Tuesday, February 27, 2018
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, FEBRUARY 27, 2018
ALL TIMES ARE IN EASTERN STANDARD TIME
HIGH PRESSURE BRINGS DRY, CLEAR CONDITIONS TO
GREAT BLUE HILL…
Visibility was high today, 70 miles at the 7 A.M.
observation, increasing to 80 miles by 1 P.M. This
was due to low humidity and dew points. Humidity
decreased as visibility increased throughout the
day. Clear skies today with few clouds at each
observation. We had above seasonable temperatures
with a max of 49F by 1 P.M. today. The daily normal
is 40F. The low since midnight of 29F is seven
degrees above the daily normal of 22F. Winds
increased, but were light to moderate today from
the WNW.
Today’s Observations:
7 A.M.
Weather: Clear, few cumulus distant offshore ENE
Temperature: 31F; Dew Point: 21F; Wind: WNW at 07G14 kts
Sea-level pressure: 30.33 ins. Hg, rising, then more rapidly
Visibility: 70 miles
6-hr Max temp: 35F
6-hr Min temp: 29F
24-hr precip: 0.00 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1155 CLR 70 270/31/21/307G14/033/ FEW CU DSNT OFFSHR
ENE/ 8/100 53013 10035 20029
10 A.M.
Weather: Clear, few altocumulus distant offshore ENE
Temperature: 42F; Dew Point: 19F; Wind: WNW at 08G12 kts,
Sea-level pressure: 30.37 ins. Hg, rising, then more slowly
Visibility: 75 miles
3-hr precip: 0.00 ins.
3-hr snowfall: 0.0 ins.
BHO SA 1455 CLR 75 280/42/19/3108G12/037/ FEW AC DSNT OFFSHR
ENE/ 8/060 51010
1 P.M.
Weather: Clear, few cirrostratus distant E-NNE
Temperature: 49F; Dew Point: 19F; Wind: WNW at 05G20 kts,
Wind: Light
Sea-level pressure: 30.25 ins. Hg, falling then more rapidly
Visibility: 80 miles
6-hr Max temp: 49F
6-hr Min temp: 31F
6-hr precip: 0.00 ins.
6-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1755 CLR 80 267/49/19/3005G20/025/ FEW CS DSNT E-NNE
WND LGT/ 8/002 58013 10049 20031
SUMMARY FOR MONDAY, FEBRUARY 26, 2018
TEMPERATURE (DEGREES F)
MAX…..48 NORMAL…..39
MIN…..35 NORMAL…..21
MEAN….42 NORMAL…..30
DEPARTURE FROM 30-YEAR NORMAL………………………+12
TOTAL DEPARTURE FOR THE MONTH……………………..+208 [+7.8 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY………….23 DEPARTURE………-12
TOTAL HEATING UNITS FOR THE MONTH…………759 DEPARTURE……..-209
TOTAL HEATING UNITS FOR THE SEASON……….4080 DEPARTURE……..-419
TOTAL HEATING UNITS LAST SEASON TO DATE…..3833 DIFFERENCE…….+247
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….29 WNW AT 7:46 P.M.
AERO……………………25 WNW AT 9:16 P.M.
ASOS……………………27 WNW AT 7:46 P.M.
DAVIS…………………..27 M AT 7:46 P.M ** RMY 28
FASTEST MILE FOR YESTERDAY…………………17 WNW AT 7:46 P.M.*
MAXIMUM 2-MINUTE ASOS AVERAGE………………18 WNW AT 9:09 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..17 M AT 6:56 P.M.**
AVERAGE WIND SPEED AND DIRECTION…………..11.0 WNW
ASOS…………………..11.1
DAVIS………………….9.7 **
* Estimated
** Davis direction malfunctioning
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00 DEPARTURE……-0.16
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….4.11 DEPARTURE……+0.37
ASOS…………..4.27
TOTAL PRECIPITATION FOR THE YEAR……….10.11 DEPARTURE……+2.02
ASOS………….10.85
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0 DEPARTURE……..-0.4
TOTAL SNOWFALL FOR THE MONTH……………10.2 DEPARTURE……..-2.7
TOTAL SNOWFALL FOR THE SEASON…………..44.7 DEPARTURE……..-1.4
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 45/27/36/+10/…./0.0/120/20 36 SSW AERO 35 SSW RMY N/A
2/2 34/08/21/-5/…./2.5/223/37 43 WNW AERO 46 WNW RMY 46
2/3 25/04/15/-11/0.00/0.0/557/92 26 S AERO 24 S RMY 30
2/4 45/23/34/+8/…/T/000/00 31 SSE AERO 29 S RMY 30
2/5 46/19/33/+7/0.00/0.0/464/76 47 WNW AERO 47 WNW RMY 44
2/6 31/17/24/+2/T/T/025/04 26 SSW AERO 23 SSW RMY 23
2/7 42/21/32/+5/0.62/1.1/000/00 45 SW AERO 46 SW RMY 47
2/8 30/20/25/-2/0.00/0.0/501/81 38 WNW AERO 38 WNW RMY N/A
2/9 30/16/23/-4/0.00/0.0/384/62 28 S AERO 25 S RMY N/A
2/10 51/28/40/+13/…./0.0/…/.. 31 S AERO 30 S RMY 31
2/11 46/36/41/+14/…./0.0/000/00 24 SW AERO 21 SW RMY N/A
2/12 53/27/40/+13/…./0.0/…/.. 33 WNW AERO 33 WNW RMY N/A
2/13 31/21/26/-2/0.00/0.0/…/.. 22 S AERO 18 WNW RMY 21
2/14 46/25/36/+8/0.00/0.0/…/.. 30 S AERO 26 SSW RMY 29
2/15 47/35/41/+13/…./0.0/000/00 23 SSW AERO 20 SSW RMY N/A
2/16 50/31/41/+13/…./0.0/…/.. 45 W AERO 44 W RMY 42
2/17 38/23/31/+3/…./…/…/.. 33 SSW AERO 29 SSE RMY 33
2/18 42/29/35/+6/…./…/…/.. 32 WNW AERO 29 WNW RMY 34
2/19 48/30/39/+10/…./0.0/…/.. 39 SSW AERO 37 SSW RMY 40
2/20 68/48/58/+29/…./0.0/…/.. 32 SSW AERO 30 SSW RMY N/A
2/21 70/50/60/+31/0.00/0.0/…/.. 32 SW AERO 30 SW RMY 33
2/22 53/30/42/+13/…./0.8/…/.. 30 N AERO 28 N RMY N/A
2/23 41/28/35/+5/0.20/0.0/…/.. 34 SW AERO 20 SW RMY N/A
2/24 54/35/45/+15/…./…/…/.. 32 W AERO 30 W RMY 29
2/25 39/33/36/+6/…./T/000/00 33 ESE AERO 30 ESE RMY 33
2/26 48/35/42/+12/0.00/0.0/…/.. 29 WNW AERO 25 WNW RMY 28
2/27 Low temp since midnight is 29F; normal low is now 22F
DAILY RECORDS FOR FEBRUARY 2018
2/20/18: NEW DAILY RECORD HIGH MAXIMUM TEMPERATURE OF 68F
PREVIOUS RECORD WAS 66F SET IN 1930
2/21/18: NEW DAILY RECORD HIGH MAXIMUM TEMPERATURE OF 70F
PREVIOUS RECORD WAS 62F SET IN 1930
2/21/18: NEW DAILY RECORD HIGH MINIMUM TEMPERATURE OF 50F
PREVIOUS RECORD WAS 45F SET IN 2002
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR FEBRUARY 27
HIGH 61F IN 1976
LOW -8F IN 1900
PRECIP 1.43 INCHES IN 2013
SNOWFALL 6.0 INCHES IN 1922
PEAK GUST 67 MPH W IN 1985
RECORDS FOR FEBRUARY 28
HIGH 62F IN 1976
LOW -2F IN 1907,1934
PRECIP 1.79 INCHES IN 1958
SNOWFALL 8.5 INCHES IN 2005
PEAK GUST 88e MPH SSW IN 1943
TODAY’S REPORT PREPARED BY: Ben Turner and Kaitlin Geagan
