Monday, July 27, 2020
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
MONDAY, JULY 27, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME
HOT AND HUMID WITH NEAR RECORD HIGH TEMPERATURE…
The heat dome that’s been building over the northeast
is peaking today and tomorrow. The temperature so far
today has reached 93 degrees here on the summit. The
record high for today is 95 degrees set in 1949 and 1963.
In addition to the high heat, humidity levels have
remained on the high side with dew points in the mid
60s. This is yielding heat indices in the upper 90s!
A steady westerly wind is once again blowing today,
helping to maximize the heat across eastern southern
New England.
The high so far today is 93 degrees. This is 12 degrees
above the daily normal high of 81F. The low since
midnight is 72F, which is 9 degrees above the daily
normal low of 63F
Today’s Observations:
7 A.M.
Weather: Scattered Altocumulus, scattered Cirrostratus,
thin broken Cirrus
Temperature: 77F; Dew Point: 65F; Relative Humidity: 67%
Wind: W at 13 kts
Sea-level pressure: 29.81 ins. Hg: falling, then more slowly
Visibility: 35 miles, hazy
6-hr Max temp: 77F
6-hr Min temp: 72F
24-hr Precip: 0.00 ins.
BHO SA 1155 140 SCT 200 SCT 250 –BKN 35 096/77/65/2613/981/
HAZY/ 8/082 51005 10077 20072
10 A.M.
Weather: Thin broken Cirrus, few Altocumulus distant NW-NE
Temperature: 87F; Dew Point: 67F; Relative Humidity: 52%
Wind: W at 8 kts
Sea-level pressure: 29.79 ins. Hg: falling, then more rapidly
Visibility: 30 miles, hazy
3-hr Precip: 0.00 ins.
BHO SA 1455 250 –BKN 30 088/87/67/2708/979/
FEW AC DSNT NW-NE HAZY/ 8/071 58008
1 P.M.
Weather: Thin broken Cirrus, few small cumulus all quadrants
Temperature: 93F; Dew Point: 65F; Relative Humidity: 40%
Wind: W at 9G16 kts
Sea-level pressure: 29.76 ins. Hg: falling, then more rapidly
Visibility: 30 miles, hazy
6-hr Max temp: 93F
6-hr Min temp: 77F
6-hr Precip: 0.00 ins.
BHO SA 1755 250 –BKN 30 078/93/65/2609G16/976/
FEW SML CU ALQDS HAZY/ 8/101 58010 10093 20077
SUMMARY FOR SUNDAY, JULY 26, 2020
TEMPERATURE (DEGREES F)
MAX…..89 NORMAL…..81
MIN…..70 NORMAL…..63
MEAN….80 NORMAL…..72
DEPARTURE FROM 30-YEAR NORMAL…………….. +8
TOTAL DEPARTURE FOR THE MONTH……………..+60 [+2.1 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………..15 DEPARTURE……. +7
TOTAL COOLING UNITS FOR THE MONTH…………….224 DEPARTURE…….+39
TOTAL COOLING UNITS FOR THE SEASON……………408 DEPARTURE…….+94
TOTAL COOLING UNITS LAST SEASON TO DATE……….344 DEPARTURE…….+64
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..27 W AT 2:04 P.M.
AERO…………………….28 W AT 1:25 P.M.
ASOS…………………….28 W AT 2:05 P.M.
DAVIS……………………29 W AT 9:35 A.M
RMY 28 MERLIN 27
FASTEST MILE FOR YESTERDAY………………….22 W AT 2:35 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….21 W AT 2:35 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………22 W AT 2:34 P.M.
AVERAGE WIND SPEED AND DIRECTION……………12.8 W
ASOS……………………12.7
DAVIS…………………..13.3 W [264 deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00 DEPARTURE……-0.15
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….1.71 DEPARTURE……-1.58
ASOS…………..1.79
TOTAL PRECIPITATION FOR THE YEAR……….29.06 DEPARTURE……-1.20
ASOS………….29.80
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 76/63/70/0/0.00/228/25 16 E AERO 14 E RMY 14 TSTM
07/02 86/61/74/4/0.00/803/88 30 WSW AERO 25 WSW RMY 33
07/03 73/60/67/-4/0.00/091/10 30 NE AERO 28 NE RMY 30
07/04 79/60/70/-1/0.00/565/62 16 S AERO 16 S RMY 16
07/05 83/63/73/+2/0.54/373/41 24 NW AERO 30 NW RMY 26 TSTM
07/06 73/60/67/-4/0.00/482/53 20 ENE AERO 16 NNE RMY 18
07/07 78/60/69/-2/0.00/454/50 25 S AERO 25 S RMY 26
07/08 83/64/74/+2/0.00/227/25 32 SSW AERO 32 SSW RMY 32
07/09 89/70/80/+8/0.00/834/92 24 S AERO 23 S RMY 22
07/10 83/70/77/+5/0.05/109/12 30 SSE AERO 32 SSE RMY N/A
07/11 85/70/78/+6/0.00/614/68 39 S AERO 39 S RMY 38
07/12 86/70/78/+6/0.00/830/92 28 WSW AERO 28 WSW RMY 29
07/13 82/69/76/+4/0.23/306/34 30 SSE AERO 31 SSE RMY 30 TSTM
07/14 78/63/71/-1/0.00/369/41 26 ENE AERO 25 ENE RMY 26
07/15 72/59/66/-6/0.00/539/60 21 NE AERO 21 NE RMY N/A
07/16 73/57/65/-7/0.00/815/91 21 E AERO 21 E RMY 19
07/17 71/57/64/-8/0.19/027/03 24 SSW AERO 24 SSW RMY 25
07/18 89/66/78/+6/0.00/822/92 18 W AERO 17 W RMY 19
07/19 92/69/81/+9/0.00/…/.. 28 S AERO 28 S RMY 26
07/20 91/72/82/+10/T/…/.. 25 SSW AERO 25 SSW RMY N/A
07/21 88/68/78/+6/0.00/…/.. 25 W AERO 25 W RMY 24
07/22 80/67/74/+2/…./…/.. 16 ENE AERO M M RMY 16
07/23 88/68/78/+6/0.48/…/.. 31 N AERO 32 N RMY 31
07/24 81/68/75/+3/0.00/…/.. 15 ENE AERO 15 ENE RMY 16
07/25 88/67/78/+6/0.00/…/.. 18 W AERO 18 WNW RMY N/A
07/26 89/70/80/+8/0.00/…/.. 27 W AERO 28 W RMY 27
07/27 The low since midnight is 72F, the daily normal low is 63F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR JULY 27
HIGH 95F IN 1949, 1963
LOW 50F IN 1920, 2001
PRE 4.01 INS IN 1979
WIND 47 MPH ENE IN 1984
RECORDS FOR JULY 28
HIGH 97F IN 1931
LOW 49F IN 1903
PRECIP 3.32 INS IN 1911
PEAK GUST 62 MPH SW IN 2006
TODAY’S REPORT PREPARED BY: Matt Douglas
