Tuesday, May 7, 2024

BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

TUESDAY, MAY 7, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0431E
SUNSET:  1851E

PLENTY OF SUNSHINE AND WARM TEMPERATURES TODAY ON BLUE HILL….

Quite the spring day in progress area the region today with
abundant sunshine under mainly clear skies and above normal
temperatures.

Temperatures have warmed once again into the mid 70s early this
afternoon. The dew point is lower than it was yesterday with
values in the mid 40s, so the air feels much more comfortable
today, making for very fine conditions.

The wind spent some time this morning off the ocean and was a
bit gusty for a time, however it became light and variable by
mid-late and morning and has remained that way into this
afternoon. The average speed for the day so far is around 9mph.
The peak gust occurred early this morning, just before the 7am
observation with a value of 23mph.

Visibility has been decent today despite a bit of haziness due
to pollen. The view has been around 60-70 miles all day.

The maximum temperature so far today is 75F degrees, which is
10 degrees above the normal high of 65F. The minimum temperature
since midnight is 55F degrees, which is 9 degrees above the
normal low of 46F.

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Today’s Observations:

7 A.M.
Weather: Clear, few altocumulus/castellanus distant N-SE-SW,
few cirrus distant ESE-S-SW
Temperature: 61F; Dew Point: 48F; Relative Humidity: 61%
Wind: NE @ 12G20 kts
Sea-level pressure: 1010.1 mb; 29.83 in. Hg: rising, then more slowly
Visibility: 60 miles
6-hr Max temp: 61F
6-hr Min temp: 55F
24-hr Precip:  0.00 inches
BHO SA 1155 CLR 60 101/61/48/0412G20/983/ FEW AC/ACC DSNT N-SE-SW
FEW CI DSNT ESE-S-SW/ 8/051 51010 10061 20055

10 A.M.
Weather: Clear, few small cumulus distant WSW-N, few altocumulus/
castellanus distant NE-ENE, few cirrus distant ESE-SSW
Temperature: 66F; Dew Point: 45F; Relative Humidity: 46%
Wind: ENE @ 6 kts, wind light and variable
Sea-level pressure: 1009.8 mb; 29.82 in. Hg: steady, then falling
Visibility: 60 miles
3-hr Precip:  0.00 inches
BHO SA 1455 CLR 60 098/66/45/0706/982/ FEW SML CU DSNT WSW-N FEW AC/ACC
DSNT NE-ENE FEW CI DSNT ESE-SSW WND L/V/ 8/181 58003

1 P.M.
Weather: Clear, few small cumulus all quadrants
Temperature: 73F; Dew Point: 46F; Relative Humidity: 39%
Wind: W @ 3 kts, wind light and variable
Sea-level pressure: 1006.7 mb; 29.73 in. Hg: falling, then more rapidly
Visibility: 70 miles
6-hr Max temp: 74F
6-hr Min temp: 61F
6-hr Precip:  0.00 inches
BHO SA 1755 CLR 70 067/73/46/2603/973/ FEW SML CU ALQDS WND L/V/
8/100 58031 10074 20061

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SUMMARY FOR MONDAY, MAY 6, 2024

TEMPERATURE (DEGREES F)
MAX…….75   NORMAL…..64
MIN…….46   NORMAL…..45
MEAN……61   NORMAL…..55

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………….+6
TOTAL DEPARTURE FOR THE MONTH……………………-11 [-2.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY…………….4  DEPARTURE……..-7
TOTAL HEATING UNITS FOR THE MONTH……………76  DEPARTURE……..+8
TOTAL HEATING UNITS FOR THE SEASON…………5233  DEPARTURE……-722
TOTAL HEATING UNITS LAST SEASON TO DATE…….5055  DEPARTURE……+178

COOLING DEGREE DAYS (SEASON: JAN 2024 THRU DEC 2024)
TOTAL COOLING UNITS FOR YESTERDAY…………….0  DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE MONTH…………….0  DEPARTURE……..-2
TOTAL COOLING UNITS FOR THE SEASON……………0  DEPARTURE……..-5
TOTAL COOLING UNITS LAST SEASON TO DATE……….9  DEPARTURE……..-9

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)……….E20 SW   @  04:33 P.M.
VECTOR #1 (1-Sec)……….18 SW   @  04:19 P.M.
VECTOR #2 (1-Sec)……….20 SW   @  04:39 P.M.
DAVIS #1……………….19 S    @  04:19 P.M.
DAVIS #2 ………………19 SW   @  04:39 P.M.
RMY #1 (Instantaneous)…..20 SW   @  04:31 P.M.
RMY #2 (Instantaneous)…..20 SW   @  04:39 P.M.
MERLIN………………….M
RICHARDS (C5C) (Inst)……18      @  04:19 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………14 SW   @  04:26 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..14      @  04:27 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..14      @  04:27 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………13 SSW  @  04:28 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………14 SSW  @  04:33 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..14 SW   @  04:27 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..14 SW   @  04:27 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………12      @  03:58 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….7.6 WSW [183 total miles] VECTOR #1……………..8.1
VECTOR #2……………..8.1
DAVIS #1………………7.7 SW
DAVIS #2………………8.0 WSW
RMY #1………………..8.0 SW
RMY #2………………..8.1 SW
RICHARDS (C5C)…………8.0

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.13
TOTAL PRECIPITATION FOR THE MONTH…………..0.66 DEPARTURE…..-0.10
TOTAL PRECIPITATION FOR THE YEAR (2024)…….25.62 DEPARTURE…..+6.08

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

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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/…/..         18 ESE VEC1 18 ESE RMY 18
5/2   69/44/57/+3/0.21/0.0/…/..         35 NE  VEC1 36 NE  RMY 35 TSTM
5/3   57/44/51/-3/0.02/0.0/…/..         24 NE  VEC1 24 NE  RMY 25
5/4   55/44/50/-4/0.00/0.0/…/..         22 ENE VEC1 21 NE  RMY 21
5/5   51/42/47/-8/0.35/0.0/…/..         21 S   VEC1 22 S   RMY 21
5/6   75/46/61/+6/0.02/0.0/…/..         20 SW  VEC1 18 SW  RMY 20

5/7 The low since midnight is 55F, the daily normal low is 46F.

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MAY DAILY RECORDS TO DATE

NONE…

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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: Matt Douglas