Monday, July 25, 2016

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, JULY 25, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME

MODERATE CUMULUS FORMING,
HIGH TEMPERATURE RECORD BROKEN BY EARLY AFTERNOON

A new record temperature of 96F occurred today by the 1:00PM EST
observation.  The previous maximum temperature of 94F for July 25
was set in 1963 and 1987.  This is the 8th day in July with a
temperature above 90F and the 4th day in a row of 90F+ temperatures.

Cumulus clouds began forming in the late morning and were quite
developed at the 1:00PM obs.  Wind speeds were also increasing
in the early afternoon and maintained a SE-SW direction.

Today’s Observations:

7 A.M.
Weather: Scattered cirrocumulus
Temperature: 74F; Dew Point: 60F; Wind: SE at 5 kts,
Wind Speed: Light
Sea-level pressure: 29.96 ins. Hg, rising, then falling
Visibility: 40 miles, distant haze
6-hr Max temp:75F
6-hr Min temp: 70F
24-hr precip: 0.00 in.
BHO SA 1155 SCT 180 40 145/74/60/1405/996/ DSNT HZ WND LGT/ 8/009 53002
10075 20070

10 A.M.
Weather: Few cumulus NE-SSW, scattered cirrus
Temperature: 89F; Dew Point: 69F; Wind: SW at 6 kts,
Wind Speed: Light
Wind Direction: Variable S-W
Sea-level pressure: 29.92 ins. Hg, falling, then more slowly
Visibility: 25 miles, hazy
BHO SA 1455 SCT 250 25 132/89/69/2306/992/ FEW CU NE-SSW HAZY WND 19V26/
8/102 55013

1 P.M.
Weather: Scattered cumulus, moderate cumulus E, broken cirrus
Temperature: 93F; Dew Point: 68F; Wind: SW at 13G19 kts
Sea-level pressure: 29.87 ins. Hg, falling, then more slowly
Visibility: 20 miles, hazy
6-hr Max temp: 96F
6-hr Min temp: 74F
BHO SA 1755 42 SCT E250 BKN 20 115/93/68/2313G19/987/ MDT CU E HAZY/
8/202 56017 10096 20074

SUMMARY FOR SUNDAY, JULY 24, 2016

TEMPERATURE (DEGREES F)
MAX…..91   NORMAL…..81
MIN…..64   NORMAL…..63
MEAN….78   NORMAL…..72

DEPARTURE FROM 30-YEAR NORMAL…………………….+6
TOTAL DEPARTURE FOR THE MONTH……………………+56 [+2.1 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..13   DEPARTURE……….+5
TOTAL COOLING UNITS FOR THE MONTH………….225   DEPARTURE………+56
TOTAL COOLING UNITS FOR THE SEASON…………382   DEPARTURE………+84
TOTAL COOLING UNITS LAST SEASON TO DATE…….320   DIFFERENCE……..+62

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….20  WNW  AT  2:06 P.M.
AEROVANE………………..20  W    AT  1:17 P.M.*
ASOS……………………20  NW   AT  1:21 A.M.
DAVIS…………………..19  WSW  AT 10:34 A.M.  RMY 20
FASTEST MILE FOR YESTERDAY…………………15  NW   AT  1:21 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………15  W    AT  1:31 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..13  W    AT  1:31 P.M.
AVERAGE WIND SPEED AND DIRECTION……………8.1 NW
ASOS……………………8.1
DAVIS…………………..7.0 WNW [300 Deg.] *Last of several occurrences

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……….0.79  DEPARTURE……-2.20
ASOS…………..0.74
TOTAL PRECIPITATION FOR THE YEAR……….22.48  DEPARTURE……-7.48
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 91/64/78/+6/0.00/…/..                 20 WNW AERO 20 W*  RMY 20

7/25 Low temp since midnight is 70F; 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 25
HIGH 94F IN 1963,1987
LOW 51F IN 1901,1953
PRECIP 2.25 INS IN 1990
PEAK GUST 88 MPH NW IN 1972

RECORDS FOR JULY 26
HIGH 97F IN 1963
LOW 47F IN 1920
PRE 2.05 INS IN 1899
WIND 74e MPH NNW IN 1940

TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle and Lizzy Suzedell