Sunday, March 27, 2016

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, MARCH 27, 2016 EASTER SUNDAY
ALL TIMES ARE IN EASTERN STANDARD TIME

ANOTHER OVERCAST OF STRATUS AND STRATOCUMULUS LIKE YESTERDAY MORNING
LOW CLOUDS DISSIPATE LIKE YESTERDAY TO JUST A FEW WITH CIRRUS ABOVE
TEMPERATURES CONTINUE COLD BUT RISING SLIGHTLY PAST THE 42 OF SATURDAY

Early morning Easter sunrise was covered by low clouds although
there was brightening to our east along the horizon the disc of
sun did not appear. By late morning the low clouds had pretty
much dissipated leaving just mostly thin cirrus in a sunny sky.
Like yesterday the thermometer was slow to rise into the 40’s
despite the sunshine. A very light onshore flow off the chilly
ocean (near 40 degrees) to our east was making the sunshine
quite ineffective at warming things up. The normal high temperature
is now 48 degrees.
Winds were very light averaging less than 5 MPH for the six
hours ending at 2 P.M. EDT

Today’s Observations:

7 A.M.
Weather: Overcast Stratus, bright spots in overcast distant
ENE-SE-SW, along the horizon
Temperature: 32F; Dew Point: 28F; Wind: N at 4 kts
Sea-level pressure: 30.45 ins. Hg, rising slightly
Visibility: 30 miles, except 40 miles NE-E, light distant
haze/thin fog
6-hr Max temp: 32F
6-hr Min temp: 31F
24-hr precip: 0.00
BHO SA 1155 E13 OVC 30 311/32/28/3504/045/ BRGHT SKY DSNT ENE-SE-SSW
ALG HRZN VSBY NE-E 40 LGT DSNT HZ/FG ALQDS WND L/V/
8/6// 53005 10032 20031

10 A.M.
Weather: Overcast stratocumulus, bright spots and breaks in the
overcast
Temperature: 36F; Dew Point: 28F; Wind: NNW at 3 kts,
Sea-level pressure: 30.44 ins. Hg, falling slightly
Visibility: 30 miles, except 45 miles NNE, distant haze
BHO SA 1455 E14 OVC 30 307/36/28/3403/044/ BRGHT SPTS AND BINOVC
VSBY NNE 45 DSNT HZ ALQDS WND L/V/ 8/5// 58004

1 P.M.
Weather: Thin broken cirrus, few stratocumulus NW-N AND
stratus, stratocumulus layer offshore distant NE-ESE
Temperature: 44F; Dew Point: 31F; Wind: ENE at 6 kts,
Wind: light and variable
Sea-level pressure: 30.38 ins. Hg, falling then more rapidly
Visibility: 40 miles, except 55 miles NNE
6-hr Max temp: 44F
6-hr Min temp: 32F
6-hr precip: 0.00 ins.
BHO SA 1755 250 –BKN 40 288/44/31/0606/038/ SC NW-N STRA/SC
LYR OFFSHR NE-ESE VSBY NE 55 LGT HZ WND L/V/ 8/501 58019
10044 20032

SUMMARY FOR SATURDAY, MARCH 26, 2016

TEMPERATURE (DEGREES F)
MAX…..43   NORMAL…..48
MIN…..30   NORMAL…..30
MEAN….37   NORMAL…..39

DEPARTURE FROM 30-YEAR NORMAL…………………….-2
TOTAL DEPARTURE FOR THE MONTH…………………..+160 [+6.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..28   DEPARTURE……….+2
TOTAL HEATING UNITS FOR THE MONTH………….629   DEPARTURE……..-160
TOTAL HEATING UNITS FOR THE SEASON………..4312   DEPARTURE…….-1046
TOTAL HEATING UNITS LAST SEASON TO DATE……5594   DIFFERENCE……-1282

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….22 N  AT 12:37 A.M.
ASOS……………………25 N  AT 12:37 A.M.
DAVIS…………………..24 N  AT 12:37 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY…………………18 N  AT 12:37 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………18 N  AT 12:37 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..17 N  AT 12:37 A.M.
AVERAGE WIND SPEED AND DIRECTION………….9.3  ENE
ASOS………………….9.3
DAVIS…………………8.0  NNE [030 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……….2.80  DEPARTURE……-1.88
ASOS…………..2.80
TOTAL PRECIPITATION FOR THE YEAR……….12.17  DEPARTURE……-0.93
ASOS………….12.76

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE…….-0.3
TOTAL SNOWFALL FOR THE MONTH…………….4.4  DEPARTURE…….-6.9
TOTAL SNOWFALL FOR THE SEASON…………..42.5  DEPARTURE……-16.3

PRELIMINARY CLIMATE SUMMARY FOR MARCH CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/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

3/1   45/30/38/+7/0.00/0.0/602/89           54 W   AERO 60 W   RMY 53
3/2   52/21/37/+6/0.41/0.0/204/30           44 WNW AERP 47 NW  RMY 42
3/3   34/16/25/-7/0.00/0.0/641/94           30 WNW AERO 36 WNW RMY N/A
3/4   30/24/27/-5/…./…/000/00           32 N   AERO 38 N   RMY 34
3/5   35/20/28/-4/0.00/0.0/536/78           31 N   AERO 36 N   RMY N/A
3/6   40/25/33/+1/0.00/0.0/593/86           21 SSE AERO 21 SSE RMY N/A
3/7   49/29/39/+6/0.00/0.0/173/25           43 SSW AERO 48 SSW RMY 45
3/8   55/35/45/+12/0.00/0.0/647/93          23 S   AERO 24 S   RMY N/A
3/9   75/38/57/+24/0.00/0.0/594/85          32 S   AERO 36 S   RMY 33
3/10  64/50/57/+24/…./0.0/000/00          31 NNW AERO 38 NNW RMY 32
3/11  56/38/47/+13/T/0.0/331/47             28 NNW AERO 36 NNW RMY 29
3/12  58/31/45/+11/0.00/0.0/650/92          30 SW  AERO 33 SW  RMY 30
3/13  63/46/55/+21/0.00/0.0/…/..          32 NW  AERO 35 NW  RMY 30
3/14  46/36/41/+6/…./T/000/00             32 E   AERO 33 E   RMY N/A
3/15  45/39/42/+7/…./0.0/000/00           36 ENE AERO 38 ENE RMY 34
3/16  48/39/44/+9/…./0.0/…/..           25 E   AERO 28 E   RMY N/A
3/17  63/40/52/+16/…./0.0/…/..          44 NW  AERO 48 NW  RMY 45
3/18  51/33/42/+6/0.01/0.0/…/..           43 WNW AERO 45 WNW RMY 43
3/19  44/25/35/-1/0.00/0.0/…/..           25 NNW AERO 28 NNW RMY 26
3/20  35/23/29/-8/…./…/…/..           25 NE  AERO 28 NE  RMY 25
3/21  41/26/34/-3/…./…/…/..           30 WNW AERO 33 WNW RMY 32
3/22  48/28/38/+1/…./…/…/..           33 W   AERO 37 W   RMY 36
3/23  62/39/51/+13/0.01/0.0/…/..          35 NE  AERO 40 NE  RMY 39
3/24  39/34/37/-1/…./0.0/…/..           31 ENE AERO 33 ENE RMY 32
3/25  55/37/46/+8/        /…/..           22 NNW AERO 22 NNW RMY 24
3/26  43/30/37/-2/0.00/0.0/…/..           22 N   AERO 24 N   RMY N/A

3/27  low temp since midnight is 30F; normal now 30F

DAILY RECORDS FOR MARCH 2016

***3/9/16: NEW DAILY RECORD MAXIMUM TEMPERATURE OF 75F,
BREAKS PREVIOUS RECORD OF 71F SET BACK IN 2000.***

***3/10/16: NEW DAILY RECORD HIGH MINIMUM TEMPERATURE OF 50F,
BREAKS PREVIOUS RECORD OF 42F SET AND TIED IN 1977, 2006***

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: Robert Skilling