Sunday, May 28, 2017
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, MAY 28, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME
MOSTLY CLOUDY SKIES AND SEASONABLE TEMPERATURES
Skies were covered for most of the day here on top of Great Blue Hill
with light drizzle moving in just before the 1:00 PM EST observation with
no accumulation. Temperatures have been close to normal today and yesterday
with a high of 67F yesterday and 71F by 1:00 PM today. The normal high for
this time of year is 69F.
Winds remained light of out of the south west with a directional shift
just before the 1:00 PM with winds coming from the NE moving cooler air
to the top of the hill. Visibility also increased with the shift in
wind direction allowing us to see farther west than in the morning.
Today’s Observations:
7 A.M.
Weather: Few cumulus in all directions, broken altocumulus
Temperature: 56F; Dew Point: 54F; Wind: SW at 6 kts,
Wind Speed: Light
Sea-level pressure: 29.99 ins. Hg, steady the rising
Visibility: 40 miles
6-hr Max temp: 56F
6-hr Min temp: 52F
24-hr precip: 0.00 in.
BHO SA 1155 E84 BKN 40 157/56/54/2206/999/ FEW CU ALQDS WND LGT/
8/270 53021 10056 20052
10 A.M.
Weather: Scattered cumulus, scattered cirrostratus
Temperature: 66F; Dew Point: 56F; Wind: SW at 5 kts,
Wind Speed: Light
Sea-level pressure: 29.97 ins. Hg, falling then more quickly
Visibility: 50 miles
3-hr precip: 0.00 in.
BHO SA 1455 E84 SCT E250 SCT 50 150/66/56/2305/997/ WND LGT/
8/280 56007
1 P.M.
Weather: Scattered stratocumulus, broken cirrostratus
Temperature: 61F; Dew Point: 54F ; Wind: ENE at 6 kts.
Wind Speed: Light
Sea-level pressure: 29.99 ins. Hg, rising then more quickly
Visibility: 70 miles
6-hr Max temp: 71F
6-hr Min temp: 56F
6-hr precip: Trace
BHO SA 1755 45 SCT E250 BKN 70 156/61/54/0606/999/ WND LGT/
8/408 53006 6000/ 10071 20056
SUMMARY FOR SATURDAY, MAY 27, 2017
TEMPERATURE (DEGREES F)
MAX…..67 NORMAL…..69
MIN…..51 NORMAL…..51
MEAN….59 NORMAL…..60
DEPARTURE FROM 30-YEAR NORMAL…………………….-1
TOTAL DEPARTURE FOR THE MONTH……………………-30 [-1.1 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………6 DEPARTURE……….+1
TOTAL HEATING UNITS FOR THE MONTH………….288 DEPARTURE………+48
TOTAL HEATING UNITS FOR THE SEASON………..5627 DEPARTURE……..-654
TOTAL HEATING UNITS LAST SEASON TO DATE……5242 DIFFERENCE…….+385
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….18 SE AT 8:04 P.M.
AERO……………………18 SE AT 8:04 P.M.
ASOS……………………17 ESE AT 8:02 P.M.
DAVIS…………………..17 SE AT 8:03 P.M. RMY 19
FASTEST MILE FOR YESTERDAY…………………14 SE AT 8:03 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………14 SE AT 8:04 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..13 SE AT 8:04 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..6.9 NW
ASOS…………………..7.4
DAVIS………………….5.5 E [92 deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00 DEPARTURE……-0.15
ASOS…………..0.11
TOTAL PRECIPITATION FOR THE MONTH……….4.45 DEPARTURE……+0.94
ASOS…………..4.59
TOTAL PRECIPITATION FOR THE YEAR……….25.26 DEPARTURE……+3.20
ASOS……………N/A ***
*** ASOS annual total not available due to erroneous readings
PRELIMINARY CLIMATE SUMMARY FOR MAY CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/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
5/1 50/43/47/-6/T/034/04 21 N AERO 18 N RMY 22
5/2 65/42/54/+1/0.26/136/16 41 W AERO 44 W RMY 43
5/3 52/42/53/0/0.00/595/70 37 WNW*AERO 39 WNW RMY 40
5/4 65/40/53/-1/0.00/724/85 23 S AERO 23 S RMY 24
5/5 51/44/48/-6/0.73/000/00 28 E AERO 28 E RMY N/A
5/6 65/50/58/+4/0.23/094/11 46 SSE AERO 48 SSE RMY 49
5/7 63/47/55/0/T/670/78 35 S AERO 38 S RMY 39
5/8 54/38/46/-9/T/224/26 29 WSW AERO 29 WSW RMY 32
5/9 53/36/45/-10/T/251/29 20 ESE AERO 17 ESE RMY 19
5/10 57/42/50/-5/0.00/225/26 17 NNE AERO 16 NW RMY N/A
5/11 58/45/52/-4/0.00/443/51 23 NE* AERO 23 NE RMY 23
5/12 57/41/49/-7/0.01/453/52 21 NE AERO 20 NE RMY 19
5/13 57/41/49/-7/0.19/009/01 24 ENE AERO 24 E RMY N/A
5/14 47/43/45/-12/1.49/000/00 33 NNE AERO 36 N RMY 36
5/15 58/43/51/-6/0.24/018/02 36 NNW AERO 40 NNW RMY 41
5/16 79/51/65/+8/0.00/870/99 26 WNW AREO 26 WNW RMY 29
5/17 90/60/75/+18/T/775/88 32 SSE AERO 33 SW* RMY 34
5/18 96/69/83/+25/0.01/830/94 39 WNW AERO 41 WNW RMY 42 TSTM
5/19 89/56/73/+15/T/832/94 35 W AERO 33 W RMY 37
5/20 67/49/58/0/0.00/…/.. 23 NE AERO 22 NE RMY 21
5/21 66/45/56/-3/0.00/…/.. 21 E AERO 20 S RMY 21
5/22 53/48/51/-8/…./…/.. 22 S AERO 22 S RMY 23
5/23 70/51/61/+2/…./…/.. 21 NNW AERO 18 NNW RMY 19
5/24 65/53/59/0/0.00/…/.. 17 E AERO 16 E RMY N/A
5/25 52/49/51/-9/…./…/.. 36 E AERO 38 E RMY N/A
TSTM
5/26 56/46/51/-9/…./…/.. 35 N AERO 37 N RMY N/A
5/27 67/51/59/6/0.00/0.0/…/.. 18 SE AERO 18 SE RMY 19
5/27 Low temp since midnight is 50F; normal low is now 51F
DAILY RECORDS FOR MAY
5/17/17: DAILY RECORD MAXIMUM TEMPERATURE OF 90F,
BREAKS PREVIOUS RECORD OF 88F SET IN 1974
AND TIED IN 1977
5/17/17: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 60F,
TIES PREVIOUS RECORD SET IN 1932
5/18/17: DAILY RECORD MAXIMUM TEMPERATURE OF 96F,
BREAKS PREVIOUS RECORD OF 88F SET IN 1906
AND TIED IN 1936 AND 1986;
BREAKS PREVIOUS MONTHLY RECORD OF 94F SET ON
MAY 26, 2010
5/18/17: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 69F,
BREAKS PREVIOUS RECORD OF 61F SET IN 1943
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR MAY 28
HIGH 92F IN 2016
LOW 39F IN 1917
PRECIP 2.48 INS 1906
PEAK GUST 51e MPH NE IN 1946
RECORDS FOR MAY 29
HIGH 93F IN 1919
LOW 35F IN 1902
PRECIP 1.63 INS 1990
PEAK GUST 55e MPH NNW IN 1943, WNW IN 1945
TODAY’S REPORT PREPARED BY: Kaitlin Ann Geagan
