Friday, April 26, 2024

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

FRIDAY, APRIL 26, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0446E
SUNSET:  1839E

A BEAUTIFUL DAY AT BLUE HILL TODAY WITH CLEAR SKIES AND
OVERALL LOWER WIND….

What a wonderful way to welcome the weekend with plenty of
sunshine and clear skies! While we are still below normal
temperatures, it feels so much nicer out there today, thanks
in part to the lower wind speeds and a slight bump in dew point
values.

Temperatures remain below normal once again, though not as cold
as yesterday. We started in the low 40’s early this morning and
have rebounded quite nicely to the low 50’s. Dew Points were in
the mid 30’s and have dropped to the mid 20’s this afternoon.

The wind has been light today with the exception of a wind gust
early this morning. Our average for the day is only about 9 mph
so far and our current peak gust is around 22 mph, which occurred
around 8:30am.

Visibility has been hovering around 60-70 miles today, thanks to
the lingering dry air mass over the region keeping the dew points
low. There is a bit of haziness from the pollen, however it has
not impacted the overall visibility.

The maximum temperature so far today is 54F degrees, which is
7 degrees below the normal high of 61F. The minimum temperature
since midnight is 32F degrees, which is 10 degrees below the
normal low of 42F.

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Today’s Observations:

7 A.M.
Weather: Clear
Temperature: 41F; Dew Point: 35F; Relative Humidity: 77%
Wind: NE @ 6 kts, wind light
Sea-level pressure: 1032.7 mb; 30.50 in. Hg: rising unsteadily
Visibility: 60 miles
6-hr Max temp: 41F
6-hr Min temp: 32F
24-hr Precip:  0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 CLR 60 327/41/35/4006/050/ WND LGT/ 8/000 52020 10041 20032

10 A.M.
Weather: Clear, few stratocumulus ESE-S-SSW
Temperature: 48F; Dew Point: 25F; Relative Humidity: 40%
Wind: ENE @ 5 kts, wind light and variable
Sea-level pressure: 1033.5 mb; 30.52 in. Hg: rising, then more slowly
Visibility: 70 miles
3-hr Precip:  0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 CLR 70 335/48/25/0705/052/ FEW SC ESE-S-SSW WND L/V/
8/500 51008

1 P.M.
Weather: Clear, few cumulus distant ESE-S-W, few cirrus distant W-NW
Temperature: 54F; Dew Point: 24F; Relative Humidity: 31%
Wind: SSW @ 5 kts, wind light and variable
Sea-level pressure: 1032.3 mb; 30.48 in. Hg: falling unsteadily
Visibility: 60 miles
6-hr Max temp: 54F
6-hr Min temp: 41F
6-hr Precip:  0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 CLR 60 323/54/24/2005/048/ FEW CU DSNT ESE-S-W
FEW CI DSNT W-NW WND L/V/ 57012 10054 20041

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SUMMARY FOR THURSDAY, APRIL 25, 2024

TEMPERATURE (DEGREES F)
MAX…….55   NORMAL…..61
MIN…….29   NORMAL…..42
MEAN……42   NORMAL…..51

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………….-9
TOTAL DEPARTURE FOR THE MONTH……………………+17 [+0.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY……………23  DEPARTURE……..+9
TOTAL HEATING UNITS FOR THE MONTH…………..466  DEPARTURE……..-9
TOTAL HEATING UNITS FOR THE SEASON…………5107  DEPARTURE……-715
TOTAL HEATING UNITS LAST SEASON TO DATE…….4900  DEPARTURE……+207

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)……….E28 SE   @  05:40 P.M.
VECTOR #1 (1-Sec)……….28 SE   @  05:40 P.M.
VECTOR #2 (1-Sec)……….27 SE   @  05:46 P.M.
DAVIS #1……………….27 S    @  06:43 P.M.
DAVIS #2 ………………34 S    @  07:19 P.M.
RMY #1 (Instantaneous)…..26 SSE  @  06:43 P.M.
RMY #2 (Instantaneous)…..29 SE   @  05:46 P.M.
MERLIN…………………24 SE
RICHARDS (C5C) (Inst)……24      @  06:43 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………18 S    @  07:20 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..18      @  07:20 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..19      @  06:23 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………17 S    @  07:20 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………22 S    @  07:19 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..18 S    @  07:20 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..20 S    @  06:23 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………18      @  07:20 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….9.0 N [217 total miles] VECTOR #1……………..9.4
VECTOR #2……………..9.6
DAVIS #1………………9.2 NW
DAVIS #2………………9.3 NNW
RMY #1………………..9.1 NW
RMY #2………………..9.5 NW
RICHARDS (C5C)…………9.6

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.14
TOTAL PRECIPITATION FOR THE MONTH…………..4.30 DEPARTURE…..+0.27
TOTAL PRECIPITATION FOR THE YEAR (2024)…….24.35 DEPARTURE…..+6.30

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE…….0.0
TOTAL SNOWFALL FOR THE MONTH………………..0.7 DEPARTURE……-2.0
TOTAL SNOWFALL FOR THE SEASON (2023-2024)……26.8 DEPARTURE…..-42.8

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PRELIMINARY CLIMATE SUMMARY FOR APRIL 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)

4/1   56/40/48/+7/0.00/0.0/153/20         20 SSE VEC1 20 SSE RMY 19
4/2   47/35/41/0/0.07/0.0/115/15          25 E   VEC1 25 E   RMY 25
4/3   41/34/38/-4/1.10/T/000/00           53 E   VEC1 53 E   RMY 53
4/4   36/32/34/-8/1.25/0.7/000/00         63 ENE VEC1 64 ENE RMY 68
4/5   45/31/38/-5/0.01/T/147/19           33 WNW VEC1 31 WNW RMY 33
4/6   43/33/38/-5/0.08/093/12             35 N   VEC1 35 N   RMY 35
4/7   48/34/41/-3/T/0.0/094/12            32 N   VEC1 31 N   RMY 31
4/8   66/36/51/+7/0.00/0.0/636/81         23 WNW VEC1 23 WNW RMY 22
4/9   63/40/52/+8/0.00/0.0/741/94         22 ENE VEC1 21 ENE RMY 21
4/10  65/38/52/+7/T/0.0/348/44            26 S   VEC1 26 S   RMY 30
4/11  55/42/49/+4/0.04/0.0/000/00         32 SSE VEC1 32 SSE RMY 31
4/12  60/46/53/+7/1.03/0.0/032/04         62 SSE VEC1 62 S   RMY 63
4/13  54/43/49/+3/T/0.0/271/34            43 W   VEC1 42 WNW RMY 46
4/14  58/42/50/+3/0.09/0.0/384/48         33 WSW VEC1 33 WSW RMY 35
4/15  73/43/58/+11/T/0.0/764/95           33 NW  VEC1 33 NW  RMY 34
4/16  68/44/56/+9/0.00/0.0/759/94         29 NW  VEC1 28 NW  RMY 29
4/17  60/40/50/+2/0.00/0.0/656/81         25 ESE VEC1 24 ESE RMY 24
4/18  47/40/44/-4/0.21/0.0/000/00         25 E   VEC1 25 E   RMY 23
4/19  60/41/51/+2/T/0.0/399/49            29 S   VEC1 29 S   RMY 29
4/20  57/40/49/0/0.38/0.0/082/10          34 WNW VEC1 37 WNW RMY 39
4/21  50/34/42/-8/0.00/0.0/295/36         30 NW  VEC1 30 WNW RMY 31
4/22  57/34/46/-4/0.00/0.0/822/100        29 NW  VEC1 29 NW  RMY 29
4/23  63/37/50/0/0.00/0.0/710/86          30 S   VEC1 29 S   RMY 29
4/24  63/33/48/-3/0.04/0.0/265/32         52 WNW VEC1 51 WNW RMY 58
4/25  55/29/42/-9/0.00/0.0/831/100        28 SE  VEC1 28 SE  RMY 26

4/26 The low since midnight is 32F, the daily normal low is 42F.

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APRIL 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 APRIL 26
HIGH 88 IN 2009
LOW 23 IN 1919
PRECIP 1.64 IN. IN 1931
SNOWFALL 1.0 IN. IN 2000
PEAK GUST 53 MPH SSW IN 1996

RECORDS FOR APRIL 27
HIGH 93 IN 1990
LOW 28 IN 1919
PRECIP 1.89 IN 1979
SNOWFALL 2.7 IN. IN 1993
PEAK GUST 65e MPH N IN 1941

TODAY’S REPORT PREPARED BY: Amanda Joly