BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, FEBRUARY 21, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNNY AND DRY CONDITIONS CONTINUE WITH LIGHTER WINDS
Our mostly sunny, warm, and dry trend continued today.
Overnight temps. reached a minimum of 25F this morning
and had risen to 43F by 1:00PM. Dew points remained in
the upper teens and low 20s. Visibility was 70-80 miles
again all day. Despite similar temperatures yesterday,
the day was much more pleasant with light winds. Winds
shifted from NNW in the morning to S by 1:00PM.
Today’s Observations:
7 A.M.
Weather: Few cirrus in all directions
Temperature: 25F; Dew Point: 15F; Wind: NNW at 6 kts,
Wind Speed: Light
Sea-level pressure: 30.39 ins. Hg, falling then rising
Visibility: 80 miles
6-hr Max temp: 28F
6-hr Min temp: 25F
24-hr precip: 0.00 in.
24-hr snowfall: 0.0 in.
BHO SA 1155 CLR 80 291/25/15/3306/039/ FEW CI ALQDS WND LGT/
8/001 4/003 53006 10028 20025
10 A.M.
Weather: Scattered cirrus
Temperature: 38F; Dew Point: 21F; Wind: ENE at 5 kts,
Wind Speed: Light
Sea-level pressure: 30.37 ins. Hg, rising then falling
Visibility: 70 miles
BHO SA 1455 250 SCT 70 286/38/21/0705/037/ WND LGT/ 8/001 58005
1 P.M.
Weather: Few altocumulus in all directions, broken cirrus
Temperature: 42F; Dew Point: 20F; Wind: S at 4 kts,
Wind Speed: Light
Sea-level pressure: 30.30 ins. Hg, falling, then more quickly
Visibility: 70 miles
BHO SA 1755 E250 BKN 70 262/42/20/1804/030/ FEW AC ALQDS WND LGT/
8/031 4/003 58024 10043 20025
SUMMARY FOR MONDAY, FEBRUARY 20, 2017
TEMPERATURE (DEGREES F)
MAX…..42 NORMAL…..38
MIN…..29 NORMAL…..20
MEAN….36 NORMAL…..29
DEPARTURE FROM 30-YEAR NORMAL…………………….+7
TOTAL DEPARTURE FOR THE MONTH……………………+54 [+2.5 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..29 DEPARTURE……….-7
TOTAL HEATING UNITS FOR THE MONTH………….701 DEPARTURE………-56
TOTAL HEATING UNITS FOR THE SEASON………..3728 DEPARTURE……..-559
TOTAL HEATING UNITS LAST SEASON TO DATE……3463 DIFFERENCE…….+265
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….25 NW AT 3:36 P.M.
AERO……………………28 NW AT 3:37 P.M.
ASOS……………………28 NW AT 3:36 P.M.
DAVIS…………………..26 NNW AT 3:36 P.M. RMY 27
FASTEST MILE FOR YESTERDAY…………………17 NW AT 2:37 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………20 NNW AT 3:37 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..18 NNW AT 3:37 P.M.
AVERAGE WIND SPEED AND DIRECTION………….11.0 NNW
ASOS………………….11.0
DAVIS………………….9.8 N [350 deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00 DEPARTURE……-0.15
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….3.63 DEPARTURE……+0.82
ASOS…………….NA
TOTAL PRECIPITATION FOR THE YEAR………..9.13 DEPARTURE……+1.97
ASOS…………….NA
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0 DEPARTURE…….-0.5
TOTAL SNOWFALL FOR THE MONTH……………31.5 DEPARTURE……+21.6
TOTAL SNOWFALL FOR THE SEASON…………..52.3 DEPARTURE…….+9.3
PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/PEAK GUST/AERO/RMY GUST
AERO: Aerovane wind recording system 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
M: Missing data
2/1 40/25/33/+7/0.03/0.4/228/38 43 W AERO 44 W RMY 47
2/2 38/25/32/+6/T/T/265/44 36 WNW AERO 37 WNW RMY 36
2/3 30/19/25/-1/0.00/0.0/351/58 28 WNW AERO 29 WNW RMY 31
2/4 31/15/23/-3/0.00/0.0/590/97 31 WNW AERO 30 WNW RMY N/A
2/5 43/22/33/+7/0.00/0.0/092/15 38 SSW AERO 41 SSW RMY N/A
2/6 37/28/33/+7/0.00/0.0/503/82 41 WNW AERO 41 WNW RMY 43
2/7 37/30/34/+7/0.54/0.7/000/00 32 ENE AERO 31 ENE RMY 32
2/8 49/25/37/+10/T/0.0/136/22 25 W AERO 25 W RMY 31
2/9 35/8/22/-5/1.60/16.9/000/00 54 NNE AERO 53 NNE RMY 54 TSTM
2/10 24/7/16/-11/T/T/623/100 43 WNW AERO 50 WNW RMY 48
2/11 27/15/21/-6/0.14/2.9/000/00 21 SE AERO 20 SE RMY 19
2/12 32/17/25/-2/0.71/5.6/000/00 22 ENE AERO 28 ENE RMY N/A
2/13 32/20/26/-2/0.27/2.2/032/05 48 NW AERO 60 NW RMY 61
2/14 35/16/26/-2/0.00/0.0/…/.. 23 NW AERO 24 NW RMY 24
2/15 40/25/33/+5/0.17/1.2/…/.. 31 SE AERO 33 NW RMY N/A
2/16 33/23/28/0/0.17/1.6/…/.. 38 WNW AERO 38 WNW RMY 40
2/17 38/19/29/+1/0.00/0.0/…/.. 36 WNW AER0 35 WNW RMY 35
2/18 50/24/37/+8/0.00/0.0/…/.. 31 SSW AERO 33 SSW RMY 34
2/19 58/42/50/+21/0.00/0.0/…/.. 32 W AERO 33 W RMY 32
2/20 42/29/36/+7/0.00/0.0/…/.. 25 NW AERO 28 NW RMY 27
2/21 Low temp since midnight is 25F; normal low is now 20F
DAILY RECORDS FOR FEBRUARY 2017
2/09/17: NEW DAILY RECORD MAXIMUM SNOWFALL OF 16.9 INS.
PREVIOUS RECORD WAS 14.0 INS. SET IN 2015
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR FEBRUARY 21
HIGH 62F IN 1930
LOW -6F IN 1950
PRECIP 2.42 INCHES IN 1898
SNOWFALL 9.0 INCHES IN 1929
PEAK GUST 72 MPH WNW IN 1967
RECORDS FOR FEBRUARY 22
HIGH 63F IN 1997
LOW -1F IN 1918
PRECIP 1.38 INCHES IN 1900
SNOWFALL 8.0 INCHES IN 1893
PEAK GUST 74 MPH S IN 1974
TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle and Lizzy Suzedell
Monthly Skymail, event announcements, and research summaries.
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