Saturday, May 7, 2016
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, MAY 7, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME
CLOUDY AND COOL WITH DRIZZLE AND FOG TODAY…
The first sunshine of the month occurred on Friday
with nearly six hours of sun in total. No sunshine
on the first five days of May set a new record for
the least sunshine to start May. Clouds returned
today with showers overnight bringing a total of
0.13 inches of new rainfall. Light drizzle fell all
morning with only a trace of precipitation for the
six hours ending at 1 PM EST. A passing rain shower
after 1 PM brought a few hundredths of additional
rainfall this afternoon. Visibility has been poor
today, rising from 1/8 mile earlier this morning
to only 1/4-1/2 mile this afternoon.
Today’s Observations:
7 A.M.
Weather: Sky obscured with light drizzle and dense fog
Temperature: 44F; Dew Point: 44F; Wind: NE at 12 kts
Sea-level pressure: 29.89 ins. Hg, falling, then rising
Visibility: 1/8 mile
6-hr Max temp: 44F
6-hr Min temp: 43F
24-hr precip: 0.13 in.
BHO SA 1155 W2 X 1/8L-F 121/44/44/0512/989/ 8//// 55004
600// 70013 10044 20043
10 A.M.
Weather: Sky obscured with light drizzle and dense fog,
stratus drifting over summit
Temperature: 45F; Dew Point: 45F; Wind: NE at 10 kts
Sea-level pressure: 29.87 ins. Hg, falling, then rising
Visibility: 1/8 mile
3-hr precip: Trace
BHO SA 1455 W2 X 1/8L-F 116/45/45/0510/987/ STRA DRFTG OVR
SMT/ 8//// 55005 6000/
1 P.M.
Weather: Sky obscured with light drizzle and dense fog,
stratus drifting over summit
Temperature: 57F; Dew Point: 46F; Wind: NE at 4 kts (estimated)
Sea-level Pressure: 29.84 ins. HG, falling, then more slowly
Visibility: 1/4 mile, variable 1/8 to 1/2 mile
6-hr Max temp: 48F
6-hr Min temp: 44F
6-hr Precip: Trace
BHO SA 1755 W3 X 1/4VL-F 104/47/46/E0404/984/ STRA DRFTG OVR
SMT VSBY 1/8V1/2/ 8//// 56012 6000/ 10048 20044
SUMMARY FOR FRIDAY, MAY 6, 2016
TEMPERATURE (DEGREES F)
MAX…..54 NORMAL…..63
MIN…..43 NORMAL…..45
MEAN….49 NORMAL…..54
DEPARTURE FROM 30-YEAR NORMAL……………………..-5
TOTAL DEPARTURE FOR THE MONTH…………………….-46 [-7.9 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..16 DEPARTURE……….+5
TOTAL HEATING UNITS FOR THE MONTH………….115 DEPARTURE………+44
TOTAL HEATING UNITS FOR THE SEASON………..5107 DEPARTURE……..-999
TOTAL HEATING UNITS LAST SEASON TO DATE……6314 DIFFERENCE……-1207
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….28 ENE AT 11:03 A.M. *
ASOS……………………27 ENE AT 11:03 A.M.
DAVIS…………………..25 NNW AT 12:27 P.M. RMY 26
FASTEST MILE FOR YESTERDAY…………………19 E AT 12:23 P.M. *
MAXIMUM 2-MINUTE ASOS AVERAGE………………21 ENE AT 12:55 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..18 NE AT 12:55 P.M.
AVERAGE WIND SPEED AND DIRECTION………….11.9 ENE
ASOS………………….11.6
DAVIS…………………10.1 NE [043 Deg.]
* Last of several occurrences
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.13 DEPARTURE……+0.01
ASOS…………..0.12
TOTAL PRECIPITATION FOR THE MONTH……….1.45 DEPARTURE……+0.71
ASOS…………..1.43
TOTAL PRECIPITATION FOR THE YEAR……….18.39 DEPARTURE……-0.90
ASOS………….18.43
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0 DEPARTURE……..0.0
TOTAL SNOWFALL FOR THE MONTH…………..TRACE DEPARTURE……..0.0
TOTAL SNOWFALL FOR THE SEASON…………..57.5 DEPARTURE…….-5.7
PRELIMINARY CLIMATE SUMMARY FOR MAY CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/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
5/1 52/39/46/-7/…/T/000/00 21 S AERO 22 SE RMY 20
5/2 50/41/46/-7/…/0.0/000/00 20 NE AERO 21 NE RMY 18
5/3 48/43/46/-7/…/0.0/000/00 16 E AERO 16 E RMY 17
5/4 48/41/45/-9/…/0.0/000/00 33 NE AERO 35 NE RMY 34
5/5 44/41/43/-11/…/0.0/000/00 39 NNE AERO 41 NNE RMY 39
5/6 54/43/49/-5/…/0.0/…/.. 28 ENE AERO 29 N RMY 26
5/7 low temp since midnight is 43F; normal low now 45F
DAILY RECORDS FOR MAY 2016
5/1/16: DAILY RECORD SNOWFALL OF A TRACE,
TIES PREVIOUS RECORDS SET IN 1905, 1917, 1921, and 1995
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR MAY 7
HIGH 93F IN 1930
LOW 33F IN 1970
PRECIP 1.19 INCHES IN 2005
SNOWFALL TRACE IN 1967
PEAK GUST 66e MPH WNW IN 1940
RECORDS FOR MAY 8
HIGH 89F IN 2000
LOW 29F IN 1956
PRECIP 1.48 INCHES IN 1886
SNOWFALL TRACE IN 1898, 1947
PEAK GUST 68e MPH NNW IN 1943
TODAY’S REPORT PREPARED BY: Mike Iacono
