Thursday, March 16, 2017

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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, MARCH 16, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME

BLUSTERY AND CHILLY CONDITIONS CONTINUE TODAY

Low pressure north of the region continues to give us
gusty winds and below normal temperatures.  Winds have
been out of the west with speeds up to 35 MPH.  Temps.
reached only 31F by 1:00PM, over 10F below the average
maximum value of 44F.  The overnight low of 17F is 9F
below average.

The lower dew points have helped to keep skies mostly
clear and visibility very clear today.  Just a few
cumulus and cirrus were observed at each observation,
and visibility remained at 70 miles.

Today’s Observations:

7 A.M.
Weather: Few cumulus and few cirrus in all directions
Temperature: 19F; Dew Point: 11F; Wind: W at 14G19 kts
Sea-level pressure: 29.77 ins. Hg, rising, then more quickly
Visibility: 70 miles
6-hr Max temp: 19F
6-hr Min temp: 17F
24-hr precip: 0.00 in.
24-hr snowfall: 0.0 in.
BHO SA 1155 CLR 70 080/19/11/2614G19/977/ FEW CU ALQDS FEW CI ALQDS/
8/101 4/006 53018 10019 20017

10 A.M.
Weather: Few cumulus in all directions, few cirrus SW-NNW
Temperature: 25F; Dew Point: 5F; Wind: W at 16G27 kts,
Peak Wind: 27 kts (31 MPH) W at 9:53AM EST
Sea-level pressure: 29.78 ins. Hg, rising unsteadily
Visibility: 70 miles
BHO SA 1455 CLR 70 084/25/05/2716G27/978/ FEW CU ALQDS FEW CI SW-NNW
PK WND 2727/53/ 8/101 51004

1 P.M.
Weather: Few cumulus in all directions, few cirrus SW-NE
Temperature: 30F; Dew Point: 11F; Wind: W at 16G25 kts,
Peak Wind: 30 kts (35 MPH) WNW at 12:08 PM EST
Sea-level pressure: 29.78 ins. Hg, rising then falling
Visibility: 70 miles
6-hr Max temp: 31F
6-hr Min temp: 19F
BHO SA 1755 CLR 70 084/30/11/2816G25/978/ FEW CU ALQDS FEW CI SW-NE
PK WND 2930/08/ 8/101 4/006 58000 10031 20019

SUMMARY FOR WEDNESDAY, MARCH 15, 2017

TEMPERATURE (DEGREES F)
MAX…..27   NORMAL…..44
MIN…..15   NORMAL…..26
MEAN….21   NORMAL…..35

DEPARTURE FROM 30-YEAR NORMAL……………………-14
TOTAL DEPARTURE FOR THE MONTH……………………-55 [-3.9 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..44   DEPARTURE………-14
TOTAL HEATING UNITS FOR THE MONTH………….536   DEPARTURE………+55
TOTAL HEATING UNITS FOR THE SEASON………..4413   DEPARTURE……..-636
TOTAL HEATING UNITS LAST SEASON TO DATE……4042   DIFFERENCE…….+371

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….36 W   AT  1:22 A.M.
AERO……………………37 W   AT  1:16 A.M.
ASOS……………………37 W   AT  1:21 A.M.
DAVIS…………………..35 WNW AT  1:21 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY…………………36 W   AT  1:21 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………26 W   AT  5:23 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..27 W   AT  1:21 A.M.
AVERAGE WIND SPEED AND DIRECTION………….18.8 W
ASOS………………….18.2
DAVIS…………………17.3 WNW [290 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.18
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….2.51  DEPARTURE……-0.08
ASOS…………..2.72
TOTAL PRECIPITATION FOR THE YEAR……….11.79  DEPARTURE……+0.78
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……….0.0  DEPARTURE…….-0.4
TOTAL SNOWFALL FOR THE MONTH……………10.3  DEPARTURE…….+3.0
TOTAL SNOWFALL FOR THE SEASON…………..62.6  DEPARTURE…….+8.3

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 35/20/28/-5/0.27/2.9/…/..           35 WNW AERO 44 WNW RMY 40
3/11 20/7/14/-20/0.02/0.2/…/..           43 W   AERO 47 W   RMY 50
3/12 25/4/15/-19/0.00/0.0/…/..           32 W   AERO 40 WNW RMY N/A
3/13 33/8/21/-13/0.00/0.0/…/..           25 WNW AERO 29 WNW RMY N/A
3/14 38/23/31/-4/34/…/../…/..          60 NE  AERO 62 NE  RMY 62
3/15 27/15/21/-14/0.00/0.0/…/..          36 W   AERO 37 W   RMY N/A

3/16  Low temp since midnight is 17F; normal low is now 26F

DAILY RECORDS FOR MARCH 2017

3/11/17: DAILY RECORD LOW MAXIMUM TEMPERATURE OF 20F,
TIES PREVIOUS RECORD SET IN 1885

3/14/17: DAILY RECORD MAXIMUM SNOWFALL OF 7.2 INS,
BREAKS PREVIOUS RECORD OF 6.7 INS SET IN 1958

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

RECORDS FOR MARCH 16
HIGH 73 IN 1990
LOW 8 IN 1932
PRE 1.95 INS. IN 1900
SNOW 10.0 INS. IN 1896
WIND 79 MPH NE IN 1956

RECORDS FOR MARCH 17
HIGH 69 IN 2003
LOW 6 IN 1885
PRECIP 1.97 INS. IN 1968
SNOWFALL 6.5 INS. IN 1956
PEAK GUST 70 MPH SSW IN 1973

TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle