Monday, February 24, 2020

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, FEBRUARY 24, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

SPRING-LIKE WARMTH ONCE AGAIN UNDER SUNNY SKIES….

Today we continue to experience milder weather, with
mainly clear skies other than a few high thin cirrus
cruising overhead.

The temperature has reached 60 degrees here early this
afternoon, however the air is very dry with a dew point of
19 degrees. This is yielding a relative humidity of only 20%.

Visibility, which was limited all morning, has finally
climbed to a respectable 60 miles early this afternoon.

The high so far today is 60F degrees, this is 21 degrees
above the normal of 39F. The low since midnight is 32F,
11 degrees above the normal daily minimum of 21F.

Today’s Observations:

7 A.M.
Weather: Clear
Temperature: 35F; Dew Point: 23F; Relative Humidity: 61%
Wind: SSW at 13 kts
Sea-level pressure: 30.05 ins. Hg: falling then steady
Visibility: 40 miles, hazy
6-hr Max temp: 35F
6-hr Min temp: 32F
24-hr Precip:  0.00 ins.
24-hr Snowfall: 0.0 ins.
BHO SA 1155 CLR 40 176/35/23/2113/005/ THN K LYR BLW INVSN
ALQDS HAZY/ 8/000 56004 10035 20032

10 A.M.
Weather: Clear, few cirrus WNW-NNW
Temperature: 51F; Dew Point: 19F; Relative Humidity: 27%
Wind: SW at 10G16 kts
Sea-level pressure: 30.05 ins. Hg: rising, then falling
Visibility: 40 miles, hazy
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 CLR 40 177/51/19/2210G16/005/ FEW CI DSNT WNW-NNW
THN K LYR ALQDS HAZY/ 8/001 50001

1 P.M.
Weather: Thin scattered cirrus
Temperature: 60F; Dew Point: 19F; Relative Humidity: 20%
Wind: SSW at 13G22 kts
Sea-level pressure: 29.99 ins. Hg: falling, then more rapidly
Visibility: 60 miles
6-hr Max temp: 60F
6-hr Min temp: 35F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
BHO SA 1755 250 –SCT 60 156/60/19/2113G22/999/ 8/001 58021
10060 20035

SUMMARY FOR SUNDAY, FEBRUARY 23, 2020

TEMPERATURE (DEGREES F)
MAX…..53   NORMAL…..39
MIN…..30   NORMAL…..21
MEAN….42   NORMAL…..30

DEPARTURE FROM 30-YEAR NORMAL……………….+12
TOTAL DEPARTURE FOR THE MONTH………………+110 [+4.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………23  DEPARTURE…….-12
TOTAL HEATING UNITS FOR THE MONTH…………..752  DEPARTURE……-112
TOTAL HEATING UNITS FOR THE SEASON…………3981  DEPARTURE……-413
TOTAL HEATING UNITS LAST SEASON TO DATE…….4289  DEPARTURE……-308

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..21 SW  AT  2:34 P.M.
AERO…………………….22 WSW AT  1:20 P.M.
ASOS…………………….23 SW  AT  2:34 P.M.
DAVIS……………………24 SW  AT  2:29 P.M. RMY 23
FASTEST MILE FOR YESTERDAY………………….16 WSW AT  1:06 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….15 SSW AT 11:44 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………16 WSW AT  1:05 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..10.4 WSW
ASOS…………………..10.8
DAVIS………………….10.4 SW [234 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.16
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….2.20  DEPARTURE……-1.06
ASOS…………..2.30
TOTAL PRECIPITATION FOR THE YEAR………..3.66  DEPARTURE……-3.95
ASOS…………..3.84

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE…….-0.5
TOTAL SNOWFALL FOR THE MONTH…………….0.6  DEPARTURE……-10.9
TOTAL SNOWFALL FOR THE SEASON…………..24.8  DEPARTURE……-19.8

PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/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

02/01  38/30/34/+8/0.01/T/…./..          14 WSW AERO 14 WSW RMY N/A
02/02  40/30/35/+9/0.00/0.0/…./..        18 W   AERO 18 WNW RMY 18
02/03  44/27/36/+10/0.00/0.0/…./..       28 W   AERO 28 W   RMY 28
02/04  44/33/39/+13/0.00/0.0/…./..       19 E   AERO 16 E   RMY 18
02/05  41/30/36/+10/0.00/0.0/…./..       20 NNW AERO 19 NNW RMY N/A
02/06  31/30/34/+8/0.00/0.0/…./..        29 E   AERO 28 E   RMY 27
02/07  53/25/39/+12/…./0.1/…./..       71 WSW AERO 71 SSW RMY 73
02/08  33/20/27/0/T/T/…./..              46 W   AERO 44 W   RMY 44
02/09  33/15/24/-3/T/T/…./..             30 SSE AERO 29 SSE RMY N/A
02/10  42/33/38/+11/…./0.0/…./..       39 SSW AERO 39 SSW RMY 39
02/11  40/36/38/+11/…./0.0/…./..       24 W   AERO 23 W   RMY N/A
02/12  41/30/36/+9/0.00/0.0/…./..        37 W   AERO 36 W   RMY N/A
02/13  35/31/34/+6/.00/0.0/…./..         29 SSW AERO 29 SSW RMY N/A
02/14  33/8/21/-7/0.00/0.0/…./..         32 WNW AERO 32 NW  RMY 34
02/15  27/4/16/-12/0.00/0.0/…./..        31 SSW AERO 31 SSW RMY N/A
02/16  40/23/32/+4/0.00/0.0/…./..        38 SW  AERO 38 SW  RMY N/A
02/17  44/28/36/+8/0.00/0.0/…./..        25 WNW AERO 24 WNW RMY 24
02/18  37/27/32/+3/0.31/T/…./..          26 SE  AERO 26 SE  RMY N/A
02/19  42/25/34/+5/0.00/0.0/…./..        45 W   AERO 46 W   RMY 44
02/20  31/18/25/-4/0.00/0.0/…./..        32 W   AERO 32 W   RMY N/A
02/21  30/11/21/-8/0.00/0.0/…./..        24 NNW AERO 21 N   RMY N/A
02/22  44/23/34/+5/0.00/0.0/…./..        26 W   AERO 24 W   RMY 27
02/23  53/30/42/+12/0.00/0.0/…./..       21 SW  AERO 22 WSW RMY 23

02/24 The low since midnight is 323F, daily normal minimum is 21F

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

RECORDS FOR FEBRUARY 24
HIGH 71F IN 2017
LOW -11F IN 1894
PRECIP 3.10 INCHES IN 1969
SNOWFALL 27.4 INCHES IN 1969 [HIGHEST CALENDAR DAY AMOUNT ON RECORD] PEAK GUST 63 MPH NE IN 1998

RECORDS FOR FEBRUARY 25
HIGH 68F IN 2017
LOW -10F IN 1894
PRECIP 2.40 INCHES IN 1981
SNOWFALL 13.6 INCHES IN 1966
PEAK GUST 76 MPH S IN 2016

TODAY’S REPORT PREPARED BY: Matt Douglas