Sunday, March 17, 2019

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, MARCH 17, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

SLIGHTLY BELOW SEASONABLE DUE TO A WESTERLY BREEZE,
BUT A FAIR WEATHER DAY OVERALL….

We observed an excellent visibility of 85 miles
throughout the day with scattered cumulus clouds
at each observation. Wind from the west increased
since this morning, with a peak gust of 30 mph since
7 A.M. Conditions remained dry, with an average
humidity around 40%. The high so far today is
40F, 4 degrees below the daily normal maximum of
44F. The low since midnight is 26F, a degree under
the normal minimum temperature of 27F.

Happy St. Patrick’s Day!

Today’s Observations:

7 A.M.
Weather: Broken stratocumulus, virga S-NW
Temperature: 29F; Dew Point: 13F; Wind: W at 8G12 kts,
Sea-level pressure: 30.09 ins. Hg, rising steadily
Visibility: 85 miles
6-hr Max temp: 30F
6-hr Min temp: 26F
24-hr Precip:  0.00 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1155 E50 BKN 85 189/29/13/2808G12/009/ VIRGA
S-NW/ 8/800 51023 10030 20026

10 A.M.
Weather: Scattered cumulus
Temperature: 35F; Dew Point: 10F; Wind: W at 16G22 kts,
Peak Wind: 30 mph (26 kts) W at 8:18 A.M.
Sea-level pressure: 30.11 ins. Hg, rising steadily
Visibility: 85 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 55 SCT 85 195/35/10/2816G22/011/ PK WND
2826/1318/ 8/100 51006

1 P.M.
Weather: Scattered cumulus
Temperature: 39F; Dew Point: 14F; Wind: W at 12G20 kts,
Peak Wind: 32 mph (28 kts) W at 11:06 A.M.
Sea-level pressure: 30.07 ins. Hg, falling steadily
Visibility: 85 miles
6-hr Max temp: 40F
6-hr Min temp: 29F
6-hr Precip:  0.00 ins.
6-hr snowfall: 0.0 ins.
BHO SA 1755 55 SCT 85 183/39/14/2812G20/007/ PK WND
2828/1606/ 8/100 58012 10040 20029

SUMMARY FOR SATURDAY, MARCH 16, 2019

TEMPERATURE (DEGREES F)
MAX…..50   NORMAL…..44
MIN…..31   NORMAL…..26
MEAN….41   NORMAL…..35

DEPARTURE FROM 30-YEAR NORMAL…………………….+6
TOTAL DEPARTURE FOR THE MONTH……………………-31 [-2.1 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..24   DEPARTURE………-6
TOTAL HEATING UNITS FOR THE MONTH………….542   DEPARTURE……..+31
TOTAL HEATING UNITS FOR THE SEASON………..5028   DEPARTURE……..-51
TOTAL HEATING UNITS LAST SEASON TO DATE……4618   DIFFERENCE……+410

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..45 W   AT  3:33 P.M.
AERO…………………….46 W   AT 10:52 A.M.
ASOS…………………….47 W   AT  3:34 P.M.
DAVIS……………………48 WSW AT  3:32 P.M. RMY 48
FASTEST MILE FOR YESTERDAY………………….34 W   AT 10:54 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….33 W   AT 10:53 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………35 WSW AT 10:53 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..20.3 W
ASOS…………………..18.1
DAVIS………………….20.3 WSW  [257 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……….2.97  DEPARTURE…….+0.20
ASOS…………..2.97
TOTAL PRECIPITATION FOR THE YEAR……….11.91  DEPARTURE…….+0.72
ASOS………….12.04

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…….+13.3
TOTAL SNOWFALL FOR THE SEASON…………..45.5  DEPARTURE……..-9.2

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 58/40/49/+14/0.12/…/…/..          37 SSW AERO 38 SSW RMY 39
03/16 50/31/41/+6/…./…/…/..           45 W   AERO 46 W   RMY 48

03/17 Low temp since midnight is 26F; normal low is 27F

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

RECORDS FOR MARCH 17
HIGH 69 IN 2003
LOW 6 IN 1885
PRECIP 1.97 INS. IN 1968
SNOWFALL 6.5 INS. IN 1956
PEAK GUST 70 MPH SSW IN 1973

RECORDS FOR MARCH 18
HIGH 72 IN 2012
LOW 0 IN 1885
PRECIP 5.61 INS. IN 1968 [RECORD FOR MONTH] SNOWFALL 9.3 INS. IN 1985
PEAK GUST 71e MPH WNW IN 1941

TODAY’S REPORT PREPARED BY: Benjamin Turner