Wednesday, May 22, 2019
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, MAY 22, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME
FAIR WEATHER WITH DECREASING NORTHWESTERLY WINDS
IN THE AFTERNOON….
We observed fair weather conditions today, with
a translucent layer of cirrus clouds becoming more
prominent following noontime. Wind has decreased in
intensity since this morning, becoming light and
variable shortly following the 1 P.M. observation.
An excellent visibility of 85 miles was seen throughout
the day. Humidity has been low since this morning, reaching
only 30 percent in the afternoon. The high so far today is
67F, a degree below the daily normal maximum of 68F. the
low since midnight is 49F, a degree below the normal
minimum of 50F.
Today’s Observations:
7 A.M.
Weather: Scattered cirrostratus, few altocumulus
Temperature: 54F; Dew Point: 35F; Wind: NNW at 12G25 kts,
Peak wind: 32 MPH (28 kts) NNW at 6:14 A.M.
Sea-level pressure: 30.13 ins. Hg, rising steadily
Visibility: 85 miles
6-hr Max temp: 54F
6-hr Min temp: 49F
24-hr Precip: 0.00 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1155 250 SCT 85 202/54/35/3412G25/013/ FEW AC
ALQDS PK WND 3028/14/ 8/085 51024 10054 20049
10 A.M.
Weather: Broken cirrostratus, few cumulus
Temperature: 60F; Dew Point: 36F; Wind: NW at 14G19 kts
Sea-level pressure: 30.18 ins. Hg, rising steadily
Visibility: 85 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 250 BKN 85 221/60/36/3314G19/018/ FEW CU
ALQDS/ 8/107 51019
1 P.M.
Weather: Broken cirrostratus, few cumulus
Temperature: 67F; Dew Point: 35F; Wind: NW at 15G28 kts
Sea-level pressure: 30.17 ins. Hg, rising then falling
Visibility: 85 miles
6-hr Max temp: 67F
6-hr Min temp: 54F
6-hr Precip: 0.00 ins.
BHO SA 1755 250 BKN 85 219/67/35/3308G18/017/ FEW CU
ALQDS/ 8/107 58002 10067 20054
SUMMARY FOR TUESDAY, MAY 21, 2019
TEMPERATURE (DEGREES F)
MAX…..69 NORMAL…..68
MIN…..50 NORMAL…..49
MEAN….60 NORMAL…..58
DEPARTURE FROM 30-YEAR NORMAL……………………+2
TOTAL DEPARTURE FOR THE MONTH…………………..-54 [-2.8 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………4 DEPARTURE………-3
TOTAL HEATING UNITS FOR THE MONTH………….253 DEPARTURE……..+49
TOTAL HEATING UNITS FOR THE SEASON………..6154 DEPARTURE……..-88
TOTAL HEATING UNITS LAST SEASON TO DATE……5817 DIFFERENCE……+337
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………0 DEPARTURE………-1
TOTAL COOLING UNITS FOR THE MONTH……………4 DEPARTURE………-6
TOTAL COOLING UNITS FOR THE SEASON…………..4 DEPARTURE………37
TOTAL COOLING UNITS LAST SEASON TO DATE……..37 DEPARTURE……..-33
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..40 NW AT 5:27 P.M.
AERO…………………….46 NW AT 1:24 P.M.
ASOS…………………….45 NW AT 3:38 P.M.
DAVIS……………………45 W AT 3:37 P.M. RMY 45
FASTEST MILE FOR YESTERDAY………………….32 NW AT 3:37 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….30 NW AT 3:39 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………32 W AT 3:39 P.M.
AVERAGE WIND SPEED AND DIRECTION……………19.1 NW
ASOS……………………18.9
DAVIS…………………..19.1 W [271 deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00 DEPARTURE…….-0.13
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….3.00 DEPARTURE…….+0.39
ASOS…………..2.82
TOTAL PRECIPITATION FOR THE YEAR……….24.18 DEPARTURE…….+3.02
ASOS………….24.03
PRELIMINARY CLIMATE SUMMARY FOR MAY 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
05/01 57/40/49/-4/0.00/0.0/…/.. 21 S AERO 21 SSE RMY 21
05/02 45/41/43/-10/0.02/0.0/…/.. 21 NE AERO 21 SSW RMY 20
05/03 60/43/52/-1/…./…/…/.. 23 S AERO 23 S RMY 22
05/04 54/46/50/-4/…./…/…/.. 14 ENE AERO 14 ENE RMY 17
05/05 52/44/48/-6/0.00/0.0/…/.. 18 NE AERO 20 NE RMY N/A
05/06 58/44/51/-3/…./0.0/…/.. 25 NE AERO 26 ENE RMY 24
05/07 72/41/57/+2/0.12/0.0/…/.. 30 S AERO 29 S RMY 30
05/08 67/48/58/+3/0.00/0.0/…/.. 20 NE AERO 20 NE RMY 19
05/09 60/43/52/-3/0.00/0.0/…/.. 21 SE AERO 21 E RMY 22
05/10 61/46/54/-1/0.16/0.0/…/.. 35 S AERO 37 S RMY 37
05/11 68/50/59/+3/…./…/…/.. 26 NW AERO M M RMY N/A
05/12 50/36/43/-13/0.68/…/…/.. 30 ENE AERO M M RMY N/A
05/13 52/38/45/-11/…./…/…/.. 35 E AERO M M RMY 34
05/14 44/38/41/-16/…./…/…/.. 26 NNE AERO M M RMY 25
05/15 58/40/49/-8/…./…/…/.. 28 NW AERO M M RMY 28
05/16 68/46/57/0/…./…/…/.. 17 NW AERO M M RMY 19
05/17 64/49/57/0/…./…/…/.. 22 WNW AERO 21 WNW RMY 25
05/18 72/49/61/+3/…./…/…/.. 26 SSE AERO 25 SSE RMY 29
05/19 69/50/60/+2/…./…/…/.. 39 S AERO 43 SSE RMY 42
05/20 85/52/69/11/…./…/…/.. 35 SW AERO 40 SW RMY 39
05/21 69/52/61/+2/0.00/…/…/.. 40 NW AERO 46 NW RMY 45
05/22 Low temp since midnight is 49F; normal low is 50F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR MAY 22
HIGH 93F IN 1911
LOW 35F IN 1907
PRECIP 3.75 INCHES IN 1920
PEAK GUST 49e MPH SSW IN 1947
RECORDS FOR MAY 23
HIGH 92F IN 1964,1992
LOW 38F IN 1976
PRECIP 0.97 INS IN 1979
PEAK GUST 49e MPH W IN 1945
TODAY’S REPORT PREPARED BY: Benjamin Turner
