29 MPH N   RMY N/A
12/25 25/13/19/-9/0.00/0.0/480/88         29 NW  AERO 30 MPH WNW RMY 30
12/26 35/19/27/-1/0.05/0.5/000/00         24 W   AERO 25 MPH W   RMY 25
12/27 32/22/27/-1/0.00/0.0/344/63         25 W   AERO 25 MPH W   RMY 26
12/28 46/25/36/+8/0.00/0.0/300/55         30 WSW AERO 32 MPH SW  RMY 32
12/29 42/34/38/+11/1.23/0.0/000/00        36 NNE AERO 37 MPH NNE RMY 38
12/30 39/17/28/+1/0.00/0.0/071/13         38 W   AERO 39 MPH W   RMY 36
12/31 24/11/19/-9/0.00/0.0/236/43         30 W   AERO 31 MPH W   RMY 30

1/1   26/16/21/-6/0.00/0.0/…/..         25 W   AERO 25 MPH W   RMY 27
1/2   24/0/12/-15/…./../000/00          39 NNE AERO 39 MPH NNE RMY 39
1/3   12/-3/5/-21/…/../000/00           36 N   AERO 39 MPH N   RMY 34
1/4   25/-4/11/-15/…./../…/..         35 SSW AERO 37 MPH SSW RMY 38
1/5   42/23/33/+7/…./../…..           30 SE  AERO 32 MPH SE  RMY 42

1/6 morning low temp: 42F; the normal low is now 18F

DAILY RECORDS FOR DECEMBER 2013
12/22- NEW DAILY RECORD MAXIMUM TEMPERATURE OF 63F;
surpasses previous record of 62F set in 1994

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

RECORDS FOR JANUARY 6
HIGH 66F IN 2007
LOW -14F IN 1896
PRECIP 3.10 INS. IN 1889 [RECORD FOR MONTH]
SNOWFALL 7.5 INS. IN 1893
PEAK GUST 70 MPH WNW IN 1959

RECORDS FOR JANUARY 7
HIGH 60F IN 1930
LOW -7F IN 1896
PRECIP 1.97 INS. IN 1977
SNOWFALL 16.0 INS. IN 1977
PEAK GUST 74 MPH NW IN 1968

TODAY’S REPORT PREPARED BY: Brian Fitzgerald

Category: Daily Discussions

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