Sunday, February 26, 2023

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

SUNDAY, FEBRUARY 26, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0625E
SUNSET:  1730E

OVERCAST AND COLD WITH A BIT OF LIGHT SNOW…

Clouds have been the theme today following the period of light snow
late yesterday afternoon and evening. That period of snow deposited
0.5″ of light fluffy snow on the summit. Another period of light snow
occurred this morning bringing only a trace.

Other than the clouds and snow, it remains on the cold side with
temperatures rising from the teens into the lower 30s by mid
afternoon.

The wind started the day very much on the light side, even going calm
for a time. But the wind has since picked up a bit from the south-
southwest with gusts reaching around 20mph.

Visibility has been limited today thanks to thin fog and/or periods
of light snow. Values have generally been 15 miles or less.

The high so far today is 32F, which is 7 degrees below the normal
maximum of 39F. The low since midnight is 16F degrees, which is 6
degrees below the normal minimum of 22F.

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Today’s Observations:

7 A.M.
Weather: Overcast stratus
Temperature: 19F; Dew Point: 18F; Relative Humidity: 96%
Wind: SW @ 4 kts, wind light
Sea-level pressure: 1017.9 mb; 30.06 in. Hg: falling, then more slowly
Visibility: 5 miles, fog
6-hr Max temp: 19F
6-hr Min temp: 16F
24-hr Precip:  0.02 ins.
24-hr Snowfall: 0.5 ins.
Snow Depth: 3 ins.
BHO SA 1155 E3 OVC 5F 179/19/18/2204/006/ WND LGT NEW SNW PST
24 HRS 0.5 INS/ 8/6// 4/003 56016 70002 10019 20016

10 A.M.
Weather: Scattered stratocumulus, overcast altocumulus, light snow
Temperature: 24F; Dew Point: 22F; Relative Humidity: 89%
Wind: S @ 7 kts
Sea-level pressure: 1014.8mb; 29.97 in. Hg: falling, then more rapidly
Visibility: 10 miles, thin fog
3-hr Precip:  Trace
3-hr Snowfall: Trace
BHO SA 1455 10 SCT E60 OVC 10S- 148/24/22/1907/997/ S-B46
PCPN VRY LGT THN F ALQDS NEW SNW PST 3 HRS TRACE/ 8/57/ 58031 6000/

1 P.M.
Weather: Overcast stratocumulus, light snow
Temperature: 29F; Dew Point: 26F; Relative Humidity: 89%
Wind: SSW @ 8 kts
Sea-level pressure: 1009.6 mb; 29.81 in. Hg: falling, then more rapidly
Visibility: 10 miles, thin fog
6-hr Max temp: 29F
6-hr Min temp: 26F
6-hr Precip:  Trace
6-hr Snowfall: Trace
Snow Depth: 3 ins.
BHO SA 1755 E12 OVC 10S- 096/29/26/2108/981/ S-B05 PCPN VRY LGT
THN F ALQDS PRESFR NEW SNW PST 6 HRS TRACE/ 8/5// 4/003 58052
6000/ 10029 20029

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SUMMARY FOR SATURDAY, FEBRUARY 25, 2023

TEMPERATURE (DEGREES F)
MAX…….19   NORMAL…..39
MIN……. 9   NORMAL…..22
MEAN……14   NORMAL…..30

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……..-16
TOTAL DEPARTURE FOR THE MONTH……………….+141 [+5.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY……………51  DEPARTURE…….+16
TOTAL HEATING UNITS FOR THE MONTH…………..786  DEPARTURE……-140
TOTAL HEATING UNITS FOR THE SEASON…………3609  DEPARTURE……-721
TOTAL HEATING UNITS LAST SEASON TO DATE…….3958  DEPARTURE……-349

PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,
420C, Contacting, Merlin and Richards are all Main Tower.

420C (Official)…………17 NNW @  1:04 A.M.
VECTOR #1 (1-Sec)……….19 NNW @  1:36 A.M.
VECTOR #2 (1-Sec)……….22 NNW @  1:19 A.M.
DAVIS #1……………….18 NNW @ 12:31 A.M.
DAVIS #2 ………………19 N   @ 12:19 A.M.
RMY #1 (Instantaneous)…..19 NNW @ 12:32 A.M.
RMY #2 (Instantaneous)…..21 NNW @ 12:19 A.M.
MERLIN…………………M
RICHARDS (C5C) (Inst)……18     @ 12:32 A.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………12 NW    @ 12:29 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..13       @ 12:29 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..13       @ 12:20 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………13 NNW   @ 12:29 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………13 N     @ 12:20 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..13 NNW   @ 12:29 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..14 NNW   @ 12:20 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………13       @ 12:29 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…… 5.6 NNW [135 total miles] VECTOR #1……………. 6.2
VECTOR #2……………. 6.2
DAVIS #1…………….. 5.4 NW
DAVIS #2…………….. 6.0 NNW
RMY #1………………. 6.2 W
RMY #2………………. 6.3 WNW
RICHARDS (C5C)……….. 6.7

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.02 DEPARTURE…..-0.14
TOTAL PRECIPITATION FOR THE MONTH…………..1.46 DEPARTURE…..-2.07
TOTAL PRECIPITATION FOR THE YEAR……………8.25 DEPARTURE…..+0.22

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.5 DEPARTURE……-0.1
TOTAL SNOWFALL FOR THE MONTH………………..6.1 DEPARTURE…..-10.3
TOTAL SNOWFALL FOR THE SEASON (2022-2023)……21.0 DEPARTURE…..-29.1

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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/552/92              17 NW   VEC1 N/A    RMY 20
2/2   38/19/29/+3/0.00/0.0/518/86         25 SW   VEC1 N/A    RMY 29
2/3   28/-11/9/-17/T/T/557/92             56 WNW  VEC1 N/A    RMY 64
2/4   14/-14/0/-26/0.00/0.0/473/78        45 NW   VEC1 N/A    RMY 51
2/5   49/14/32/+5/0.00/0.0/359/59         38 SW   VEC1 N/A    RMY 43
2/6   47/30/39/+12/0.00/0.0/025/04        28 NE   VEC1 N/A    RMY 29
2/7   31/22/27/0/0.01/0.1/461/75          29 SSW  VEC1 N/A    RMY 33
2/8   46/31/39/+12/0.00/0.0/413/67        30 NW   VEC1 N/A    RMY 34
2/9   49/33/41/+14/T/0.0/149/24           31 SSE  VEC1 N/A    RMY 32
2/10  60/31/46/+19/0.00/0.0/603/97        43 W    VEC1 N/A    RMY 51
2/11  43/31/37/+10/0.00/0.0/625/100       41 WNW  VEC1 N/A    RMY 46
2/12  48/28/38/+10/0.00/0.0/339/54        22 SW   VEC1 N/A    RMY 24
2/13  42/33/38/+10/0.00/0.0/069/11        28 NE   VEC1 N/A    RMY 36
2/14  50/34/42/+14/0.00/0.0/475/75        30 NW   VEC1 33 NW  RMY 35
2/15  56/35/46/+18/0.00/0.0/279/44        39 SSW  VEC1 44 SSW RMY 49
2/16  61/50/56/+28/T/0.0/108/17           29 W    VEC1 31 W   RMY 34
2/17  56/23/40/+11/0.06/0.1/000/00        44 NNW  VEC1 46 NNW RMY 46
2/18  39/19/29/0/0.00/0.0/643/100         41 NW   VEC1 42 NNW RMY 47
2/19  44/30/37/+8/0.00/0.0/129/20         32 S    VEC1 35 S   RMY 36
2/20  59/41/50/+21/0.00/0.0/208/32        35 W    VEC1 36 W   RMY 40
2/21  41/31/36/+7/0.22/1.4/000/00         26 W    VEC1 27 W   RMY 27
2/22  42/30/36/+6/0.23/0.5/…/..         33 WNW  VEC1 35 WNW RMY 36
2/23  32/25/29/-1/0.91/3.5/…/..         29 NNW  VEC1 M  M   RMY 21
2/24  33/16/25/-5/0.01/T/…/..           39 NW   VEC1 M  M   RMY 47
2/25  19/9/14/-16/0.02/0.5/…/..         17 NNW  VEC1 19 NNW RMY 19

2/26  The low since midnight is 16, the daily normal low is 22F

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

02/10/2023: NEW RECORD MAXIMUM TEMPERATURE OF 60F,
THIS BEATS THE OLD RECORD OF 56F SET IN 1909

02/16/2023: NEW RECORD HIGH MINIMUM TEMPERATURE OF 50F,
THIS BEATS THE OLD RECORD OF 41F SET IN 1976. THIS ALSO
TIES THE WARMEST MINIMUM TEMPERATURE FOR FEBRUARY SET
IN 2018

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

RECORDS FOR FEBRUARY 26
HIGH 67F IN 1957
LOW -7F IN 1928
PRECIP 2.24 INCHES IN 1979
SNOWFALL 11.1 INCHES IN 1933
PEAK GUST 66 MPH W IN 1961

RECORDS FOR FEBRUARY 27
HIGH 61F IN 1976
LOW -8F IN 1900
PRECIP 1.43 INCHES IN 2013
SNOWFALL 6.0 INCHES IN 1922
PEAK GUST 67 MPH W IN 1985

TODAY’S REPORT PREPARED BY: Matt Douglas