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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, APRIL 24, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

FOGGY AND RAINY WITH CONDITIONS IMPROVING IN 
THE AFTERNOON....

Fog limited visibility to 1 mile this morning, but 
dissipated quickly following the 7 A.M. observation.
Light precipitation overnight was measured to be 0.07 
inches. Winds have become gradually stronger since this 
morning, with an average speed of 15 mph by noontime. 
The max gust so far today is 28 mph. The high so far 
today is 63F, 4 degrees above the daily normal of 59F. 
The low since midnight is 46F, 5 degrees above the 
normal minimum of 41F.   


Today's Observations:

7 A.M.
Weather: Partial obscuration due to fog
Temperature: 49F; Dew Point: 49F; Wind: W at 7 kts
Sea-level pressure: 29.68 ins. Hg, rising steadily
Visibility: 1 mile, fog
6-hr Max temp: 49F
6-hr Min temp: 46F
24-hr Precip: 0.07 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 0 ins. 
BHO SA 1155 –X 1F 051/49/49/2707/968/ 8//// 70007 
55002 10049 20046 

10 A.M.
Weather: Broken stratocumulus
Temperature: 55F; Dew Point: 51F; Wind: NW at 8 kts 
Sea-level pressure: 29.69 ins. Hg, rising steadily
Visibility: 75 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 E35 BKN 75 053/55/51/3108/969/ 8/800 
50002 

1 P.M.
Weather: Scattered cumulus
Temperature: 63F; Dew Point: 41F; Wind: WNW at 14G24 kts
Sea-level pressure: 29.70 ins. Hg, rising steadily
Visibility: 80 miles
6-hr Max temp: 63F
6-hr Min temp: 49F
6-hr Precip: 0.00 ins.
6-hr snowfall: 0.0 ins. 
BHO SA 1755 E50 SCT 80 055/63/41/3014G24/970/ 8/100 
53002 10063 20049

SUMMARY FOR TUESDAY, APRIL 23, 2019 

TEMPERATURE (DEGREES F)
MAX.....52   NORMAL.....59
MIN.....44   NORMAL.....41
MEAN....48   NORMAL.....50

DEPARTURE FROM 30-YEAR NORMAL........................-2
TOTAL DEPARTURE FOR THE MONTH.......................+75 [+3.1 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............17   DEPARTURE.........+2
TOTAL HEATING UNITS FOR THE MONTH.............382   DEPARTURE........-86
TOTAL HEATING UNITS FOR THE SEASON...........5787   DEPARTURE.......-165
TOTAL HEATING UNITS LAST SEASON TO DATE......5615   DIFFERENCE......+172

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................30 NNE AT  2:04 A.M.
                   AERO.........................26 NNE AT  2:02 A.M.
                   ASOS.........................30 NNE AT  2:05 A.M. 
                   DAVIS........................29 NE  AT  2:04 A.M.  RMY N/A
FASTEST MILE FOR YESTERDAY......................21 NNE AT  2:08 A.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...................20 NNE AT  2:40 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................20 NE  AT  2:39 A.M.
AVERAGE WIND SPEED AND DIRECTION..............10.0 NNE
                   ASOS........................9.9
                   DAVIS......................10.3 NE [56 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.07  DEPARTURE.......-2.83
                         ASOS..............0.09
TOTAL PRECIPITATION FOR THE MONTH..........6.43  DEPARTURE.......+2.81
                         ASOS..............6.33
TOTAL PRECIPITATION FOR THE YEAR..........19.47  DEPARTURE.......+1.85
                         ASOS.............19.48

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M.........0.0  DEPARTURE........-0.1
TOTAL SNOWFALL FOR THE MONTH.............TRACE  DEPARTURE........-2.8
TOTAL SNOWFALL FOR THE SEASON.............47.6  DEPARTURE.......-14.9


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 53/45/49/0/.../0.0/.../..             35 NNE AERO 32 NNE RMY 35
04/23 52/44/48/-2/.../0.0/.../..            30 NNE AERO 26 NNE RMY N/A

04/24 Low temp since midnight is 44F; normal low is 41F


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

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

RECORDS FOR APRIL 25
HIGH 83 IN 2009
LOW 24 IN 1892
PRECIP 1.38 IN. IN 1901
SNOWFALL 0.7 IN. IN 2002
PEAK GUST 66 MPH SE IN 1968

TODAY'S REPORT PREPARED BY: Benjamin Turner