Friday, May 7, 2021
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
FRIDAY, MAY 7, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0431E
SUNSET: 1851E
DRY WEATHER HANGS AROUND…
After a raw, chilly and wet stretch earlier this week, we have
lined up our 2nd consecutive dry day. Sunshine was
plentiful under a gentle NE wind during the morning, though
becoming mostly cloudy into the afternoon hours. Temperatures
have reached the low-60s with visibility surprisingly good at
70 miles despite seasonal pollen hanging in the air.
Yesterday’s drought monitor was updated and stats indicate
an improved situation. Much of eastern MA is now drought
free. While the deficit at Blue Hill is just shy of 3 inches,
it does not constitute “abnormally dry” conditions.
The high so far today is 61F, this is 3 degrees below the
normal high of 64F. The low since midnight is 45F, which
is equal to the daily normal low of 45F.
Today’s Observations:
7 A.M.
Weather: Clear (few cirrus N-SE)
Temperature: 52F; Dew Point: 32F; Relative Humidity: 46%
Wind: ENE at 8 kts
Sea-level pressure: 29.98 in Hg, rising, then rising more rapidly
Visibility: 70 mileS
6-hr Max temp: 52F
6-hr Min temp: 45F
24-hr Precip: 0.00 ins.
24-hr Snow: 0.0 ins.
Snow Depth: 0.0 ins.
BHO SA 1155 CLR 70 153/52/32/0608/998/ FEW CI N-SE/ 8/001
53008 10052 20045
10 A.M.
Weather: Scattered Cumulus
Temperature: 59F; Dew Point: 41F; Relative Humidity: 51%
Wind: E @ 7kts
Sea-level pressure: 29.99 in Hg; rising steadily
Visibility: 75 miles
3-hr Precip: 0.00 ins.
3-hr Snow: 0.0 ins.
BHO SA 1455 50 SCT 75 155/59/41/0807/999/ 8/100 52002
1 P.M.
Weather: Broken Cumulus (Virga distant WSW)
Temperature: 56F, Dew point: 35F; Relative Humidity: 45%
Wind: EES @ 9 kts
Sea-level pressure: 29.96 in Hg; falling, then steady
Visibility: 75 miles (15 miles WSW)
6-hr Max temp: 61F
6-hr Min temp: 52F
6-hr Precip: 0.00 ins.
6-hr Snow: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 55 BKN 75 147/56/35/1109/996/ VIRGA DSNT WSW
VSBY 15 WSW/ 8/100 56008 10061 20052
SUMMARY FOR THURSDAY, MAY 6, 2021
TEMPERATURE (DEGREES F)
MAX…….64 NORMAL…..64
MIN…….45 NORMAL…..45
MEAN……55 NORMAL…..54
DEPARTURE FROM 30-YEAR (1981-2010) NORMAL…….. +1
TOTAL DEPARTURE FOR THE MONTH…………………-3 [-0.7 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL THRU JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………10 DEPARTURE…….-1
TOTAL HEATING UNITS FOR THE MONTH……………72 DEPARTURE…….+1
TOTAL HEATING UNITS FOR THE SEASON…………5413 DEPARTURE…..-693
TOTAL HEATING UNITS LAST SEASON TO DATE…….5575 DEPARTURE…..-162
COOLING DEGREE DAYS (SEASON JAN THRU DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………… 0 DEPARTURE……. 0
TOTAL COOLING UNITS FOR THE MONTH…………… 0 DEPARTURE…….-2
TOTAL COOLING UNITS FOR THE SEASON………….. 0 DEPARTURE…….-4
TOTAL COOLING UNITS LAST SEASON TO DATE……… 2 DEPARTURE…….-2
PEAK WIND GUST (MPH):
420C/Official…………..33 NW @ 8:31 A.M.
AEROVANE (south tower)…..38 NNW @ 8:04 A.M.
ASOS…………………..33 NNW @ 8:31 A.M.
DAVIS #1……………….33 WNW @ 8:03 A.M.
DAVIS #2 (south tower)…..37 NNW @ 8:03 A.M.
RMY……………………39 @ 8:31 A.M.
VECTOR…………………39 @ 8:32 A.M.
MERLIN…………………36
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………24 NW @ 8:31 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….22 WNW @ 10:53 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………23 NW @ 8:30 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………25 NW @ 8:25 A.M.
MAXIMUM 2-MINUTE RMY AVERAGE………………..22 NNW @ 8:27 A.M.
MAXIMUM 2-MINUTE VECTOR AVERAGE……………..23 @ 7:38 A.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…… 11.9 NW [286 total miles] ASOS………………… 11.6
DAVIS #1…………….. 12.2 NW
DAVIS #2…………….. 12.4 NW
RMY…………………. 11.2 NNW
VECTOR………………. 11.9
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….0.00 DEPARTURE….-0.13
ASOS………….0.00
TOTAL PRECIPITATION FOR THE MONTH………….1.39 DEPARTURE….+0.65
ASOS………….1.35
TOTAL PRECIPITATION FOR THE YEAR………….16.45 DEPARTURE….-2.84
ASOS………..16.63
PRELIMINARY CLIMATE SUMMARY FOR MAY 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
05/01 62/38/50/-3/0.06/0.0/…/.. 31 WNW AERO 35 WNW RMY 40
05/02 76/48/62/+9/0.01/0.0/…/.. 41 SW AERO 41 SW RMY 46
05/03 67/48/58/+5/0.07/0.0/…/.. 21 E AERO 20 E RMY 20
05/04 50/44/47/-7/…./0.0/…/.. 36 NNE AERO 32 NNE RMY 37
05/05 48/44/46/-8/…./0.0/…/.. 18 ESE AERO 14 ESE RMY 17
05/06 64/45/55/+1/0.00/0.0/…/.. 33 NW AERO 38 NNW RMY 39
05/07 The low since midnight is 45F, the daily normal low is 45F
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: Andrew Swanson
