Wednesday, July 22, 2015
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, JULY 22, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME
HEAT STREAK ENDS OVERNIGHT, TEMPS DIP TO SEASONAL
TEMPERATURES UNDER CLEAR SKIES
Yesterday’s heat and humidity peaked to a maximum
temperature in the afternoon at 87F under clearing skies.
Clouds moved in during the evening, with light showers beginning
after 7:00 PM EST and ending before midnight. Only a trace
of new rain was recorded.
Overnight skies cleared and temperatures dipped to a low
reading of 64F. Clear skies this morning with dry conditions
have allowed for visibilities today of 80 miles in all
directions. By the 1:00 PM EST observation visibility
had dropped somewhat, to a still quite clear 70 miles.
A maximum temperature of 82F had been recorded.
Today’s Observations:
7 A.M.
Weather: Clear, few altocumulus distant offshore ESE-SE,
few cumulus distant WNW
Temperature: 70F; Dew Point: 59F; Wind: NW at 9 kts
Sea-level pressure: 29.66 ins. Hg, rising, then more quickly
Visibility: 80 miles
6-hr Max temp: 70F
6-hr Min temp: 64F
24-hr precip: Trace
BHO SA 1155 CLR 80 045/70/59/3109/966/ FEW ACC DSNT ESE-SE
FEW CU DSNT WNW/ 8/180 53013 10070 20064
10 A.M.
Weather: Clear, few cumulus distant SE and SW-NNW
Temperature: 74F; Dew Point 55F; Wind: NNW at 9 kts
Sea-level pressure: 29.69 ins. Hg, rising, then more slowly
Visibility: 80 miles
BHO SA 1455 CLR 80 053/74/55/3309/969/ FEW CU DSNT SE AND SW-NNW/
8/100 51008
1 P.M.
Weather: Scattered cumulus
Temperature: 81F; Dew Point: 52F; Wind: WNW at 11G20 kts,
Sea-level pressure: 29.68 ins. Hg, rising, then falling and lower
Visibility: 70 miles
6-hr Max temp: 82F
6-hr Min temp: 70F
BHO SA 1755 65 SCT 70 052/81/52/3011G20/968/ 8/100 58001 10082 20070
SUMMARY FOR TUESDAY, JULY 20, 2015
TEMPERATURE (DEGREES F)
MAX…..87 NORMAL…..81
MIN…..70 NORMAL…..63
MEAN….79 NORMAL…..72
DEPARTURE FROM 30-YEAR NORMAL……………………+7
TOTAL DEPARTURE FOR THE MONTH…………………..+23 [+1.0 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..14 DEPARTURE……….+6
TOTAL COOLING UNITS FOR THE MONTH………….161 DEPARTURE………+16
TOTAL COOLING UNITS FOR THE SEASON…………299 DEPARTURE………+25
TOTAL COOLING UNITS LAST SEASON TO DATE…….274 DIFFERENCE……..+28
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….24 W AT 8:34 P.M.
ASOS……………………26 W AT 8:34 P.M.
DAVIS…………………..23 W AT 8:31 P.M. RMY 25
FASTEST MILE FOR YESTERDAY…………………19 W AT 9:03 P.M.*
MAXIMUM 2-MINUTE ASOS AVERAGE………………20 W AT 9:07 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..18 W AT 8:35 P.M.
AVERAGE WIND SPEED AND DIRECTION……………7.3 WNW
ASOS……………………8.0
DAVIS…………………..6.1 W [267 deg.]
* Last of several occurrences…
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….TRACE DEPARTURE…..-0.13
ASOS……………0.00
TOTAL PRECIPITATION FOR THE MONTH………..2.99 DEPARTURE…..+0.40
ASOS……………3.01
TOTAL PRECIPITATION FOR THE YEAR………..27.26 DEPARTURE…..-2.30
ASOS……………N/A ***
*** ASOS annual total not available due to erroneous readings
PRELIMINARY CLIMATE SUMMARY FOR JULY CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/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
7/1 80/63/72/+2/0.59/466/51 30 SSE RMY 33 TSTM
7/2 78/60/69/-1/0.00/721/79 23 WNW RMY N/A
7/3 79/58/69/-2/0.00/867/95 17 SSW RMY 17
7/4 74/61/68/-3/T/109/12 16 S RMY N/A
7/5 82/58/70/-1/0.00/865/95 20 WSW RMY 20
7/6 85/64/75/+4/0.00/755/83 20 S RMY 21
7/7 84/65/75/+4/0.02/445/49 35 S RMY 40
7/8 87/68/78/+6/T/372/41 23 NE RMY N/A
7/9 73/61/67/-5/…./390/43 24 NE RMY 25
7/10 80/59/70/-2/…./535/59 18 W RMY N/A TSTM
7/11 84/61/73/+1/0.00/868/96 21 NW RMY 19
7/12 88/67/78/+6/0.00/813/90 20 W RMY 17
7/13 82/66/74/+2/0.00/424/47 21 E RMY 20
7/14 81/64/73/+1/…./396/44 25 S RMY 27
7/15 84/61/73/+1/…./…/.. 24 ENE RMY 26
7/16 72/56/64/-8/0.00/…/.. 25 NNE RMY 24
7/17 79/56/68/-4/0.00/…/.. 21 S RMY N/A
7/18 76/63/70/-2/0.16/…/.. 29 SSW RMY 30 TSTM
7/19 89/68/79/+7/0.01/…/.. 25 SSW RMY 27
7/20 90/73/82/+10/0.00/…/.. 24 W RMY 26
7/21 87/70/79/+7/T/…/.. 24 W RMY 25
7/22 low since midnight is 64F; normal low is now 63F
DAILY RECORDS FOR JULY 2015
7/10- NEW RECORD DAILY PRECIPITATION PENDING OF X.XX in 2015
surpasses previous record of 1.68 in. in 1933
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR JULY 22
HIGH 99F IN 1926, 2011
LOW 52F IN 1890
PRECIP 1.73 INS IN 1900
PEAK GUST 55 MPH IN 1983
RECORDS FOR JULY 23
HIGH 99F IN 1952
LOW 51F IN 1923,1977
PRECIP 1.82 INS IN 1953
PEAK GUST 54e MPH S IN 1946
TODAY’S REPORT PREPARED BY: Brian Fitzgerald
