Friday, March 15, 2019

| March 15, 2019 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, MARCH 15, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

UNSEASONABLY WARM AND HAZY FOLLOWING LIGHT
RAIN SHOWERS THIS MORNING….

Wind was moderate today, with an average speed at or
above 20 mph from the south. We had a max gust of 37 mph
occurring this morning. Visibility was limited by haze,
with only 35 miles being seen at most. Snow depth was 2 ins.
this morning, becoming nonexistent by the 1 P.M. observation.
We measured a total of 0.03 inches of rainfall between 7 A.M.
and 1 P.M.  The high so far today is 57F, 13 degrees above
the daily normal maximum of 44F. The low since midnight is 40F,
14 degrees above the normal minimum of 26F.

PRELIMINARY STATS FOR FEBRUARY 2019

TEMPERATURE, Deg. F
Avg. Max. 37.3 [+0.5]
Avg. Min. 21.6 [+2.5]
Mean      29.5 [+1.6]
24-hour corrected mean: 29.2
Max. for month: 62F on the 5th
Min. for month: 5F  on the 1st

HEATING DEGREE DAYS
Total heating units:    990 [-47]
Total for the season:  4486 [-82]
Total for last season: 4122

PRECIPITATION, Inches
Total: 3.61 [-0.46]
Greatest in 24 hrs: 1.14 ins. on the 12th-13th

SNOWFALL, Inches
Total: 12.1 [-1.8]
Greatest in 24 hrs: 4.7 ins. on the 17th-18th

WIND, mph
Avg. uncorrected wind speed: 12.9
Avg. corrected wind speed: 13.3
Prevailing wind direction: WNW at 22%
Peak gust and direction: 66 W on 25th

SUNSHINE:
Campbell-Stokes card minutes: 9132 minutes of possible 17148 or 53%
Astronomical total minutes:   9476 minutes of possible 17766 or 53%

Today’s Observations:

7 A.M.
Weather: Overcast stratocumulus
Temperature: 49F; Dew Point: 48F; Wind: S at 23G29 kts,
Sea-level pressure: 29.91 ins. Hg, falling, then more slowly
Visibility: 35 miles, Haze layer
6-hr Max temp: 49F
6-hr Min temp: 40F
24-hr Precip:  0.00 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 2 ins.
BHO SA 1155 E12 OVC 35 127/49/48/1823G29/991/ HZ ALQDS
PK WND 2332/06/ 8/6// 4/002 56021 10049 20040

10 A.M.
Weather: Overcast stratocumulus
Temperature: 53F; Dew Point: 50F; Wind: S at 20G24 kts,
Sea-level pressure: 29.86 ins. Hg, falling, then more rapidly
Visibility: 30 miles, Haze layer
3-hr Precip: 0.01 ins.
BHO SA 1455 E14 OVC 30 114/53/50/1920G24/986/ HZ ALQDS
PK WND 1928/08/ 8/6// 6001/ 58013

1 P.M.
Weather: Overcast stratocumulus
Temperature: 57F; Dew Point: 54F; Wind: S at 18G24 kts
Sea-level pressure: 29.83 ins. Hg, falling, then more rapidly
Visibility: 30 miles, Haze layer
6-hr Max temp: 57F
6-hr Min temp: 49F
6-hr Precip:  0.03 ins.
6-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1755 E19 OVC 30 101/57/54/2018G24/983/ HZ ALQDS
PK WND 2025/06/ 8/6// 6003/ 58022 10057 20049

SUMMARY FOR THURSDAY, MARCH 14, 2019

TEMPERATURE (DEGREES F)
MAX…..48   NORMAL…..44
MIN…..32   NORMAL…..26
MEAN….40   NORMAL…..35

DEPARTURE FROM 30-YEAR NORMAL…………………….+5
TOTAL DEPARTURE FOR THE MONTH……………………-51 [-3.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..25   DEPARTURE………-5
TOTAL HEATING UNITS FOR THE MONTH………….502   DEPARTURE……..+51
TOTAL HEATING UNITS FOR THE SEASON………..4988   DEPARTURE……..-61
TOTAL HEATING UNITS LAST SEASON TO DATE……4552   DIFFERENCE……+436

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..25 S   AT  11:15 P.M.
AERO…………………….28 S   AT  11:15 P.M.
ASOS…………………….28 S   AT  11:24 P.M.
DAVIS……………………29 S   AT  03:19 P.M. RMY M
FASTEST MILE FOR YESTERDAY………………….22 S   AT  11:23 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….22 S   AT  11:27 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………21 SSE AT  11:24 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..11.4 S
ASOS…………………..11.4
DAVIS………………….11.5 SSE [168 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE…….-0.17
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….2.85  DEPARTURE…….+0.44
ASOS…………..2.91
TOTAL PRECIPITATION FOR THE YEAR……….11.79  DEPARTURE…….+0.96
ASOS………….11.96

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE……..-0.4
TOTAL SNOWFALL FOR THE MONTH……………21.0  DEPARTURE…….+14.1
TOTAL SNOWFALL FOR THE SEASON…………..45.5  DEPARTURE……..-8.4

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 19/5/12/-14/0.00/0.0/552/95          29 W   AERO 28 W   RMY N/A
02/02 30/7/19/-7/0.00/0.0/318/55           32 WSW AERO 32 WSW RMY 31
02/03 38/27/33/+7/0.00/0.0/126/22          26 S   AERO 25 S   RMY N/A
02/04 59/33/46/+20/0.00/0.0/540/93         25 SSW AERO 28 SSW RMY N/A
02/05 62/39/51/+25/0.00/0.0/354/60         30 WNW AERO 29 WNW RMY 32
02/06 39/28/34/+8/0.35/T/396/67            24 NNW AERO 23 NNW RMY N/A
02/07 37/31/34/+7/0.35/0.0/000/00          28 ENE AERO 24 ENE RMY 28
02/08 51/27/39/+12/0.07/0.0/204/34         46 W   AERO 46 WNW RMY 51
02/09 32/20/26/-1/0.00/0.0/594/100         50 WNW AERO 52 WNW RMY 52
02/10 33/18/26/-1/0.00/0.0/510/85          24 WNW AERO 23 WNW RMY 25
02/11 34/21/28/+1/0.00/0.0/318/53          24 NNW AERO 23 NNW RMY 25
02/12 33/13/23/-4/0.90/2.8/000/00          32 E   AERO 30 E   RMY 26
02/13 39/29/34/+6/0.26/0.1/018/03          36 W   AERO 32 W   RMY 36
02/14 37/26/32/+4/0.00/0.0/594/97          44 WNW AERO 42 WNW RMY 45
02/15 49/29/39/+11/0.11/0.0/060/10         40 S   AERO 40 S   RMY 44
02/16 44/26/35/+7/0.00/0.0/504/82          25 NW  AERO 25 NW  RMY N/A
02/17 37/19/28/0/0.01/T/618/100            30 NNW AERO 25 NNW RMY N/A
02/18 30/16/23/-6/0.41/4.7/000/00          35 NW  AERO 36 NW  RMY 41
02/19 30/10/20/-9/0.00/0.0/618/99          35 NW  AERO 33 NW  RMY N/A
02/20 26/12/19/-10/0.12/0.3/000/00         16 WNW AERO 14 SSW RMY N/A
02/21 43/21/32/+3/0.33/0.7/294/47          36 W   AERO 33 W   RMY 38
02/22 43/30/37/+8/0.00/0.0/504/80          22 NW  AERO 21 NW  RMY 23
02/23 38/24/31/+1/0.00/0.0/336/53          18 NNW AERO 16 NNW RMY N/A
02/24 45/30/38/+8/0.40/0.0/000/00          41 W   AERO 37 W   RMY 47
02/25 37/25/31/+1/0.03/T/336/57            66 W   AERO 59 W   RMY M
02/26 29/14/22/-8/0.00/0.0/642/100         46 WNW AERO 39 WNW RMY 47
02/27 22/9/16/-15/0.10/1.2/180/28          35 WNW AERO 26 WNW RMY N/A
02/28 28/15/22/-9/0.17/2.3/486/75          22 NW  AERO 18 NW  RMY 22

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 38/17/28/-3/…./…/…/..           16 NNW AERO 13 NNW RMY 22
03/02 31/27/29/-2/…./…/…/.. 29 NNE AERO 22 NNE RMY 30
03/03 40/25/33/+1/…./…/…/..           21 ESE AERO 14 ESE RMY N/A
03/04 35/18/27/-5/…./…/…/..           33 W   AERO 18 W   RMY 32
03/05 29/10/20/-12/0.00/0.0/…/..          28 WNW AERO 12 SW  RMY N/A
03/06 24/10/17/-15/0.00/0.0/…/..          40 WNW AERO 25 WNW RMY 41
03/07 26/6/16/-17/0.00/0.0/…/..           35 W   AERO 18 W   RMY 34
03/08 35/11/23/-10/0.00/0.0/…/..          23 WSW AERO M  M   RMY M
03/09 43/22/33/0/0.00/0.0/…/..            20 WSW AERO M  M   RMY N/A
03/10 40/26/33/0/…./…/…/..            32 ESE AERO 23 S   RMY 32
03/11 48/33/41/+7/…./…/…/..           40 NW  AERO 37 NNW RMY 41
03/12 41/27/34/0/…./…/…/..            32 N   AERO 33 N   RMY 34
03/13 43/24/34/0/…./…/…/..            18 W   AERO 21 W   RMY 23
03/14 48/32/40/0/…./…/…/.. 25 S   AERO 28 S   RMY M

03/15 Low temp since midnight is 32F; normal low is 26F

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

RECORDS FOR MARCH 15
HIGH 80 IN 1990
LOW 6 IN 1993
PRE 2.86 INS. IN 2010
SNOW 12.0 INS. 1967
WIND 73e MPH ESE IN 1940

RECORDS FOR MARCH 16
HIGH 73 IN 1990
LOW 8 IN 1932
PRE 1.95 INS. IN 1900
SNOW 10.0 INS. IN 1896
WIND 79 MPH NE IN 1956

TODAY’S REPORT PREPARED BY: Benjamin Turner and Nick Rousseau

Category: Daily Discussions

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