Friday, January 24, 2020

| January 24, 2020 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, JANUARY 24, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

FILTERED SUNSHINE AND MILD TEMPERATURES
ATOP GREAT BLUE HILL….

We observed persistent haze throughout the day resulting
in a max visibility of only 35 miles. A light north-northeasterly
flow resulted in mild temperatures peaking so far at 43 degrees,
thus the snow depth fell to 1 inch by the 1PM observation.
Sunshine was radiant at times and obscured at others as mid and
high altitude clouds filtered in and out of our region.

The high so far today is 43F, 9 degrees above the normal
high of 34F. The low since midnight is 31F, 14F degrees above
the normal low of 17F.

Today’s Observations:

7 A.M.
Weather: Broken Altocumulus and Altostratus; Few Cirrus
Temperature: 31F; Dew Point: 21F; Wind: NE at 9 kts
Sea-level pressure: 30.38 ins. Hg, rising unsteadily
Visibility: 35 miles, hazy
6-hr Max temp: 34F
6-hr Min temp: 31F
24-hr Precip:  0.00 ins.
24-hr Snowfall: 0.0 ins.
Snow depth: 2 ins.
BHO SA 1155 E140 BKN 35 287/31/21/0409/038/ FEW CI ALQDS
HAZY/ 8/074 4/002 52016 10034 20031

10 A.M.
Weather: Scattered Cirrus; Few Altostratus SW-NW; Few
Cirrostratus NE-SW
Temperature: 38F; Dew Point: 27F; Wind: NNE at 6 kts
Sea-level pressure: 30.44 ins. Hg, rising then falling
Visibility: 35 miles, hazy
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 220 SCT 35 307/38/27/0206/044/ FEW AS SW-NW
FEW CS NE-SW HAZY/ 8/071 51020

1 P.M.
Weather: Broken Cirrus, Few Stratus Fractus NW-NE, Few
Altocumulus and Altostratus
Temperature: 43F; Dew Point: 33F; Wind: NNE at 9 kts
Wind: Light and variable
Sea-level pressure: 30.42 ins. Hg, steady then falling
Visibility: 35 miles
6-hr Max temp: 43F
6-hr Min temp: 31F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
Snow depth: 1 ins
BHO SA 1755 E250 BKN 35 300/43/33/0309/042/ FEW SF NW-NE
FEW AC/AS HAZY WND L/V/ 8/792 4/001 58007 10043 20031

SUMMARY FOR THURSDAY, JANUARY 23, 2020

TEMPERATURE (DEGREES F)
MAX…..46   NORMAL…..34
MIN…..26   NORMAL…..17
MEAN….36   NORMAL…..25

DEPARTURE FROM 30-YEAR NORMAL…………………+11
TOTAL DEPARTURE FOR THE MONTH………………..+166 [+7.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………29  DEPARTURE…… -11
TOTAL HEATING UNITS FOR THE MONTH…………..743  DEPARTURE……-166
TOTAL HEATING UNITS FOR THE SEASON…………2994  DEPARTURE……-219
TOTAL HEATING UNITS LAST SEASON TO DATE…….3188  DEPARTURE……-194

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..21 SW  AT  11:42 A.M.
AERO…………………….20 SW  AT   7:01 A.M.
ASOS…………………….20 SW  AT   6:54 A.M.
DAVIS……………………20 WSW AT   7:04 A.M. RMY 19
FASTEST MILE FOR YESTERDAY………………….16 SW  AT   6:59 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….16 SW  AT   7:11 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………16 SW  AT   6:59 A.M.
AVERAGE WIND SPEED AND DIRECTION……………10.5 SW
ASOS……………………11.0
DAVIS…………………..10.6 WSW [237 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.14
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.89  DEPARTURE……-2.37
ASOS…………..0.92
TOTAL PRECIPITATION FOR THE YEAR………..0.89  DEPARTURE……-2.37
ASOS…………..0.92

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……… 0.0  DEPARTURE…….-0.5
TOTAL SNOWFALL FOR THE MONTH…………… 4.2  DEPARTURE…….-8.6
TOTAL SNOWFALL FOR THE SEASON…………..24.2  DEPARTURE…….-4.6

PRELIMINARY CLIMATE SUMMARY FOR JANUARY 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

01/01  38/30/34/+7/…./0.0/…./..           39 W   AERO 38 W   RMY 41
01/02  46/29/38/+11/0.00/0.0/…./..          28 SW  AERO 28 SW  RMY 30
01/03  46/40/43/+17/0.00/0.0/…./..          21 SW  AERO 18 SW  RMY N/A
01/04  46/36/41/+15/…./0.0/…./..          16 NNW AERO 16 NNW RMY N/A
01/05  36/24/30/+4/…./0.5/…./..           43 NW  AERO 46 NW  RMY 43
01/06  33/23/28/+2/T/T/…./..                26 W   AERO 21 W   RMY N/A
01/07  38/29/34/+8/…./0.4/…/..            30 WSW AERO 28 WSW RMY N/A
01/08  39/22/31/+5/…./0.4/…/..            50 W   AERO 46 WNW RMY 47
01/09  28/16/22/-4/…./0.0/…/..            43 WNW AERO 40 WNW RMY N/A
01/10  48/23/36/11/T/…./0.0/…/..          37 SW  AERO 37 SW  RMY 39
01/11  65/46/56/+31/…./0.0/…/..           53 SSW AERO 53 SSW RMY N/A
01/12  68/36/52/+27/…./0.0/…/..           60 SSW AERO 62 SSW RMY N/A
01/13  39/31/35/+10/0.01/T/…/..             21 NE  AERO 20 NE  RMY N/A
01/14  38/31/35/+10/0.01/0.0/…/..           16 W   AERO 15 W   RMY N/A
01/15  48/35/42/+17/0.00/0.0/…/..           24 W   AERO 23 W   RMY 24
01/16  42/24/33/+8/0.06/T/…/..              54 W   AERO 52 W   RMY 59
01/17  24/10/17/-8/0.00/0.0/…./..           50 NW  AERO 48 NW  RMY N/A
01/18  28/8/18/-7/0.35/2.8/…./..            28 WSW AERO 24 ESE RMY N/A
01/19  40/21/31/+6/0.02/0.2/…./..           44 W   AERO 44 W   RMY 42
01/20  26/12/19/-6/0.00/0.0/…./..           33 NW  AERO 32 NW  RMY N/A
01/21  24/10/17/-8/0.00/0.0/…./..           22 NW  AERO 21 NW  RMY N/A
01/22  34/13/24/-1/0.00/0.0/…./..           16 SW  AERO 16 SW  RMY N/A
01/23  46/26/36/+11/0.00/0.0/…./..          21 SW  AERO 20 SW  RMY 19

1/24 The low since midnight is 31F, daily normal minimum is 17F

DAILY RECORDS FOR JANUARY

1/11/20: DAILY RECORD MAXIMUM TEMPERATURE OF 65F,
BREAKS PREVIOUS RECORD OF 60F SET IN 1975.

1/11/20: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 46F,
BREAKS PREVIOUS RECORD OF 40F SET IN 1983.

1/12/20: DAILY RECORD MAXIMUM TEMPERATURE OF 68F,
BREAKS PREVIOUS RECORD OF 60 SET IN 2018.
TIES HIGHEST MAXIMUM FOR JANUARY,
ADDITIONAL 68F ON 1/26/1950.

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

RECORDS FOR JANUARY 24
HIGH 60F IN 1967
LOW -12F IN 1907
PRECIP 2.04 INS. IN 1998
SNOWFALL 11.3 INS. IN 1935
PEAK GUST 82 MPH S IN 1996

RECORDS FOR JANUARY 25
HIGH 56F IN 2010
LOW -10F IN 1935
PRECIP 2.24 INS. IN 1979
SNOWFALL 12.5 INS. IN 1941
PEAK GUST 81 MPH WNW IN 1972

TODAY’S REPORT PREPARED BY: Ann Murphy and Andrew Swanson

Category: Daily Discussions

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