Saturday, April 23, 2016

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, APRIL 23, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME

HIGH TEMPERATURE REACHES 80F FOR FIRST TIME THIS YEAR
NEW RECORD HIGH MINIMUM TEMPERATURE RECORDED FOR APRIL 22
LIGHT RAIN BEGAN LATE LAST NIGHT BUT ONLY 0.19 IN. BY EARLY TODAY

The high temperature reached 79.5 (80 degrees) in our Hazen shelter
and was the first time for this year and season for an 80.
Record warm temperatures continued overnight with 60 degrees at
midnight dropping down to only 57 by 8 A.M. EDT ob time this morning.

A new record high minimum temperature was established
for yesterday at 56F recorded for a low the night before last in
the early morning hours.  The high minimum of 56F breaks
the previous record of 55F set in 1977 and equaled in 1992.
Also, the first cooling degree day units of the year were at
3 as the day averaged 68 degrees, 19 degrees  above normal.

The 0.19 inch of rain measured this morning does little to
ease the increasingly long dry spell this month. The last
important rain was 1.41 inches on April 7 and only about a
half inch has fallen since then.

Today’s Observations:

7 A.M.
Weather: Broken nimbostratus, overcast nimbostratus, few stratus
fractus distant E, higher cloud visible vicinity NW, bright spots
in overcast SE, light rain occurring, thin fog
Temperature: 58F; Dew Point: 57F; Wind: NNW at 8 kts,
Wind: Direction variable WNW-N, direction gradually veering
Sea-level pressure: 29.78 ins. Hg, rising slightly
Visibility: 10 miles, except 15 miles NE, light rain and thin fog
6-hr Max temp: 61F
6-hr Min temp: 57F
24-hr precip: 0.19 in.
BHO SA 1155 E45 BKN 60 OVC 10R- 086/58/57/3308/978/ FEW STFRA DSNT E
HIER CLDS VSB VC NW BRGHT SPTS IOVC SE VSBY NE 15 THN FG ALQDS
WND 29V36 GRDLY VEERING PCPN VRY LGT/ 8/72/ 53003
ASOS 60009 70016 MANUAL 70019 10061 20057

10 A.M.
Weather: Scattered variable broken stratocumlus/stratus fractus,
overcast nimbostratus, light rain and thin fog
Temperature: 52F; Dew Point: 51F; Wind: NNW at 10 kts,
Wind: Direction variable WNW-N
Sea-level pressure: 29.83 ins. Hg, rising, then more quickly
Visibility: 10 miles, lower N-E, light rain and thin fog
3-hr precip: 0.01 in.
BHO SA 1455 8V SCT E25 10R- 101/52/51/3410/983/ 8 SCT V BKN
VSBY LWR N-E THN FG ALQDS WND 30V01/ 8/72/ 53015 MANUAL 6001/

1 P.M.
Weather: Overcast stratocumulus few small cumulus WNW-N
few stratus fractus distant ENE-SE, few altocumulus lenticularis
northwest, break in overcast, line of clearing WNW-N
Temperature: 55F; Dew Point: 51F; Wind: ENE at 5 kts,
Wind: Light
Sea-level Pressure: 29.81 ins. HG, falling slightly
Visibility: 50 miles, except lower NE-S, NW 60 distant haze
6-hr Max temp: 58F
6-hr Min temp: 52F
6-hr Precip: 0.03 in.
BHO SA 1754 E42 OVC 50 095/55/51/0705/981/ FEW SML CU W-N
BINOVC/LINE OF CLRG WNW-N FEW STFRA DSNT ENE-SE FEW ACSL
NW WND LGT VSBY LWR NE-S VSBY NW 60/ 8/8/40/ 58006 MANUAL
6003/ ASOS 60002 10058 20052

SUMMARY FOR FRIDAY, APRIL 22, 2016

TEMPERATURE (DEGREES F)
MAX…..80   NORMAL…..58
MIN…..56   NORMAL…..40
MEAN….68   NORMAL…..49

DEPARTURE FROM 30-YEAR NORMAL……………………+19
TOTAL DEPARTURE FOR THE MONTH…………………….-6 [-0.5] DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………0   DEPARTURE………-16
TOTAL HEATING UNITS FOR THE MONTH………….445   DEPARTURE……….+8
TOTAL HEATING UNITS FOR THE SEASON………..4864   DEPARTURE…….-1057
TOTAL HEATING UNITS LAST SEASON TO DATE……6127   DIFFERENCE……-1263

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….36  S  AT  3:18 P.M.
ASOS……………………37  S  AT  3:18 P.M.
DAVIS…………………..35 SSE AT  3:07 P.M. RMY 36
FASTEST MILE FOR YESTERDAY…………………27  S  AT  3:19 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………29  S  AT  3:19 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..27  S  AT  3:19 P.M.
AVERAGE WIND SPEED AND DIRECTION……………10.9 WSW
ASOS……………………11.4
DAVIS……………………9.8 SSW [210 Deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.19  DEPARTURE……+0.05
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….3.78  DEPARTURE……+0.31
ASOS…………..3.99
TOTAL PRECIPITATION FOR THE YEAR……….16.36  DEPARTURE……-1.11
ASOS………….17.00

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE…….-0.1
TOTAL SNOWFALL FOR THE MONTH……………15.0  DEPARTURE……+12.2
TOTAL SNOWFALL FOR THE SEASON…………..57.5  DEPARTURE…….-5.5

PRELIMINARY CLIMATE SUMMARY FOR APRIL 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

4/1  66/54/60/+19/…./0.0/092/12          39 SSW AERO N/A    RMY 43
4/2  54/40/47/+6/…./0.0/023/03           23 SSW AERO N/A    RMY N/A
4/3  40/23/32/-10/…./7.7/354/46          46 W   AERO N/A    RMY 55
4/4  28/21/25/-17/0.68/7.3/000/00          29 NNE AERO N/A    RMY 25
4/5  35/19/27/-16/0.00/0.0/660/85          25 NW  AERO N/A    RMY 27
4/6  41/21/31/-12/…./0.0/483/62          44 S   AERO N/A    RMY N/A
4/7  56/41/49/+6/…./0.0/000/00           53 SSE AERO 59 SSE RMY 55
4/8  52/32/42/-2/T/0.0/353/45              41 WSW AERO 45 WSW RMY 42
4/9  47/29/38/-6/0.00/0.0/417/53           33 NW  AERO 39 NW  RMY 32
4/10 49/26/38/-7/0.01/0.0/735/93           30 NW  AERO 32 NW  RMY 31
4/11 58/40/49/+4/0.00/T/182/23             47 S   AERO 52 S   RMY N/A
4/12 59/37/48/+3/0.30/0.0/040/05           53 S   AERO 60 S   RMY 54
4/13 53/33/43/-3/0.00/0.0/798/100          21 NNW AERO 25 NNW RMY 21
4/14 48/33/41/-5/0.00/0.0/793/99           28 ENE AERO 28 NNE RMY 26
4/15 54/35/45/-2/0.00/0.0/804/100          26 NNE AERO 28 NNE RMY N/A
4/16 52/39/46/-1/0.00/0.0/…/…          36 NNE AERO 31 NNE RMY 34
4/17 62/36/49/+2/0.00/0.0/…/…          20 NNE AERO 20 NNE RMY 19
4/18 67/45/56/+8/…/0.0/…/…           28 ENE AERO 29 NE  RMY 28
4/19 55/41/48/0/…/0.0/…/…            25 NW  AERO 30 NW  RMY N/A
4/20 57/41/49/0/0.00/0.0/…/…           29 NNW AERO 30 NNW RMY 29
4/21 76/38/57/+8/0.00/0.0/…/…          28 W   AERO 29 WSW RMY 28
4/22 80/56/68/+19/…./…/…          36 S   AERO 37 S   RMY 36

4/23 low temp since midnight is 57F; normal now 41F

DAILY RECORDS FOR APRIL 2016

4/1/16: NEW DAILY RECORD HIGH MINIMUM TEMPERATURE OF 54F,
BREAKS PREVIOUS RECORD OF 51F SET IN 1948

4/4/16: NEW DAILY RECORD SNOWFALL OF 7.3 INS,
BREAKS PREVIOUS RECORD OF 3.7 INS SET IN 1975

4/4/16: NEW DAILY RECORD LOW MAXIMUM TEMPERATURE OF 28F,
BREAKS PREVIOUS RECORD OF 32F SET AND TIED IN 1896, 1908, 1975

4/22/16: NEW DAILY RECORD HIGH MINIMUM TEMPERATURE OF 56F,
BREAKS PREVIOUS RECORD OF 55F IN 1977 AND 1992

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

RECORDS FOR APRIL 23
HIGH 85 IN 1908, 2007
LOW 25 IN 1933,1989
PRECIP 1.99 IN. IN 2012
SNOWFALL 2.0 IN. IN 2012
PEAK GUST 64 MPH WNW IN 1962

RECORDS FOR APRIL 24
HIGH 82 IN 2001
LOW 22 IN 1930
PRECIP 2.51 INS IN 1898
SNOWFALL 1.2 INS IN 1967
PEAK GUST 59 MPH NW IN 1962

TODAY’S REPORT PREPARED BY: Robert Skilling