Monday, April 22, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
MONDAY, APRIL 22, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0452E
SUNSET: 1834E
ABUNDANT SUNSHINE AND COOLER THAN NORMAL TEMPERATURES TODAY….
Quite a sparkling day here on Blue Hill with plenty of bright
sunshine being observed. Only a few clouds have been seen today
off in the distance.
It is a bit chilly with readings running below normal for the
date. Temperatures have reached the mid 50s early this afternoon,
after starting the morning in the mid 30s. The dew point has
settled back into the teens, after starting the day in the upper
20s. This level of dry air does make the air feel quite a bit
cooler than it is.
The wind has been a bit brisk as well, mainly out of a north-
west to north-northwesterly direction. The average speed for
the day so far has been around 11mph. Gusts have been reaching
mainly between 20-25mph at times, further adding to the chilly
feel. The peak gust so far today is 29mph, which occurred after
8am this morning.
Visibility has been excellent today despite the high pollen
count (which is visible as a hazy layer in the air). The view
has been generally between 70-80 miles all day.
The maximum temperature so far today is 55F degrees, which is
4 degrees below the normal high of 59F. The minimum temperature
since midnight is 34F degrees, which is 7 degrees below the
normal low of 41F.
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Today’s Observations:
7 A.M.
Weather: Clear, few stratocumulus distant W-WNW, few cirrus distant
E-SSW
Temperature: 40F; Dew Point: 28F; Relative Humidity: 61%
Wind: NW @ 9 kts
Sea-level pressure: 1015.9 mb; 30.00 in. Hg: rising, then more slowly
Visibility: 70 miles
6-hr Max temp: 40F
6-hr Min temp: 34F
24-hr Precip: 0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 CLR 70 159/40/28/3209/000/ FEW SC DSNT W-WNW FEW CI DSNT
E-SSW/ 8/501 51021 10040 20034
10 A.M.
Weather: Clear, few stratocumulus distant SW-WSW, few cirrus distant
ESE-SW
Temperature: 47F; Dew Point: 16F; Relative Humidity: 28%
Wind: NNW @ 12G18 kts
Sea-level pressure: 1017.0 mb; 30.03 in. Hg: rising, then steady
Visibility: 80 miles
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 CLR 80 170/47/16/3312G18/003/ FEW SC DSNT SW-WSW FEW CI DSNT
ESE-SW/ 8/501 51011
1 P.M.
Weather: Clear, few cirrus distant E-SSW
Temperature: 53F; Dew Point: 18F; Relative Humidity: 25%
Wind: NW @ 10G17 kts
Sea-level pressure: 1017.3 mb; 30.04 in. Hg: rising, then steady
Visibility: 70 miles
6-hr Max temp: 55F
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 70 173/53/18/3110G17/004/ FEW CI DSNT E-SSW/ 8/001
51003 10055 20040
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SUMMARY FOR SUNDAY, APRIL 21, 2024
TEMPERATURE (DEGREES F)
MAX…….50 NORMAL…..59
MIN…….34 NORMAL…..40
MEAN……42 NORMAL…..50
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………….-8
TOTAL DEPARTURE FOR THE MONTH……………………+33 [+1.4 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY……………23 DEPARTURE……..+7
TOTAL HEATING UNITS FOR THE MONTH…………..392 DEPARTURE…….-25
TOTAL HEATING UNITS FOR THE SEASON…………5033 DEPARTURE……-730
TOTAL HEATING UNITS LAST SEASON TO DATE…….4839 DEPARTURE……+194
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)……….E30 NW @ 04:15 P.M.
VECTOR #1 (1-Sec)……….30 WNW @ 04:08 P.M.
VECTOR #2 (1-Sec)……….34 WNW @ 04:08 P.M.
DAVIS #1……………….29 W @ 03:18 P.M.
DAVIS #2 ………………31 WNW @ 04:08 P.M.
RMY #1 (Instantaneous)…..31 NW @ 04:16 P.M.
RMY #2 (Instantaneous)…..35 WNW @ 04:08 P.M.
MERLIN…………………29 W
RICHARDS (C5C) (Inst)……30 @ 03:18 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………20 WNW @ 03:10 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..21 @ 03:38 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..24 @ 03:38 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………23 W @ 03:38 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………24 WNW @ 03:38 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..20 W @ 03:19 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..24 WNW @ 03:38 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………21 @ 03:38 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……10.6 WNW [254 total miles]
VECTOR #1…………….10.5
VECTOR #2…………….11.7
DAVIS #1……………..10.9 WNW
DAVIS #2……………..11.5 WNW
RMY #1……………….10.1 WNW
RMY #2……………….11.4 WNW
RICHARDS (C5C)………..10.9
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.14
TOTAL PRECIPITATION FOR THE MONTH…………..4.26 DEPARTURE…..+0.81
TOTAL PRECIPITATION FOR THE YEAR (2024)…….24.31 DEPARTURE…..+6.84
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……-1.9
TOTAL SNOWFALL FOR THE SEASON (2023-2024)……26.8 DEPARTURE…..-42.7
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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 The low since midnight is 34F, 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 22
HIGH 85 IN 1977, 2001
LOW 26 IN 1981
PRECIP 2.60 IN. IN 2019
SNOWFALL 3.0 IN. IN 1940
PEAK GUST 68e MPH NW IN 1945
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
TODAY’S REPORT PREPARED BY: Matt Douglas
