Access to this content requires acceptance of our Data Use & Privacy Policy.
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SUNDAY, MAY 26, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0413E
SUNSET: 1910E
EARLY MORNING SHOWERS LEAD TO UNSEASONABLY WARM CONDITIONS
ON BLUE HILL TODAY….
We had some early morning showers in the area that yielded us
about 0.30″ of rain here at the observatory. Once the rain
and fog moved out of the area, we had some sky clearing and
bright sunshine. The increase of sun and heat has also brought
in the higher dew points but overall it’s been a great day to
enjoy the sunshine.
The temperature was in the upper 50’s this morning and quickly
rose to 80F before a sea breeze came through to bring a little
reprieve. Dew points have hovered in the low to mid 60s today
and with little wind it has been a very sticky feeling compared
to the past few days.
Winds have been very light and variable at times. Before the
1pm observation we had a shift from the SSW to the ENE, bringing
a cooler sea breeze to the hill.
Visibility has decreased as the day progressed due to hazy
conditions. This morning the visibility was impacted to the NNW-N
with fog from the passing showers.
The maximum temperature so far today is 80F degrees, which is
11 degrees above the normal high of 69F. The minimum temperature
since midnight is 58F degrees, which is 7 degrees above the
normal low of 51F.
————————————————————–
Today’s Observations:
7 A.M.
Weather: Light rain showers, few breaks in overcast NNW-N,
precipitation very light, wind light
Temperature: 58F; Dew Point: 58F; Relative Humidity: 100%
Wind: SSE @ 5 kts, wind light
Sea-level pressure: 1013.1 mb; 29.92 in. Hg: rising unsteadily
Visibility: 10 miles, 1 mile N-E-SSE
6-hr Max temp: 58F
6-hr Min temp: 57F
24-hr Precip: 0.28 inches
BHO SA 1155 E45 BKN 60 BKN 100 OVC RW- 10 140/58/58/1505/994/
FEW BINOVC NNW-N PCPN VRY LGT RW-B00 VSBY 1 N-E-SSE WND LGT/
8/780 51012 6028/ 70028 10057 20058
10 A.M.
Weather: Thin scattered cirrus
Temperature: 69F; Dew Point: 62F; Relative Humidity: 79%
Wind: NW @ 4 kts, wind light and varible
Sea-level pressure: 1014.9 mb; 29.97 in. Hg: rising, then more
rapidly
Visibility: 30 miles, hazy
3-hr Precip: 0.02 inches
BHO SA 1455 SCT 110 30 149/69/62/2104/997/ FEW CU ALQDS HAZY
WND L/V/ 8/230 6002/ 53009
1 P.M.
Weather: Scattered cumulus, scattered altocumulus, scattered
cirrus
Temperature: 75F; Dew Point: 49F; Relative Humidity: 40%
Wind: ENE @ 5 kts, wind light, wind shift ENE at 12:36pm
Sea-level pressure: 1011.0 mb; 29.96 in. Hg: falling then rising
Visibility: 20 miles, hazy
6-hr Max temp: 80F
6-hr Min temp: 58F
6-hr Precip: 0.00 inches
BHO SA 1755 45 SCT 110 SCT 250 SCT 20 147/77/65/0605/996/ HAZY
WSHFT 36 WND LGT/ 8/251 55002 10080 20058
————————————————————–
SUMMARY FOR SATURDAY, MAY 25, 2024
TEMPERATURE (DEGREES F)
MAX…….80 NORMAL…..69
MIN…….55 NORMAL…..51
MEAN……68 NORMAL…..60
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+8
TOTAL DEPARTURE FOR THE MONTH…………………….+25 [+0.8 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY…………….0 DEPARTURE……..-6
TOTAL HEATING UNITS FOR THE MONTH…………..208 DEPARTURE…….-16
TOTAL HEATING UNITS FOR THE SEASON…………5365 DEPARTURE……-746
TOTAL HEATING UNITS LAST SEASON TO DATE…….5171 DEPARTURE……+194
COOLING DEGREE DAYS (SEASON: JAN 2024 THRU DEC 2024)
TOTAL COOLING UNITS FOR YESTERDAY…………….3 DEPARTURE……..+2
TOTAL COOLING UNITS FOR THE MONTH……………23 DEPARTURE……..+7
TOTAL COOLING UNITS FOR THE SEASON…………..23 DEPARTURE……..+4
TOTAL COOLING UNITS LAST SEASON TO DATE………25 DEPARTURE……..-2
PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,
F420C, Contacting, Merlin, and Richards are all Main Tower.
E=Estimated
F420C (Official)……….E24 S @ 06:04 P.M.
VECTOR #1 (1-Sec)……….23 SSW @ 05:41 P.M.
VECTOR #2 (1-Sec)……….24 S @ 06:23 P.M.
DAVIS #1……………….28 S @ 06:04 P.M.
DAVIS #2 ………………29 SSE @ 06:04 P.M.
RMY #1 (Instantaneous)…..25 SSW @ 05:40 P.M.
RMY #2 (Instantaneous)…..25 S @ 06:23 P.M.
MERLIN…………………23 S
RICHARDS (C5C) (Inst)……24 @ 06:04 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………18 SSW @ 05:39 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..17 @ 07:15 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..18 @ 03:39 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………17 S @ 06:25 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………20 S @ 06:05 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..17 SSW @ 03:40 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..18 SSW @ 05:02 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………17 @ 05:42 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….8.9 SSW [214 total miles]
VECTOR #1……………..9.3
VECTOR #2……………..9.6
DAVIS #1………………9.0 SW
DAVIS #2………………9.5 SW
RMY #1………………..9.0 W
RMY #2………………..9.6 W
RICHARDS (C5C)…………9.4
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.28 DEPARTURE…..+0.15
TOTAL PRECIPITATION FOR THE MONTH…………..3.92 DEPARTURE…..+0.91
TOTAL PRECIPITATION FOR THE YEAR (2024)…….28.88 DEPARTURE…..+7.09
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 (2023-2024)……26.8 DEPARTURE…..-42.9
————————————————————–
PRELIMINARY CLIMATE SUMMARY FOR MAY CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN)/SUN(%)/PEAK GUST/VEC1/RMY GUST
PEAK GUST: F420C (Official)
VEC1: Vector #1 1-second gust
RMY: R.M. Young #1 wind gust recording system (Instantaneous)
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M: Missing data
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
5/1 53/42/48/-5/0.06/0.0/177/21 18 ESE VEC1 18 ESE RMY 18
5/2 69/44/57/+3/0.21/0.0/535/63 35 NE VEC1 36 NE RMY 35 TSTM
5/3 57/44/51/-3/0.02/0.0/408/48 24 NE VEC1 24 NE RMY 25
5/4 55/44/50/-4/0.00/0.0/589/69 22 ENE VEC1 21 NE RMY 21
5/5 51/42/47/-8/0.35/0.0/000/00 21 S VEC1 22 S RMY 21
5/6 75/46/61/+6/0.02/0.0/343/40 20 SW VEC1 18 SW RMY 20
5/7 78/55/67/+12/0.00/0.0/851/99 23 NW VEC1 24 NE RMY 23
5/8 62/49/56/+1/0.60/0.0/078/09 30 S VEC1 31 S RMY 31 TSTM
5/9 63/45/54/-2/0.00/0.0/588/68 33 NW VEC1 33 NW RMY 34
5/10 56/42/49/-7/0.00/0.0/572/66 28 ENE VEC1 27 ENE RMY 27
5/11 55/39/47/-9/0.00/0.0/617/71 26 ENE VEC1 26 NE RMY 27
5/12 60/41/51/-6/T/0.0/305/35 16 WSW VEC1 15 SW RMY 15
5/13 68/45/57/0/0.00/0.0/663/76 25 S VEC1 25 SE RMY 26
5/14 76/48/62/+5/T/0.0/718/82 33 SSW VEC1 33 SSW RMY 32
5/15 73/53/63/+6/0.46/0.0/079/09 24 ENE VEC1 24 E RMY 24
5/16 56/52/54/-4/1.02/0.0/141/16 32 ENE VEC1 32 ENE RMY 31
5/17 66/50/58/0/0.00/0.0/662/75 29 ENE VEC1 28 ENE RMY 27
5/18 58/50/54/0/0.26/0.0/000/00 32 NE VEC1 33 NE RMY 34
5/19 53/48/51/-7/0.22/0.0/000/00 30 NE VEC1 30 NE RMY 30
5/20 65/48/57/-2/0.00/0.0/452/51 18 S VEC1 17 SSE RMY 18
5/21 84/50/67/+8/0.00/0.0/648/73 22 SSW VEC1 22 SSW RMY 22
5/22 88/56/72/+13/0.00/0.0/854/96 32 SSW VEC1 32 SSW RMY 33
5/23 75/61/68/+9/0.42/0.0/…/.. 31 SSW VEC1 30 SSW RMY 31 TSTM
5/24 82/59/71/+11/0.00/0.0/…/.. 38 W VEC1 38 W RMY 37
5/25 80/55/68/+8/0.00/0.0/…/.. 24 S VEC1 23 SW RMY 25
5/26 The low since midnight is 58F, the daily normal low is 51F.
————————————————————–
MAY DAILY RECORDS TO DATE
NONE…
————————————————————–
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR MAY 26
HIGH 94F IN 2010
LOW 37F IN 1972,2013
PRECIP 1.73 INS IN 2003
SNOWFALL TRACE IN 1967 (Fell as ice pellets in nor’easter)
PEAK GUST 62 MPH NE IN 1967
RECORDS FOR MAY 27
HIGH 92F IN 1914
LOW 36F IN 1915
PRECIP 1.40 INS IN 1898
PEAK GUST 55 S IN 1956
TODAY’S REPORT PREPARED BY: Amanda Joly
