Thursday, March 26, 2020

| March 26, 2020 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, MARCH 26, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

CLEAR CONDITIONS IN THE MORNING BEGIN TO
CLOUD UP IN THE AFTERNOON ON A CLOSE TO
NORMAL EARLY SPRING DAY….

Today we observed 25 miles of visibility in the morning,
increasing to 70 miles by 1 P.M. Skies went from almost
overcast, to clear, and back to mostly cloudy by 4 P.M.
This is all in conjunction with a pressure drop that became
more significant over the course of the day. Wind became
lighter since this morning, and shifted from NW to NE.

The overnight low was 30F, this is the same as the normal
low of 30F. The high so far today is 49F, a degree above the
normal max of 48F.

Today’s Observations:

7 A.M.
Weather: Broken altostratus
Temperature: 32F; Dew Point: 30F; Relative Humidity: 92%
Wind: N at 9G14 kts
Sea-level pressure: 30.03 ins. Hg: rising, then more slowly
Visibility: 25 miles, distant fog
6-hr Max temp: 34F
6-hr Min temp: 30F
24-hr Precip:  0.03 ins.
24-hr Snowfall: 0.0 ins.
BHO SA 1155 E100 BKN 25 170/32/30/3509G14/003/ DSNT FG ALQDS/
8/02/ 70003 53008 10034 20030

10 A.M.
Weather: Few cirrostratus
Temperature: 44F; Dew Point: 27F; Relative Humidity: 51%
Wind: NW at 10G16 kts
Sea-level pressure: 30.02 ins. Hg: falling steadily
Visibility: 65 miles
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 CLR 65 167/44/27/3310G16/002/ FEW CS ALQDS/ 8/005
58003

1 P.M.
Weather: Few cirrus
Temperature: 49F; Dew Point: 25F; Relative Humidity: 39%
Wind: ENE at 7 kts
Sea-level pressure: 29.96 ins. Hg: falling, then more rapidly
Visibility: 70 miles
6-hr Max temp: 49F
6-hr Min temp: 32F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
BHO SA 1755 CLR 70 145/49/25/0207/996/ FEW CI ALQDS/ 8/002
58022 10049 20032

SUMMARY FOR WEDNESDAY, MARCH 25, 2020

TEMPERATURE (DEGREES F)
MAX…..41   NORMAL…..47
MIN…..35   NORMAL…..30
MEAN….38   NORMAL…..38

DEPARTURE FROM 30-YEAR NORMAL………………. 0
TOTAL DEPARTURE FOR THE MONTH………………+170 [+6.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………27  DEPARTURE…….  0
TOTAL HEATING UNITS FOR THE MONTH…………..593  DEPARTURE……-170
TOTAL HEATING UNITS FOR THE SEASON…………4733  DEPARTURE……-598
TOTAL HEATING UNITS LAST SEASON TO DATE…….5272  DEPARTURE……-540

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..28 ENE AT  9:53 P.M.
AERO…………………….28 ENE AT 10:10 P.M.
ASOS…………………….28 ENE AT  9:53 P.M.
DAVIS……………………28 ENE AT  9:52 P.M. RMY 27
FASTEST MILE FOR YESTERDAY………………….20 ENE AT  5:30 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….20 E   AT  5:31 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………20 E   AT  5:31 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..11.4 ENE
ASOS…………………..11.2
DAVIS………………….12.0 ENE [79 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.03  DEPARTURE……-0.16
ASOS…………..0.04
TOTAL PRECIPITATION FOR THE MONTH……….3.49  DEPARTURE……-1.00
ASOS…………..3.63
TOTAL PRECIPITATION FOR THE YEAR………..8.15  DEPARTURE……-4.76
ASOS…………..8.54

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE…….-0.3
TOTAL SNOWFALL FOR THE MONTH…………….2.8  DEPARTURE…….-8.2
TOTAL SNOWFALL FOR THE SEASON…………..27.6  DEPARTURE……-30.4

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/…./0.0/…/..        30 S   AERO 30 S   RMY N/A
03/04  50/38/44/+12/…./0.0/…/..        56 W   AERO 56 W   RMY 58
03/05  51/32/42/+10/0.00/0.0/…/..        31 W   AERO 31 NW  RMY 32
03/06  47/30/39/+7/…./…/…/..         46 NE  AERO 45 NE  RMY 46
03/07  43/26/35/+2/…./…/…/..         42 N   AERO 43 N   RMY 44
03/08  53/26/40/+7/0.00/0.0/…/..         31 W   AERO 30 W   RMY 28
03/09  72/40/56/+23/0.00/0.0/…/..        32 SW  AERO 32 SW  RMY 31
03/10  68/49/59/+26/0.00/0.0/…/..        48 WSW AERO 46 WSW RMY 49
03/11  56/37/47/+13/0.00/0.0/…/..        31 WNW AERO M  M   RMY 21
03/12  46/31/39/+5/…./0.0/…/..         21 SE  AERO 18 SE  RMY N/A
03/13  59/38/49/+15/…./0.0/…/..        46 WNW AERO 44 WNW RMY 46
03/14  51/35/43/+8/0.00/0.0/…/..         37 W   AERO 36 W   RMY 35
03/15  47/28/38/+3/0.00/0.0/…/..         28 NW  AERO 28 NW  RMY N/A
03/16  36/22/29/-6/0.00/0.0/…/..         21 NE  AERO 21 ESE RMY 21
03/17  43/28/36/0/…./0.4/…/..          29 W   AERO 30 W   RMY 29
03/18  54/31/43/+7/…./0.0/…/..         26 S   AERO 26 S   RMY 26
03/19  43/37/40/+4/…./0.0/…/..         36 E   AERO 35 E   RMY 34
03/20  66/37/52/+15/…./0.0/…/..        48 W   AERO 48 W   RMY 46
03/21  55/29/42/+5/0.00/0.0/…/..         45 W   AERO 48 W   RMY N/A
03/22  36/23/30/-7/0.00/0.0/…/..         23 NE  AERO 24 NE  RMY 23
03/23  40/25/33/-5/…./1.6/…/..         38 NNE AERO 39 NNE RMY 38
03/24  48/33/41/+3/…./…/…/..         37 NNW AERO 37 NNW RMY N/A
03/25  41/35/38/0/0.03/0.0/…/..          28 ENE AERO 28 ENE RMY 27

03/26 The low since midnight is 30F, daily normal minimum is 30F

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

RECORDS FOR MARCH 26
HIGH 76 IN 1922, 1949
LOW 6 IN 1960
PRECIP 1.99 INS. IN 1988
SNOWFALL 5.4 INS. IN 2001
PEAK GUST 63 MPH S IN 1970

RECORDS FOR MARCH 27
HIGH 78 IN 1998
LOW 12 IN 1975
PRECIP 1.05 INS. IN 1913
SNOWFALL 6.6 INS. IN 1959
PEAK GUST 62 MPH NW IN 1965, SE IN 1992

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

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