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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, MARCH 23, 2017  
ALL TIMES ARE IN EASTERN STANDARD TIME

DRY CONDITIONS AND BELOW NORMAL TEMPERATURES CONTINUE 

High pressure has brought dry air and cold temperatures to Great
Blue Hill today. Temperatures continue to be below normal with a high 
of 34F by the 1:00PM EST observation This is over 10 degrees lower than 
our normal high of 46F. Winds were moderate and from the NW. We saw a 
decrease in wind today after yesterday's blustery conditions. The peak
wind for yesterday was 40 kts (46 MPH). The peak wind so far today is 
29 kts (33 MPH).  
Dry conditions continue although a light fog/haze could be seen in the
distance all day. Visibility was consistent at 80 miles during each 
observation. The sky was clear at all observations with a few cumulus 
clouds at 7:00 AM and a few cirrus clouds at 1:00PM. 

Today's Observations:

7 A.M.
Weather: Clear, few cumulus NE-E
Temperature: 17F; Dew Point: -3F; Wind: NW 8 kts,
Sea-level pressure: 30.47 ins. Hg, rising, then more quickly
Visibility: 80 miles, light distant fog all directions
6-hr Max temp: 15F
6-hr Min temp: 13F
24-hr precip: Trace 
24-hr snowfall: Trace 
BHO SA 1155 CLR 80 317/17/M3/3108/047/ NEW SNW PST 24 HRS TRACE 
FEW CU NE-E LGT DSNT FG ALQDS/ 8/100 4/001 53032 10015 20013

10 A.M.
Weather: Sky clear 
Temperature: 26F; Dew Point: 1F; Wind: WNW at 14G22 kts,
Peak Wind: 26 kts (30 MPH) at 9:34 A.M.
Sea-level pressure: 30.48 ins. Hg, rising, falling
Visibility: 80 miles, light distant fog all directions
BHO SA 1455 CLR 80 321/26/01/3014G22/048/ SKC LGT DSNT FG ALQDS 
PK WND 3026/34/ 8/000 50004 

1 P.M.
Weather: Clear, few cirrus SSW 
Temperature: 34F; Dew Point: 5F; Wind: WNW at 15G24 kts,
Sea-level pressure: 29.95 ins. Hg, falling, then more quickly
Visibility: 80 miles, light distant haze
6-hr Max temp: 34F
6-hr Min temp: 13F
BHO SA 1755 CLR 80 306/34/05/2915G24/043/ FEW CI SSW LGT 
DSNT HZ/ 8/001 58015 10034 20013 


SUMMARY FOR WEDNESDAY, MARCH 22, 2017
 
TEMPERATURE (DEGREES F)
MAX.....38   NORMAL.....46
MIN.....15   NORMAL.....28
MEAN....27   NORMAL.....37

DEPARTURE FROM 30-YEAR NORMAL........................-10
TOTAL DEPARTURE FOR THE MONTH........................-82 [-3.7 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............38   DEPARTURE.........+10
TOTAL HEATING UNITS FOR THE MONTH.............764   DEPARTURE.........+72
TOTAL HEATING UNITS FOR THE SEASON...........4641   DEPARTURE........-609
TOTAL HEATING UNITS LAST SEASON TO DATE......4223   DIFFERENCE.......+418

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................46 NW  AT 2:31 P.M.
                   AERO........................50 NW  AT 2:35 P.M.
                   ASOS........................49 NW  AT 5:25 P.M.
                   DAVIS.......................47 WNW AT 2:39 P.M. RMY 51
FASTEST MILE FOR YESTERDAY.....................35 NW  AT 5:29 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE..................36 NW  AT 5:26 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE.................35 NW  AT 3:21 P.M.
AVERAGE WIND SPEED AND DIRECTION.............22.5 WNW
                   ASOS......................22.1
                   DAVIS.....................20.6 NW [323 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.19
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........2.52  DEPARTURE......-1.39
                         ASOS..............2.73
TOTAL PRECIPITATION FOR THE YEAR..........11.80  DEPARTURE......-0.53
                         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.......-0.3
TOTAL SNOWFALL FOR THE MONTH...............10.3  DEPARTURE.......+0.3
TOTAL SNOWFALL FOR THE SEASON..............62.6  DEPARTURE.......+5.6


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/+23/0.01/0.0/000/00          41 S   AERO 45 S   RMY 45
3/2  55/26/41/+10/T/T/509/75               58 W   AERO 61 W   RMY 59 
3/3  36/19/28/-4/T/T/592/87                38 W   AERO 44 W   RMY N/A
3/4  20/7/14/-18/T/T/622/91                45 NW  AERO 48 NW  RMY 51
3/5  29/5/17/-15/0.00/0.0/687/100          35 WNW AERO 43 WNW*RMY N/A
3/6  40/11/26/-6/0.00/0.0/641/93           18 WNW AERO 17 NW* RMY N/A
3/7  47/29/38/+5/0.01/0.0/000/00           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/-4/2.15/7.3/.../..           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 33/17/25/-10/0.00/0.0/.../..          36 W   AERO 37 W   RMY 38
3/17 40/22/31/-5/0.00/0.0/.../..           25 WNW AERO 24 WNW RMY 27
3/18 36/24/30/-6/0.00/0.0/.../..           26 ENE AERO 24 ENE RMY 26
3/19 35/28/32/-4/0.01/T/.../..             39 N   AERO 37 N   RMY 39
3/20 49/29/39/+2/0.00/0.0/.../..           31 N   AERO 35 N   RMY 36
3/21 52/34/43/+6/0.00/0.0/.../..           28 W   AERO 26 W   RMY N/A
3/22 38/15/27/-10/T/T/.../..               46 NW  AERO 50 NW  RMY 51 

3/23 Low temp since midnight is 13F; normal low is now 29F

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 7.3 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 23
HIGH 78 IN 1938
LOW 3 IN 1934
PRE 2.52 INS. IN 2010
SNOW 3.0 INS. IN 1977
WIND 78e MPH W IN 1940

RECORDS FOR MARCH 24
HIGH 70 IN 1920
LOW 6 IN 1906
PRECIP 1.51 INS. IN 1956
SNOWFALL 12.3 INS. IN 1956
PEAK GUST 71 MPH W IN 1968

TODAY'S REPORT PREPARED BY: Kaitlin Geagan