Wednesday, March 22, 2017

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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, MARCH 22, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME

BLUSTERY CONDITIONS AND BELOW NORMAL TEMPERATURES RETURN

Temperatures remained above freezing overnight, but slowly
fell to 29F by 1:00PM EST from an overnight low of 33F.
Winds picked up after 6:00AM EST. The peak gust by 1:00PM EST
was 37 kts (43 MPH).

Dry conditions continue and visibility was 70 miles during each
observation except there was a distant fog SSW-NNE at the 7:00 AM
observation limiting visibility to 40 miles. Despite dry conditions
a short snow squall moved through just after 8:00AM EST.

Today’s Observations:

7 A.M.
Weather: Clear, few altocumulus cumulogenitus SSW-NNE
and few cirrostratus all directions
Temperature: 36F; Dew Point: 22F; Wind: W 18G24 kts,
Peak Wind: 27kts (31 MPH) W at 6:39 A.M.
Sea-level pressure: 29.78 ins. Hg, falling then rising
Visibility: 70 miles except 40 miles SSW-NNE, distant fog
SSW-NNE
6-hr Max temp: 37F
6-hr Min temp: 33F
24-hr precip: 0.00 in.
24-hr snowfall: 0.0 in.
BHO SA 1155 CLR 70 085/36/22/2818G24/978/ FEW ACCU SSW-NNE
FEW CS ALQDS DSNT FG SSW-NNE VSBY SSW-NNE 40 PK WND 2827/39/
8/065 4/002 53010 10037 20033

10 A.M.
Weather: Broken cumulus, broken stratocumulus
Temperature: 34F; Dew Point: 16F; Wind: WNW at 23G33 kts,
Peak Wind: 36 kts (41 MPH) at 9:27 A.M.
Sea-level pressure: 29.86 ins. Hg, rising, then more steadily
Visibility: 70 miles
3-hr precip: Trace
3-hr snowfall: Trace
BHO SA 1455 E30 BKN E42 BKN 70 112/34/16/3023G33/986/
PK WND 3036/27 NEW SNW PST 3 HRS TRACE/ 8/800 53027 MANUAL 6000/

1 P.M.
Weather: Clear, few cumulus all directions
Temperature: 29F; Dew Point: 4F; Wind: NW at 25G34 kts,
Peak Wind: 36 kts (41 MPH) at 12:05 P.M.
Sea-level pressure: 29.95 ins. Hg, rising, then more slowly
Visibility: 70 miles
6-hr Max temp: 37F
6-hr Min temp: 29F
6-hr precip: Trace
6-hr snowfall: Trace
BHO SA 1755 CLR 70 141/29/04/3125G34/995/ FEW CU ALQDS PK WND 3036/05
NEW SNW PST 6 HRS TRACE/ 8/100 51029 MANUAL 6000/ 10037 20029

SUMMARY FOR TUESDAY, MARCH 21, 2017

TEMPERATURE (DEGREES F)
MAX…..52   NORMAL…..46
MIN…..34   NORMAL…..28
MEAN….43   NORMAL…..37

DEPARTURE FROM 30-YEAR NORMAL…………………….+6
TOTAL DEPARTURE FOR THE MONTH……………………-72 [-3.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..22   DEPARTURE……….-6
TOTAL HEATING UNITS FOR THE MONTH………….726   DEPARTURE………+72
TOTAL HEATING UNITS FOR THE SEASON………..4603   DEPARTURE……..-619
TOTAL HEATING UNITS LAST SEASON TO DATE……4196   DIFFERENCE…….+407

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….28 W   AT 9:36 P.M.
AERO……………………26 W   AT 9:36 P.M.
ASOS……………………29 W   AT 9:36 P.M.
DAVIS…………………..26 WNW AT 9:36 P.M. RMY N/A
FASTEST MILE FOR YESTERDAY…………………18 W   AT 9:47 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………18 W   AT 9:52 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..18 WNW AT 9:48 P.M.
AVERAGE WIND SPEED AND DIRECTION………….10.0 W
ASOS…………………..9.9
DAVIS………………….8.9 NW [313 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.20
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….2.52  DEPARTURE……-1.20
ASOS…………..2.73
TOTAL PRECIPITATION FOR THE YEAR……….11.80  DEPARTURE……-0.34
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…….+0.6
TOTAL SNOWFALL FOR THE SEASON…………..62.6  DEPARTURE…….+5.9

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 Low temp since midnight is 29F; normal low is now 28F

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 22
HIGH 81 IN 2012
LOW 3 IN 1885
PRE 3.48 INS. IN 2001
SNOW 8.7 INS. 1967
WIND 84e MPH E IN 1977

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

TODAY’S REPORT PREPARED BY: Kaitlin Geagan