Wednesday, July 25, 2018

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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, JULY 25, 2018
ALL TIMES ARE IN EASTERN STANDARD TIME

ANOTHER HUMID DAY WITH SCATTERED SHOWERS…

Wind continues to be from the south leaving warm
wet air in the area. Humidity has been high again
today with dew points continuing to be in the 70’s.
Yesterday’s low temperature of 72F is 1 degree
above the daily high minimum record of 73F set in
1952. Today’s high temperature so far has been a
near seasonable 82F.
We have had multiple light scattered showers today
and we measured 0.01 ins of rainfall by 1:00 P.M.
The southerly wind remains moderate with frequent
gust over 22 kts (25 MPH) again today. So far we
have had a peak gust of 29 kts (33 MPH) by 1:00 P.M.

Today’s Observations:

7 A.M.
Weather: Light rain shower, broken stratocumulus, broken
stratus, few cumulus fractus WSW-WNW few towering cumulus NNE
Temperature: 76F; Dew Point: 71F; Wind: S at 10G20 kts
Sea-level pressure: 30.14 ins. Hg, falling, then more slowly
Visibility: 35 miles, distant fog in all directions
6-hr Max temp: 76F
6-hr Min temp: 72F
24-hr Precip: Trace
BHO SA 1155 E15 BKN E25 BKN 35RW- 208/76/71/1710G20/014/ FEW
CUFA WSW-WNW FEW TCU NNE PCPN VRY LGT DSNT FG ALQDS RW-B45E50/
8/600 56007 10076 20072

10 A.M.
Weather: Light drizzle, scattered nimbostratus,
broken stratocumulus, broken stratus, broken altocumulus,
broken cirrus, few towering cumulus SSW and NNW
Temperature: 79F; Dew Point: 71F; Wind: S at 14G22 kts,
Peak Wind: 26 kts (30 MPH) at 9:30 A.M.
Sea-level pressure: 30.11 ins. Hg, falling steadily
Visibility: 25 miles, distant fog in all directions
3-hr Precip: Trace
BHO SA 1455 14 SCT 23 BKN E32 BKN 65 BKN 300 BKN 25L-
198/79/71/1814G22/011/ FEW TCU SSW AND NNW DSNT FG ALQDS
L-B40E59 PK WND 1926/30/ 8/662 56010 MANUAL 600//

1 P.M.
Weather: Broken stratocumulus, broken stratus, broken
cirrus, few towering cumulus NNE and E
Temperature: 80F; Dew Point: 71F; Wind: S at 17G28 kts,
Peak Wind: 29 kts (33 MPH) S at 12:32 P.M.
Sea-level pressure: 30.06 ins. Hg, falling, then more slowly
Visibility: 25 miles, distant fog in all directions
6-hr Max temp: 82F
6-hr Min temp: 76F
6-hr precip: 0.01 ins.
BHO SA 1755 E25 BKN 45 BKN 250 BKN 25L- 179/80/71/1917G28/006/
FEW TCU NNE AND E DSNT FG ALQDS L-B25E30B40E55 PK WND 1929/32/
56019 8/602 MANUAL 6001/ ASOS 60001 10082 20076

SUMMARY FOR TUESDAY, JULY 24, 2018

TEMPERATURE (DEGREES F)
MAX…..85   NORMAL…..81
MIN…..72   NORMAL…..63
MEAN….79   NORMAL…..72

DEPARTURE FROM 30-YEAR NORMAL…………………….+7
TOTAL DEPARTURE FOR THE MONTH……………………+58 [+2.2 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..14   DEPARTURE……….+6
TOTAL COOLING UNITS FOR THE MONTH………….217   DEPARTURE………+48
TOTAL COOLING UNITS FOR THE SEASON…………376   DEPARTURE………+78
TOTAL COOLING UNITS LAST SEASON TO DATE…….401   DEPARTURE………-25

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..31 S AT 3:39 P.M.
AERO…………………….29 S AT 3:39 P.M.
ASOS…………………….30 S AT 5:44 P.M.
DAVIS……………………31 S AT 2:33 P.M. RMY 29
FASTEST MILE FOR YESTERDAY………………….21 S AT 3:39 P.M.*
MAXIMUM 2-MINUTE ASOS AVERAGE……………….21 S AT 3:02 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………21 S AT 3:48 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..13.3 S
ASOS…………………..12.7
DAVIS………………….12.6 S  [182 deg.] *LAST OF MULTIPLE 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……….3.03  DEPARTURE……+0.04
ASOS…………..3.06
TOTAL PRECIPITATION FOR THE YEAR……….33.20  DEPARTURE……+3.42
ASOS………….34.79

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

7/01 94/72/83/+13/0.00/667/73       21 ESE AERO 18 ESE RMY 19
7/02 90/68/79/+9/0.00/858/94        21 S   AERO 21 S   RMY 22
7/03 94/69/82/+11/0.00/657/72       20 SSW AERO 18 SW  RMY 19 TSTM
7/04 89/73/81/+10/0.00/884/97       17 NE  AERO 15 NE  RMY 16
7/05 91/73/82/+11/0.00/865/95       29 SSW AERO 28 SSW RMY N/A
7/06 80/59/70/-1/0.56/018/02        37 NNW AERO 38 SW  RMY 40 TSTM
7/07 78/54/66/-5/0.00/900/99        22 N   AERO 18 N   RMY N/A
7/08 83/57/70/-2/0.00/890/98        23 S   AERO 21 S   RMY 22
7/09 88/60/74/+2/0.00/852/94        23 SW  AERO 23 SW  RMY 24
7/10 91/63/77/+5/0.10/751/83        24 W   AERO 22 W   RMY N/A
7/11 73/62/68/-4/0.63/705/78        28 NE  AERO 25 NE  RMY 27 TSTM
7/12 77/56/67/-5/0.00/867/96        16 NW  AERO 15 NW  RMY N/A
7/13 84/61/73/+1/0.00/568/63        23 SSE AERO 23 SSE RMY 24
7/14 80/61/71/-1/0.00/540/60        18 S   AERO 16 S   RMY 19
7/15 84/65/75/+3/T/521/58           16 S   AERO 15 S   RMY 14
7/16 83/67/75/+3/0.00/682/76        23 S   AERO 23 S   RMY 23
7/17 88/67/78/+6/1.34/430/48        31 SW  AERO 30 SW  RMY 32 TSTM
7/18 81/63/72/0/0.02/769/86         21 NW  AERO 22 NW  RMY 23
7/19 80/56/68/-4/0.00/…/..        21 S   AERO 17 SSE RMY 19
7/20 83/62/73/1/0.00/…/..         21 SE  AERO 17 ESE RMY 19
7/21 76/59/68/-4/…./…/..        23 ENE AERO 20 ENE RMY N/A
7/22 76/63/69/-3/…./…/..        29 ESE AERO 28 ESE RMY N/A
7/23 82/71/77/+5/…./…/..        32 S   AERO 30 S   RMY 32
7/24 85/72/79/+7/T/…/..           31 S   AERO 29 S   RMY 29

7/25 Low temp since midnight is 72F; normal low is now 63F

DAILY RECORDS FOR JULY 2018

07/01/18: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 72F,
TIES PREVIOUS RECORD OF 72F SET IN 1968

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

RECORDS FOR JULY 25
HIGH 96F IN 2016
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: Kaitlin Geagan