Monday, May 30, 2016
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, MAY 30, 2016 MEMORIAL DAY
ALL TIMES ARE IN EASTERN STANDARD TIME
RAIN SHOWERS AND CLOUDY SKIES FOR MEMORIAL DAY
Overnight rain showers brought 0.87 in. of precip. at the
7:00AM EST observation. An additional 0.07 in. fell in the
six hour period between 7:00AM and 1:00PM EST. Fog increased
from 7:00AM to 10:00AM but cleared away for 20 miles of visibility
by 1:00PM.
Temperatures were quick to climb today from 55F at 7:00AM to a
maximum of 69F by 1:00PM. Humidity remained high through the morning
into the early afternoon.
Today’s Observations:
7 A.M.
Weather: Few cumulus fractus in all directions, broken nimbostratus,
overcast altostratus
Temperature: 55F; Dew Point: 55F; Wind: estimated SE at 2 kts,
Wind: Light and variable
Sea-level pressure: 30.04 ins. Hg, rising, then falling
Visibility: 3 miles, thin fog
6-hr Max temp: 55F
6-hr Min temp: 52F
24-hr precip: 0.87 in.
BHO SA 1155 E70 BKN 95 OVC 3R-F 173/55/55/E1302/004/ FEW CUFRA ALQDS
WND L/V/ 8/72/ 58005 ASOS P0021 60080 70082 MANUAL 70087 10055 20052
10 A.M.
Weather: Thick fog
Temperature: 59F; Dew Point: 58F; Wind: estimated NW at 2 kts,
Wind: Light and variable
Sea-level pressure: 30.03 ins. Hg, rising, then falling
Visibility: 1/8 mile
BHO SA 1455 W3 X 1/8L-F 169/59/58/E3102/003/ WND L/V/
8//// 58004 ASOS P0001 60011 MANUAL 60006
1 P.M.
Weather: Broken altostratus, broken cirrus
Temperature: 69F; Dew Point: 65F; Wind: SSW at 8 kts
Sea-level pressure: 29.99 ins. Hg, falling, then more quickly
Visibility: 20 miles. thin fog in all directions
6-hr Max temp: 69F
6-hr Min temp: 55F
6-hr precip: 0.07 in.
BHO SA 1755 140 BKN 200 BKN 20 153/69/65/2108/999/ THN FG ALQDS/
8/011 58016 ASOS 60011 MANUAL 60007 10069 20055
SUMMARY FOR SUNDAY, MAY 29, 2016
TEMPERATURE (DEGREES F)
MAX…..72 NORMAL…..70
MIN…..51 NORMAL…..52
MEAN….62 NORMAL…..61
DEPARTURE FROM 30-YEAR NORMAL……………………..+1
TOTAL DEPARTURE FOR THE MONTH…………………….+17 [+0.4 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………3 DEPARTURE……….-3
TOTAL HEATING UNITS FOR THE MONTH………….253 DEPARTURE……….-5
TOTAL HEATING UNITS FOR THE SEASON………..5245 DEPARTURE…….-1047
TOTAL HEATING UNITS LAST SEASON TO DATE……6401 DIFFERENCE……-1156
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….18 NE AT 5:35 P.M.
ASOS……………………18 NE AT 4:19 P.M.
DAVIS…………………..17 NE AT 5:36 P.M. RMY 18
FASTEST MILE FOR YESTERDAY…………………12 NE AT 5:37 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………14 NE AT 3:36 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..12 NNE AT 3:35 A.M.
AVERAGE WIND SPEED AND DIRECTION………….7.5 NE
ASOS………………….8.0
DAVIS…………………6.7 NNE [030 Deg.]
* Last of several occurrences
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.87 DEPARTURE……+0.73
ASOS…………..0.82
TOTAL PRECIPITATION FOR THE MONTH……….3.13 DEPARTURE……-0.67
ASOS…………..2.09
TOTAL PRECIPITATION FOR THE YEAR……….20.07 DEPARTURE……-2.28
ASOS………….20.33
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/-7/0.08/T/000/00 21 S AERO 22 SE RMY 20
5/2 50/41/46/-7/0.31/0.0/000/00 20 NE AERO 21 NE RMY 18
5/3 48/43/46/-7/0.16/0.0/000/00 16 E AERO 16 E RMY 17
5/4 48/41/45/-9/0.53/0.0/000/00 33 NE AERO 35 NE RMY 34
5/5 44/41/43/-11/0.30/0.0/000/00 39 NNE AERO 41 NNE RMY 39
5/6 54/43/49/-5/0.13/0.0/360/42 28 ENE AERO 29 N RMY 26
5/7 51/43/47/-8/…/0.0/000/00 25 NE AERO 25 NE RMY 23
5/8 60/46/53/-2/…/0.0/284/33 47 W AERO 53 W RMY 49
5/9 65/43/54/-1/0.00/0.0/743/86 40 W AERO 44 W RMY 40
5/10 69/40/55/0/0.00/0.0/806/93 22 W AERO 25 WNW RMY 22
5/11 76/50/63/+7/0.00/0.0/808/93 22 WNW AERO 23 WNW*RMY 22
5/12 75/54/65/+9/0.00/0.0/819/94 23 NNE AERO 25 S RMY 23
5/13 74/52/63/+7/0.21/0.0/079/09 27 S AERO 27 S RMY 26
5/14 78/54/66/+9/0.00/0.0/656/75 35 SSW*AERO 40 SSW RMY 37
5/15 60/41/51/-6/0.00/0.0/588/67 50 W AERO 54 W RMY 49
5/16 58/38/48/-9/0.00/0.0/800/91 45 W* AERO 51 WNW RMY 49
5/17 69/47/58/+1/0.00/0.0/344/39 32 W AERO 38 W RMY 38
5/18 64/48/56/-2/0.00/0.0/804/91 24 NE AERO 26 NNW RMY N/A
5/19 66/49/58/0/0.26/0.0/…/.. 23 WNW AERO 26 WNW RMY 25
5/20 73/46/60/+2/0.00/0.0/…/.. 20 SSE AERO 22 SSE RMY 21
5/21 74/53/64/+5/0.00.0.0/…/.. 21 S AERO 23 S RMY 21
5/22 64/53/59/0/T/0.0/…/.. 26 ENE AERO 29 ENE RMY 26
5/23 74/51/63/+4/T/0.0/…/.. 22 ENE AERO 31 ENE RMY N/A
5/24 56/50/53/-6/…/0.0/…/.. 30 ENE AERO 31 ENE RMY 29
5/25 86/51/69/+9/…/0.0/…/.. 25 W AERO 28 W RMY 25
5/26 86/64/75/+15/0.00/0.0/…/.. 21 SE AERO 23 SE RMY 21
5/27 81/60/71/+11/0.00/0.0/…/.. 26 S AERO 30 S RMY 29
5/28 92/63/78/+17/0.00/0.0/…/.. 22 SSW AERO 22 SSW RMY N/A
5/29 72/51/62/+1/…/0.0/…/.. 18 NE AERO 20 NE RMY 18
5/30 low temp since midnight is 52F; normal low now 52F
* Last of several occurrences
DAILY RECORDS FOR MAY 2016
5/1/16: DAILY RECORD SNOWFALL OF A TRACE,
TIES PREVIOUS RECORDS SET IN 1905, 1917, 1921, and 1995
5/28/16: DAILY RECORD MAXIMUM TEMP. OF 92F,
PREVIOUS RECORD OF 90F SET IN 1914
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR MAY 30
HIGH 93F IN 1929
LOW 39F IN 1949,1961
PRECIP 1.47 INS 1948
PEAK GUST 61e MPH NW IN 1945
RECORDS FOR MAY 31
HIGH 92F IN 1944,1987
LOW 35F IN 1961
PRECIP 5.02 INS 1984 (RECORD FOR MAY)
PEAK GUST 54e MPH WNW IN 1945
TODAY’S REPORT PREPARED BY: Cece Borries-Strigle
