Thursday, April 27, 2017
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, APRIL 27, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME
MORNING FOG LIFTS AS PRESSURE RISES
Dense fog covered Great Blue Hill this morning but began clearing
in the afternoon. Pressure has been slowly increasing throughout
the day making for a drier afternoon. Precip. measured at 7:00AM EST
this morning was .43 inches, making the final storm total 1.99 inches.
There was light drizzle at the 7:00 AM which stopped shortly after the
observation with no additional precip. measured in the day.
Winds have been light and variable today, with a peak gust of 10 MPH
by 1:00 PM. Temperatures had warmed to 65F by 1:00PM. This is slightly
above the normal of 60F.
Today’s Observations:
7 A.M.
Weather: Light drizzle, sky obscurement due to fog
Temperature: 51F; Dew Point: 51F; Wind: NNE at 2 kts,
Wind: Light
Sea-level pressure: 29.93 ins. Hg, rising unsteadily
Visibility: 1/8 mile
6-hr Max temp: 51F
6-hr Min temp: 50F
24-hr precip: 0.43 in.
24-hr snowfall: 0.0 in.
BHO SA 1155 W2 X 1/8L-F 134/51/51/0302/993/ 8//// WND LGT/ 52018
MANUAL 70043 ASOS 70045 10051 20050
10 A.M.
Weather: Sky obscurement due to fog
Temperature: 55F; Dew Point: 54F; Wind: WNW at 5 kts,
Wind: Light
Sea-level pressure: 29.95 ins. Hg, rising, then more slowly
Visibility: 1 1/8 miles
3-hr precip: 0.00 in.
3-hr snowfall: 0.0 in.
BHO SA 1455 W3 X 1 1/8F 141/55/54/2905/995/ 8//// WND LGT/ 51007
1 P.M.
Weather: Broken stratus
Temperature: 66F; Dew Point: 54F; Wind: Variable at 3 kts,
Wind: Light
Sea-level pressure: 29.94 ins. Hg, steady then falling
Visibility: 40 miles
6-hr Max temp: 65F
6-hr Min temp: 51F
6-hr precip: 0.00 in.
6-hr snowfall: 0.0 in.
BHO SA 1755 E23 BKN 40 138/66/54/VRB03/994/ 8/6// WND LGT
VSBY WNW-ENE 20 DSNT FG WNW-ENE/ 55003 10065 20051
SUMMARY FOR WEDNESDAY, APRIL 26, 2017
TEMPERATURE (DEGREES F)
MAX…..60 NORMAL…..60
MIN…..47 NORMAL…..42
MEAN….54 NORMAL…..51
DEPARTURE FROM 30-YEAR NORMAL…………………….+3
TOTAL DEPARTURE FOR THE MONTH……………………+93 [+3.6 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..11 DEPARTURE……….-3
TOTAL HEATING UNITS FOR THE MONTH………….411 DEPARTURE………-86
TOTAL HEATING UNITS FOR THE SEASON………..5313 DEPARTURE……..-668
TOTAL HEATING UNITS LAST SEASON TO DATE……4926 DIFFERENCE…….+387
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….29 ENE AT 4:04 A.M.
AERO……………………28 ENE AT 4:04 A.M.
ASOS……………………30 ENE AT 3:31 A.M.
DAVIS…………………..27 ENE AT 3:30 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY…………………25 ENE AT 4:04 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………25 ENE AT 4:06 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..24 ENE AT 4:07 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..9.5 ENE
ASOS………………….10.3
DAVIS………………….8.3 ENE [071 deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.43 DEPARTURE……+0.29
ASOS…………..0.45
TOTAL PRECIPITATION FOR THE MONTH……….6.63 DEPARTURE……+2.61
ASOS…………..6.75
TOTAL PRECIPITATION FOR THE YEAR……….20.75 DEPARTURE……+2.73
ASOS……………N/A ***
*** ASOS annual total not available due to erroneous readings
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0 DEPARTURE……..0.0
TOTAL SNOWFALL FOR THE MONTH…………….2.7 DEPARTURE…….-0.2
TOTAL SNOWFALL FOR THE SEASON…………..66.4 DEPARTURE…….+3.8
PRELIMINARY CLIMATE SUMMARY FOR APRIL 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
4/1 35/31/33/-8/2.21/2.7/000/00 40 ENE AERO 41 ENE RMY 41
4/2 53/30/42/+1/0.00/0.0/552/72 32 NW AERO 33 NW RMY 34
4/3 60/35/48/+6/0.00/0.0/685/89 21 W* AERO 20 NW RMY N/A
4/4 42/35/39/-3/0.78/0.0/000/00 41 ESE AERO 43 ESE RMY 42
4/5 41/35/38/-5/0.00/0.0/000/00 21 NNW AERO 20 NNW RMY N/A
4/6 55/35/45/+2/1.27/0.0/000/00 35 SSE AERO 37 S RMY 37 TSTM
4/7 53/38/46/+3/0.00/0.0/226/29 43 SSW AERO 47 SSW RMY 48
4/8 50/34/42/-2/0.00/0.0/666/85 37 WNW AERO 40 WNW RMY 39
4/9 65/34/50/+6/0.00/0.0/716/91 23 W AERO 23 W RMY N/A
4/10 77/45/61/+16/0.00/0.0/560/71 37 S AERO 37 S RMY 39
4/11 85/50/68/+23/0.00/0.0/642/81 28 S AERO 28 S RMY 30
4/12 68/47/58/+13/0.01/0.0/382/48 26 WNW AERO 28 WNW RMY N/A
4/13 58/39/49/+3/0.00/0.0/567/71 28 WNW AERO 31 NW RMY 30
4/14 62/40/51/+5/0.00/0.0/801/100 22 NNW AERO 22 NNW RMY 24
4/15 68/40/54/+7/0.01/0.0/675/84 40 SSW AERO 45 SSW RMY 45
4/16 86/55/71/+24/T/0.0/758/94 38 W* AERO 39 SW RMY 42
4/17 75/48/62/+15/0.00/0.0/405/50 37 W AERO 37 W RMY 43
4/18 52/35/44/-4/0.00/0.0/779/96 25 ENE AERO 23 ENE RMY 25
4/19 54/34/44/-4/0.06/0.0/431/53 31 S AERO 33 S RMY 34
4/20 58/42/50/+1/0.05/0.0/270/33 25 SSW AERO 24 SSW RMY 23
4/21 45/42/44/-5/0.50/0.0/000/00 26 ESE AERO 29 ESE RMY 28
4/22 44/40/42/-7/0.14/0.0/…/.. 22 NE AERO 22 NNE RMY 20
4/23 65/37/51/+1/0.00/0.0/…/.. 28 S AERO 26 S RMY 28
4/24 69/42/56/+6/0.00/0.0/…/.. 23 SSW*AERO 22 SSW*RMY N/A
4/25 49/42/46/-4/…./0.0/…/.. 35 NE AERO 36 NE RMY 35
4/26 60/47/54/+3/…./0.0/…/.. 29 ENE AERO 28 ENE RMY N/A
4/26 Low temp since midnight is 47F; normal low is now 42F
DAILY RECORDS FOR APRIL 2017
4/11/17: DAILY RECORD MAXIMUM TEMPERATURE OF 85F,
BREAKS PREVIOUS RECORD OF 78F SET IN 1945
4/11/17: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 50F,
TIES WITH PREVIOUS RECORD SET IN 1955
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR APRIL 27
HIGH 93 IN 1990
LOW 28 IN 1919
PRECIP 1.89 IN 1979
SNOWFALL 2.7 IN. IN 1993
PEAK GUST 65e MPH N IN 1941
RECORDS FOR APRIL 28
HIGH 92 IN 1990, 2009
LOW 26 IN 1947
PRECIP 2.41 IN 1904
SNOWFALL 10.0 IN. IN 1987
PEAK GUST 69 MPH NE 1967
TODAY’S REPORT PREPARED BY: Kaitlin Geagan
