Monday, July 26, 2021
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
MONDAY, JULY 26, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0431E
SUNSET: 1910E
WARMER AND HUMID TODAY WITH PLENTY OF SUNSHINE….
After the cool weekend, today has returned to weather
more typical for July. Plenty of sun has been observed
today mixed with some high thin cirrus and a few cumulus
this afternoon. Smoke from the western U.S. wildfires
has overspread the region this afternoon, currently
dimming the sun. An odor of smoke can also be detected
in the air.
A westerly breeze has helped to push the temperatures
into the upper 80s and low 90s across the region. This
west wind has also helped mix out some of the low level
moisture with the dew point dropping from the upper 60s
this morning to the low 60s this afternoon.
The high so far today is 87F, 5 degrees above the daily
normal maximum of 82F. The low so far today is 67F, which
is 3 degrees above the daily normal minimum of 64F.
———————————————–
Today’s Observations:
7 A.M.
Weather: Clear, few cirrus distant SE-SW
Temperature: 69F; Dew Point: 68F; Relative Humidity: 97%
Wind: W @ 9 kts
Sea-level pressure: 29.89 in. Hg; rising, then more slowly
Visibility: 7 miles, thin fog
6-hr Max temp: 69F
6-hr Min temp: 67F
24-hr Precip: 0.07 ins.
BHO SA 1155 CLR 7 121/69/68/2709/989/ FEW CI DSNT SE-SW
THN F ALQDS/ 8/001 51012 6001/ 70007 10069 20067
10 A.M.
Weather: Clear, few cirrus distant SE-SW
Temperature: 82F; Dew Point: 66F; Relative Humidity: 59%
Wind: WSW @ 4 kts, wind light
Sea-level pressure: 29.89 in Hg; steady
Visibility: 12 miles, hazy
3-hr Precip: 0.00 ins.
BHO SA 1455 CLR 12 121/82/66/2504/989/ FEW CI DSNT SE-SW
HAZY WND LGT/ 8/001 54000
1 P.M.
Weather: Thin scattered cirrus, few cumulus all quadrants
Temperature: 86F, Dew point: 63F; Relative Humidity: 47%
Wind: W @ 10G17 kts
Sea-level pressure: 29.86 in Hg; falling, then more rapidly
Visibility: 12 miles, hazy
6-hr Max temp: 87F
6-hr Min temp: 69F
6-hr Precip: 0.00 ins.
BHO SA 1755 250 -SCT 12 111/86/63/2710G17/986/ FEW CU ALQDS
HAZY/ 8/201 58010 10087 20069
SUMMARY FOR SUNDAY, JULY 25, 2021
TEMPERATURE (DEGREES F)
MAX…….71 NORMAL…..82
MIN…….64 NORMAL…..64
MEAN……68 NORMAL…..73
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….-5
TOTAL DEPARTURE FOR THE MONTH…………………-95 [-4.0 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY…………….0 DEPARTURE…….. 0
TOTAL HEATING UNITS FOR THE MONTH……………26 DEPARTURE…….+20
TOTAL HEATING UNITS FOR THE SEASON…………..26 DEPARTURE…….+20
TOTAL HEATING UNITS LAST SEASON TO DATE……….1 DEPARTURE…….+25
COOLING DEGREE DAYS (SEASON: JAN 2021 THRU DEC 2021)
TOTAL COOLING UNITS FOR YESTERDAY…………….3 DEPARTURE……..-5
TOTAL COOLING UNITS FOR THE MONTH…………..121 DEPARTURE…….-77
TOTAL COOLING UNITS FOR THE SEASON………….347 DEPARTURE…….+10
TOTAL COOLING UNITS LAST SEASON TO DATE……..393 DEPARTURE…….-46
PEAK WIND GUST (MPH):
Official……………….40 SSW @ 10:18 A.M.
AEROVANE (south tower)…..41 SSW @ 10:17 A.M.
VECTOR #2 (south tower)….43 @ 10:17 A.M.
DAVIS #2 (south tower)…..37 SSW @ 10:18 A.M.
ASOS………..OUT OF SERVICE D/T RENOVATIONS
VECTOR #1……OUT OF SERVICE D/T RENOVATIONS
DAVIS #1…….OUT OF SERVICE D/T RENOVATIONS
RMY…………OUT OF SERVICE D/T RENOVATIONS
MERLIN………OUT OF SERVICE D/T RENOVATIONS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………28 SSW @ 10:31 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..29 @ 10:19 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………27 SSW @ 10:20 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE…….OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE…OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE..OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE RMY AVERAGE……..OUT OF SERVICE D/T RENOVATIONS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……14.3 SSW [343 total miles] VECTOR #2…………….14.8
DAVIS #2……………..14.4 SSW
RMY……………..OUT OF SERVICE D/T RENOVATIONS
ASOS…………….OUT OF SERVICE D/T RENOVATIONS
VECTOR #1………..OUT OF SERVICE D/T RENOVATIONS
DAVIS #1…………OUT OF SERVICE D/T RENOVATIONS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….0.07 DEPARTURE….-0.04
TOTAL PRECIPITATION FOR THE MONTH…………10.77 DEPARTURE….+8.00
TOTAL PRECIPITATION FOR THE YEAR………….34.15 DEPARTURE….+4.41
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
M: Missing data
07/01 80/65/73/+2/0.74/155/17 22 W AERO 20 WSW RMY 21
07/02 65/55/60/-11/1.49/000/00 37 NE AERO 36 NE RMY 39
07/03 56/54/55/-17/1.98/000/00 41 NE AERO 44 NE RMY 45 TSTM
07/04 66/54/60/-12/0.16/191/21 26 ENE AERO 23 ENE RMY 26
07/05 74/53/64/-8/0.01/546/60 26 SSW AERO 28 SSW RMY 27
07/06 87/66/77/+5/0.26/255/28 37 W AERO 48 W RMY 38 TSTM
07/07 88/88/77/+5/0.77/699/77 63 NW AERO 75 NW RMY 70 TSTM
07/08 67/59/63/-9/0.38/109/12 46 W AERO 46 W RMY 51 TSTM
07/09 73/62/68/-5/3.02/163/18 40 WNW AERO 44 WNW RMY 43
07/10 71/63/67/-6/0.07/109/12 23 NE AERO 21 NNE RMY 22
07/11 81/61/71/-2/T/325/36 21 SW AERO 19 S RMY N/A
07/12 67/61/64/-9/1.01/000/00 31 ENE AERO 31 ENE RMY N/A
07/13 66/60/63/-10/0.02/000/00 19 E AERO 18 E RMY N/A
07/14 80/62/71/-2/0.01/…/.. 19 S AERO 18 S RMY N/A
07/15 88/67/78/+5/0.00/…/.. 19 WSW AERO 18 SSW RMY N/A
07/16 90/70/80/+7/0.04/…/.. 36 NNW AERO 39 NNW RMY N/A TSTM
07/17 78/64/71/-2/0.34/…/.. 26 ENE AERO 25 ENE RMY N/A TSTM
07/18 74/63/69/-4/0.15/…/.. 22 NE AERO 22 NE RMY N/A TSTM
07/19 71/63/67/-6/0.07/…/.. 17 ENE AERO 17 ENE RMY N/A
07/20 83/64/74/+1/0.00/…/.. 23 NW AERO 23 NW RMY N/A
07/21 79/62/71/-2/0.16/…/.. 26 NNW AERO 23 NNW RMY N/A TSTM
07/22 79/58/69/-4/T/…/.. 20 WNW AERO 20 WNW RMY N/A
07/23 79/62/71/-2/0.00/…/.. 22 S AERO 21 S RMY N/A TSTM
07/24 78/59/69/-4/0.00/…/.. 19 S AERO 18 S RMY N/A
07/25 71/64/68/-5/0.08/…/.. 40 SSW AERO 41 SSW RMY N/A
07/26 The low since midnight is 67F, the daily normal low is 64F
RECORDS FOR JULY:
JULY 2: Record daily precipitation of 1.49″,
Surpasses previous record of 1.42″ set in 1986
JULY 3: Record daily precipitation of 1.98″,
Surpasses previous record of 1.36″ set in 1985
JULY 7: Record peak gust of 63 MPH,
Surpasses previous record of 55 MPH set in 1989
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR JULY 26
HIGH 97F IN 1963
LOW 47F IN 1920
PRE 2.05 INS IN 1899
WIND 74e MPH NNW IN 1940
RECORDS FOR JULY 27
HIGH 95F IN 1949, 1963
LOW 50F IN 1920, 2001
PRECIP 4.01 INS IN 1979
WIND 47 MPH ENE IN 1984
TODAY’S REPORT PREPARED BY: Matt Douglas
