Thursday, March 5, 2015

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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, MARCH 5, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME

ANOTHER ROUND OF LIGHT SNOW BLANKETS THE SUMMIT,
BRINGING 0.2 INCHES BY 10:00 AM EST….SNOWIEST WINTER
ON RECORD 1.0 INCH AWAY

Light snow began once again this morning, approximately
at 5:56 AM EST, and continued up to 9:00 AM EST, totaling
0.2 inches. Temperatures have tumbled since midnight as
well, with a midnight reading of 36F, which will likely
be our maximum for today.

Seasonal snowfall has now reached 143.4 inches, just
1.0 inch below the snowiest season on record set
in 1995-1996. Statistics and records are still being
finalized for the month of February below. For more
information about this historic winter, visit our
web site at BlueHill.org.

PRELIMINARY STATS FOR FEBRUARY 2015

TEMPERATURE, Deg. F
Avg. Max. 25.6 [-11.2] Avg. Min.  6.8 [-12.3] Mean     16.2 [-11.7] Corrected mean: 17.0
Max. for month: 39 on 2/22
Min. for month: -8 on 2/16
Number of days with temperature at or below zero: 6

HEATING DEGREE DAYS
Total heating units;   1360 [+323] Total for the season:  4708 [+140] Total for last season: 4591

PRECIPITATION, Inches
Total: 6.17 [+2.10]

SNOWFALL, Inches
Total: 83.6 [+69.7]

WIND, mph
Avg. uncorrected wind speed: 13.2
Avg. corrected wind speed: 13.5
Prevailing wind direction: NW @ 17%
Peak gust and direction: 53 NW on the 15th

SUNSHINE:
Astronomical total minutes:   7695/17769 or 43%
Campbell-Stokes card minutes: 7440/17148 or 43%

BHO Coldest Months, deg F (1885-2014)

1) 13.5 in Feb, 1934
2) 15.5 in Jan, 1920
3) 16.3 in Jan, 1888
4) 16.4 in Feb, 1885
5) 17.0 in Feb, 2015
6) 17.1 in Feb, 1923
7) 17.2 in Jan, 1912
17.2 in Jan, 1918
17.2 in Jan, 2004
10) 17.4 in Jan, 1893
17.4 in Dec, 1989

BHO Coldest February Maximum Temperature, deg F (1885-2015)

1) 37 in 1923
2) 39 in 1969
39 in 2015
4) 40 in 1978
5) 41 in 1905
41 in 1924
41 in 1934
8) 42 in 1958

BHO Greatest Snowstorms, inches (1885-2015):

1) 38.7 on 24-28 Feb, 1969
2) 30.8 on 26-28 Jan, 2015
3) 30.3 on 3-5 Mar, 1960
4) 30.1 on 6-7 Feb, 1978
5) 30.0 on 31 Mar – 1 Apr, 1997
6) 29.8 on 6-8 Mar, 2013
7) 27.7 on 7-10 Feb, 2015
8) 26.6 on 8-9 Feb, 2013
9) 24.7 on 17-18 Feb, 2003
10) 24.3 on 5-7 Dec, 2003
11) 23.0 on 5-7 Mar, 2001
12) 22.2 on 16-17 Feb, 1958
13) 21.6 on 14-15 Feb, 2015
14) 21.0 on 9-10 Feb, 1969

BHO Greatest February Snowstorms, inches (1885-2015):

1) 38.7 on 24-28 Feb, 1969
2) 30.1 on 6-7 Feb, 1978
3) 27.7 on 7-10 Feb, 2015
4) 26.6 on 8-9 Feb, 2013
5) 24.7 on 17-18 Feb, 2003
6) 22.2 on 16-17 Feb, 1958
7) 21.6 on 14-15 Feb, 2015
8) 21.0 on 9-10 Feb, 1969

BHO Snowiest February, inches (1885-2015):

1) 83.6 in 2015
2) 65.4 in 1969
3) 51.3 in 2003
4) 45.2 in 1967
5) 40.4 in 1920
6) 39.7 in 2013
7) 37.0 in 1893

BHO Snowiest January-February, inches (1886-2015):

1) 126.5 in 2015
2) 77.9 in 1948
3) 70.2 in 2005
4) 68.7 in 1904
5) 67.5 in 1920
6) 66.9 in 1994

BHO Greatest Snow Depth, inches (1895-2015):
1) 46 in February 2015
2) 43 in March 1969
3) 42 in January 1948
4) 41 in February 1969
5) 39 in February 1948
6) 38 in February 1920
7) 33 in February 1978
33 in January 1996
9) 31 in February 2003
31 in February 2011
11)30 in March 1960
30 in March 1978

Today’s Observations:

7 A.M.
Weather: Light snow, overcast nimbostratus
Temperature: 30F; Dew Point: 26F; Wind: NNW at 9 kts
Sea-level pressure: 29.98 ins. Hg, rising, then more slowly
Visibility: 1/2 of mile, obscured by light snow
6-hr Max temp: 35F
6-hr Min temp: 29F
24-hr precip: Trace
24-hr snowfall: Trace
Snow depth: 35 inches
BHO SA 1155 E18 OVC 1/2S- 154/30/26/3409/998/ NEW SNW PST 24 HRS TRACE/
8/6// 4/035 51029 MANUAL 6000/ 10035 20029

10 A.M.
Weather: Overcast altostratus
Temperature: 28F; Dew Point: 16F; Wind: WNW at 13G19 kts
Sea-level pressure: 30.05 ins. Hg, rising, then more slowly
Visibility: 25 miles, except 20 miles SE, 70 miles WNW-NNE,
obscured by showers
3-hr precip: 0.02 inches
3-hr snowfall: 0.2 inches
BHO SA 1455 E60 OVC 25 176/28/16/3013G19/005/ VSBY SE 20 MI WNW-NNE 70 MI
SHWRS DSNT ENE-W NEW SNW PST 3 HRS 0.2 INS/ 8/02/ 51022 ASOS 60001
MANUAL 60002

1 P.M.
Weather: Overcast altostratus, few stratocumulus
distant offshore NNE-ENE
Temperature: 27F; Dew Point: 11F; Wind NNW at 10G17 kts
Sea-Level Pressure: 30.08 ins. Hg, rising, then more quickly
Visibility: 15 miles, except 70 miles W-NNE, obscured by snow showers
6-hr Max temp: 30F
6-hr Min temp: 26F
3-hr precip: Trace
3-hr snowfall: Trace
BHO SA 1755 E70 OVC 15 187/27/11/3310G17/008/ SHWRS DSNT ENE-WSW VSBY
W-NNE 70 MI FEW SC DSNT OFFSHR NNE-ENE NEW SNW PST 3 HRS TRACE/ 8/52/
53011 ASOS 60001 MANUAL 60002 10030 20026

SUMMARY FOR WEDNESDAY, MARCH 4, 2015

TEMPERATURE (DEGREES F)
MAX…..41   NORMAL…..41
MIN…..32   NORMAL…..23
MEAN….37   NORMAL…..32

DEPARTURE FROM 30-YEAR NORMAL……………………….+5
TOTAL DEPARTURE FOR THE MONTH………………………-15 [-4.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..28  DEPARTURE………..-5
TOTAL HEATING UNITS FOR THE MONTH………….149  DEPARTURE……….+20
TOTAL HEATING UNITS FOR THE SEASON………..4857  DEPARTURE………+155
TOTAL HEATING UNITS LAST SEASON TO DATE……4702  DIFFERENCE……..+100

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………33 S     AT  3:08 A.M.*
ASOS…………………..36 SW    AT  3:08 A.M.
DAVIS………………….35 N     AT 12:51 A.M. RMY 36
FASTEST MILE FOR YESTERDAY………………..27 S     AT 12:51 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..28 S     AT 12:51 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….26 S     AT 12:51 A.M.
AVERAGE WIND SPEED AND DIRECTION…………14.5 WSW
ASOS…………………14.0
DAVIS………………..13.0 WSW [242 degrees] * last of several occurrences..

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…TRACE  DEPARTURE…..-0.17
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.62  DEPARTURE…..-0.07
ASOS…………..0.65
TOTAL PRECIPITATION FOR THE YEAR……….11.97  DEPARTURE…..+2.98
ASOS……………N/A ***
*** ASOS annual totals not available due to erroneous readings

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……..TRACE  DEPARTURE……-0.6
TOTAL SNOWFALL FOR THE MONTH…………….5.7  DEPARTURE……+3.6
TOTAL SNOWFALL FOR THE SEASON………….143.2  DEPARTURE…..+94.1

PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOWFALL/SUN(MIN.)/SUN(%)/ PEAK GUST/RMY 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

2/1  28/8/18/-8/0.00/0.0/582/97               29 WNW RMY N/A
2/2  29/8/19/-7/1.53/16.5/000/00              44 NE  RMY 46
2/3  21/0/11/-15/0.00/0.0/593/98              31 NW  RMY N/A
2/4  36/14/25/-1/0.00/0.0/164/27              31 S   RMY 33
2/5  34/4/19/-7/0.15/3.5/000/00               38 NW  RMY 39
2/6  19/-2/9/-17/0.00/0.0/392/64              28 NW  RMY 27
2/7  25/14/20/-7/…./…/000/00              25 WSW RMY N/A
2/8  29/11/20/-7/…./…/000/00              30 NNE RMY 29
2/9  19/12/16/-11/…./…/000/00             29 N   RMY 28
2/10 28/12/20/-7/…./…/081/13              29 N   RMY 29
2/11 24/15/20/-7/0.03/1.4/000/00              30 N   RMY 29
2/12 28/14/21/-6/0.02/0.6/000/00              31 NW  RMY N/A
2/13 20/2/11/-17/0.00/0.0/630/100             35 NW  RMY 35
2/14 26/1/14/-14/…./…/241/38              24 NW  RMY N/A
2/15 18/-6/6/-22/…./…/000/00              53 NW  RMY 59
2/16 17/-8/5/-23/0.00/0.0/606/95              43 NW  RMY N/A
2/17 21/5/13/-15/0.12/2.0/064/10              18 NW  RMY 16
2/18 28/15/22/-7/…./…/039/06              17 W   RMY N/A
2/19 26/6/16/-13/0.02/0.3/116/18              40 W   RMY 43
2/20 15/0/8/-21/0.00/0.0/630/97               38 W   RMY 40
2/21 32/3/18/-11/…./…/462/71              39 SSW RMY 42
2/22 39/27/33/+4/…./…/327/50              25 WSW RMY N/A
2/23 28/1/15/-15/0.00/0.0/204/31              38 WNW RMY 44
2/24 18/-6/6/-24/…./…/574/87              26 S   RMY 27
2/25 32/11/22/-8/…./…/650/98              35 W   RMY 36
2/26 21/15/18/-12/0.04/0.6/000/00             25 NE  RMY 24
2/27 25/9/17/-14/0.00/0.0/669/100             20 NW  RMY N/A
2/28 30/5/18/-13/0.00/0.0/671/100             22 NW  RMY N/A

3/1  29/14/22/-9/…./…/…/..              25 SSW RMY 25
3/2  35/22/29/-2/…./…/…/..              44 WNW RMY 48
3/3  32/13/23/-9/…./2.8/…/..              33 S   RMY N/A
3/4  41/32/37/+5/…./…/000/00              33 SW  RMY 36

3/5 morning low temp: 29F since midnight, normal low is now 23

DAILY RECORDS FOR FEBRUARY 2015

– NEW DAILY RECORD SNOWFALL FOR 2 FEBRUARY 2015
SNOWFALL 16.5 INS. surpasses previous record:
5.5 ins. in 1916, 1934

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

RECORDS FOR MARCH 5
HIGH 64 IN 1979
LOW -2 IN 1948
PRECIP 1.76 INS. IN 2001
SNOWFALL 13.0 INS. IN 1891
PEAK GUST 76e MPH WNW IN 1971

RECORDS FOR MARCH 6
HIGH 66 IN 1894
LOW 3 IN 1948, 2007
PRECIP 1.85 INS. IN 2001
SNOWFALL 15.5 INS. IN 2001
PEAK GUST 82 MPH S IN 1959

TODAY’S REPORT PREPARED BY: Brian Fitzgerald