Thursday, February 7, 2019

| February 7, 2019 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, FEBRUARY 7, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

OVERCAST AND DRIZZLY WITH SOME ICE GLAZE
OCCURRING OVERNIGHT….

Mixed precipitation overnight left a thin layer of
ice glaze, with 0.64 inches of liquid measured at
7 A.M. We observed overcast, foggy and drizzly
conditions today, and measured another 0.02 inches
at 1 P.M. Visibility increased from a 1/16 mile to
a 1/2 mile in the afternoon. An easterly breeze
persisted throughout the day, blowing at an average
of 15 mph and gusting at or above 20 mph. The high
so far today is 37F, 2 degrees above the normal of
35F. The low since midnight is 31F, 13 degrees above
the normal minimum of 18F.
PRELIMINARY STATS FOR JANUARY 2019

TEMPERATURE, Deg. F
Avg. Max. 34.3 [+0.5]
Avg. Min. 17.9 [+0.8]
Mean      26.1 [+0.6]
24-hour corrected mean: 26.6
Max. for month: 57F on  24th
Min. for month: 32F on  5th

HEATING DEGREE DAYS
Total heating units:   1200 [-26]
Total for the season:  3496 [-35]
Total for last season: 3321

PRECIPITATION, Inches
Total: 5.35 [-0.18]
Greatest in 24 hrs: 2 inches on the 19th-20th

SNOWFALL, Inches
Total: 4.7 [-12.4]
Greatest in 24 hrs: 4.2 inches on the 19th-20th

WIND, mph
Avg. uncorrected wind speed: 13.4
Avg. corrected wind speed: 13.7
Prevailing wind direction: NW at 19%
Peak gust and direction: 77 S on 24th

SUNSHINE:
Campbell-Stokes card minutes: 8988 minutes of possible 17130 or 52%
Astronomical total minutes:   9273 minutes of possible 17650 or 53%

Today’s Observations:

7 A.M.
Weather: Light drizzle and dense fog
Temperature: 32F; Dew Point: 32F; Wind: E at 10 kts
Sea-level pressure: 30.14 ins. Hg, falling then rising
Visibility: 1/16 mile
6-hr Max temp: 32F
6-hr Min temp: 31F
24-hr Precip: 0.64 ins.
24-hr snowfall: Trace
Snow depth: 0 ins.
BHO SA 1155 W3 X 1/16L-F 206/32/32/0810/014/ L-CTD/
8//// 70064 55001 10032 20031

10 A.M.
Weather: Light drizzle and dense fog
Temperature: 35F; Dew Point: 35F; Wind: E at 13G19 kts
Sea-level pressure: 30.13 ins. Hg, falling steadily
Visibility: 1/16 mile, fog
3-hr Precip: 0.01 ins.
BHO SA 1455 W3 X 1/16L-F 202/35/35/0813G19/013/ L-CTD
PCPN VRY LGT/ 8//// 6001/ 58004

1 P.M.
Weather: Light drizzle and fog
Temperature: 36F; Dew Point: 36F; Wind: NE at 14G20 kts
Sea-level pressure: 30.16 ins. Hg, falling then rising
Visibility: 1/2 mile, fog
6-hr Max temp: 37F
6-hr Min temp: 32F
6-hr Precip:  0.02 ins.
6-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1755 W3 X 1/2L-F 214/36/36/0614G20/016/ L-CTD
PCPN VRY LGT/ 8//// 6002/ 50012 10037 20032

SUMMARY FOR WEDNESDAY, FEBRUARY 6, 2019

TEMPERATURE (DEGREES F)
MAX…..39   NORMAL…..35
MIN…..28   NORMAL…..18
MEAN….34   NORMAL…..26

DEPARTURE FROM 30-YEAR NORMAL……………………+8
TOTAL DEPARTURE FOR THE MONTH…………………..+39 [+6.3 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..31   DEPARTURE………-8
TOTAL HEATING UNITS FOR THE MONTH………….195   DEPARTURE……..-39
TOTAL HEATING UNITS FOR THE SEASON………..3691   DEPARTURE……..-74
TOTAL HEATING UNITS LAST SEASON TO DATE……3548   DIFFERENCE……+143

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..24 NNW AT 12:23 A.M.
AERO…………………….23 NNW AT 12:03 A.M.
ASOS…………………….25 NW  AT 12:24 A.M.
DAVIS……………………24 NW  AT 12:04 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………….20 NNW AT 12:08 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….20 NW  AT 12:08 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………20 NW  AT 12:08 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..9.3 N
ASOS…………………..9.4
DAVIS………………….9.2 W [261 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.64  DEPARTURE…….+0.51
ASOS…………..0.60
TOTAL PRECIPITATION FOR THE MONTH……….0.64  DEPARTURE…….-0.17
ASOS…………..0.60
TOTAL PRECIPITATION FOR THE YEAR………..5.99  DEPARTURE…….+0.83
ASOS…………..6.08

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………T  DEPARTURE……..-0.5
TOTAL SNOWFALL FOR THE MONTH………………T  DEPARTURE……..-3.0
TOTAL SNOWFALL FOR THE SEASON…………..12.4  DEPARTURE…….-23.7

PRELIMINARY CLIMATE SUMMARY FOR JANUARY 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

01/01 54/29/42/+15/0.37/0.0/386/72         53 W   AERO 53 W   RMY 54
01/02 34/24/29/+2/0.00/T/432/81            22 NW  AERO 22 NW  RMY N/A
01/03 42/28/35/+9/0.01/0.0/228/43          28 WNW AERO 30 WNW RMY 30
01/04 43/30/37/+11/0.00/0.0/354/66         29 SW  AERO 29 SW  RMY 29
01/05 41/32/37/+11/1.15/T/000/00           26 NE  AERO 25 NNW RMY 27
01/06 42/21/32/+6/0.00/T/300/56            42 NW  AERO 46 NW  RMY 50
01/07 26/14/20/-6/0.00/0.0/474/88 37 NW  AERO 41 NW  RMY N/A
01/08 40/24/32/+6/0.02/T/000/00            24 SSE AERO 23 SSE RMY N/A
01/09 42/31/37/+11/0.11/0.0/084/16         44 W   AERO 46 WNW RMY 45
01/10 32/20/26/+1/T/T/090/17               37 NW  AERO 41 NW  RMY 43
01/11 26/12/19/-6/0.00/0.0/366/68          36 WNW AERO 37 WNW RMY 38
01/12 26/9/18/-7/0.00/0.0/486/89           32 NW  AERO 32 NW  RMY 29
01/13 25/11/18/-7/0.00/0.0/456/84          18 NNW AERO 16 NW  RMY N/A
01/14 27/20/24/-1/0.00/0.0/120/22          20 NNE AERO 17 N   RMY N/A
01/15 34/18/26/1/0.00/0.0/402/73 22 NW  AERO 21 NNW RMY N/A
01/16 34/23/29/+4/0.00/0.0/270/47          33 W   AERO 32 W   RMY 35
01/17 27/13/20/-5/0.00/0.0/480/87          30 NNW AERO 28 NW  RMY N/A
01/18 40/21/31/+6/0.00/0.0/156/28          18 WNW AERO 18 WNW RMY N/A
01/19 31/24/28/+3/0.23/1.6/198/36          30 E   AERO 30 E   RMY N/A
01/20 33/3/18/-7/1.77/2.6/000/00           39 ENE AERO 43 ENE RMY 39
01/21 3/-2/1/-24/0.00/0.0/348/62           32*WNW AERO 41 WNW RMY M
01/22 24/0/12/-13/0.00/0.0/522/93          28 NW  AERO 30 NW  RMY 29
01/23 46/15/31/+6/0.00/0.0/000/00          37 SSW AERO 39 SSW RMY N/A
01/24 57/31/44/+19/1.44/0.0/000/00         77 S   AERO 79 S   RMY N/A
01/25 37/23/30/+5/0.00/0.0/378/66          41 WNW AERO 46 WNW RMY N/A
01/26 33/17/25/0/0.00/0.0/534/94           25 W   AERO 25 W   RMY 27
01/27 44/24/34/+9/0.00/0.0/480/84          39 S   AERO 39 S   RMY 41
01/28 30/19/28/+3/0.00/0.0/348/60          28 NW  AERO 28 NW  RMY N/A
01/29 32/19/26/+1/0.06/T/072/13            22 SE  AERO 21 E   RMY N/A
01/30 36/3/20/-6/0.19/0.5/504/88           52 W   AERO 53 W   RMY 57
01/31 14/-2/6/-20/0.00/0.0/570/99          33 WNW AERO 35 WNW RMY N/A

*Official gust chart reading low on 1/21/2019

PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY 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

02/01 19/5/12/-14/0.00/0.0/…/..          29 W   AERO 28 W   RMY N/A
02/02 30/7/19/-7/0.00/0.0/…/..           32 WSW AERO 32 WSW RMY 31
02/03 38/27/26/+7/0.00/0.0/…/..          26 S   AERO 25 S   RMY N/A
02/04 59/33/46/+20/0.00/0.0/…/..         25 SSW AERO 28 SSW RMY N/A
02/05 62/39/51/+25/0.00/0.0/…/..         30 WNW AERO 29 WNW RMY 32
02/06 39/28/34/+8/…./…/…/..          24 NNW AERO 23 NNW RMY N/A

02/07 Low temp since midnight is 31F; normal low is 18F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):

RECORDS FOR FEBRUARY 7
HIGH 51F IN 1951,1953
LOW -8F IN 1910
PRECIP 2.12 INS. IN 1983
SNOWFALL 17.1 INS. IN 1978 [BLIZZARD OF 1978]
PEAK GUST 87e MPH SSE IN 1951

RECORDS FOR FEBRUARY 8
HIGH 60F IN 1933
LOW -9F IN 1934
PRECIP 2.50 INS. IN 1945
SNOWFALL 16.1 INS. IN 2013
PEAK GUST 63e MPH NE IN 1945, 2013

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

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