Wednesday, June 4, 2014

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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, JUNE 4, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME

OVERNIGHT SHOWERS PRODUCE FIRST PRECIPITATION OF THE MONTH

A cold front moved through early this morning dropping 0.06 inches of
new rainfall by the 7:00 AM EST observation, with an additional
0.05 inches falling by 10:00 AM EST. Temperatures have remained
much cooler than earlier in the week with a maximum of 62F reached
by the 1:00 PM EST observation.

More monthly statistics and analysis will follow in the coming
days, so pleased check back on BlueHill.org for more information.

THE PRELIMINARY MAY 2014 STATS

[Departures are relative to the 1981-2010 averages]

TEMPERATURE: Deg. F
Avg. Max. 67.7 [+1.4] Avg. Min. 48.3 [+0.5] Mean      58.0 [+0.9] 24-hr. corrected mean: 57.3
Max. temp: 85F on the 12th
Min. temp: 39F on the 29th
Total heating degree day units: 223 [-45] Total seasonal heating units:   6394 [91 more than average] [Season starts 7/1] Seasonal total this date 2013:  5734 [660 more than last season] Total cooling degree day units: 13 [-9] Total seasonal cooling units:   13 [-11 less than average] [Season starts 1/1] Seasonal total this date 2013:  31 [-18 less than last season]

PRECIPITATION: Inches
Total: 3.22 [-0.89] Greatest in 24 hours: 1.30 (16-17th)
Total snowfall: 0 [+/-0.0] Greatest in 24 hours: 0

WIND
Av. speed (uncorrected): 10.9 mph
Av. speed (corrected):   11.4 mph
Prevailing direction: S 12%

SUNSHINE
Total astronomical minutes: 12,688 of possible 27,136 or 47%
Total Campbell Stokes card minutes; 12,276 of possible 26,226 or 47%

Today’s Observations:

7 A.M.
Weather: Showers in the vicinity SW-NW, overcast nimbostratus,
few stratus/stratus fractus in all directions
Temperature: 54F; Dew Point: 51F; Wind: estimated E at 3 kts
Wind Speed: Light
Sea-level pressure: 29.90 ins. Hg, rising, then more quickly
Visibility: 15 miles, 8 miles SW-NW, 20 miles E-SW, obscured
by rain showers and light fog in all directions
6-hr max temp: 57F
6-hr min temp: 52F
24-hr precip: 0.06 inches
BHO SA 1155 E30 OVC 15 125/54/51/E0803/990/ VCSH SW-NW
VSBY SW-NW 8 MI AND E-SW 20 MI FEW ST/STFRA AQLDS LGT FG ALQDS
WND LGT/ 8/72/ 53004 ASOS 60006 70006 MANUAL 60006 70006 10057
20052

10 A.M.
Weather: Overcast altostratus, few stratus distant offshore NE
Temperature: 57F; Dew Point: 43F; Wind: SE at 4 kts
Wind Speed: Light
Sea-level pressure: 29.89 ins. Hg, steady, then falling
Visibility: 15 miles, 25 miles SE-SSW, obscured by light fog
in all directions
3-hr precip: 0.05 inches
BHO SA 1455 E5 OVC 15 122/57/43/E1404/989/ FEW ST DSNT OFFSHR NE
VSBY SE-SSW 25 MI LGT FG ALQDS WND LGT/ 8/62/ 58003 ASOS 60005
MANUAL 60005

1 P.M.
Weather: Overcast altostratus, showers distant WSW
Temperature: 61F; Dew Point: 56F; Wind: ENE at 4 kts
Wind Speed: Light
Sea-level pressure: 29.84 ins. Hg, falling, then falling more quickly
Visibility: 20 miles, 15 miles WSW and N, light fog in all directions
6-hr max temp: 62F
6-hr min temp: 54F
6-hr precip: 0.05 inches
BHO SA 1755 E9 OVC 20 105/61/56/E0704/984/ SHWRS DSNT WSW VSBY WSW
AND N 15 MI LGT FG ALQDS WND LGT/ 8/02/ 58017 6/005 10062 20054

WEATHER SUMMARY FOR TUESDAY, JUNE 3, 2014

TEMPERATURE (DEGREES F)
MAX…..81    NORMAL…..71
MIN…..57    NORMAL…..53
MEAN….69    NORMAL…..62

DEPARTURE FROM 30-YEAR NORMAL……………………..+7
TOTAL DEPARTURE FOR THE MONTH…………………….+10 [+3.1 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………0  DEPARTURE……….-4
TOTAL HEATING UNITS FOR THE MONTH……………5  DEPARTURE……….-9
TOTAL HEATING UNITS FOR THE SEASON………..6399  DEPARTURE………+82
TOTAL HEATING UNITS LAST SEASON TO DATE……5734  DIFFERENCE…….+665

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..4   DEPARTURE……….+2
TOTAL COOLING UNITS FOR THE MONTH…………..6   DEPARTURE……….+1
TOTAL COOLING UNITS FOR THE SEASON…………19   DEPARTURE………-10
TOTAL COOLING UNITS LAST SEASON TO DATE…….57   DIFFERENCE……..-38

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………25  SSE AT   5:28 P.M.*
ASOS…………………..26  ESE AT   2:57 P.M.
DAVIS………………….28  SSE AT   2:19 P.M. RMY 28
FASTEST MILE FOR YESTERDAY………………..19  SSE AT   5:05 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..18  SE  AT   4:58 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….18  SE  AT   4:58 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..10.0 SE
ASOS…………………..9.4
DAVIS………………….9.2 SSE [163 deg] * Last of several occurrences…

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.06  DEPARTURE………….-0.10
ASOS…………..0.06
TOTAL PRECIPITATION FOR THE MONTH……….0.06  DEPARTURE………….-0.43
ASOS…………..0.06
TOTAL PRECIPITATION FOR THE YEAR……….22.40  DEPARTURE………….-0.75
ASOS………….22.77

PRELIMINARY CLIMATE SUMMARY FOR MAY 2014 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/RMY 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  64/43/54/+1/0.49/0.0/093/11          32 SSE RMY 36
5/2  68/51/60/+7/T/0.0/457/54             28 W   RMY 29
5/3  66/48/57/+4/0.00/0.0/332/39          21 SW  RMY N/A
5/4  60/47/54/0/0.01/0.0/400/47           51 WNW RMY 54
5/5  64/46/55/+1/T/0.0/592/70             30 NW  RMY 32
5/6  63/42/53/-1/T/0.0/506/59             30 NW  RMY 30
5/7  64/42/55/0/0.00/0.0/850/99           21 WNW RMY 23
5/8  69/48/59/+4/0.00/0.0/612/71          17 SSW RMY 19
5/9  57/51/54/-1/0.05/0.0/000/00          21 S   RMY N/A
5/10 78/57/68/+13/0.10/0.0/043/05         33 S   RMY 37  TSTM
5/11 79/58/69/+13/0.01/0.0/746/86         30 W   RMY N/A
5/12 85/49/67/+11/0.00/0.0/792/91         39 NE  RMY 42
5/13 54/42/48/-8/0.00/0.0/113/13          32 NE  RMY N/A
5/14 73/42/58/+1/T/ 0.0/613/70            22 S   RMY 24
5/15 77/57/67/+10/T/0.0/140/16            27 S   RMY 33
5/16 73/60/67/+10/0.26/0.0/026/03         36 S   RMY 41
5/17 74/52/63/+6/1.04/0.0/555/63          36 SSE RMY N/A
5/18 67/47/57/-1/0.00/0.0/521/59          20 NW  RMY N/A
5/19 65/48/56/-2/0.12/0.0/443/50          35 NNW RMY 38
5/20 71/48/60/+2/T/0.0/771/89             25 NNW RMY 26
5/21 71/51/61/+2/0.00/0.0/844/95          18 ESE RMY 20
5/22 67/51/59/0/0.26/0.0/116/13           15 SSE RMY 18
5/23 60/49/55/-4/0.05/0.0/000/00          16 NE  RMY 18
5/24 65/49/57/-2/0.02/0.0/277/31          17 ENE RMY 18
5/25 71/49/60/0/0.00/0.0/430/48           20 S   RMY N/A
5/26 76/52/64/+4/0.05/0.0/108/12          30 W   RMY 34
5/27 74/47/61/+1/0.37/0.0/242/27          25 NE  RMY 31  TSTM
5/28 48/40/44/-17/0.30/0.0/000/00         32 NE  RMY 35
5/29 61/39/50/-11/0.00/0.0/847/94         17 NNE RMY 18
5/30 71/45/58/-3/0.09/0.0/…/..          20 S   RMY 22  TSTM
5/31 60/49/55/-6/0.00/0.0/…/..          22 NE  RMY 25

6/1  72/47/60/-2/0.00/0.0/…/..          21 NNW RMY 21
6/2  81/52/67/+5/0.00/0.0/…/..          22 SSW RMY 23
6/3  81/57/69/+7/…./…/…/..          25 SSE RMY 28

6/4 morning low temp: 52F; the normal low is now 54F

DAILY RECORDS FOR MAY 2014
None so far.

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

RECORDS FOR JUNE 4
HIGH 99F IN 1919 [Record for month] LOW 41F IN 1915,1926
PRECIP 1.52 INS IN 2007
PEAK GUST 48 MPH SSE IN 1983

RECORDS FOR JUNE 5
HIGH 95F IN 1930
LOW 41F IN 1891
PRECIP 2.83 INS IN 1982
PEAK GUST 57 MPH NNW IN 1988

TODAY’S REPORT PREPARED BY: Brian Fitzgerald