Sunday, May 8, 2016
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, MAY 8, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME
WARMER START TO THE DAY WITH A BAND OF SHOWERS AND
STORMS
Fog from this morning was quickly burned off as the
sun came out before the 7 o’clock observation. Visibility
had been under a mile but was up to 30 miles by the time
of the observation.
Clouds quickly moved in as a line of showers and thunderstorms
moved in from the west giving is 0.01 inches of rain by the 10
o’clock ob.
Today’s Observations:
7 A.M.
Weather: Broken Stratocumulus
Temperature: 50F; Dew Point: 49F; Wind: SSW at 12 kts
Sea-level pressure: 29.63 ins. Hg, falling unsteadily
Visibility: 30 miles, except 20 miles N-NE
6-hr Max temp: 51F
6-hr Min temp: 46F
24-hr precip: 0.05 in.
BHO SA 1155 E11 BKN 30 033/51/49/2112/963/ HAZY VSBY N-NE 20/
8/06/ 57002 MANUAL 70005 ASOS 70005 10051 20046
10 A.M.
Weather: Light Rain, Overcast Nimbostratus, Few Cumulus
Fractus
Temperature: 53F; Dew Point: 50F; Wind: NNE at 13 kts
Sea-level pressure: 29.57 ins. Hg, falling, then faster
Visibility: 25 miles
3-hr precip: 0.01
BHO SA 1455 E08 OVC 25L 015/53/50/2213/957/ FEW CU FRAC ALQDS
HAZY/ 8/72/ MANUAL 60001 ASOS 60001 58018
SUMMARY FOR SATURDAY, MAY 7, 2016
TEMPERATURE (DEGREES F)
MAX…..51 NORMAL…..64
MIN…..43 NORMAL…..45
MEAN….47 NORMAL…..55
DEPARTURE FROM 30-YEAR NORMAL……………………..-8
TOTAL DEPARTURE FOR THE MONTH…………………….-54 [-8.2 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..18 DEPARTURE……….+7
TOTAL HEATING UNITS FOR THE MONTH………….133 DEPARTURE………+51
TOTAL HEATING UNITS FOR THE SEASON………..5125 DEPARTURE……..-992
TOTAL HEATING UNITS LAST SEASON TO DATE……6314 DIFFERENCE……-1189
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….25 NE AT 6:56 A.M.
ASOS……………………25 NE AT 7:15 A.M.
DAVIS…………………..24 NE AT 6:57 A.M. RMY 23
FASTEST MILE FOR YESTERDAY…………………N/A
MAXIMUM 2-MINUTE ASOS AVERAGE………………16 NE AT 7:01 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..15 NE AT 6:58 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..7.8 NE
ASOS…………………..7.6
DAVIS………………….7.1 NE [043 Deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.05 DEPARTURE……-0.08
ASOS…………..0.12
TOTAL PRECIPITATION FOR THE MONTH……….1.50 DEPARTURE……+0.63
ASOS…………..1.48
TOTAL PRECIPITATION FOR THE YEAR……….18.44 DEPARTURE……-0.98
ASOS………….18.48
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 51/43/47/-8/…/0.0/…/.. 25 NE AERO 25 NE RMY 23
5/8 low temp since midnight is 46F; 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 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
RECORDS FOR MAY 9
HIGH 93F IN 2000
LOW 31F IN 1947
PRECIP 2.72 INCHES IN 1954
SNOWFALL 5.0 INS IN 1977 (RECORD FOR MAY)
PEAK GUST 70e MPH NE IN 1977
TODAY’S REPORT PREPARED BY: Robert Millette
