Wednesday, March 27, 2019

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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, MARCH 27, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

THE DRY SPELL CONTINUES ATOP GREAT BLUE HILL….

We observed an excellent visibility of 85 miles throughout
the day. Wind stayed northeasterly, blowing at an average of
10 mph. The highest gust so far today is 18 mph. Conditions
have remained dry for the past couple days, with an average
humidity of 32% being observed throughout the day. Cloud cover
has built up from completely clear skies this morning, with
some scattered cirrus at 1 P.M. We have reached a high of 41F
so far today, 7 degrees below the daily normal maximum of 48F.
The low since midnight is 24F, 7 degrees below the normal
minimum of 30F.

Today’s Observations:

7 A.M.
Weather: Clear
Temperature: 27F; Dew Point: 6F; Wind: N at 4 kts,
Wind: Light and variable
Sea-level pressure: 30.51 ins. Hg, rising steadily
Visibility: 85 miles
6-hr Max temp: 28F
6-hr Min temp: 24F
24-hr Precip:  0.00 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1155 CLR 85 332/27/6/3604/051/ WND L/V/ 51022
10028 20024

10 A.M.
Weather: Clear, few distant cirrus E-SW
Temperature: 36F; Dew Point: 5F; Wind: NE at 10G14 kts
Sea-level pressure: 30.56 ins. Hg, rising steadily
Visibility: 85 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 CLR 85 349/36/5/0410G14/056/ FEW DSNT
CI E-SW/ 8/001 51017

1 P.M.
Weather: Scattered cirrus
Temperature: 39F; Dew Point: 6F; Wind: NE at 4 kts,
Wind: Light and variable
Sea-level pressure: 30.53 ins. Hg, rising then falling
Visibility: 80 miles
6-hr Max temp: 41F
6-hr Min temp: 27F
6-hr Precip:  0.00 ins.
6-hr snowfall: 0.0 ins.
BHO SA 1755 300 SCT 80 342/39/6/0404/053/ WND L/V/
8/001 58007 10041 20027

SUMMARY FOR TUESDAY, MARCH 26, 2019

TEMPERATURE (DEGREES F)
MAX…..43   NORMAL…..48
MIN…..27   NORMAL…..30
MEAN….35   NORMAL…..39

DEPARTURE FROM 30-YEAR NORMAL…………………….-4
TOTAL DEPARTURE FOR THE MONTH……………………-29 [-1.3 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..30   DEPARTURE………+4
TOTAL HEATING UNITS FOR THE MONTH………….818   DEPARTURE……..+29
TOTAL HEATING UNITS FOR THE SEASON………..5304   DEPARTURE……..-53
TOTAL HEATING UNITS LAST SEASON TO DATE……4957   DIFFERENCE……+347

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..28 NW  AT  4:10 P.M.
AERO…………………….M
ASOS…………………….28 NW  AT  4:21 P.M.
DAVIS……………………30 W   AT  4:10 P.M.  RMY 28
FASTEST MILE FOR YESTERDAY………………….21 NW  AT  4:20 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….20 NW  AT  4:21 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………20 W   AT  4:12 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..11.1 NNW
ASOS…………………..11.5
DAVIS………………….11.4 NW [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…….-0.73
ASOS…………..3.96
TOTAL PRECIPITATION FOR THE YEAR……….12.91  DEPARTURE…….-0.19
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…….+11.8
TOTAL SNOWFALL FOR THE SEASON…………..47.6  DEPARTURE…….-10.7

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 Low temp since midnight is 24F; normal low is 30F

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

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

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

TODAY’S REPORT PREPARED BY: Benjamin Turner