Friday, March 10, 2017

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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, MARCH 10, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME

LIGHT SNOW AND WINDS

Snow was coming down lightly during today’s observations.
The total precip. at 7:00AM was 0.02 in. with an additional
0.11 in. falling by 1:00PM. The total snow fall at 7:00 AM
was 1.3 in. with an additional 1.0 in. falling by 1:00 PM.
Temperatures remained below normal with a high of 29F at
the 1:00 PM observation. Normal max for today is 42F. Temperatures
are dropping and should continue to drop overnight.

Winds died down around 2:00 AM and were very light and variable
today. The official gust from yesterday’s strong winds was 46 kts
(53 MPH).

Today’s Observations:

7 A.M.
Weather: Light snow and fog
Temperature: 28F; Dew Point: 28F; Wind: E at 5 kts
Sea-level pressure: 29.91 ins. Hg, rising then falling
Visibility: 3/4 mile
6-hr Max temp: 35F
6-hr Min temp: 28F
24-hr precip: 0.02 in.
24-hr snowfall: 1.3 in.
BHO SA 1155 W3 X 3/4S-F 130/28/28/1005/991/ NEW SNW PST
24 HRS 1.3 INS WND LGT/ 8//// 4/001 58005 MANUAL 70002
ASOS 70002 10035 20028

10 A.M.
Weather: Light snow and fog
Temperature: 29F; Dew Point: 26F; Wind: ENE at 5 kts,
Sea-level pressure: 29.86 ins. Hg, rising then falling
Visibility: 2 miles
3-hr precip: 0.05 in.
3-hr snowfall: 0.3 in.
BHO SA 1455 W3 X 2S-F 113/29/26/0705/986/ NEW SNW PST 3 HRS
0.3 INS WND LGT/ 8/02/ 4/002 58017 MANUAL 60004 ASOS 60005

1 P.M.
Weather: Light snow and fog
Temperature: 29F; Dew Point: 29F; Wind: NNE at 4 kts,
Sea-level pressure: 29.76 ins. Hg, falling steadily
Visibility: 3/4 mile
6-hr Max temp: 29F
6-hr Min temp: 28F
6-hr precip: .11 in.
6-hr snowfall: 1.0 in.
BHO SA 1755 W3 X 3/4S-F 079/29/29/0304/976/ NEW SNW PST
6 HRS 1 IN WND LGT/ 8//// 4/002 58034 MANUAL 60011 ASOS
60011 10029 20028

SUMMARY FOR THURSDAY, MARCH 9, 2017

TEMPERATURE (DEGREES F)
MAX…..49   NORMAL…..42
MIN…..35   NORMAL…..24
MEAN….42   NORMAL…..33

DEPARTURE FROM 30-YEAR NORMAL……………………+9
TOTAL DEPARTURE FOR THE MONTH……………………+20 [+2.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..23   DEPARTURE……….-9
TOTAL HEATING UNITS FOR THE MONTH………….276   DEPARTURE………-20
TOTAL HEATING UNITS FOR THE SEASON………..4153   DEPARTURE……..-711
TOTAL HEATING UNITS LAST SEASON TO DATE……3939   DIFFERENCE…….+214

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….53 W   AT 11:16 A.M.
AERO……………………59 W   AT 11:16 A.M.
ASOS……………………65 W   AT  9:22 A.M.
DAVIS…………………..56 WNW AT 10:13 A.M. RMY 58
FASTEST MILE FOR YESTERDAY…………………43 W   AT 11:15 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………43 W   AT 11:17 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..41 WNW AT 11:17 A.M.
AVERAGE WIND SPEED AND DIRECTION………….20.2 W
ASOS………………….18.8
DAVIS…………………18.4 WNW [295 deg.] *LAST OF MULTIPLE OCCURRENCES

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.02  DEPARTURE……-0.16
ASOS…………..0.02
TOTAL PRECIPITATION FOR THE MONTH……….0.09  DEPARTURE……-1.48
ASOS…………..0.11
TOTAL PRECIPITATION FOR THE YEAR………..9.37  DEPARTURE……-0.62
ASOS……………N/A ***
*** ASOS annual total not available due to erroneous readings

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….1.3  DEPARTURE…….+0.8
TOTAL SNOWFALL FOR THE MONTH…………….1.3  DEPARTURE…….-3.3
TOTAL SNOWFALL FOR THE SEASON…………..53.6  DEPARTURE…….+2.0

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

3/1  61/46/54/+23/0.01/0.0/…/..          41 S   AERO 45 S   RMY 45
3/2  55/26/41/+10/T/T/…/..               58 W   AERO 61 W   RMY 59
3/3  36/19/28/-4/T/T/…/..                38 W   AERO 44 W   RMY N/A
3/4  20/7/14/-18/T/T/…/..                45 NW  AERO 48 NW  RMY 51
3/5  29/5/17/-15/0.00/0.0/…/..           35 WNW AERO 43 WNW*RMY N/A
3/6  40/11/26/-6/0.00/0.0/…/..           18 WNW AERO 17 NW* RMY N/A
3/7  47/29/38/+5/0.01/0.0/…/..           32 S   AERO 35 S   RMY 36
3/8  55/43/49/+16/0.05/0.0/…/..          35 W   AERO 36 W   RMY 37
3/9  49/35/42/+9/0.0/0.0/…/..            53 W   AERO 59 W   RMY 58

3/10  Low temp since midnight is 28F; normal low is now 25F

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

RECORDS FOR MARCH 10
HIGH 69 IN 1977
LOW 2 IN 1984
PRECIP 2.00 INS. IN 1994
SNOWFALL 4.0 INS. IN 1997
PEAK GUST 80 MPH NW IN 1974

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

TODAY’S REPORT PREPARED BY: Kaitlin Geagan