Saturday, May 30, 2015
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, MAY 30, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME
THICK FOG THIS MORNING GIVES WAS TO MOSTLY SUNNY SKIES AND
WARM TEMPERATURES
Temperatures continue to be warmer than usual with today’s
temperatures reaching the 80’s by the 1 o’clock observation.
There was a thick fog this morning which has given way to hazy
conditions with dew points in the 60s keeping the humidity much
higher today than it was yesterday.
A few clouds moved into the region by the 10 o’clock observation
and have now overspread the region ahead of some rain moving in
for Sunday.
BHO Driest Mays, inches (1885-2014)
1) 0.50 in 1944
2) 0.62 in 1964
3) 0.89 in 1911
4) 1.11 in 1899
5) 1.20 in 1959
Today’s Observations:
7 A.M.
Weather: Fog, break in fog directly overhead
Temperature: 62F; Dew Point: 60F; Wind: S at 11 kts,
Sea-level pressure: 30.20 ins. Hg, rising, then steady
Visibility: 6 miles. Thick Fog
6-hr Max temp: 62F
6-hr Min temp: 55F
24-hr precip: none
BHO SA 1155 E50 –OVC 6 230/62/60/1811/020/ THK FOG ALQDS BINOVC OVHD
FEW CU W-NNW 8/1// 51005 10062 20055
10 A.M.
Weather: Few cumulus, light distant haze
Temperature: 78F; Dew Point: 63F; Wind: SW at 13 kts
Sea-level pressure: 30.18 ins. Hg, steady then falling
Visibility: 20 miles, distant haze
BHO SA 1455 CLR 20 223/78/63/2213/018/ FEW CU ALQDS LGT DSNT HZ ALQDS
58007
1 P.M.
Weather: Clear, few cirrocumulus overhead, few cumulus SW-NE,
few altostratus SW-NW
Temperature: 83F; Dew Point: 61F; Wind: SW at 19 kts
Sea-level pressure 30.16 ins. Hg, decreasing then more rapidly
Visibility: 40 miles, distant haze
6-hr Max temp: 83F
6-hr Min temp: 62F
BHO SA 1755 CLR 40 216/83/61/2219/016/ FEW CC OVHD FEW CU/CS SW-NE
FEW AS SW-NW LGT DSNT HZ 8/089 58007 10083 20062
SUMMARY FOR FRIDAY, MAY 29, 2015
TEMPERATURE (DEGREES F)
MAX…..77 NORMAL…..70
MIN…..58 NORMAL…..52
MEAN….68 NORMAL…..61
DEPARTURE FROM 30-YEAR NORMAL…………………..+7
TOTAL DEPARTURE FOR THE MONTH………………….+150 [+5.2 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………0 DEPARTURE………..-5
TOTAL HEATING UNITS FOR THE MONTH………….130 DEPARTURE………-128
TOTAL HEATING UNITS FOR THE SEASON………..6401 DEPARTURE………+109
TOTAL HEATING UNITS LAST SEASON TO DATE……6377 DIFFERENCE………+31
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..3 DEPARTURE……….+2
TOTAL COOLING UNITS FOR THE MONTH………….44 DEPARTURE………+25
TOTAL COOLING UNITS FOR THE SEASON…………44 DEPARTURE………+23
TOTAL COOLING UNITS LAST SEASON TO DATE…….31 DIFFERENCE……..+13
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………18 ENE AT 8:17 A.M.
ASOS…………………..20 ENE AT 8:18 A.M.
DAVIS………………….17 NW AT 1:07 A.M. RMY 19
FASTEST MILE FOR YESTERDAY………………..13 NW AT 8:18 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..14 ENE AT 11:52 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….13 NW AT 1:08 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..9.5 ENE
ASOS………………….10.2
DAVIS………………….8.3 NE [36 deg.]
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………..0.63 DEPARTURE…..-3.19
ASOS……………0.63
TOTAL PRECIPITATION FOR THE YEAR………..18.55 DEPARTURE…..-3.69
ASOS…………….N/A ***
*** ASOS annual totals 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……………..0.0 DEPARTURE……0.0
TOTAL SNOWFALL FOR THE SEASON…………..150.8 DEPARTURE….+88.1
PRELIMINARY CLIMATE SUMMARY FOR MAY CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOWFALL/SUN(MIN.)/SUN(%)/ PEAK GUST/RMY 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 52/37/45/-8/0.00/0.0/354/42 21 NE RMY 20
5/2 63/35/49/-4/0.00/0.0/668/79 20 S RMY 20
5/3 74/44/59/+6/0.00/0.0/509/60 22 S RMY 22
5/4 83/47/65/+11/0.00/0.0/783/92 39 SSW RMY 45
5/5 77/56/67/+13/0.03/0.0/222/26 29 SW RMY N/A
5/6 74/54/64/+10/0.00/0.0/574/67 24 SSW RMY 25
5/7 84/52/68/+13/0.00/0.0/824/96 29 S RMY 32
5/8 74/44/59/+4/0.00/0.0/809/94 27 NNE RMY 26
5/9 77/44/61/+6/0.00/0.0/509/59 30 S RMY 32
5/10 88/60/74/+19/0.00/0.0/692/80 28 SSW RMY 30
5/11 84/48/66/+10/0.00/0.0/529/61 30 NE RMY 31
5/12 84/47/66/+10/0.24/0.0/287/33 33 WNW RMY 37
5/13 67/47/57/+1/0.00/0.0/820/94 31 WNW RMY N/A
5/14 70/44/57/+0/0.00/0.0/848/97 22 NW RMY 22
5/15 73/51/62/+5/0.00/0.0/491/56 20 WSW RMY 21
5/16 68/53/61/+4/T/0.0/053/06 23 S RMY 24
5/17 79/50/65/+8/T/0.0/783/89 21 NE RMY N/A
5/18 62/48/55/-3/…./0.0/538/61 25 NE RMY N/A
5/19 63/50/57/-1/0.36/0.0/000/00 24 S RMY 26
5/20 66/46/56/-2/0.00/0.0/…/.. 32 WNW RMY 37
5/21 66/43/55/-4/…./0.0/…/.. 24 S RMY 24
5/22 73/49/61/+2/T/0.0/…/.. 32 NW RMY 36
5/23 64/40/52/-7/0.00/0.0/…/.. 28 WNW RMY 32
5/24 81/50/66/+7/0.00/0.0/…/.. 28 SSW RMY 31
5/25 80/56/68/+8/0.00/0.0/…/.. 29 SSW RMY 31
5/26 83/61/72/+12/0.00/0.0/…/.. 30 SSW RMY N/A
5/27 82/62/72/+12/T/0.0/…/.. 36 SSW RMY 41
5/28 83/61/72/+11/0.00/0.0/…/.. 30 SSW RMY 34
5/29 77/58/68/+7/0.00/0.0/…/.. 18 ENE RMY 19
5/30 low since midnight is 55F; normal low is now 52F
DAILY RECORDS FOR MAY 2015
NONE SO FAR.
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: Robert Millette
