Sunday, July 24, 2016

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JULY 24, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME

COOLER DAY WITH LOWER DEW POINTS,
EVENING RAIN SHOWERS LEAVE TRACE OF PRECIP

An early evening rain shower on Saturday left only a trace of precip.
The passing storm brought a peak gust of 45 MPH NNW at 6:32 PM EST.

Today’s temperatures have been slightly cooler than previous days with the
maximum temperature by the 1:00PM observation reaching 88F.  Dew points
were in a comfortable range of 55F-60F.  Visibility was also clearer and
remained 70 miles at each observation.

Today’s Observations:

7 A.M.
Weather: Few altocumulus SSW-NW
Temperature: 72F; Dew Point: 60F; Wind: NW at 8 kts
Sea-level pressure: 29.94 ins. Hg, rising, then steady
Visibility: 70 miles
6-hr Max temp:72F
6-hr Min temp: 64F
24-hr precip: 0.00 in.
BHO SA 1155 CLR 70 140/72/60/3208/994/ FEW AC SSW-NW/ 8/030 50012
10072 20064

10 A.M.
Weather: Scattered cumulus, scattered cirrostratus
Temperature: 80F; Dew Point: 58F; Wind: W at 5 kts,
Wind: Light and variable
Sea-level pressure: 29.95 ins. Hg, rising, then falling
Visibility: 70 miles
BHO SA 1455 36 SCT 220 SCT 70 142/80/58/E2605/995/ WND L/V/ 8/108 50002

1 P.M.
Weather: Few cumulus in all directions, scattered altocumulus,
scattered cirrus
Temperature: 88F; Dew Point: 58F; Wind: WNW at 9G15 kts
Sea-level pressure: 29.94 ins. Hg, steady
Visibility: 70 miles
6-hr Max temp: 88F
6-hr Min temp: 71F
BHO SA 1755 SCT 180 SCT 250 140/88/58/3009G15/994/ FEW CU ALQDS/
8/184 54000 10088 20071

SUMMARY FOR SATURDAY, JULY 23, 2016

TEMPERATURE (DEGREES F)
MAX…..95   NORMAL…..81
MIN…..68   NORMAL…..63
MEAN….82   NORMAL…..72

DEPARTURE FROM 30-YEAR NORMAL……………………+10
TOTAL DEPARTURE FOR THE MONTH……………………+50 [+2.0 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..17   DEPARTURE……….+9
TOTAL COOLING UNITS FOR THE MONTH………….212   DEPARTURE………+51
TOTAL COOLING UNITS FOR THE SEASON…………369   DEPARTURE………+79
TOTAL COOLING UNITS LAST SEASON TO DATE…….314   DIFFERENCE……..+55

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….45  NNW  AT  6:32 P.M.
AEROVANE………………..48  NNW  AT  6:25 P.M.
ASOS……………………46  NNW  AT  6:33 P.M.
DAVIS…………………..42  NW   AT  6:32 P.M.  RMY 44
FASTEST MILE FOR YESTERDAY…………………33  NNW  AT  6:29 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………32  NNW  AT  6:29 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..28  NNW  AT  6:32 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..11.6 W
ASOS…………………..11.2
DAVIS………………….10.0 W [270 Deg.] *Last of several occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…Trace  DEPARTURE……-0.14
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.79  DEPARTURE……-2.07
ASOS…………..0.74
TOTAL PRECIPITATION FOR THE YEAR……….22.48  DEPARTURE……-7.35
ASOS………….22.86

PRELIMINARY CLIMATE SUMMARY FOR JULY 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

7/1  84/67/76/+6/0.20/520/57                 32 S   AERO 35 S   RMY 34 TSTM
7/2  76/61/69/-1/0.00/811/91                 31 W   AERO 34 W   RMY 32
7/3  83/57/70/-1/0.00/766/84                 23 W   AERO 23 W   RMY 23
7/4  87/61/74/+3/0.00/847/93                 28 SSW AERO 28 SSW RMY 28
7/5  80/65/73/+2/0.29/309/34                 16 S   AERO 16 S   RMY N/A
7/6  92/68/80/+9/0.00/864/95                 22 WSW AERO 24 WSW RMY 22
7/7  77/61/69/-2/0.00/409/45                 21 NE  AERO 20 ENE RMY N/A
7/8  67/58/63/-9/0.02/000/00                 25 NE  AERO 25 NE  RMY 26
7/9  64/57/61/-11/0.09/000/00                20 NE  AERO 18 NE  RMY 17
7/10 66/56/61/-11/0.04/000/00                16 NE  AERO 16 NE  RMY 16
7/11 77/56/67/-5/0.00/415/46                 20 NNE AERO 21 NNE RMY 20
7/12 86/60/73/+1/0.00/848/94                 23 S   AERO 23 S   RMY 23
7/13 89/64/77/+5/0.00/874/97                 30 S   AERO 30 S   RMY 33
7/14 84/66/75/+3/0.01/…/..                 38 S   AERO 41 S   RMY 43
7/15 93/71/82/+10/0.00/…/..                23 W   AERO 23 W   RMY 23
7/16 93/69/81/+9/0.00/…/..                 25 WSW AERO 24 WSW RMY 24
7/17 83/72/78/+6/0.00/…/..                 18 ENE AERO 16 ENE RMY 19 TSTM
7/18 93/70/82/+10/0.05/…/..                41 WNW AERO 41 WNW RMY 43 TSTM
7/19 85/62/74/+2/0.00/…/..                 28 NW  AERO 28 NW  RMY 27
7/20 83/59/71/-1/0.00/…/..                 23 NW  AERO 23 NW* RMY 24
7/21 89/63/76/+4/0.00/…/..                 28 W   AERO 26 W   RMY N/A
7/22 96/70/83/+11/0.09/…/..                33 SW  AERO 35 SW  RMY 35 TSTM
7/23 95/68/82/+10/T/…/..                   45 NNW AERO 48 NNW RMY 44

7/24 Low temp since midnight is 64F; normal low is now 63F

DAILY RECORDS FOR JULY 2016
None so far.

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

RECORDS FOR JULY 24
HIGH 96F IN 1987
LOW 49F IN 1893,1912
PRECIP 2.27 INS IN 2008
PEAK GUST 46 MPH NE IN 2009

RECORDS FOR JULY 25
HIGH 94F IN 1963,1987
LOW 51F IN 1901,1953
PRECIP 2.25 INS IN 1990
PEAK GUST 88 MPH NW IN 1972

TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle