Sunday, March 10, 2019

| March 10, 2019 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, MARCH 10, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

MIXED PRECIPITATION IN THE MORNING LEADS TO
RAIN IN THE AFTERNOON….

We measured an inch of snowfall between 7 A.M.
and 10 A.M., which was 0.13 inches of liquid after
melting. The other 0.17 measured at 1 P.M. was a mix
of ice pellets, freezing rain, and rain. Visibility
dropped from 35 miles to 5 miles in the afternoon
due to building fog. Pressure has been dropping
rapidly since the 7 A.M. observation, decreasing
almost 9 millibars. The high temperature so far
today of 33F is 10 degrees below the daily normal
maximum of 43F. The low since midnight is 26F,
two degrees above the normal minimum of 24F.

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 nimbostratus, few cumulus offshore
Temperature: 30F; Dew Point: 25F; Wind: SE at 12G15 kts
Sea-level pressure: 30.42 ins. Hg, falling steadily
Visibility: 35 miles
6-hr Max temp: 30F
6-hr Min temp: 28F
24-hr Precip:  0.00 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 9 ins.
BHO SA 1155 E110 OVC 35 300/30/25/1212G15/042/
FEW CU OFFSHR/ 8/12/ 4/009 56008 10030 20028

10 A.M.
Weather: Snow becoming ice pellets at 9:35,
overcast nimbostratus, few stratus fractus
Temperature: 29F; Dew Point: 29F; Wind: SE at 12G26 kts,
Peak wind: 32 MPH (28 kts) SE at 9:18 A.M.
Sea-level pressure: 30.29 ins. Hg, falling rapidly
Visibility: 20 miles, fog
3-hr Precip: 0.13 ins.
BHO SA 1455 E65 OVC 20IPF 257/29/29/1212G26/029/
FEW STFA S BCMG IP35 PCPN VRY LGT PK WND 1228/18
PRESFR/ 8/72/ 6013/ 58043

1 P.M.
Weather: Light rain, overcast nimbostratus
Temperature: 32F; Dew Point: 32F; Wind: E at 12G14 kts
Sea-level pressure: 30.16 ins. Hg, falling rapidly
Visibility: 5 miles, fog
6-hr Max temp: 33F
6-hr Min temp: 28F
6-hr Precip:  0.30 ins.
6-hr snowfall: 1.0 ins.
Snow depth: 8 ins.
BHO SA 1755 E65 OVC 5R-F 212/32/32/0812G14/016/
R-CTD PRESFR/ 8/02/ 4/008 6030/ 58045 10033 20028

SUMMARY FOR SATURDAY, MARCH 9, 2019

TEMPERATURE (DEGREES F)
MAX…..43   NORMAL…..42
MIN…..22   NORMAL…..24
MEAN….33   NORMAL…..33

DEPARTURE FROM 30-YEAR NORMAL……………………..0
TOTAL DEPARTURE FOR THE MONTH……………………-63 [-7.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..32   DEPARTURE……….0
TOTAL HEATING UNITS FOR THE MONTH………….359   DEPARTURE……..+63
TOTAL HEATING UNITS FOR THE SEASON………..4845   DEPARTURE……..-19
TOTAL HEATING UNITS LAST SEASON TO DATE……4388   DIFFERENCE……+457

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..20 WSW AT  2:42 A.M.
AERO……………………..M
ASOS…………………….20 WSW AT  2:42 A.M.
DAVIS……………………21 SW  AT  2:42 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………….16 WSW AT  4:48 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….15 E   AT  9:00 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………15 E   AT  8:50 P.M.
AVERAGE WIND SPEED AND DIRECTION……………9.6 SW
ASOS……………………9.8
DAVIS…………………..9.9 SW [218 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE…….-0.18
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….2.32  DEPARTURE…….+0.75
ASOS…………..2.35
TOTAL PRECIPITATION FOR THE YEAR……….11.26  DEPARTURE…….+1.27
ASOS………….11.40

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE……..-0.5
TOTAL SNOWFALL FOR THE MONTH……………20.0  DEPARTURE…….+15.4
TOTAL SNOWFALL FOR THE SEASON…………..44.5  DEPARTURE……..-7.1

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 Low temp since midnight is 26F; normal low is 25F

****Aerovane speed not working

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

RECORDS FOR MARCH 10
HIGH 69 IN 1977
LOW 2 IN 1984
PRECIP 2.00 INS. IN 1994
SNOWFALL 4.0 INS. IN 1997
PEAK GUST 80 MPH NW IN 1974

RECORDS FOR MARCH 11
HIGH 65 IN 1967
LOW 4 IN 1939, 1960
PRECIP 2.11 INS. IN 1901
SNOWFALL 6.3 INS. IN 1934
PEAK GUST 66e MPH W IN 1980

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

Leave a Reply