Monday, February 4, 2019

| February 4, 2019 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, FEBRUARY 4, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

A SPRINGLIKE, WELL-ABOVE SEASONABLE DAY WITH
A LIGHT BREEZE FROM THE SOUTHWEST….

We observed fair weather today with decreasing upper-level
clouds throughout. Visibility remained at 40 miles despite
low humidity, due to a distant haze. Humidity dropped from
85% this morning to 43% this afternoon. Wind from the
southwest and an almost clear sky have led the way to
warmer than average temperatures. The high so far today
is 58F, 23 degrees above the normal daily maximum temperature
of 35F. The low since midnight is 33F, 16 degrees above the
normal minimum of 17F.

Today’s Observations:

7 A.M.
Weather: Broken cirrocumulus
Temperature: 35F; Dew Point: 31F; Wind: SW at 10G16 kts
Sea-level pressure: 30.05 ins. Hg, rising steadily
Visibility: 40 miles, distant haze in all directions
6-hr Max temp: 35F
6-hr Min temp: 33F
24-hr Precip: 0.00 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1155 E250 BKN 40 176/35/31/2410G16/005/ FEW CU
DSNT HZ ALQDS/ 8/109 51007 10035 20033

10 A.M.
Weather: Broken cirrus
Temperature: 46F; Dew Point: 33F; Wind: SW at 11G16 kts
Sea-level pressure: 30.08 ins. Hg, rising steadily
Visibility: 40 miles, smoke layer along horizon
3-hr Precip: 0.00 ins.
BHO SA 1455 E250 BKN 40 185/46/33/2211G16/008/ K LYR ALG
HRZN/ 8/002 51009

1 P.M.
Weather: Scattered cirrus
Temperature: 58F; Dew Point: 36F; Wind: SSW at 8G12 kts
Sea-level pressure: 30.04 ins. Hg, falling steadily
Visibility: 40 miles, distant haze in all directions
6-hr Max temp: 58F
6-hr Min temp: 34F
6-hr Precip:  0.00 ins.
6-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1755 E250 SCT 40 173/58/36/2008G12/004/ DSNT HZ ALQDS/
8/002 58012 10058 20034

SUMMARY FOR SUNDAY, FEBRUARY 3, 2019

TEMPERATURE (DEGREES F)
MAX…..38   NORMAL…..35
MIN…..27   NORMAL…..17
MEAN….33   NORMAL…..26

DEPARTURE FROM 30-YEAR NORMAL……………………+7
TOTAL DEPARTURE FOR THE MONTH…………………..-14 [-14.9 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..32   DEPARTURE………-7
TOTAL HEATING UNITS FOR THE MONTH………….131   DEPARTURE………14
TOTAL HEATING UNITS FOR THE SEASON………..3627   DEPARTURE……..-21
TOTAL HEATING UNITS LAST SEASON TO DATE……3444   DIFFERENCE……+183

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..26 S   AT  5:39 P.M.
AERO…………………….25 S   AT  5:43 P.M.
ASOS…………………….27 S   AT  5:40 P.M.
DAVIS……………………25 S   AT  5:23 P.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………….20 S   AT  5:44 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….21 S   AT  5:40 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………19 S   AT  5:24 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..8.6 S
ASOS…………………..8.8
DAVIS………………….8.6 S [252 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE…….-0.13
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.00  DEPARTURE…….-0.40
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE YEAR………..5.35  DEPARTURE…….+0.60
ASOS…………..5.48

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE……..-0.5
TOTAL SNOWFALL FOR THE MONTH…………….0.0  DEPARTURE……..-1.5
TOTAL SNOWFALL FOR THE SEASON…………..12.4  DEPARTURE…….-22.2

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/…./0.0/386/72         53 W   AERO 53 W   RMY 54
01/02 34/24/29/+2/…./…/432/81          22 NW  AERO 22 NW  RMY N/A
01/03 42/28/35/+9/0.01/T/228/43            28 WNW AERO 30 WNW RMY 30
01/04 43/30/37/+11/…./…/354/66         29 SW  AERO 29 SW  RMY 29
01/05 41/32/37/+11/1.19/000/000/00         26 NE  AERO 25 NNW RMY 27
01/06 42/21/32/+6/0.00/0.0/300/56          42 NW  AERO 46 NW  RMY 50
01/07 26/14/20/-6/…/…/474/88 37 NW  AERO 41 NW  RMY N/A
01/08 40/24/32/+6/…/…/000/00           24 SSE AERO 23 SSE RMY N/A
01/09 42/31/37/+11/…/…/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/…/1.6/198/36           30 E   AERO 30 E   RMY N/A
01/20 33/3/18/-7/…/…/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/…./…/348/60          28 NW  AERO 28 NW  RMY N/A
01/29 32/19/26/+1/…./…/072/13          22 SE  AERO 21 E   RMY N/A
01/30 36/3/20/-6/…./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

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 38/27/33/+7/0.00/0.0/…/..          26 S   AERO 25 S   RMY 29

02/04 Low temp since midnight is 33F; normal low is 17F

*Official gust chart reading low

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

RECORDS FOR FEBRUARY 4
HIGH 63F IN 1991
LOW -4F IN 1886, 1908
PRECIP 1.80 INS. IN 1926
SNOWFALL 15.0 INS. IN 1961
PEAK GUST 89 MPH SSE IN 1972

RECORDS FOR FEBRUARY 5
HIGH 65F IN 1991
LOW -14F IN 1918
PRECIP 1.55 INS. IN 2001
SNOWFALL 16.0 INS. IN 1907
PEAK GUST 67 MPH WNW IN 1969

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

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