Saturday, March 7, 2020

| March 8, 2020 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, MARCH 7, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

STRONG OCEAN STORM BRUSHES THE REGION WITH SOME SNOW
OVERNIGHT; CLEARING SKIES, GUSTY WINDS, AND EXCELLENT
VISIBILITY LEFT IN IT’S WAKE TODAY…

We had a taste of winter last night with a period of
snow and gusty northeast winds. 0.8″ of snow was measured
here on the summit, which melted down to 0.07″ of liquid.
The temperature dropped rapidly once precipitation started
last night, so much in fact it allowed the snow to dry out
some, thus a snow to water ratio slightly over 10:1.

Winds frequently gusted 35-45mph last night into early
this morning with a peak gust of 46 mph occurring at 9:37pm
out of the northeast.

Today skies cleared out in the wake of the ocean storm
with a gusty north to northwest wind continuing. The
dew point plummeted this morning down into the low
single digits. This has helped with clearing the air
significantly, as such visibility has been a perfect
90 miles all day!

The high so far today is 41F, this is 1 degree below
the normal high of 42F. The low since midnight is 26F,
2 degrees above the normal low of 24F.

PRELIMINARY STATS FOR FEBRUARY 2020

TEMPERATURE, Deg. F
Avg. Max. 40.7 [+3.9]
Avg. Min. 25.9 [+6.7]
Mean      33.3 [+5.4]
24-hour corrected mean: 33.3
Max. for month: 60F on the 24th
Min. for month: 4F on the 15th

HEATING DEGREE DAYS
Total heating units:    911 [-164]
Total for the season:  4140 [-345]
Total for last season: 4485

PRECIPITATION, Inches
Total: 3.20 [-0.87]
Greatest in 24 hrs: N/A

SNOWFALL, Inches
Total: 0.6 [-13.3]
Greatest in 24 hrs: 0.5 ins. on the 13th

WIND, mph
Avg. uncorrected wind speed: 11.5 mph
Avg. corrected wind speed:   12.0 mph
Prevailing wind direction:   W [24%]
Peak gust and direction:     71 WSW on the 7th

SUNSHINE:
Campbell-Stokes card minutes: 7596 minutes of possible 17796 or 43%
Astronomical total minutes: 7853 minutes of possible 18422 or 43%

Today’s Observations:

7 A.M.
Weather: Scattered Altostratus, overcast altostratus, few
stratocumulus NE-SE-SW
Temperature: 27F; Dew Point: 0F; Relative Humidity: 31%
Wind: N at 16G26 kts, peak wind N at 35kts at 6:12 A.M.
Sea-level pressure: 29.98 ins. Hg: rising, then more rapidly
Visibility: 90 miles
6-hr Max temp: 29F
6-hr Min temp: 26F
24-hr Precip:  0.07 ins.
24-hr Snowfall: 0.8 ins.
BHO SA 1155 110 SCT E150 OVC 90 152/27/0/3516G26/998/ BINOVC
DSNT W-N FEW SC NE-SE-SW HIER CLDS VSBL DSNT W-NW PK WND 3535/12/
TOTAL NEW SNW PST 24HRS 0.8 INS/ 8/52/ 4/001 53033 6/// 70007
10029 20026

10 A.M.
Weather: Scattered altostratus, thin broken cirrus, few stratocumulus
distant E-SE
Temperature: 33F; Dew Point: 0F; Relative Humidity: 24%
Wind: N at 18G29 kts, peak wind N at 35kts at 9:02 A.M.
Sea-level pressure: 30.06 ins. Hg: rising, then more rapidly
Visibility: 90 miles
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 150 SCT E250 –BKN 90 179/33/0/3518G29/006/ FEW SC DSNT
E-SE PK WND 3635/02/ 8/521 53027

1 P.M.
Weather: Thin broken cirrus
Temperature: 40F; Dew Point: 1F; Relative Humidity: 19%
Wind: NW at 15G27 kts, peak wind N at 28kts at 12:08 P.M.
Sea-level pressure: 30.09 ins. Hg: rising, then more slowly
Visibility: 90 miles
6-hr Max temp: 41F
6-hr Min temp: 26F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
BHO SA 1755 E250 –BKN 90 191/40/1/3315G27/009/ PK WND 3528/08/ 8/001
4/000 51012 10041 20026

SUMMARY FOR FRIDAY, MARCH 6, 2020

TEMPERATURE (DEGREES F)
MAX…..47   NORMAL…..41
MIN…..30   NORMAL…..23
MEAN….39   NORMAL…..32

DEPARTURE FROM 30-YEAR NORMAL………………..+7
TOTAL DEPARTURE FOR THE MONTH……………….+52 [+8.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………26  DEPARTURE……..-7
TOTAL HEATING UNITS FOR THE MONTH…………..148  DEPARTURE…….-51
TOTAL HEATING UNITS FOR THE SEASON…………4288  DEPARTURE……-479
TOTAL HEATING UNITS LAST SEASON TO DATE…….4721  DEPARTURE……-433

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..46 NE  AT   9:37 P.M.
AERO…………………….45 NE  AT   8:35 P.M.
ASOS…………………….45 NE  AT   8:34 P.M.
DAVIS……………………43 NE  AT   9:42 P.M. RMY 46
FASTEST MILE FOR YESTERDAY………………….33 ENE AT   8:24 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….29 ENE AT   8:26 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………30 ENE AT   8:26 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..12.8 E
ASOS…………………..13.1
DAVIS………………….13.0 E [082 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.07  DEPARTURE……-0.10
ASOS…………..0.08
TOTAL PRECIPITATION FOR THE MONTH……….0.16  DEPARTURE……-0.88
ASOS…………..0.19
TOTAL PRECIPITATION FOR THE YEAR………..4.82  DEPARTURE……-4.64
ASOS…………..5.10

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.8  DEPARTURE…….+0.3
TOTAL SNOWFALL FOR THE MONTH…………….0.8  DEPARTURE…….-2.3
TOTAL SNOWFALL FOR THE SEASON…………..25.6  DEPARTURE……-24.5

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

02/01  38/30/34/+8/0.01/T/000/00          14 WSW AERO 14 WSW RMY N/A
02/02  40/30/35/+9/0.00/0.0/078/13        18 W   AERO 18 WNW RMY 18
02/03  44/27/36/+10/0.00/0.0/260/43       28 W   AERO 28 W   RMY 28
02/04  44/33/39/+13/0.00/0.0/055/09       19 E   AERO 16 E   RMY 18
02/05  41/30/36/+10/0.00/0.0/000/00       20 NNW AERO 19 NNW RMY N/A
02/06  31/30/34/+8/0.00/0.0/000/00        29 E   AERO 28 E   RMY 27
02/07  53/25/39/+12/…./0.1/000/00     71 WSW AERO 71 SSW RMY 73
02/08  33/20/27/0/T/T/616/100            46 W   AERO 44 W   RMY 44
02/09  33/15/24/-3/T/T/303/49             30 SSE AERO 29 SSE RMY N/A
02/10  42/33/38/+11/…./0.0/000/00       39 SSW AERO 39 SSW RMY 39
02/11  40/36/38/+11/…./0.0/000/00     24 W   AERO 23 W   RMY N/A
02/12  41/30/36/+9/0.00/0.0/314/50        37 W   AERO 36 W   RMY N/A
02/13  35/31/34/+6/…./0.5/000/00     29 SSW AERO 29 SSW RMY N/A
02/14  33/8/21/-7/0.00/0.0/506/80         32 WNW AERO 32 NW  RMY 34
02/15  27/4/16/-12/0.00/0.0/508/80        31 SSW AERO 31 SSW RMY N/A
02/16  40/23/32/+4/0.00/0.0/006/01        38 SW  AERO 38 SW  RMY N/A
02/17  44/28/36/+8/0.00/0.0/582/91        25 WNW AERO 24 WNW RMY 24
02/18  37/27/32/+3/0.31/T/000/00          26 SE  AERO 26 SE  RMY N/A
02/19  42/25/34/+5/0.00/0.0/530/82        45 W   AERO 46 W   RMY 44
02/20  31/18/25/-4/0.00/0.0/389/60        32 W   AERO 32 W   RMY N/A
02/21  30/11/21/-8/0.00/0.0/651/100       24 NNW AERO 21 N   RMY N/A
02/22  44/23/34/+5/0.00/0.0/647/99        26 W   AERO 24 W   RMY 27
02/23  53/30/42/+12/0.00/0.0/636/97       21 SW  AERO 22 WSW RMY 23
02/24  60/32/46/+16/0.00/0.0/606/92       29 S   AERO 29 SSW RMY 31
02/25  53/40/47/+17/…./0.0/033/05     17 NE  AERO 18 ENE RMY 17
02/26  45/39/42/+12/…./0.0/007/01    23 ENE AERO 24 E   RMY N/A
02/27  49/27/38/+7/0.00/0.0/274/41        51 W   AERO 53 W   RMY 52
02/28  36/25/31/0/0.00/0.0/596/89        38 SW  AERO 38 SW  RMY 36
02/29  35/19/27/-4/0.00/0.0/256/38        32 W   AERO 32 W   RMY 34

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

03/01  33/15/24/-7/0.00/0.0/…./..        28 WNW AERO 28 WNW RMY 27
03/02  52/24/38/+7/T/T/…./..             40 S   AERO 39 S   RMY 41
03/03  64/45/55/+23/…./…/…./..       30 S   AERO 30 S   RMY N/A
03/04  50/38/44/+12/…./…/…./..       56 W   AERO 56 W   RMY 58
03/05  51/32/42/+10/…./…/…./..       31 W   AERO 31 NW  RMY 32
03/06  47/30/39/+7/…./…/…./..        46 NE  AERO 45 NE  RMY 46

03/07 The low since midnight is 26F, daily normal minimum is 24F

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

RECORDS FOR MARCH 7
HIGH 66 IN 1946
LOW -1 IN 1890
PRECIP 2.05 INS. IN 1967
SNOWFALL 11.5 INS. IN 2013
PEAK GUST 66 MPH NE IN 1962

RECORDS FOR MARCH 8
HIGH 66 IN 2012
LOW 2 IN 1986
PRECIP 2.20 INS. IN 2008
SNOWFALL 18.0 INS. IN 2013
PEAK GUST 69 MPH SSW IN 2008

TODAY’S REPORT PREPARED BY: Matt Douglas

Category: Daily Discussions

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