Monday, December 29, 2014
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, DECEMBER 29, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME
SKIES CLEAR BY MONDAY MORNING, COOL,
DRY AIR WORKS INTO THE REGION
Following Sunday’s numerous light showers totaling 0.02 inches,
clouds were slow to clear. By this morning’s 7:00 AM EST
observation, scattered cirrus, altocumulus to the south,
and stratocumulus over the ocean began to slowly dissipate.
Yesterday’s mean temperature of 42F was 14 degrees above the
daily norm, adding to an already warm December. Following Sunday,
temperatures were averaging 4.2F degrees above normal.
By today’s 1:00 PM EST observation high cirrus and small cumulus
were allowing sunshine to continue into the afternoon, with a
maximum of 41F recorded so far. Visibility had improved to
80 miles in all directions with a clear line of sight
into SW New Hampshire.
Today’s Observations:
7 A.M.
Weather: Scattered cirrus, few stratocumulus/cumulus
distant offshore NE-ESE, few altocumulus distant SE-SW
Temperature: 30F; Dew Point: 21F; Wind: W at 8 kts
Sea-level pressure: 30.11 ins. Hg, increasing, then more slowly
Visibility: 70 miles, except 50 miles SE-SW
6-hr max temp: 34F
6-hr min temp: 30F
24-hr precip.: 0.02 ins
BHO SA 1155 250 SCT 70 195/30/21/2608/011/ VSBY SE-SW 50 MI
FEW SC/CU DSNT OFFSHR NE-ESE FEW AC DSNT SE-SW/
8/832/ 51013 ASOS 70003 MANUAL 70002 10034 20030
10 A.M.
Weather: Clear, few cumulus distant WSW-N, few altocumulus
and cirrus distant E-SW
Temperature: 36F; Dew Point: 22F; Wind: W at 8 kts
Sea-level pressure: 30.14 ins. Hg, rising steadily
Visibility: 80 miles
BHO SA 1455 CLR 80 207/36/22/2808/014/
FEW CU DSNT WSW-N FEW AC AND CI DSNT E-SW/ 8/132/ 52012
1 P.M.
Weather: Broken cirrus, few small cumulus in all directions
Temperature: 39F; Dew Point: 21F; Wind: WNW at 12G20 kts,
Sea-level pressure: 30.09 ins. Hg, falling, then steady
Visibility: 80 miles
6-hr max temp: 41F
6-hr min temp: 30F
BHO SA 1755 E250 BKN 80 189/39/21/2912G20/009/
FEW SML CU ALQDS/ 8/102 56018 10041 20030
SUMMARY FOR SUNDAY, DECEMBER 28, 2014
TEMPERATURE (DEGREES F)
MAX…..49 NORMAL…..36
MIN…..35 NORMAL…..20
MEAN….42 NORMAL…..28
DEPARTURE FROM 30-YEAR NORMAL……………………+14
TOTAL DEPARTURE FOR THE MONTH……………………+122 [+4.2 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..23 DEPARTURE……….-14
TOTAL HEATING UNITS FOR THE MONTH………….790 DEPARTURE………-140
TOTAL HEATING UNITS FOR THE SEASON………..1949 DEPARTURE………-242
TOTAL HEATING UNITS LAST SEASON TO DATE……2166 DIFFERENCE……..-217
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………31 W AT 1:44 P.M.
ASOS…………………..37 W AT 1:45 P.M.
DAVIS………………….35 W AT 1:44 P.M. RMY 36
FASTEST MILE FOR YESTERDAY………………..26 W AT 1:43 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..26 W AT 1:46 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….23 W AT 1:46 P.M.
AVERAGE WIND SPEED AND DIRECTION………….15.4 W
ASOS………………….15.0
DAVIS…………………13.7 WSW [244 degrees]
* last of several occurrences…
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.02 DEPARTURE…..-0.13
ASOS…………..0.03
TOTAL PRECIPITATION FOR THE MONTH……….7.21 DEPARTURE…..+2.74
ASOS…………..7.44
TOTAL PRECIPITATION FOR THE YEAR……….54.97 DEPARTURE…..+1.97
ASOS………….55.63
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0 DEPARTURE……-0.6
TOTAL SNOWFALL FOR THE MONTH…………….2.3 DEPARTURE……-9.5
TOTAL SNOWFALL FOR THE SEASON…………..11.0 DEPARTURE……-3.4
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/…./…/164/30 21 NNE RMY 23
12/21 31/29/30/+0/…./…/000/00 20 NNE RMY 22
12/22 42/29/36/+7/…./0.0/…/.. 23 E RMY N/A
12/23 44/39/42/+13/…./0.0/000/00 28 ENE RMY 30
12/24 61/40/51/+22/…./0.0/000/00 32 SSW RMY 41
12/25 61/41/51/+23/…./0.0/…/.. 37 W RMY 43
12/26 47/35/41/+13/0.00/0.0/…/.. 24 WSW RMY 28
12/27 50/35/43/+15/0.00/0.0/…/.. 21 SSW RMY N/A
12/28 49/35/42/+14/0.02/0.0/…/.. 31 W RMY 36
12/29 morning low temp: 30F since midnight; normal low is now 20F
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 TEMPERATURE RECORD FOR DECEMBER 24 2014
Old record of 58F set in 1996,
replaced with new record of 61F.
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
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)
RECORDS FOR DECEMBER 30
HIGH 60 IN 1984
LOW -18 IN 1933
PRECIP 1.48 INS. IN 1891
SNOWFALL 7.5 INS. IN 1956
PEAK GUST 81 MPH WNW IN 1962
TODAY’S REPORT PREPARED BY: Brian Fitzgerald
