Thursday, May 26, 2016

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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, MAY 26, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME

LIGHT WINDS AND PARTLY CLOUDY SKIES AS TEMPERATURES REACH
MID-80s

Temperatures again reached mid-80s today with a maximum temp.
of 86F recorded at the 1:00PM EST observation, 17F above normal.
The overnight low temp. was 64F, 4F above normal.

Winds were light all day and from the east by 1:00PM.  Skies were
party cloudy with cirrus visible all day and cumulus forming by early
afternoon.  Visibility was restricted to 20 miles due to hazy conditions.

Today’s Observations:

7 A.M.
Weather: Few cirrus in all directions
Temperature: 71F; Dew Point: 56F; Wind: NW at 7 kts
Sea-level pressure: 30.13 ins. Hg, rising, then more slowly
Visibility: 20 miles, hazy
6-hr Max temp: 71F
6-hr Min temp: 64F
BHO SA 1155 CLR 20 202/71/56/3207/013/ FEW CI ALQDS HAZY/
8/001 51016 10071 20064

10 A.M.
Weather: Scattered cirrus
Temperature: 79F; Dew Point: 56F; Wind: estimated NNW 3 kts
Wind: Light and variable
Sea-level pressure: 30.12 ins. Hg, falling, then more quickly
Visibility: 20 miles, hazy
BHO SA 1455 250 SCT 20 199/79/56/E3303/012/ HAZY WND L/V/ 8/001
58003

1 P.M.
Weather: Few cumulus in all directions, scattered cirrus
Temperature: 85F; Dew Point: 58F; Wind: estimated E at 4 kts,
Wind: Light and variable
Sea-level pressure: 30.08 ins. Hg, falling, then more quickly
Visibility: 20 miles, hazy
6-hr Max temp: 86F
6-hr Min temp: 70F
BHO SA 1755 250 SCT 20 186/85/58/E0904/008/ FEW CU ALQDS HAZY
WND L/V/ 8/101 58013 10086 20070

SUMMARY FOR WEDNESDAY, MAY 25, 2016

TEMPERATURE (DEGREES F)
MAX…..86   NORMAL…..69
MIN…..51   NORMAL…..51
MEAN….69   NORMAL…..60

DEPARTURE FROM 30-YEAR NORMAL……………………..+9
TOTAL DEPARTURE FOR THE MONTH…………………….-36 [-1.3 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………0   DEPARTURE……….-6
TOTAL HEATING UNITS FOR THE MONTH………….250   DEPARTURE………+16
TOTAL HEATING UNITS FOR THE SEASON………..5242   DEPARTURE…….-1027
TOTAL HEATING UNITS LAST SEASON TO DATE……6401   DIFFERENCE……-1159

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….25 W   AT  5:14 P.M.
ASOS……………………26 W   AT  3:23 P.M.
DAVIS…………………..25 WSW AT  5:14 P.M. RMY 25
FASTEST MILE FOR YESTERDAY…………………19 W   AT  6:27 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………20 W   AT  3:25 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..18 W   AT  3:25 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..9.8 W
ASOS…………………..9.6
DAVIS………………….8.5 W [260 Deg.] * Last of several occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.16
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….2.26  DEPARTURE……-0.95
ASOS…………..2.09
TOTAL PRECIPITATION FOR THE YEAR……….19.20  DEPARTURE……-2.56
ASOS………….19.51

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE……..0.0
TOTAL SNOWFALL FOR THE MONTH…………..TRACE  DEPARTURE……..0.0
TOTAL SNOWFALL FOR THE SEASON…………..57.5  DEPARTURE…….-5.7

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

5/1 52/39/46/-7/0.08/T/000/00               21 S   AERO 22 SE  RMY 20
5/2 50/41/46/-7/0.31/0.0/000/00             20 NE  AERO 21 NE  RMY 18
5/3 48/43/46/-7/0.16/0.0/000/00             16 E   AERO 16 E   RMY 17
5/4 48/41/45/-9/0.53/0.0/000/00             33 NE  AERO 35 NE  RMY 34
5/5 44/41/43/-11/0.30/0.0/000/00            39 NNE AERO 41 NNE RMY 39
5/6 54/43/49/-5/0.13/0.0/360/42             28 ENE AERO 29 N   RMY 26
5/7 51/43/47/-8/…/0.0/000/00              25 NE  AERO 25 NE  RMY 23
5/8 60/46/53/-2/…/0.0/284/33              47 W   AERO 53 W   RMY 49
5/9 65/43/54/-1/0.00/0.0/743/86             40 W   AERO 44 W   RMY 40
5/10 69/40/55/0/0.00/0.0/806/93             22 W   AERO 25 WNW RMY 22
5/11 76/50/63/+7/0.00/0.0/808/93            22 WNW AERO 23 WNW*RMY 22
5/12 75/54/65/+9/0.00/0.0/819/94            23 NNE AERO 25 S   RMY 23
5/13 74/52/63/+7/0.21/0.0/079/09            27 S   AERO 27 S   RMY 26
5/14 78/54/66/+9/0.00/0.0/656/75            35 SSW*AERO 40 SSW RMY 37
5/15 60/41/51/-6/0.00/0.0/588/67            50 W   AERO 54 W   RMY 49
5/16 58/38/48/-9/0.00/0.0/800/91            45 W*  AERO 51 WNW RMY 49
5/17 69/47/58/+1/0.00/0.0/344/39            32 W   AERO 38 W   RMY 38
5/18 64/48/56/-2/0.00/0.0/804/91            24 NE  AERO 26 NNW RMY N/A
5/19 66/49/58/0/0.26/0.0/…/..             23 WNW AERO 26 WNW RMY 25
5/20 73/46/60/+2/0.00/0.0/…/..            20 SSE AERO 22 SSE RMY 21
5/21 74/53/64/+5/0.00/0.0/…/..            21 S   AERO 23 S   RMY 21
5/22 64/53/59/0/T/0.0/…/..                26 ENE AERO 29 ENE RMY 26
5/23 74/51/63/+4/T/0.0/…/..               22 ENE AERO 31 ENE RMY N/A
5/24 56/50/53/-6/…/0.0/…/..             30 ENE AERO 31 ENE RMY 29
5/25 86/51/69/+9/…/0.0/…/..             25 W   AERO 28 W   RMY 25

5/26 low temp since midnight is 64F; normal low now 51F

* Last of several occurrences
* All sunshine data corrected to astronomical minutes.

DAILY RECORDS FOR MAY 2016

5/1/16: DAILY RECORD SNOWFALL OF A TRACE,
TIES PREVIOUS RECORDS SET IN 1905, 1917, 1921, and 1995

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):

RECORDS FOR MAY 26
HIGH 94F IN 2010  (RECORD FOR MAY)
LOW 37F IN 1972,2013
PRECIP 1.73 INS IN 2003
SNOWFALL TRACE IN 1967 (Fell as ice pellets in nor’easter)
PEAK GUST 62 MPH NE IN 1967

RECORDS FOR MAY 27
HIGH 92F IN 1914
LOW 36F IN 1915
PRECIP 1.40 INS IN 1898
PEAK GUST 55 S IN 1956

TODAY’S REPORT PREPARED BY: Cece Borries-Strigle