Thursday, March 28, 2019
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, MARCH 28, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME
A FAIR WEATHER DAY WITH DROPPING PRESSURE AND INCREASING
AFTERNOON WINDS….
We observed a rather limited visibility of 50 miles at most
due to a distant haze. Wind picked up in the afternoon, with
the highest gust of 32 mph occurring shortly before the 1 P.M.
observation. The wind increase happened in conjunction with a
pressure drop of almost 4 millibars between 10 A.M. and 1 P.M.
A smoke plume could be observed a few miles south of Boston
at 10 A.M. Despite freezing overnight lows the last couple
nights, both Houghton’s Pond and Lake Ponkapoag have remained
unfrozen. We have reached a high of 50F so far today, 3 degrees
above the daily normal maximum of 48F. The low since midnight
is 28F, 2 degrees below the normal minimum of 30F.
Today’s Observations:
7 A.M.
Weather: Few distant cumulus in all directions
Temperature: 31F; Dew Point: 25F; Wind: S at 10G14 kts
Sea-level pressure: 30.47 ins. Hg, rising then falling
Visibility: 40 miles, distant haze
6-hr Max temp: 31F
6-hr Min temp: 28F
24-hr Precip: 0.00 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1155 CLR 40 320/31/25/1910G14/047/ FEW CI
DSNT HZ ALQDS/ 8/001 50006 10031 20028
10 A.M.
Weather: Scattered cirrus, few distant cumulus E-SW
Temperature: 45F; Dew Point: 25F; Wind: S at 15G20 kts
Sea-level pressure: 30.44 ins. Hg, falling steadily
Visibility: 50 miles, smoke plume to the north
3-hr Precip: 0.00 ins.
BHO SA 1455 250 SCT 50 307/45/25/1815G20/044/ FEW DSNT
CU E-SW K PLUME N/ 8/101 58013
1 P.M.
Weather: Scattered cirrus, few distant cumulus SE-SW
Temperature: 49F; Dew Point: 30F; Wind: S at 16G28 kts,
Peak Wind: 32 MPH (28 kts) S at 12:54 P.M.
Sea-level pressure: 30.32 ins. Hg, falling rapidly
Visibility: 45 miles
6-hr Max temp: 50F
6-hr Min temp: 31F
6-hr Precip: 0.00 ins.
6-hr snowfall: 0.0 ins.
BHO SA 1755 250 SCT 45 269/49/30/1916G28/032/ FEW DSNT
CU SE-SW PK WND 1928/54/ 8/102 58038 10050 20031
SUMMARY FOR WEDNESDAY, MARCH 27, 2019
TEMPERATURE (DEGREES F)
MAX…..42 NORMAL…..48
MIN…..24 NORMAL…..30
MEAN….33 NORMAL…..39
DEPARTURE FROM 30-YEAR NORMAL…………………….-6
TOTAL DEPARTURE FOR THE MONTH……………………-35 [-1.5 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..32 DEPARTURE………+6
TOTAL HEATING UNITS FOR THE MONTH………….850 DEPARTURE……..+35
TOTAL HEATING UNITS FOR THE SEASON………..5336 DEPARTURE……..-47
TOTAL HEATING UNITS LAST SEASON TO DATE……4987 DIFFERENCE……+349
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..21 S AT 8:21 P.M.
AERO…………………….M
ASOS…………………….23 S AT 8:21 P.M.
DAVIS……………………24 S AT 7:49 P.M. RMY 23
FASTEST MILE FOR YESTERDAY………………….17 S AT 9:52 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….17 S AT 8:54 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………18 S AT 10:24 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..9.1 S
ASOS…………………..9.0
DAVIS………………….9.7 ESE [319 deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00 DEPARTURE…….-0.19
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….3.95 DEPARTURE…….-0.92
ASOS…………..3.96
TOTAL PRECIPITATION FOR THE YEAR……….12.91 DEPARTURE…….-0.38
ASOS………….13.03
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0 DEPARTURE……..-0.3
TOTAL SNOWFALL FOR THE MONTH……………23.1 DEPARTURE…….+11.5
TOTAL SNOWFALL FOR THE SEASON…………..47.6 DEPARTURE…….-11.0
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/…./…/462/71 16 NNW AERO 13 NNW RMY 22
03/02 31/27/29/-2/…./…/000/00 29 NNE AERO 22 NNE RMY 30
03/03 40/25/33/+1/…./…/354/54 21 ESE AERO 14 ESE RMY N/A
03/04 35/18/27/-5/…./…/126/19 33 W AERO 18 W RMY 32
03/05 29/10/20/-12/0.00/0.0/642/97 28 WNW AERO 12 SW RMY N/A
03/06 24/10/17/-15/0.00/0.0/648/97 40 WNW AERO 25 WNW RMY 41
03/07 26/6/16/-17/0.00/0.0/348/52 35 W AERO 18 W RMY 34
03/08 35/11/23/-10/0.00/0.0/540/80 23 WSW AERO M M RMY M
03/09 43/22/33/0/0.00/0.0/660/98 20 WSW AERO M M RMY N/A
03/10 40/26/33/0/…./…/000/00 32 ESE AERO 23 S RMY 32
03/11 48/33/41/+7/…./…/534/79 40 NW AERO 37 NNW RMY 41
03/12 41/27/34/0/…./…/480/70 32 N AERO 33 N RMY 34
03/13 43/24/34/0/…./…/390/57 18 W AERO 21 W RMY 23
03/14 48/32/40/0/…./…/114/17 25 S AERO 28 S RMY M
03/15 58/40/49/+14/0.12/0.0/000/00 37 SSW AERO 38 SSW RMY 39
03/16 50/31/41/+6/0.00/0.0/672/97 45 W AERO 46 W RMY 48
03/17 40/26/33/-3/0.00/0.0/570/82 40 WNW AERO M M RMY N/A
03/18 41/22/32/-4/0.00/0.0/702/100 29 W AERO M M RMY 30
03/19 44/25/35/-1/0.00/0.0/570/81 25 W AERO M M RMY N/A
03/20 50/27/39/+2/0.00/0.0/…/.. 26 S AERO M M RMY 29
03/21 50/33/42/+5/…./…/…/.. 25 SSE AERO M M RMY 46
03/22 39/34/37/0/…./…/…/.. 40 W AERO M M RMY 44
03/23 45/28/37/-1/0.00/0.0/…/.. 45 WNW AERO M M RMY 50
03/24 56/29/43/+5/0.00/0.0/…/.. 28 W AERO M M RMY 30
03/25 49/32/41/+3/0.00/0.0/…/.. 25 NNW AERO M M RMY N/A
03/26 43/27/35/-4/0.00/0.0/…/.. 28 NW AERO M M RMY 28
03/27 42/24/33/-6/0.00/0.0/…/.. 21 S AERO M M RMY 23
03/28 Low temp since midnight is 28F; normal low is 31F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR MARCH 28
HIGH 86 IN 1998
LOW 7 IN 1923
PRECIP 2.31 INS. IN 1932
SNOWFALL 3.0 INS. IN 1932
PEAK GUST 60e MPH NW IN 1944, 60 WSW IN 1991
RECORDS FOR MARCH 29
HIGH 85 IN 1945
LOW -2 IN 1923
PRECIP 2.78 INS. IN 1984
SNOWFALL 13.5 INS. IN 1984
PEAK GUST 95 MPH ENE IN 1984
TODAY’S REPORT PREPARED BY: Benjamin Turner
