Saturday, July 30, 2022

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

SATURDAY, JULY 30, 2022
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0435E
SUNSET:  1906E

AN INCREDIBLE WEATHER DAY ALMOST FEELING SPRINGLIKE IN
COMPARISON TO DAYS PRIOR….

We measured 0.03 inches this morning, giving us a
2-day rainfall streak!  Skies today were partly cloudy
while visibility was amazing at 85 miles on average.
We had a cool breeze from the northwest, increasing in
significance as the day went on. Speeds were almost
15 mph on average with frequent gusts around 25 mph.

Weather conditions were comfortable with dew points
diving into the low 50’s. Another exceptional day for
July!

The yearly rain deficit has now reached 9.27″ below normal!
Most of the area, including the Greater Boston Area and points
north and northwest out to Worcester are under a severe drought.

With only 0.80″ of rain for the month of July so far, we decided
to take a look at the driest July on record here at Blue Hill.
Here is the list. If the month ended today, this year would
rank 4th on the list.

BHO Lowest July Precipitation, inches (1885-2021):

1. 0.13 in 1953
2. 0.33 in 1957
3. 0.72 in 1968
4. 0.85 in 1917
5. 0.87 in 1937
6. 0.92 in 1965
7. 1.08 in 1939
8. 1.11 in 1983
9. 1.13 in 1970
10. 1.14 in 1946

The stats above were compiled by our Chief Scientist Mike Iacono.

Drought section written by Assistant Chief Observer,
the one and only Matthew Douglas!!!!

The high so far today is 86F, which is 4 degrees above the
normal maximum of 82F. The low since midnight is 69F, which
is 5 degrees above the normal minimum of 64F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Broken altocumulus
Temperature: 73F; Dew Point: 59F; Relative Humidity: 61%
Wind: NNW @ 4 kts, wind light and variable
Sea-level pressure: 1013.9 mb; 29.94 in. Hg: rising unsteadily
Visibility: 85 miles
6-hr Max temp: 73F
6-hr Min temp: 69F
24-hr Precip: 0.03 ins.
BHO SA 1155 90 BKN 85 139/73/59/3404/994/ WND L/V/ 8/070
52018 70003 10073 20069

10 A.M.
Weather: Clear, few small cumulus
Temperature: 83F; Dew Point: 52F; Relative Humidity: 34%
Wind: WNW @ 13G24 kts
Sea-level pressure: 1014.2 mb; 29.95 in Hg: Rising, then falling
Visibility: 85 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 CLR 85 142/83/52/3013G24/995/ FEW SML CU ALQDS/
8/100 50003

1 P.M.
Weather: Broken cumulus
Temperature: 83F, Dew point: 54F; Relative Humidity: 37%
Wind: NNW @ 13G23 kts
Sea-level pressure: 1013.4 mb; 29.92 in Hg: rising then more
slowly
Visibility: 85 miles
6-hr Max temp: 86F
6-hr Min temp: 73F
6-hr Precip: 0.00 ins.
BHO SA 1755 50 BKN 85 134/83/54/3413G23/992/ 8/200 51008
10086 20073

————————————————————–

SUMMARY FOR FRIDAY, JULY 29, 2022

TEMPERATURE (DEGREES F)
MAX…….91   NORMAL…..82
MIN…….70   NORMAL…..64
MEAN……81   NORMAL…..73

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……..+8
TOTAL DEPARTURE FOR THE MONTH……………….+105 [+3.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY…………….0  DEPARTURE………0
TOTAL HEATING UNITS FOR THE MONTH…………….0  DEPARTURE……..-7
TOTAL HEATING UNITS FOR THE SEASON……………0  DEPARTURE……..-7
TOTAL HEATING UNITS LAST SEASON TO DATE………26  DEPARTURE…….-26

COOLING DEGREE DAYS (SEASON: JAN 2022 THRU DEC 2022)
TOTAL COOLING UNITS FOR YESTERDAY……………16  DEPARTURE……..+8
TOTAL COOLING UNITS FOR THE MONTH…………..327  DEPARTURE…….+96
TOTAL COOLING UNITS FOR THE SEASON………….482  DEPARTURE……+112
TOTAL COOLING UNITS LAST SEASON TO DATE……..376  DEPARTURE……+106

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….34 WSW @  1:25 P.M.
AEROVANE……………….N/A
VECTOR #2 (Instantaneous)..39     @  1:25 P.M.
DAVIS #2 ………………33 WSW @  1:25 P.M.
RMY #2 (Instantaneous)…..38 WSW @  1:25 P.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 #1………OUT OF SERVICE D/T RENOVATIONS
MERLIN………OUT OF SERVICE D/T RENOVATIONS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………20 WSW @  1:25 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..20     @  1:15 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………20 WSW @  6:23 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..20 WSW @  1:25 P.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 #1 AVERAGE……OUT OF SERVICE D/T RENOVATIONS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..10.8 SSW [258 total miles] VECTOR #2………………11.5
DAVIS #2……………….11.6 W
RMY #2…………………11.4 W
RMY #1……….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……..0.03 DEPARTURE…..-0.09
TOTAL PRECIPITATION FOR THE MONTH…………..0.80 DEPARTURE…..-2.43
TOTAL PRECIPITATION FOR THE YEAR…………..21.19 DEPARTURE…..-9.27

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

7/1   90/63/77/+6/0.00/704/77             33 S   AERO N/A    RMY 34
7/2   83/67/75/+4/0.25/228/25             25 WSW AERO N/A    RMY 26 TSTM
7/3   84/65/75/+3/0.00/547/60             25 WNW AERO N/A    RMY 26
7/4   83/60/72/0/0.00/838/92              25 WNW AERO N/A    RMY 26
7/5   73/63/68/-4/0.12/027/03             37 SSW AERO N/A    RMY 39
7/6   83/64/74/+2/T/701/77                37 SSW AERO N/A    RMY 38
7/7   79/62/71/-1/0.00/645/71             27 SSW AERO N/A    RMY 29
7/8   85/60/73/+1/0.00/472/52             24 WSW AERO N/A    RMY 24
7/9   79/63/71/-2/0.00/843/93             21 N   AERO N/A    RMY 22
7/10  81/57/69/-4/0.00/851/94             22 SSE AERO N/A    RMY 24
7/11  86/60/73/0/0.00/849/94              31 SSW AERO N/A    RMY 33
7/12  86/63/75/+2/T/713/79                38 SSW AERO N/A    RMY 39
7/13  89/67/78/+5/0.00/820/91             22 WNW AERO N/A    RMY 22
7/14  86/64/75/+2/0.14/675/75             26 WNW AERO N/A    RMY 27
7/15  85/61/73/0/0.00/862/96              21 S   AERO N/A    RMY 22
7/16  84/63/74/+1/0.00/439/49             25 SSW AERO N/A    RMY 26
7/17  89/65/77/+4/0.00/662/74             31 SSW AERO N/A    RMY 33 TSTM
7/18  80/68/74/+1/0.22/009/01             35 SSW AERO N/A    RMY 36
7/19  91/70/81/+8/T/714/80                37 WNW AERO N/A    RMY 38
7/20  96/72/84/+11/0.00/801/90            23 WNW AERO N/A    RMY 23
7/21  92/71/82/+9/0.00/693/78             39 SSW AERO N/A    RMY 41
7/22  94/72/83/+10/0.00/834/94            25 W   AERO N/A    RMY 25
7/23  96/72/84/+11/0.00/850/96            22 W   AERO N/A    RMY 22
7/24  99/73/86/+13/0.00/830/94            39 SW  AERO N/A    RMY 41
7/25  88/74/81/+8/T/291/33                37 SW  AERO N/A    RMY 41
7/26  83/66/75/+2/0.00/…/..             24 W   AERO N/A    RMY 25
7/27  86/61/74/+1/0.00/…/..             21 NW  AERO N/A    RMY 20
7/28  87/67/77/+4/0.04/…/..             35 SSW AERO N/A    RMY 39
7/29  91/70/81/+8/…./…/..             34 WSW AERO N/A    RMY 38

7/30  The low since midnight is 69F, the daily normal low is 64F

DAILY RECORDS

07/24/2022: NEW HIGH MAXIMUM TEMPERATURE RECORD OF 99F,
PREVIOUS RECORD WAS 96F SET IN 1987.

07/24/2022: TIED RECORD HIGH MINIMUM OF 73F, ALSO SET IN 1952

07/25/2022: TIED RECORD HIGH MINIMUM OF 74F, ALSO SET IN 2001

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

RECORDS FOR JULY 30
HIGH 99F IN 1949
LOW 51F IN 1956
PRECIP 1.84 INS IN 1976
PEAK GUST 70e MPH SW 1944

RECORDS FOR JULY 31
HIGH 95F IN 1917
LOW 50F IN 1895
PRECIP 1.34 INS IN 1892
PEAK GUST 43e MPH WNW SW IN 1953, 43 SW IN 1971

TODAY’S REPORT PREPARED BY: Benjamin Turner