Tuesday, April 23, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
TUESDAY, APRIL 23, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0450E
SUNSET: 1835E
ANOTHER VERY NICE DAY FOLLOWING EARLY MORNING FOG….
We have another very nice day in progress after early morning
dense fog burned off. Some high thin cirrus clouds are visible
to the distance east through south, part of a large intensifying
ocean storm well offshore. Some cirrus can also be seen to the
distant west as well, part of the next frontal system that will
impact the area tomorrow. Otherwise, sunshine has been the theme
today.
We had another chilly start to the day as well with readings
in the mid 30s early this morning. Temperatures have warmed
nicely into the low 60s early this afternoon however, making
for a fine spring day (especially for New England standards).
The dew point isn’t as low as yesterday, but its still on the
dry side with values falling into the low 30s.
The wind was fairly steady, but on the light side this morning,
mainly out of a south or south-southwest direction. However
as the diurnal heating maximizes early this afternoon, mixing
from aloft has caused the wind to increase in speed. The average
speed for the day to this point is around 9mph, but is trending
upwards in the last couple of hours. Gusts have been reaching
mainly between 20-25mph in the last couple of hours as well.
The peak gust so far today is 26mph, which occurred just after
11:30am.
Visibility has improved markedly from early this morning. The
view was at 1/4 mile or less, but reached up to 60 miles by mid
morning and continues at that value early this afternoon.
The maximum temperature so far today is 63F degrees, which is
3 degrees above the normal high of 60F. The minimum temperature
since midnight is 37F degrees, which is 4 degrees below the
normal low of 41F.
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Today’s Observations:
7 A.M.
Weather: Overcast stratus, few breaks in overcast all quadrants,
stratus fractus drifting over summit, sun dimly visible
Temperature: 40F; Dew Point: 40F; Relative Humidity: 100%
Wind: S @ 7 kts
Sea-level pressure: 1023.7 mb; 30.23 in. Hg: rising, then more rapidly
Visibility: 1/4 mile, fog
6-hr Max temp: 40F
6-hr Min temp: 37F
24-hr Precip: 0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 E1 OVC 1/4F 237/40/40/1707/023/ FEW BINOVC ALQDS STFRA
DRFTG OVR SMT SUN DMLY VSBL/ 8/6// 53018 10040 20037
10 A.M.
Weather: Clear, few cumulus distant S-SSW, few cirrus distant
ENE-S and distant W-NW
Temperature: 56F; Dew Point: 33F; Relative Humidity: 42%
Wind: SSW @ 7 kts
Sea-level pressure: 1022.7 mb; 30.20 in. Hg: falling, then more rapidly
Visibility: 60 miles
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 CLR 60 227/56/33/2007/020/ FEW CU DSNT S-SSW FEW CI DSNT
ENE-S AND DSNT W-NW/ 8/201 58010
1 P.M.
Weather: Clear, few cirrus distant NE-S and distant WSW-WNW
Temperature: 60F; Dew Point: 30F; Relative Humidity: 30%
Wind: S @ 10G20 kts
Sea-level pressure: 1019.8 mb; 30.11 in. Hg: falling, then more slowly
Visibility: 60 miles
6-hr Max temp: 63F
6-hr Min temp: 40F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 CLR 60 198/60/30/1910G20/011/ FEW CI DSNT NE-S AND DSNT
WSW-WNW/ 8/001 56029 10063 20040
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SUMMARY FOR MONDAY, APRIL 22, 2024
TEMPERATURE (DEGREES F)
MAX…….57 NORMAL…..59
MIN…….34 NORMAL…..41
MEAN……46 NORMAL…..50
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………….-4
TOTAL DEPARTURE FOR THE MONTH……………………+29 [+1.1 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY……………19 DEPARTURE……..+4
TOTAL HEATING UNITS FOR THE MONTH…………..411 DEPARTURE…….-21
TOTAL HEATING UNITS FOR THE SEASON…………5052 DEPARTURE……-727
TOTAL HEATING UNITS LAST SEASON TO DATE…….4856 DEPARTURE……+196
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)……….E29 NW @ 08:14 A.M.
VECTOR #1 (1-Sec)……….29 NW @ 08:14 A.M.
VECTOR #2 (1-Sec)……….30 NW @ 08:19 A.M.
DAVIS #1……………….27 NW @ 08:14 A.M.
DAVIS #2 ………………26 NNW @ 08:18 A.M.
RMY #1 (Instantaneous)…..29 NW @ 08:14 A.M.
RMY #2 (Instantaneous)…..30 NW @ 08:19 A.M.
MERLIN…………………27 NW
RICHARDS (C5C) (Inst)……28 @ 08:14 A.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………23 NW @ 08:19 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..18 @ 10:01 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..20 @ 08:21 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………19 NW @ 08:19 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………19 NNW @ 08:21 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..18 NW @ 08:17 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..19 NNW @ 10:01 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………19 @ 08:17 A.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……10.3 NW [246 total miles]
VECTOR #1…………….10.3
VECTOR #2…………….10.8
DAVIS #1……………..10.4 WNW
DAVIS #2……………..10.4 NW
RMY #1………………..9.8 WNW
RMY #2……………….10.6 WNW
RICHARDS (C5C)………..10.6
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.15
TOTAL PRECIPITATION FOR THE MONTH…………..4.26 DEPARTURE…..+0.66
TOTAL PRECIPITATION FOR THE YEAR (2024)…….24.31 DEPARTURE…..+6.69
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.1
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/…/.. 25 E VEC1 25 E RMY 23
4/19 60/41/51/+2/T/0.0/…/.. 29 S VEC1 29 S RMY 29
4/20 57/40/49/0/0.38/0.0/…/.. 34 WNW VEC1 37 WNW RMY 39
4/21 50/34/42/-8/0.00/0.0/…/.. 30 NW VEC1 30 WNW RMY 31
4/22 57/34/46/-4/0.00/0.0/…/.. 29 NW VEC1 29 NW RMY 29
4/23 The low since midnight is 37F, the daily normal low is 41F.
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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 23
HIGH 85 IN 1908, 2007
LOW 25 IN 1933,1989
PRECIP 1.99 IN. IN 2012
SNOWFALL 0.5 IN. IN 1911, 1956
PEAK GUST 64 MPH WNW IN 1962
RECORDS FOR APRIL 24
HIGH 82 IN 2001
LOW 22 IN 1930
PRECIP 2.51 INS IN 1898
SNOWFALL 1.2 INS IN 1967
PEAK GUST 59 MPH NW IN 1962
TODAY’S REPORT PREPARED BY: Matt Douglas
