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Monday, April 22, 2019

April 22, 2019

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, APRIL…

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, APRIL 22, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

FOGGY CONDITIONS WITH AFTERNOON RAINFALL ATOP
GREAT BLUE HILL….

Fog has limited visibility to under 10 miles for the
majority of the day. Wind has remained northeasterly,
blowing at an average of 15 mph. Rain began shortly
following noontime, leaving 0.14 inches in the gauge
by the 1 P.M. observation. Light rain overnight was
measured to be 0.02 inches at 7 A.M. The high so far
today is 53F, 5 degrees below the daily normal of 58F.
The low since midnight is 48F, 8 degrees above the
normal minimum of 40F.

Today’s Observations:

7 A.M.
Weather: Broken altocumulus, few stratus fractus
Temperature: 52F; Dew Point: 52F; Wind: NE at 9G13 kts
Sea-level pressure: 30.10 ins. Hg, rising steadily
Visibility: 5 miles, fog
6-hr Max temp: 52F
6-hr Min temp: 52F
24-hr Precip: 0.02 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1155 E100 BKN 5F 193/52/52/0409G13/010/ FEW STFA
ALQDS/ 8/770 70002 53005 10052 20050

10 A.M.
Weather: Overcast altocumulus, few stratus fractus
Temperature: 50F; Dew Point: 50F; Wind: NE at 10G18 kts
Sea-level pressure: 30.08 ins. Hg, falling steadily
Visibility: 10 miles, fog
3-hr Precip: 0.00 ins.
BHO SA 1455 E100 OVC 10F 185/50/50/0410G18/008/ FEW STFA
ALQDS/ 8/770 58008

1 P.M.
Weather: Light drizzle earlier on in the hour intensifies
to light rain
Temperature: 48F; Dew Point: 48F; Wind: NNE at 12G20 kts
Sea-level pressure: 30.06 ins. Hg, falling steadily
Visibility: 1/2 mile, fog
6-hr Max temp: 53F
6-hr Min temp: 48F
6-hr Precip: 0.14 ins.
6-hr snowfall: 0.0 ins.
BHO SA 1755 W3 X 1/2R-F 180/48/48/0312G20/006/ L- BCMG R-UKN/
8//// 6014/ 55007 10053 20048

SUMMARY FOR SUNDAY, APRIL 21, 2019

TEMPERATURE (DEGREES F)
MAX…..68   NORMAL…..58
MIN…..51   NORMAL…..40
MEAN….60   NORMAL…..49

DEPARTURE FROM 30-YEAR NORMAL…………………..+11
TOTAL DEPARTURE FOR THE MONTH…………………..+77 [+3.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………5   DEPARTURE……..-11
TOTAL HEATING UNITS FOR THE MONTH………….349   DEPARTURE……..-88
TOTAL HEATING UNITS FOR THE SEASON………..5754   DEPARTURE…….-167
TOTAL HEATING UNITS LAST SEASON TO DATE……5589   DIFFERENCE……+165

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..35 S   AT 12:10 A.M.
AERO…………………….35 S   AT 12:05 A.M.
ASOS…………………….33 SW  AT 12:41 A.M.
DAVIS……………………36 SE  AT 12:12 A.M.  RMY N/A
FASTEST MILE FOR YESTERDAY………………….24 S   AT 12:48 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….26 SW  AT 12:42 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………25 S   AT  1:01 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..10.1 S
ASOS……………………9.8
DAVIS………………….10.6 SSE [166 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.02  DEPARTURE…….-0.11
ASOS…………..0.01
TOTAL PRECIPITATION FOR THE MONTH……….3.39  DEPARTURE…….+0.05
ASOS…………..3.24
TOTAL PRECIPITATION FOR THE YEAR……….16.43  DEPARTURE…….-0.91
ASOS………….16.39

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M………0.0  DEPARTURE………0.0
TOTAL SNOWFALL FOR THE MONTH………….TRACE  DEPARTURE……..-2.7
TOTAL SNOWFALL FOR THE SEASON………….47.6  DEPARTURE…….-14.8

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/-4/0.00/0.0/726/98           40 WNW AERO 37 W   RMY 42
04/02 50/27/39/-2/…./0.0/582/79           29 S   AERO 25 S   RMY 31
04/03 62/35/49/+7/…./0.0/468/63           54 W   AERO 58 W   RMY 56
04/04 50/34/42/0/…./0.0/690/93            46 W   AERO 41 W   RMY N/A
04/05 47/27/37/-6/…./0.0/324/44           23 SSW AERO 17 SSW RMY 23
04/06 64/32/48/+5/…./0.0/516/69           24 NW  AERO 18 W   RMY 26
04/07 66/41/54/+11/0.00/0.0/306/41          24 S   AERO 18 S   RMY 25
04/08 48/34/41/-3/0.49/0.0/…/..           25 NE  AERO 20 NE  RMY 26
04/09 40/32/36/-8/0.08/0.0/…/..           23 NE  AERO 16 N   RMY 25
04/10 43/30/37/-8/T/T/T/..                  32 NW  AERO 26 NW  RMY 36
04/11 51/29/40/-5/0.00/0.0/…/..           23 NW  AERO 18 NW  RMY N/A
04/12 53/38/46/+1/…./0.0/…/..           35 SSW AERO 29 SSW RMY 39
04/13 71/54/63/+17/…./0.0/…/..          38 SSW AERO 32 SSW RMY N/A
04/14 71/51/61/+15/…./0.0/…/..          25 S   AERO 18 S   RMY N/A
04/15 67/40/54/+7/…./0.0/…/..           46 W   AERO 52 W   RMY 50
04/16 58/37/48/+1/0.00/0.0/…/..           46 W   AERO 44 W   RMY 44
04/17 62/36/49/+2/0.00/0.0/…/..           26 ESE AERO 25 S   RMY 28
04/18 63/39/51/+3/0.00/0.0/…/.. 44 S   AERO 44 S   RMY 50
04/19 71/58/65/+17/…/0.0/…/..           47 SSW AERO 51 SSW RMY 52
04/20 68/60/64/+15/…/0.0/…/..           50 SSW AERO 54 SSW RMY 52
04/21 68/51/60/+11/…/0.0/…/..           35 S   AERO 35 S   RMY N/A

04/22 Low temp since midnight is 50F; normal low is 40F

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

RECORDS FOR APRIL 22
HIGH 85 IN 1977, 2001
LOW 26 IN 1981
PRECIP 1.85 IN. IN 2000
SNOWFALL 3.0 IN. IN 1940
PEAK GUST 68e MPH NW IN 1945

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

TODAY’S REPORT PREPARED BY: Benjamin Turner

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Blue Hill Observatory & Science Center · Legal

Data Use & Privacy Policy

Please read the full Policy before accessing Observatory data · Effective January 1, 2025

Notice: By accessing, downloading, or using any Blue Hill Observatory data or services, you unconditionally accept and agree to be bound by this Policy in its entirety. If you do not agree, you may not access or use Observatory data.
Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
Part I — Data Use Policy
§ 01

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