Saturday, April 13, 2019

| April 13, 2019 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, APRIL 13, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

MORNING CLOUDS AND FOG BREAK, LEAVING FOR A SUNNY,
WARM AFTERNOON….

0.53 inches of liquid precipitation fell between yesterday
afternoon and around 10 o’clock this morning. Foggy conditions
were experienced until slightly after 8 A.M. when
fog lifted and left for cloudy skies with good
visibility. As the day progressed, visibility became
more clear, and clouds have left the area, leaving
for a mostly sunny sky and 80 mile visibility by the
1 o’clock EST observation. Our high temperature so far
today has been 66F, which is 11 degrees warmer than
our normal maximum temperature for today of 55F. Our low
since midnight was 54F, which is 17 degrees warmer than
our average low of 37F. Wind has prevailed steadily from
the south-southwest, which has brought this warm air to our area.

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:  5404 [-80]
Total for last season: 5058

PRECIPITATION, Inches
Total: 4.08 [-1.50]
Greatest in 24 hrs: 1.82 ins. on the 3rd-4th

SNOWFALL, Inches
Total: 23.1 [+10.4]
Greatest in 24 hrs: 15.8 ins. on the 3rd-4th

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: Fog, light drizzle
Temperature: 56F; Dew Point: 56F; Wind: SSW at 15G20 kts
Sea-level pressure: 30.09 ins. Hg, falling then rising
Visibility: 1/8 mile, fog
6-hr Max temp: 57F
6-hr Min temp: 54F
24-hr Precip: 0.51
24-hr snowfall: 0.0
Snow depth: 0 ins.
BHO SA 1155 W3 X 1/8L-F 189/56/56/2015G20/009/ 8/// 53003 70051
10057 20054

10 A.M.
Weather: Overcast stratus
Temperature: 56F; Dew Point: 56F; Wind: SSW at 13 kts
Sea-level pressure: 30.07 ins. Hg, decreasing, then increasing
Visibility: 70 miles, distant haze in all directions
3-hr Precip: 0.02 ins.
BHO SA 1455 E40 OVC 70 182/56/56/2013/007/ DSNT HZ ALQDS/ 8/600 55007
6002/

1 P.M.
Weather: Scattered cirrus, few cumulus in all directions,
few altocumulus S-N
Temperature: 66F; Dew Point: 57F; Wind: SSW at 7 kts
Sea-level pressure: 30.02 ins. Hg, falling, then more quickly
Visibility: 80 miles
6-hr Max temp: 66F
6-hr Min temp: 56F
6-hr Precip:  0.02 ins.
6-hr snowfall: 0.0 ins.
BHO SA 1755 250 SCT 80 165/66/57/2007/002/ FEW CU ALQDS
FEW AC S-N/ 8/181 58017 6002/ 10066 20056

SUMMARY FOR FRIDAY, APRIL 12, 2019

TEMPERATURE (DEGREES F)
MAX…..53   NORMAL…..54
MIN…..38   NORMAL…..36
MEAN….46   NORMAL…..45

DEPARTURE FROM 30-YEAR NORMAL……………………+1
TOTAL DEPARTURE FOR THE MONTH…………………..-11 [-1.1 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..19   DEPARTURE………-1
TOTAL HEATING UNITS FOR THE MONTH………….274   DEPARTURE……..+12
TOTAL HEATING UNITS FOR THE SEASON………..5679   DEPARTURE……..-67
TOTAL HEATING UNITS LAST SEASON TO DATE……5377   DIFFERENCE……+302

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..35 SSW AT 11:26 P.M.
AERO…………………….29 SSW AT 11:10 P.M.
ASOS…………………….37 SSW AT 11:21 P.M.
DAVIS……………………27 S   AT 11:09 P.M.  RMY 39
FASTEST MILE FOR YESTERDAY………………….28 SSW AT 11:47 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….26 SSW AT 11:22 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………27 S   AT 11:09 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..12.8 S
ASOS…………………..13.2
DAVIS………………….12.9 S [175 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.51   DEPARTURE……+0.35
ASOS…………..0.52
TOTAL PRECIPITATION FOR THE MONTH……….1.74  DEPARTURE…….-0.30
ASOS…………..1.70
TOTAL PRECIPITATION FOR THE YEAR……….14.78  DEPARTURE…….-1.26
ASOS………….14.85

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……..-1.9
TOTAL SNOWFALL FOR THE SEASON………….47.6  DEPARTURE…….-14.0

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/…./0.0/…/..           29 S   AERO 25 S   RMY 31
04/03 62/35/49/+7/…./0.0/…/..           54 W   AERO 58 W   RMY 56
04/04 50/34/42/0/…./0.0/…/..            46 W   AERO 41 W   RMY N/A
04/05 47/27/37/-6/…./0.0/…/..           23 SSW AERO 17 SSW RMY 23
04/06 64/32/48/+5/…./0.0/…/..           24 NW  AERO 18 W   RMY 26
04/07 66/41/54/+11/0.00/0.0/…/..          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/…/..                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/…/…/…/..            35 SSW AERO 29 SSW RMY 39

04/12 Low temp since midnight is 54F; normal low is 37F

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

RECORDS FOR APRIL 13
HIGH 85 IN 1945
LOW 22 IN 1939
PRECIP 2.51 IN. IN 2004
SNOWFALL 6.8 IN. IN 1933
PEAK GUST 59 MPH SSW IN 1995

RECORDS FOR APRIL 14
HIGH 80 IN 1945
LOW 21 IN 1923
PRECIP 2.22 IN. IN 1895
SNOWFALL 8.4 IN. IN 1953
PEAK GUST 71e MPH W IN 1943

TODAY’S REPORT PREPARED BY: Samantha Richard

Category: Daily Discussions

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