Friday, March 22, 2019

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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, MARCH 22, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

EARLY MORNING RAINFALL WITH SOME ICE PELLETS FALLING
THROUGHOUT THE DAY….

Rainfall overnight left 0.63 inches in the gauge at the
7 A.M. observation. At 1 P.M. an additional 0.22 inches
was measured from a mix of light rain and ice pellets.
Fog limited visibility to a maximum of 3 miles this
afternoon. Wind has been active today, with a max gust
so far of 45 mph. We observed a wind shift from NE to
W over the course of the day. Pressure continues to fall
rapidly after a decrease of almost 30 millibars since yesterday
afternoon. Since this morning, pressure has fallen another 10
millibars. The high temperature so far today is 38F, 8 degrees
below the normal daily maximum of 46F. The low since midnight
is 35F, 7 degrees above the daily normal of 28F.

Today’s Observations:

7 A.M.
Weather: Light rain
Temperature: 35F; Dew Point: 35F; Wind: NE at 22G32 kts,
Peak wind: 40 MPH (35 kts) NE at 6:17 A.M.
Sea-level pressure: 29.32 ins. Hg, falling quickly
Visibility: 1/2 mile, fog
6-hr Max temp: 37F
6-hr Min temp: 35F
24-hr Precip:  0.63 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1155 W3 X 1/2R-F 928/35/35/0422G32/932/ R-CTD PK WND
0435/17/ 8//// 70063 56061 10037 20035

10 A.M.
Weather: Light ice pellets
Temperature: 45F; Dew Point: 36F; Wind: NW at 7G12 kts,
Peak wind: 30 MPH (26 kts) NW at 8:36 A.M.
Sea-level pressure: 29.17 ins. Hg, falling quickly
Visibility: 1/2 mile, fog
3-hr Precip: 0.12 ins.
BHO SA 1455 W3 X 1/2IP-F 878/36/36/3207G12/917/ R-BCMG IP-UKN
PK WND 3226/1336/ 8//// 6012/ 56050

1 P.M.
Weather: Light ice pellets
Temperature: 37F; Dew Point: 37F; Wind: NW at 11G22 kts
Sea-level pressure: 29.10 ins. Hg, falling quickly
Visibility: 3 miles, fog
6-hr Max temp: 38F
6-hr Min temp: 35F
6-hr Precip:  0.22 ins.
6-hr snowfall: 0.0 ins.
BHO SA 1755 E60 OVC 3IP-F 853/37/37/3111G22/910/ IP-CTD/
8/02/ 6022/ 58025 10038 20035

SUMMARY FOR THURSDAY, MARCH 21, 2019

TEMPERATURE (DEGREES F)
MAX…..50   NORMAL…..46
MIN…..33   NORMAL…..28
MEAN….42   NORMAL…..37

DEPARTURE FROM 30-YEAR NORMAL…………………….+5
TOTAL DEPARTURE FOR THE MONTH……………………-32 [-1.7 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..23   DEPARTURE………-5
TOTAL HEATING UNITS FOR THE MONTH………….686   DEPARTURE……..+32
TOTAL HEATING UNITS FOR THE SEASON………..5172   DEPARTURE……..-50
TOTAL HEATING UNITS LAST SEASON TO DATE……4808   DIFFERENCE……+364

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..25 SSE AT 12:28 P.M.
AERO…………………….M
ASOS…………………….29 S   AT 12:28 P.M.
DAVIS……………………30 S   AT 12:27 P.M.  RMY N/A
FASTEST MILE FOR YESTERDAY………………….22 SSE AT 12:29 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….21 SSE AT 12:29 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………21 SE  AT  1:37 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..13.7 SSE
ASOS…………………..13.4
DAVIS………………….13.7 SE [141 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.63  DEPARTURE…….+0.43
ASOS…………..0.61
TOTAL PRECIPITATION FOR THE MONTH……….3.60  DEPARTURE…….-0.12
ASOS…………..3.60
TOTAL PRECIPITATION FOR THE YEAR……….12.54  DEPARTURE…….+0.40
ASOS………….12.65

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE……..-0.3
TOTAL SNOWFALL FOR THE MONTH……………21.0  DEPARTURE…….+11.3
TOTAL SNOWFALL FOR THE SEASON…………..45.5  DEPARTURE…….-11.2

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

03/01 38/17/28/-3/…./…/…/..           16 NNW AERO 13 NNW RMY 22
03/02 31/27/29/-2/…./…/…/..           29 NNE AERO 22 NNE RMY 30
03/03 40/25/33/+1/…./…/…/..           21 ESE AERO 14 ESE RMY N/A
03/04 35/18/27/-5/…./…/…/..           33 W   AERO 18 W   RMY 32
03/05 29/10/20/-12/0.00/0.0/…/..          28 WNW AERO 12 SW  RMY N/A
03/06 24/10/17/-15/0.00/0.0/…/..          40 WNW AERO 25 WNW RMY 41
03/07 26/6/16/-17/0.00/0.0/…/..           35 W   AERO 18 W   RMY 34
03/08 35/11/23/-10/0.00/0.0/…/..          23 WSW AERO M  M   RMY M
03/09 43/22/33/0/0.00/0.0/…/..            20 WSW AERO M  M   RMY N/A
03/10 40/26/33/0/…./…/…/..            32 ESE AERO 23 S   RMY 32
03/11 48/33/41/+7/…./…/…/..           40 NW  AERO 37 NNW RMY 41
03/12 41/27/34/0/…./…/…/..            32 N   AERO 33 N   RMY 34
03/13 43/24/34/0/…./…/…/..            18 W   AERO 21 W   RMY 23
03/14 48/32/40/0/…./…/…/..            25 S   AERO 28 S   RMY M
03/15 58/40/49/+14/0.12/0.0/…/..          37 SSW AERO 38 SSW RMY 39
03/16 50/31/41/+6/0.00/0.0/…/..           45 W   AERO 46 W   RMY 48
03/17 40/26/33/-3/0.00/0.0/…/..           40 WNW AERO M  M   RMY N/A
03/18 41/22/32/-4/0.00/0.0/…/..           29 W   AERO M  M   RMY 30
03/19 44/25/35/-1/0.00/0.0/…/..           25 W   AERO M  M   RMY N/A
03/20 50/27/39/+2/0.00/0.0/…/..           26 S   AERO M  M   RMY 29
03/21 50/33/42/+5/…./…/…/..           25 SSE AERO M  M   RMY 46

03/22 Low temp since midnight is 35F; normal low is 28F

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: Benjamin Turner