Monday, May 29, 2017
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, MAY 29, 2017 MEMORIAL DAY
ALL TIMES ARE IN EASTERN STANDARD TIME
LIGHT DRIZZLE BEGINS IN LATE MORNING
Skies were overcast all morning with low stratus clouds.
Fog moved into the area by noon, restricting horizontal
visibility to 3 miles and vertical visibility to 300 feet
by the 1:00PM observation. Very light drizzle began after
10:00am and continued through 1:00PM. Only a trace of
precip. was measured for the day.
Temperatures have been cool and dropping from a 7:00AM
maximum reading of 50F. Winds continue to be fairly light
for BHO. A peak gust of 21 MPH was recorded this morning.
Today’s Observations:
7 A.M.
Weather: Overcast stratus
Temperature: 50F; Dew Point: 48F; Wind: E at 10 kts
Sea-level pressure: 30.02 ins. Hg, rising, then more slowly
Visibility: 20 miles, except 10 miles NNW-E, distant fog in all
directions
6-hr Max temp: 50F
6-hr Min temp: 48F
24-hr precip: Trace
BHO SA 1155 E4 OVC 20 165/50/48/0810/002/ VSBY NNW-E 10 DSNT FG
ALQDS/ 8/6// 51008 10050 20048
10 A.M.
Weather: Overcast stratus
Temperature: 49F; Dew Point: 46F; Wind: E at 11 kts
Sea-level pressure: 30.01 ins. Hg, falling then rising
Visibility: 8 miles, except 15 miles S-WSW, distant fog in all
directions
BHO SA 1455 E4 OVC 8 162/49/46/0811/001/ VSBY S-WSW 15 DSNT FG
ALQDS/ 8/6// 55003
1 P.M.
Weather: Light drizzle, sky obscurement due to fog
Temperature: 48F; Dew Point: 46F; Wind: ENE at 8 kts
Sea-level pressure: 30.04 ins. Hg, rising unsteadily
Visibility: 3 miles
6-hr Max temp: 50F
6-hr Min temp: 48F
6-hr precip: Trace
BHO SA 1755 W3 X 3L-F 173/48/46/0608/004/ PCPN VRY LGT/
8//// 51011 MANUAL 600// 10050 20048
SUMMARY FOR SUNDAY, MAY 28, 2017
TEMPERATURE (DEGREES F)
MAX…..71 NORMAL…..70
MIN…..51 NORMAL…..51
MEAN….61 NORMAL…..61
DEPARTURE FROM 30-YEAR NORMAL……………………..0
TOTAL DEPARTURE FOR THE MONTH……………………-30 [-1.3 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………4 DEPARTURE……….-2
TOTAL HEATING UNITS FOR THE MONTH………….298 DEPARTURE………+46
TOTAL HEATING UNITS FOR THE SEASON………..5631 DEPARTURE……..-656
TOTAL HEATING UNITS LAST SEASON TO DATE……5242 DIFFERENCE…….+389
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….18 SSW AT 2:44 A.M.*
AERO……………………18 SSW AT 9:54 P.M.
ASOS……………………19 S AT 8:29 P.M.
DAVIS…………………..18 SSW AT 2:43 A.M. RMY 18
FASTEST MILE FOR YESTERDAY…………………14 S AT 8:28 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………15 SSW AT 2:58 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..13 SSW AT 2:58 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..8.2 S
ASOS…………………..9.1
DAVIS………………….6.6 S [180 deg.]
*last of multiple occurrences
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…Trace DEPARTURE……-0.15
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….4.45 DEPARTURE……+0.79
ASOS…………..4.59
TOTAL PRECIPITATION FOR THE YEAR……….25.26 DEPARTURE……+3.05
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/814/92 35 W AERO 33 W RMY 37
5/20 67/49/58/0/0.00/709/80 23 NE AERO 22 NE RMY 21
5/21 66/45/56/-3/0.00/773/87 21 E AERO 20 S RMY 21
5/22 53/48/51/-8/…./000/00 22 S AERO 22 S RMY 23
5/23 70/51/61/+2/…./366/41 21 NNW AERO 18 NNW RMY 19
5/24 65/53/59/0/0.00/116/13 17 E AERO 16 E RMY N/A
5/25 52/49/51/-9/…./000/00 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
5/28 71/51/61/0/T/…./.. 18 SSW*AERO 18 SSW RMY 18
5/29 Low temp since midnight is 48F; normal low is now 52F
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 29
HIGH 93F IN 1919
LOW 35F IN 1902
PRECIP 1.63 INS 1990
PEAK GUST 55e MPH NNW IN 1943, WNW IN 1945
RECORDS FOR MAY 30
HIGH 93F IN 1929
LOW 39F IN 1949,1961
PRECIP 1.47 INS 1948
PEAK GUST 61e MPH NW IN 1945
TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle
