Wednesday, March 11, 2015

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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, MARCH 11, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME

TEMPERATURE REACHES 55F BY 1:00 PM EST,
WARMEST SINCE CHRISTMAS DAY

Above average temperatures returned on Tuesday,
with sunshine through a thin veil of cirrostratus. A
maximum of 52F was record on either side of the 1:00 PM
EST observation, the warmest reading since December 25th
when a maximum of 61F was recorded.

Light rain entered the region last night, wrapping up
before sunrise and bringing 0.11 inches of new rain. Rain,
coupled with an overnight low of 39F and fog, brought
down the snow pack on the summit from 31 inches yesterday
morning, to 27 inches by 7:00 AM today.

By the 1:00 PM EST observation a maximum reading of 55F
had been recorded, under broken high cirrus. Hazy conditions
were also present with visibility limited to just 35 miles.

Seasonal snowfall has now reached 143.4 inches, just
1.0 inch below the snowiest season on record set
in 1995-1996. For more information about this historic
winter, visit our web site at bluehill.org.

The average snow depth has fallen to 31 inches as of this
morning. This is the 36th consecutive day with 20 inches
or more of snow on the ground which is firmly in second
place all time.  The record is 53 days set back in 1948.

BHO Greatest Seasonal Snowfall, inches (1885-2015):

1) 144.4 in 1995-1996
2) 143.4 in 2014-2015 (through 1 PM March 11th)
3) 136.0 in 1947-1948
4) 119.4 in 2004-2005
5) 113.1 in 2002-2003
6) 111.5 in 1915-1916
7) 109.6 in 1966-1967
8) 106.8 in 1955-1956
9) 103.4 in 1903-1904
10) 102.5 in 1922-1923

BHO Longest Duration of 20″+ Snow Depth, (1885-2015):

1) 53 days, 27 Dec, 1947 – 17 Feb, 1948
2) 37 days, 3 Feb – 11 Mar, 2015 (through 1 PM March 11th)
3) 34 days, 5 Feb – 9 Mar, 1920
34 days, 7 Feb – 12 Mar, 1978
5) 23 days, 25 Feb – 19 Mar, 1969
6) 21 days, 27 Jan – 16 Feb, 2011
7) 11 days, 15-25 Mar, 1916
11 days, 5-15 Jan, 1961
Today’s Observations:

7 A.M.
Weather: Broken cirrus fibratus, intermittent fog
Temperature: 40F; Dew Point: 40F; Wind: W at 15 kts
Sea-level pressure: 29.83 ins. Hg, rising slightly
Visibility: 1/2 of a mile varying to 15 miles, obscured
by intermittent fog
6-hr Max temp: 40F
6-hr Min temp: 39F
24-hr snowfall: None
24-hr precip: 0.11 inches
Snow depth: 27 inches
BHO SA 1155 -X E200 BKN 1/2F 100/40/40/2615/983/
VSBY 1/2V15 MI FG INTMT/ 8/601 4/027 51001
ASOS 60001 70012 MANUAL 70011 10040 20039

10 A.M.
Weather: Scattered cirrus fibratus, few cirrostratus
distant ESE-W
Temperature: 48F; Dew Point: 40F; Wind: W at 13 kts
Sea-level pressure: 29.83 ins. Hg, rising, then falling
Visibility: 35 miles, hazy
BHO SA 1455 250 SCT 35 102/48/40/2613/983/
FEW CS DSNT ESE-W HAZY/ 8/001 50002

1 P.M.
Weather: Broken cirrus
Temperature: 54F; Dew Point: 30F; W at 16G26 kts
Peak Wind: 32 knots W @ 12:29 PM EST
Sea-Level Pressure: 29.82 ins. Hg, falling, then rising
Visibility: 35 miles, hazy
6-hr Max temp: 55F
6-hr Min temp: 40F
BHO SA 1755 E250 BKN 35 099/54/30/2816G26/982/
HAZY PK WND 2932/29/ 8/001 55003 10055 20040
SUMMARY FOR TUESDAY, MARCH 10, 2015

TEMPERATURE (DEGREES F)
MAX…..52   NORMAL…..42
MIN…..32   NORMAL…..25
MEAN….42   NORMAL…..33

DEPARTURE FROM 30-YEAR NORMAL……………………….+9
TOTAL DEPARTURE FOR THE MONTH………………………-31 [-3.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..23  DEPARTURE………..-9
TOTAL HEATING UNITS FOR THE MONTH………….359  DEPARTURE……….+31
TOTAL HEATING UNITS FOR THE SEASON………..5067  DEPARTURE………+172
TOTAL HEATING UNITS LAST SEASON TO DATE……4975  DIFFERENCE………+92

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………28 S   AT  3:01 P.M.
ASOS…………………..27 S   AT  3:01 P.M.
DAVIS………………….26 S   AT  2:24 P.M. RMY 27
FASTEST MILE FOR YESTERDAY………………..21 S   AT  5:45 P.M.*
MAXIMUM 2-MINUTE ASOS AVERAGE……………..21 S   AT  8:45 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….20 S   AT  5:44 P.M.
AVERAGE WIND SPEED AND DIRECTION…………13.1 S
ASOS…………………13.4
DAVIS………………..12.0 SW [215 degrees] * last of several occurrences..

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.11  DEPARTURE…..-0.07
ASOS…………..0.12
TOTAL PRECIPITATION FOR THE MONTH……….0.75  DEPARTURE…..-1.00
ASOS…………..0.78
TOTAL PRECIPITATION FOR THE YEAR……….12.09  DEPARTURE…..+2.05
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……….0.0  DEPARTURE……-0.5
TOTAL SNOWFALL FOR THE MONTH…………….5.9  DEPARTURE……+0.8
TOTAL SNOWFALL FOR THE SEASON………….143.4  DEPARTURE…..+91.3

PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY/MARCH 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/-7/0.08/1.1/000/00              25 WSW RMY N/A
2/8  29/11/20/-7/0.78/12.2/000/00             30 NNE RMY 29
2/9  19/12/16/-11/1.59/13.6/000/00            29 N   RMY 28
2/10 28/12/20/-7/0.10/0.8/081/13              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/-14/0.36/7.2/241/38              24 NW  RMY N/A
2/15 18/-6/6/-22/0.81/14.4/000/00             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/-7/0.01/0.4/039/06              17 W   RMY N/A
2/19 26/6/16/-13/0.10/3.7/116/18              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  36/16/26/-6/0.02/0.2/000/00              28 NW  RMY 29
3/6  26/5/16/-16/0.00/0.0/…/..              28 NW  RMY 25
3/7  38/13/26/-7/0.00/0.0/…/..              30 WSW RMY 30
3/8  41/25/33/0/T/T/…/..                    38 WNW RMY 41
3/9  45/28/37/+4/0.00/0.0/…/..              40 W   RMY 39
3/10 52/32/42/+9/…./0.0/…/..              28 S   RMY 27

3/11 morning low temp: 39F since midnight, normal low is now 25F

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

– NEW DAILY RECORD SNOWFALL FOR 9 FEBRUARY 2015
SNOWFALL 13.6 INS. surpasses previous record:
13.0 ins. in 1969

– NEW DAILY RECORD SNOWFALL FOR 15 FEBRUARY 2015
SNOWFALL 14.4 INS. surpasses previous record:
11.2 ins. in 1940

DAILY RECORDS FOR MARCH 2015

-NONE SO FAR

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

RECORDS FOR MARCH 11
HIGH 65 IN 1967
LOW 4 IN 1939, 1960
PRECIP 2.11 INS. IN 1901
SNOWFALL 6.3 INS. IN 1934
PEAK GUST 66e MPH W IN 1980

RECORDS FOR MARCH 12
HIGH 72 IN 2012
LOW 2 IN 1885
PRECIP 2.87 INS. IN 1888
SNOWFALL 9.7 INS. IN 1959
PEAK GUST 66 MPH SE IN 1962

TODAY’S REPORT PREPARED BY: Brian Fitzgerald