Tuesday, December 23, 2014
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, DECEMBER 23, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME
RAIN SHOWERS BEGIN IN EARNEST EARLY THIS MORNING,
FOGGY, DAMP CONDITIONS PERSIST ON GREAT BLUE HILL
Light rain showers moved through the region yesterday
mid day and afternoon bringing light precipitation totals
to the area. Some breaks of sun allowed a small amount
of sunshine minutes to an already very cloudy month of
December thus far.
By 5:00 AM EST this morning more substantial rain showers
brought 0.08 inches by the 7:00 AM EST observation with
foggy conditions limiting visibility to 1/2 mile. Fog lifted
by mid morning, with the 10:00 AM EST recording an overcast
stratus layer at 300 feet above the summit. Rain stopped,
then began again, then changed over to light drizzle
by the 1:00 PM EST observation with 0.03 inches of precipitation
falling between 7:00 AM and 1:00 PM EST. Fog returned with
the precipitation as well, reducing visibility once
more on the summit. A maximum of 43F had been recorded so far.
Today’s Observations:
7 A.M.
Weather: Fog, light rain ended at 6:45 AM EST
Temperature: 41F; Dew Point: 41F; Wind: ENE at 17G22 kts
Sea-level pressure: 30.26 ins. Hg, rising then falling and higher
Visibility: 1/2 of a mile, obscured by fog
6-hr max temp: 41F
6-hr min temp: 39F
24-hr precip: 0.08 ins
24-hr snowfall: Trace
BHO SA 1155 W2 X 1/2F 247/41/41/0717G22/026/
R-E45/ 8//// 50003 ASOS 60007 70009 MANUAL 70008 10041 20039
10 A.M.
Weather: Light rain, fog, overcast stratus
Temperature: 42F; Dew Point: 42F; Wind: E at 12G20 kts,
Sea-level pressure: 30.27 ins. Hg, rising then falling and higher
Visibility: 4 miles, except 8 miles S, obscured by fog
3-hr precip: 0.01 ins
BHO SA 1455 E3 OVC 4R-F 249/42/42/0812G20/027/
VSBY S 8 MI/ 8/6// 50002 ASOS 60001 MANUAL 60001
1 P.M.
Weather: Light drizzle, fog
Temperature: 43F; Dew Point: 43F; Wind: ENE at 11G16 kts
Sea-level pressure: 30.20 ins. Hg, falling then more slowly
Visibility: 5/16 of a mile, obscured by fog and light drizzle
6-hr max temp: 43F
6-hr min temp: 41F
6-hr precip: 0.03 ins
6-hr snowfall: 0.0
BHO SA 1755 W3 X 5/16L-F 226/43/43/0611G16/020/
8//// 56023 ASOS 60004 MANUAL 60003 10043 20041
SUMMARY FOR MONDAY, DECEMBER 22, 2014
TEMPERATURE (DEGREES F)
MAX…..42 NORMAL…..37
MIN…..29 NORMAL…..22
MEAN….36 NORMAL…..29
DEPARTURE FROM 30-YEAR NORMAL…………………….+7
TOTAL DEPARTURE FOR THE MONTH……………………+47 [+2.1 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..29 DEPARTURE………..-7
TOTAL HEATING UNITS FOR THE MONTH………….670 DEPARTURE……….-39
TOTAL HEATING UNITS FOR THE SEASON………..1829 DEPARTURE………-142
TOTAL HEATING UNITS LAST SEASON TO DATE……1950 DIFFERENCE……..-121
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………23 E AT 11:50 P.M.
ASOS…………………..25 ESE AT 9:34 P.M.
DAVIS………………….24 ESE AT 9:33 P.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………..19 E AT 9:37 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..17 E AT 9:44 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….18 E AT 9:36 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..9.2 N
ASOS…………………..9.9
DAVIS………………….8.3 NE [044 degrees]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.08 DEPARTURE…..-0.08
ASOS…………..0.09
TOTAL PRECIPITATION FOR THE MONTH……….6.12 DEPARTURE…..+2.57
ASOS…………..6.30
TOTAL PRECIPITATION FOR THE YEAR……….53.88 DEPARTURE…..+1.80
ASOS………….54.49
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0 DEPARTURE……-0.5
TOTAL SNOWFALL FOR THE MONTH…………….2.3 DEPARTURE……-6.4
TOTAL SNOWFALL FOR THE SEASON…………..11.0 DEPARTURE……-0.3
PRELIMINARY CLIMATE SUMMARY FOR 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
12/1 63/37/50/+13/0.01/0.0/391/70 28 WNW RMY 31
12/2 37/30/34/-2/0.10/T/000/00 26 E RMY 29
12/3 49/34/42/+6/0.31/0.0/000/00 40 W RMY 43
12/4 41/27/34/-1/0.00/0.0/505/91 29 WNW RMY N/A
12/5 42/23/33/-2/0.12/0.0/382/69 21 E RMY 22
12/6 43/36/40/+5/0.99/0.0/000/00 25 NNW RMY N/A
12/7 36/18/27/-7/0.15/0.0/193/35 31 N RMY 34
12/8 25/16/21/-13/0.01/0.1/000/00 24 N RMY N/A
12/9 48/25/37/+3/3.23/0.0/000/00 48 ENE RMY 52
12/10 47/35/41/+8/0.43/0.0/000/00 35 NNE RMY 37
12/11 35/29/32/-1/0.05/0.5/000/00 27 SW RMY 27
12/12 36/26/31/-2/0.00/0.0/230/42 23 WNW RMY 25
12/13 40/27/34/+2/0.00/0.0/191/35 28 NW RMY 28
12/14 43/28/36/+4/0.00/0.0/377/69 20 NW RMY 20
12/15 41/28/35/+3/0.00/0.0/536/98 17 NW RMY 17
12/16 42/33/38/+7/T/T/011/02 17 E RMY N/A
12/17 45/37/41/+10/0.43/0.0/000/00 27 W RMY N/A
12/18 41/32/37/+6/0.02/T/213/39 35 WNW RMY 38
12/19 34/25/30/0/0.00/0.0/000/00 26 NW RMY 29
12/20 32/24/28/-2/…./…/…/.. 21 NNE RMY 23
12/21 31/29/30/+0/…./…/000/00 20 NNE RMY 22
12/22 42/29/36/+7/…./…/…/.. 23 E RMY N/A
12/23 morning low temp: 39F since midnight; normal low is now 21F
DAILY RECORDS FOR DECEMBER 2014:
-DAILY PRECIPITATION RECORD FOR DECEMBER 9 2014
Old record of 1.51 inches set in 1952,
replaced with new record of 3.23 inches.
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR DECEMBER 23
HIGH 62 IN 1990
LOW -1 IN 1989
PRECIP 1.70 INS. IN 1947
SNOWFALL 11.9 INS. IN 1947
PEAK GUST 67 SSE IN 2004
RECORDS FOR DECEMBER 24
HIGH 58 IN 1996
LOW -6 IN 1943
PRECIP 2.21 INS. IN 1994
SNOWFALL 12.3 INS. IN 1961
PEAK GUST 79e MPH SE IN 1941
TODAY’S REPORT PREPARED BY: Brian Fitzgerald
