Thursday, March 5, 2020

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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, MARCH 5, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

A BLUEBIRD DAY WITH GREAT VISIBILITY AND
ALMOST CLEAR SKIES….

Today we observed a few passing clouds, and a
visibility of 75 miles or higher. Wind today
was strongest around 11 A.M., reaching 32 mph.
The max gust for yesterday was 56 miles an
hour, around 3:15 P.M.

Temperatures remain milder than normal, and
both Ponkapoag and Houghton’s Pond are unfrozen.
The high so far today is 50F, this is 9 degrees
above the normal high of 41F. The low since
midnight is 32F, 9 degrees above the normal
low of 23F.

PRELIMINARY STATS FOR FEBRUARY 2020

TEMPERATURE, Deg. F
Avg. Max. 40.7 [+3.9] Avg. Min. 25.9 [+6.7] Mean      33.3 [+5.4] 24-hour corrected mean: 33.3
Max. for month: 60F on the 24th
Min. for month: 4F on the 15th

HEATING DEGREE DAYS
Total heating units:    911 [-164] Total for the season:  4140 [-345] Total for last season: 4485

PRECIPITATION, Inches
Total: 3.20 [-0.87] Greatest in 24 hrs: N/A

SNOWFALL, Inches
Total: 0.6 [-13.3] Greatest in 24 hrs: 0.5 ins. on the 13th

WIND, mph
Avg. uncorrected wind speed: 11.5 mph
Avg. corrected wind speed:   12.0 mph
Prevailing wind direction:   W [24%] Peak gust and direction:     71 WSW on the 7th

SUNSHINE:
Campbell-Stokes card minutes: N/A
Astronomical total minutes: N/A

Today’s Observations:

7 A.M.
Weather: Few cumulus
Temperature: 33F; Dew Point: 22F; Relative Humidity: 63%
Sea-level pressure: 29.97 ins. Hg: rising rapidly
Visibility: 80 miles
6-hr Max temp: 37F
6-hr Min temp: 32F
24-hr Precip:  0.00 ins.
24-hr Snowfall: 0.0 ins.
BHO SA 1155 CLR 80 148/33/22/2909G18/997/ FEW CU ALQDS/
8/100 51037 10037 20032

10 A.M.
Weather: Few cumulus
Temperature: 43F; Dew Point: 21F; Relative Humidity: 40%
Wind: WNW at 15G25 kts, Peak wind: 31 MPH (27 kts) NW at
9:33 A.M.
Sea-level pressure: 29.99 ins. Hg: rising steadily
Visibility: 75 miles
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 CLR 75 154/43/21/3015G25/999/ FEW CU ALQDS
PK WND 3127/33/ 8/100 50006

1 P.M.
Weather: Few cumulus
Temperature: 49F; Dew Point: 22F; Relative Humidity: 34%
Wind: WNW at 6G18 kts, Peak wind: 32 MPH (28 kts) NW at
10:41 A.M.
Sea-level pressure: 30.01 ins. Hg: rising steadily
Visibility: 80 miles
6-hr Max temp: 50F
6-hr Min temp: 33F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
BHO SA 1755 CLR 80 160/49/22/2906G18/001/ FEW CU ALQDS
PK WND 3228/1541/ 8/100 50006 10050 20033

SUMMARY FOR WEDNESDAY, MARCH 4, 2020

TEMPERATURE (DEGREES F)
MAX…..50   NORMAL…..41
MIN…..38   NORMAL…..23
MEAN….44   NORMAL…..32

DEPARTURE FROM 30-YEAR NORMAL……………….+12
TOTAL DEPARTURE FOR THE MONTH……………….+35 [+8.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………21  DEPARTURE…….-12
TOTAL HEATING UNITS FOR THE MONTH……………99  DEPARTURE…….-35
TOTAL HEATING UNITS FOR THE SEASON…………4239  DEPARTURE……-463
TOTAL HEATING UNITS LAST SEASON TO DATE…….4628  DEPARTURE……-389

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..56 W   AT  3:15 P.M.
AERO…………………….56 W   AT  3:17 P.M.
ASOS…………………….55 W   AT  3:14 P.M.
DAVIS……………………56 W   AT  3:13 P.M. RMY 58
FASTEST MILE FOR YESTERDAY………………….43 W   AT  3:12 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….39 W   AT  3:16 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………43 W   AT  3:16 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..22.1 W
ASOS…………………..20.8
DAVIS………………….22.4 W [276 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.17
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.09  DEPARTURE……-0.60
ASOS…………..0.11
TOTAL PRECIPITATION FOR THE YEAR………..4.75  DEPARTURE……-4.36
ASOS…………..5.02

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE…….-0.5
TOTAL SNOWFALL FOR THE MONTH…………..TRACE  DEPARTURE…….-2.0
TOTAL SNOWFALL FOR THE SEASON…………..24.8  DEPARTURE……-24.3

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/+6/0.00/0.5/…./..        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  60/32/46/+16/0.00/0.0/…./..       29 S   AERO 29 SSW RMY 31
02/25  53/40/47/+17/…./0.0/…./..       17 NE  AERO 18 ENE RMY 17
02/26  45/39/42/+12/…/0.0/…./..        23 ENE AERO 24 E   RMY N/A
02/27  49/27/38/+7/0.00/0.0/…./..        51 W   AERO 53 W   RMY 52
02/28  36/25/31/0/0.00/0.0/…./…        38 SW  AERO 38 SW  RMY 36
02/29  35/19/27/-4/0.00/0.0/…./..        32 W   AERO 32 W   RMY 34

PRELIMINARY CLIMATE SUMMARY FOR MARCH 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

03/01  33/15/24/-7/0.00/0.0/…./..        28 WNW AERO 28 WNW RMY 27
03/02  52/24/38/+7/T/T/…./..             40 S   AERO 39 S   RMY 41
03/03  64/45/55/+23/…./…/…/..        30 S   AERO 30 S   RMY N/A
03/04  50/38/44/+12/…./…/…/..        56 W   AERO 56 W   RMY 58

03/05 The low since midnight is 32F, daily normal minimum is 23F

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

RECORDS FOR MARCH 5
HIGH 64 IN 1979
LOW -2 IN 1948
PRECIP 1.76 INS. IN 2001
SNOWFALL 13.0 INS. IN 1891
PEAK GUST 76e MPH WNW IN 1971

RECORDS FOR MARCH 6
HIGH 66 IN 1894
LOW 3 IN 1948, 2007
PRECIP 1.85 INS. IN 2001
SNOWFALL 15.5 INS. IN 2001
PEAK GUST 82 MPH S IN 1959

TODAY’S REPORT PREPARED BY: Benjamin Turner