Sunday, February 5, 2023

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

SUNDAY, FEBRUARY 5, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0654E
SUNSET:  1703E

QUITE THE RAPID TURNAROUND TODAY, FROM THE ARCTIC BLAST YESTERDAY…

Weather is pretty amazing! After a brutal blast from the
arctic yesterday, today we have gone the other way with
rapidly warming temperatures. As a matter of fact, the
high so far today is 62 degrees warmer than the low early
yesterday morning!

Clouds have been the theme today with varying amounts of
thickness. This morning the mid and high level clouds
were thin and broken enough to allow for a decent period
of sunshine. However, as we move through the afternoon,
clouds have thickened to the point where the sun is only
dimly visible.

Regardless, temperatures have warmed nicely into the upper
40s this afternoon. Compared to yesterday, this is much more
enjoyable, but the gusty wind is definitely adding a chill
to the air. The average wind speed for the day is around
18mph with frequent gusts over 30mph out of the southwest.

The high so far today is 48F degrees, which is 13 degrees
above the normal maximum of 35F. The low since midnight is
14F degrees, which is 4 degrees below the normal minimum
of 18F.

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PRELIMINARY STATS FOR JANUARY 2023

TEMPERATURE, Deg. F
Avg. Max. 41.6 [ +6.9] Avg. Min. 29.1 [+10.8] Mean      35.4 [ +8.9] 24-hour corrected mean: 35.0
Max. for month: 55F on the 13th
Min. for month: 18F on the 11th

HEATING DEGREE DAYS
Total heating units:    913 [-280] Total for the season:  2823 [-580] Total for last season: 3141

COOLING DEGREE DAYS
Total cooling units:      0 [ 000] Total for the season:     0 [ 000] Total for last season:  889

PRECIPITATION, Inches
Total: 6.79 [+2.29] Greatest in 24 hrs: 1.32 on the 22-23rd

SNOWFALL, Inches
Total: 12.2 [-6.4] Greatest in 24 hrs: 4.1 on the 23rd

WIND, mph
Avg. uncorrected wind speed: 10.9 mph
Avg. corrected wind speed:   11.4 mph
Prevailing wind direction:   North [17%] Peak gust and direction:  54 SSE on the 13th

SUNSHINE:
Campbell-Stokes card minutes: 4392 of a possible 17130, or 26%
Astronomical total minutes: 4528 of a possible 17657, or 26%

————————————————————–

Today’s Observations:

7 A.M.
Weather: Scattered altocumulus, overcast cirrostratus, few breaks
in overcast SE-SW
Temperature: 24F; Dew Point: 16F; Relative Humidity: 71%
Wind: SW @ 16 kts
Sea-level pressure: 1024.5 mb; 30.25 in. Hg: falling, then more slowly
Visibility: 30 miles, hazy
6-hr Max temp: 24F
6-hr Min temp: 15F
24-hr Precip:  0.00 ins.
24-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1155 140 SCT E220 OVC 30 245/24/16/2216/025/ FEW BINOVC SE-SW
HAZY/ 8/056 56021 10024 20015

10 A.M.
Weather: Broken cirrus
Temperature: 36F; Dew Point: 24F; Relative Humidity: 69%
Wind: SW @ 17G26 kts, peak wind SW 35mph at 9:35 A.M.
Sea-level pressure: 1022.5 mb; 30.19 in. Hg: falling, then more rapidly
Visibility: 50 miles
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 E250 BKN 50 225/36/24/2317G26/019/ PK WND 2330/35/
8/004 58020

1 P.M.
Weather: Scattered altocumulus, broken cirrus
Temperature: 47F; Dew Point: 22F; Relative Humidity: 36%
Wind: SW @ 21G33 kts, peak wind SW 38mph at 12:55 P.M.
Sea-level pressure: 1018.1 mb; 30.06 in. Hg: falling, then more rapidly
Visibility: 60 miles
6-hr Max temp: 48F
6-hr Min temp: 24F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 130 SCT E250 BKN 60 181/47/22/2321G33/006/
PK WND 2333/55/ 8/054 58044 10048 20024

————————————————————–

SUMMARY FOR SATURDAY, FEBRUARY 4, 2023

TEMPERATURE (DEGREES F)
MAX…….14   NORMAL…..35
MIN……-14R  NORMAL…..18
MEAN…….0   NORMAL…..26

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……..-26
TOTAL DEPARTURE FOR THE MONTH………………..-42 [-10.7 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY……………65  DEPARTURE…….+26
TOTAL HEATING UNITS FOR THE MONTH…………..198  DEPARTURE…….+43
TOTAL HEATING UNITS FOR THE SEASON…………3021  DEPARTURE……-537
TOTAL HEATING UNITS LAST SEASON TO DATE…….3263  DEPARTURE……-242

PEAK WIND GUST (MPH):
420C (Official)…………45 NW  @ 12:36 A.M.
VECTOR #2 (1-Sec)……….54     @ 12:35 A.M.
DAVIS #1……………….46 WNW @ 12:36 A.M.
DAVIS #2 ………………44 NW  @  1:32 A.M.
RMY #2 (Instantaneous)…..51 NW  @ 12:35 A.M.
MERLIN…………………M
VECTOR #1……OUT OF SERVICE D/T RENOVATIONS
RMY #1………OUT OF SERVICE D/T RENOVATIONS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………35 NW  @ 12:37 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..33     @ 12:02 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………35 WNW @ 12:35 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………33 NW  @ 12:02 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..33 NW  @ 12:02 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE RMY #1 AVERAGE……OUT OF SERVICE D/T RENOVATIONS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……14.8 WNW [354 total miles] VECTOR #2…………….15.4
DAVIS #1……………..14.4 WNW
DAVIS #2……………..15.3 WNW
RMY #2……………….15.2 WNW
RMY #1……….OUT OF SERVICE D/T RENOVATIONS
VECTOR #1…….OUT OF SERVICE D/T RENOVATIONS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.14
TOTAL PRECIPITATION FOR THE MONTH………….TRACE DEPARTURE…..-0.55
TOTAL PRECIPITATION FOR THE YEAR……………6.79 DEPARTURE…..+1.74

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.7
TOTAL SNOWFALL FOR THE MONTH………………TRACE DEPARTURE……-2.7
TOTAL SNOWFALL FOR THE SEASON (2022-2023)……14.9 DEPARTURE…..-21.5

————————————————————–

PRELIMINARY CLIMATE SUMMARY FOR JANUARY CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN)/SUN(%)/PEAK GUST/VEC1/RMY GUST
VEC1: Vector #1 1-second gust
RMY:  R.M. Young wind gust recording system (Instantaneous)
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M:    Missing data

1/1   53/38/46/+17/0.04/0.0/412/75        39 WNW  VEC1 N/A    RMY 60
1/2   49/33/41/+13/0.00/0.0/044/08        39 WNW  VEC1 N/A    RMY 39
1/3   48/37/43/+15/0.50/0.0/000/00        23 S    VEC1 N/A    RMY 24
1/4   43/37/40/+12/0.31/0.0/000/00        23 NE   VEC1 N/A    RMY 23
1/5   43/33/38/+10/0.23/0.0/000/00        34 ENE  VEC1 N/A    RMY 37
1/6   35/31/33/+5/0.18/1.0/000/00         19 NNE  VEC1 N/A    RMY 19
1/7   40/30/35/+8/0.00/0.0/105/19         22 NW   VEC1 N/A    RMY 23
1/8   36/20/28/+1/0.00/0.0/517/93         26 NNW  VEC1 N/A    RMY 28
1/9   42/26/34/+7/T/0.1/267/48            27 NW   VEC1 N/A    RMY 27
1/10  41/25/33/+6/0.00/0.0/318/57         28 NW   VEC1 N/A    RMY 28
1/11  33/18/26/-1/T/0.1/358/64            19 N    VEC1 N/A    RMY 18
1/12  48/28/38/+11/0.29/0.1/000/00        45 S    VEC1 N/A    RMY 46
1/13  55/36/46/+20/0.62/0.0/000/00        54 SSW  VEC1 N/A    RMY 56
1/14  36/29/33/+7/0.11/T/000/00           30 NNE  VEC1 N/A    RMY M
1/15  33/26/30/+4/0.10/1.2/000/00         45 NNE  VEC1 N/A    RMY 45
1/16  30/26/28/+2/0.22/2.7/000/00         36 NNE  VEC1 N/A    RMY 37
1/17  47/25/36/+10/0.02/0.0/415/73        22 WSW  VEC1 N/A    RMY 23
1/18  49/35/42/+16/0.01/0.0/314/55        37 NW   VEC1 N/A    RMY 38
1/19  38/32/35/+9/0.75/T/000/00           31 NNE  VEC1 N/A    RMY 32
1/20  35/29/32/+6/0.56/1.6/000/00         52 NE   VEC1 N/A    RMY 54
1/21  31/25/28/+2/0.01/0.2/000/00         21 NW   VEC1 N/A    RMY 21
1/22  35/25/30/+4/0.25/0.2/000/00         21 N    VEC1 N/A    RMY 20
1/23  34/27/31/+5/1.18/4.1/000/00         36 NNW  VEC1 N/A    RMY 37
1/24  35/25/20/+4/0.00/0.0/157/27         32 WNW  VEC1 N/A    RMY 32
1/25  42/27/35/+9/0.45/0.1/012/02         40 SSE  VEC1 N/A    RMY 42
1/26  53/33/43/+17/0.85/T/029/05          52 S    VEC1 N/A    RMY 54
1/27  41/25/33/+7/0.00/0.0/577/98         31 WNW  VEC1 N/A    RMY 29
1/28  48/29/39/+13/0.00/0.0/390/66        38 W    VEC1 N/A    RMY 40
1/29  49/36/43/+17/T/0.0/101/17           33 S    VEC1 N/A    RMY 38
1/30  50/36/43/+17/0.00/0.0/327/55        18 SW   VEC1 N/A    RMY 20
1/31  39/21/30/+4/0.11/0.8/185/31         28 NW   VEC1 N/A    RMY 29

PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN)/SUN(%)/PEAK GUST/VEC1/RMY GUST
VEC1: Vector #1 1-second gust
RMY:  R.M. Young wind gust recording system (Instantaneous)
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M:    Missing data

2/1   30/18/24/-2/T/T/…/..              17 NW   VEC1 N/A    RMY 20
2/2   38/19/29/+3/0.00/0.0/…/..         25 SW   VEC1 N/A    RMY 29
2/3   28/-11/9/-17/T/T/…/..             56 WNW  VEC1 N/A    RMY 64
2/4   14/-14/0/-26/0.00/0.0/…/..        45 NW   VEC1 N/A    RMY 51

2/5 The low since midnight is 14F, the daily normal low is 18F

DAILY RECORDS

02/03/2023: NEW RECORD MINIMUM TEMPERATURE OF -11F,
THIS BEATS THE OLD RECORD OF -7F SET IN 1955

02/04/2023: NEW RECORD MINIMUM TEMPERATURE OF -14F,
THIS BEATS THE OLD RECORD OF -4F SET IN 1886 AND 1908

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)

RECORDS FOR FEBRUARY 5
HIGH 65F IN 1991
LOW -14F IN 1918
PRECIP 1.62 INS. IN 2016
SNOWFALL 16.0 INS. IN 1907
PEAK GUST 67 MPH WNW IN 1969

RECORDS FOR FEBRUARY 6
HIGH 54F IN 1909
LOW -10F IN 1895
PRECIP 1.88 INS. IN 1896
SNOWFALL 13.0 INS. IN 1978 [BLIZZARD OF 1978] PEAK GUST 84e MPH NE IN 1978

TODAY’S REPORT PREPARED BY: Matt Douglas