Sunday, April 7, 2019

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, APRIL 7, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

WARM DAY WITH A PARTLY CLOUDY MORNING MAKING WAY
FOR OVERCAST SKIES IN THE AFTERNOON….

This morning, the sky was only partially obstructed
with some scattered altocumulus clouds early on.
At the 10 o’clock observation, about two-thirds
of the sky was obstructed, and by 1 o’clock, nearly
overcast conditions were experienced at the observatory.
Temperatures today have been warm, reaching up to 63F
so far, which is 11 degrees above our normal maximum
temperature for today. Wind speeds have increased
slightly through the day from calm wind early
this morning to regular gusts up to 16 knots by
the late morning into the early afternoon.

PRELIMINARY STATS FOR MARCH 2019

TEMPERATURE, Deg. F
Avg. Max. 44.0 [-0.3] Avg. Min. 26.1 [-0.5] Mean      35.1 [-0.4] 24-hour corrected mean: 34.7
Max. for month: 67F on the 30th
Min. for month: 6F  on the 7th

HEATING DEGREE DAYS
Total heating units:    919 [+3] Total for the season:  5405 [-79] Total for last season: 5058

PRECIPITATION, Inches
Total: 4.08 [-1.50] Greatest in 24 hrs: N/A

SNOWFALL, Inches
Total: 23.1 [+10.4] Greatest in 24 hrs: N/A

WIND, mph
Avg. uncorrected wind speed: 13.2
Avg. corrected wind speed: 13.5
Prevailing wind direction: W at 20%
Peak gust and direction: 53 S on 31st

SUNSHINE:
Campbell-Stokes card minutes: 12612 minutes of possible 21516 or 59%
Astronomical total minutes:   13031 minutes of possible 22220 or 59%

Today’s Observations:

7 A.M.
Weather: Scattered altocumulus
Temperature: 45F; Dew Point: 37F; Wind: SE at 5 kts
Wind: light
Sea-level pressure: 30.28 ins. Hg, falling then rising
Visibility: 70 miles
6-hr Max temp: 45F
6-hr Min temp: 41F
24-hr Precip:  0.00 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1155 130 SCT 70 253/45/37/1305/028/ DSNT HZ
ALQDS WND LGT/ 8/050 50002 10045 20041

10 A.M.
Weather: Broken altocumulus
Temperature: 58F; Dew Point: 35F; Wind: SW at 6 kts
Sea-level pressure: 30.31 ins. Hg, increasing, then more slowly
Visibility: 70 miles, distant haze in all directions
3-hr Precip: 0.00 ins.
BHO SA 1455 E140 BKN 70 264/58/35/2306/031/ DSNT HZ ALQDS/ 8/050
51011

1 P.M.
Weather: Broken altostratus
Temperature: 62F; Dew Point: 40F; Wind: SW at 9 kts
Sea-level pressure: 30.24 ins. Hg, falling, then more quickly
Visibility: 70 miles, distant haze in all directions
6-hr Max temp: 63F
6-hr Min temp: 45F
6-hr Precip:  0.00 ins.
6-hr snowfall: 0.0 ins.
BHO SA 1755 E140 BKN 70 242/62/40/2209/024/ DSNT HZ ALQDS/ 8/010
58022 10063 20045

SUMMARY FOR SATURDAY, APRIL 6, 2019

TEMPERATURE (DEGREES F)
MAX…..64   NORMAL…..52
MIN…..32   NORMAL…..35
MEAN….48   NORMAL…..43

DEPARTURE FROM 30-YEAR NORMAL…………………….+5
TOTAL DEPARTURE FOR THE MONTH……………………..0 [-0.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..17   DEPARTURE………-5
TOTAL HEATING UNITS FOR THE MONTH………….138   DEPARTURE……….0
TOTAL HEATING UNITS FOR THE SEASON………..5543   DEPARTURE……..-79
TOTAL HEATING UNITS LAST SEASON TO DATE……5217   DIFFERENCE……+326

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..24 NW  AT 7:07 P.M.
AERO…………………….18 W   AT 2:01 P.M.
ASOS…………………….26 NNW AT 7:09 P.M.
DAVIS……………………25 WSW AT 1:36 P.M.  RMY 26
FASTEST MILE FOR YESTERDAY………………….19 W   AT 2:01 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….17 W   AT 3:14 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………19 WSW AT 2:01 P.M.
AVERAGE WIND SPEED AND DIRECTION……………8.8 NW
ASOS……………………9.0
DAVIS…………………..9.1 WSW [254 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE…….-0.17
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.66  DEPARTURE…….-0.36
ASOS…………..0.64
TOTAL PRECIPITATION FOR THE YEAR……….13.70  DEPARTURE…….-1.32
ASOS………….13.79

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE……..-0.1
TOTAL SNOWFALL FOR THE MONTH…………….0.0  DEPARTURE……..-1.1
TOTAL SNOWFALL FOR THE SEASON…………..47.6  DEPARTURE…….-13.2

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/-3/0.00/0.5/479/71           16 NNW AERO 13 NNW RMY 22
03/02 31/27/29/-2/0.48/3.7/000/00           29 NNE AERO 22 NNE RMY 30
03/03 40/25/33/+1/0.12/1.5/367/54           21 ESE AERO 14 ESE RMY N/A
03/04 35/18/27/-5/1.70/14.3/130/19          33 W   AERO 18 W   RMY 32
03/05 29/10/20/-12/0.00/0.0/664/97          28 WNW AERO 12 SW  RMY N/A
03/06 24/10/17/-15/0.00/0.0/667/97          40 WNW AERO 25 WNW RMY 41
03/07 26/6/16/-17/0.00/0.0/359/52           35 W   AERO 18 W   RMY 34
03/08 35/11/23/-10/0.00/0.0/555/80          23 WSW AERO M  M   RMY M
03/09 43/22/33/0/0.00/0.0/683/98            20 WSW AERO M  M   RMY N/A
03/10 40/26/33/0/0.53/1.0/000/00            32 ESE AERO 23 S   RMY 32
03/11 48/33/41/+7/0.00/0.0/555/79           40 NW  AERO 37 NNW RMY 41
03/12 41/27/34/0/0.00/0.0/494/70            32 N   AERO 33 N   RMY 34
03/13 43/24/34/0/0.00/0.0/404/57            18 W   AERO 21 W   RMY 23
03/14 48/32/40/0/0.00/0.0/121/17            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/+6/0.00/0.0/695/97           45 W   AERO 46 W   RMY 48
03/17 40/26/33/-3/0.00/0.0/590/82           40 WNW AERO M  M   RMY N/A
03/18 41/22/32/-4/0.00/0.0/694/96           29 W   AERO M  M   RMY 30
03/19 44/25/35/-1/0.00/0.0/587/81           25 W   AERO M  M   RMY N/A
03/20 50/27/39/+2/0.00/0.0/684/94           26 S   AERO M  M   RMY 29
03/21 50/33/42/+5/0.02/0.0/227/31           25 SSE AERO M  M   RMY 46
03/22 39/34/37/0/0.86/T/000/00              40 W   AERO M  M   RMY 44
03/23 45/28/37/-1/0.12/2.1/523/71           45 WNW AERO M  M   RMY 50
03/24 56/29/43/+5/0.00/0.0/437/59           28 W   AERO M  M   RMY 30
03/25 49/32/41/+3/0.00/0.0/468/63           25 NNW AERO M  M   RMY N/A
03/26 43/27/35/-4/0.00/0.0/716/96           28 NW  AERO M  M   RMY 28
03/27 42/24/33/-6/0.00/0.0/703/94           21 S   AERO M  M   RMY 23
03/28 51/28/40/+1/0.00/0.0/623/83           35 S   AERO M  M   RMY 37
03/29 53/40/47/+7/0.02/0.0/000/00           26 SSW AERO M  M   RMY 27
03/30 67/40/54/+14/0.00/0.0/477/63          44 S   AERO M  M   RMY 46
03/31 65/34/50/+9/0.10/0.0/129/17           53 S   AERO 52 S   RMY 55

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

04/01 45/29/37/-4/0.00/0.0/…/..           40 WNW AERO 37 W   RMY 42
04/02 50/27/39/-2/…./…/…/..           29 S   AERO 25 S   RMY 31
04/03 62/35/49/+7/…./…/…/..           54 W   AERO 58 W   RMY 56
04/04 50/34/42/0/…./…/…/..            46 W   AERO 41 W   RMY N/A
04/05 47/27/37/-6/…./…/…/..           23 SSW AERO 17 SSW RMY 23
04/06 64/32/48/+5/…./…/…/..           24 NW  AERO 18 W   RMY 26

04/07 Low temp since midnight is 41F; normal low is 35F

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

RECORDS FOR APRIL 7
HIGH 90 IN 2010
LOW 13 IN 1982
PRECIP 1.72 IN. IN 1924
SNOWFALL 4.5 IN. IN 1967, 1996
PEAK GUST 65 MPH WNW IN 1982

RECORDS FOR APRIL 8
HIGH 87 IN 1991
LOW 17 IN 1888
PRECIP 1.78 IN. IN 1956
SNOWFALL 9.3 IN. IN 1956
PEAK GUST 70 MPH S IN 2000

TODAY’S REPORT PREPARED BY: Samantha Richard