Saturday, December 28, 2013
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, DECEMBER 28, 2013
ALL TIMES ARE IN EASTERN STANDARD TIME
MILD DAY ON THE SUMMIT WITH WARM SW BREEZE
CLOUDS BUILD AFTER NEARLY CLEAR SUNRISE, RAPIDLY CLEAR AFTER NOON
Only a few thin altocumulus clouds were passing during this morning’s
orange sunrise. Shortly afterward a few layers of stratocumulus and
altocumulus obscured the sky, which in turn cleared out rapidly just before
1:00 P.M. leaving clear skies for the rest of the afternoon.
A steady SW wind brought mild air to the region, with high temps reaching the
mid-40s. All remaining snow on the ground has nearly melted, with only
trace patches left in shady areas.
Today’s Observations:
7 A.M.
Weather: Clear with few thin altocumulus in the vicinity, stratocumulus
distant SSW-N-NE
Temperature: 27F; Dew Point: 22F; Wind: SW at 16 kts
Sea-level pressure: 30.13 ins. Hg, falling then falling more rapidly
Visibility: 35 miles, hazy
6-hr. min temp: 25F
BHO SA 1155 CLR 35 203/27/22/2016/013/ FEW THN AC VCNTY
SCT SC DSNT SSW-N-NE HAZY/ 8/800 58020 10027 20025
10 A.M.
Weather: Sun dimly visible through scattered and broken stratocumulus with
altocumulus (2 layers)
Temperature: 35F; Dew Point: 24F; Wind: SW at 11 kts
Sea-level pressure: 30.12 ins. Hg, falling then rising
Visibility: 35 miles, hazy
BHO SA 1455 110 SCT E130 OVC 35 201/35/24/2211/012/ SUN DMLY VSBL THRU
BKN AC HAZY/ 8/8// 55002
1 P.M.
Weather: Clear with few cumulus in the vicinity after rapid clearing,
stratocumulus and altocumulus distant WNW-E-WSW
Temperature: 44F; Dew Point: 25F; Wind: WSW at 12 kts
Sea-level pressure: 30.03 ins. Hg, falling then falling more rapidly
Visibility: 40 miles, hazy
6-hr max temp: 44F
BHO SA 1755 CLR 40 171/44/25/2512/003/ FEW CU INVCY SC/AC DSNT WNW-E-WNW
HAZY/ 8/800 58030 10044 20027
WEATHER SUMMARY FOR FRIDAY, DECEMBER 27, 2013
TEMPERATURE (DEGREES F)
MAX…..32 NORMAL…..36
MIN…..22 NORMAL…..20
MEAN….27 NORMAL…..28
DEPARTURE FROM 30-YEAR NORMAL………………….-1
TOTAL DEPARTURE FOR THE MONTH…………………-22 [-1.0 DEGREE/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..38 DEPARTURE………+1
TOTAL HEATING UNITS FOR THE MONTH………….913 DEPARTURE……..+21
TOTAL HEATING UNITS FOR THE SEASON………..2137 DEPARTURE……..-17
TOTAL HEATING UNITS LAST SEASON TO DATE……1874 DIFFERENCE……+263
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………25 W AT 10:11 A.M.
AERO…………………..25 W AT 10:18 A.M.
ASOS…………………..27 W AT 10:16 A.M.
DAVIS………………….26 W AT 10:16 A.M. RMY 26
FASTEST MILE FOR YESTERDAY………………..20 W AT 10:16 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..22 W AT 10:13 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….20 W AT 10:13 A.M.
AVERAGE WIND SPEED AND DIRECTION…………12.3 W
ASOS…………………12.4
DAVIS………………..11.1 W [258 deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00 DEPARTURE………….-0.14
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….4.04 DEPARTURE………….-0.28
ASOS…………..4.02
TOTAL PRECIPITATION FOR THE YEAR……….50.64 DEPARTURE………….-2.21
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………….-0.5
TOTAL SNOWFALL FOR THE MONTH…………15.4 DEPARTURE………….+4.2
TOTAL SNOWFALL FOR THE SEASON………..15.6 DEPARTURE………….+1.8
PRELIMINARY CLIMATE SUMMARY FOR 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
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/…/.. 26 SSW AERO 29 MPH SSW RMY 29
12/21 58/42/50/+20/0.00/0.0/…/.. 28 SSW AERO 29 MPH SSW RMY 30
12/22 63/35/49/+20/…./0.0/…/.. 37 SW AERO 41 MPH SW RMY 41
12/23 37/32/35/+6/…./0.0/000/00 24 NW AERO 25 MPH NW RMY 25
12/24 36/25/31/+2/T/T/…/.. 25 NW AERO
12/25 25/13/19/-9/0.00/0.0/…/.. 29 NW AERO 30 MPH WNW RMY 30
12/26 35/19/27/-1/0.05/0.4/000/00 24 W AERO 25 MPH W RMY 25
12/27 32/22/27/-1/0.00/0.0/000/00 25 W AERO 25 MPH W RMY 26
12/28 morning low temp: 25F; the normal low is now 20F
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 DECEMBER 28
HIGH 60 IN 1982
LOW -2 IN 1933
PRECIP 2.16 INS. IN 1967
SNOWFALL 9.5 INS. IN 1967
PEAK GUST 89 MPH SSE IN 1983
RECORDS FOR DECEMBER 29
HIGH 72 IN 1984
LOW -19 IN 1933 (RECORD FOR DECEMBER)
PRECIP 1.91 INS. IN 1945
SNOWFALL 18.4 INS. IN 1945
PEAK GUST 95 MPH S IN 1966 (RECORD FOR DECEMBER)
TODAY’S REPORT PREPARED BY: Forrest Iwanik
