Friday, February 26, 2016

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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, FEBRUARY 26, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME

BAROMETRIC PRESSURE BOTTOMED OUT AT 29.09 INS. MSL
TEMPERATURES FALL FROM A HIGH OF 63F EARLY YESTERDAY
TO LOW OF 30F BY 7 A.M. THIS MORNING
WINDS CONTINUED GUSTY THROUGHOUT LAST NIGHT AS THE
DIRECTION VEERED FROM WSW TO W AND WNW THIS MORNING

The lowest barometer corrected to sea level was 29.09
Inches about mid-afternoon yesterday.
Yesterday morning’s big rain and windstorm included a
rise in temperature which reached 63F, the warmest
February reading here since 1997 was not, however
a record maximum for the date. The temperature
continued to fall overnight reaching 37F by midnight
and then down to 30F by 7 a.m. this morning.
However, the normal low is still down at 21 degrees!

The peak wind gust….
of 76 MPH from the south officially set a new record
for the date of 75 MPH. Several of our unofficial
gust recording systems recorded gusts of 80 to 84 MPH.

Peak gusts yesterday morning recorded by the various
anemometers at the Observatory:

Aerovane: 73 MPH S (corrected by 13%, 84 MPH uncorrected)
Richards: 84 MPH
Davis: 74 MPH S
420C: 76 MPH  (official manual record)
Maestro: 83 MPH
Merlin: 78 MPH S
RMY: missing (anomalous gust recorded at 110 MPH)

Today’s Observations:

7 A.M.
Weather: Scattered stratocumulus
Temperature: 30F; Dew Point: 19F; Wind: W at 15G27 kts,
Wind: Peak wind from W at 27 kts at 6:51 A.M.
Sea-level pressure: 29.55 ins. Hg, rising then more quickly
Visibility: 60 miles, distant light haze
6-hr Max temp: 36F
6-hr Min temp: 30F
24-hr precip: 0.05 in.
BHO SA 1155 38 SCT 60 007/30/19/2815G27/955/ LGT DSNT HZ
PK WND 2727/51/ WND 24V30/ 8/500 53035 MANUAL 70005 ASOS 70002
10036 20030

10 A.M.
Weather: Clear, few cumulus fractus and cumulus all quadrants
Temperature: 32F; Dew Point: 15F; Wind: W at 20G32 kts
Peak Wind: 32 knots W at 9:48 AM EST
Sea-level pressure: 29.62 ins. Hg, rising then more slowly
Visibility: 75 miles
BHO SA 1455 CLR 75 032/32/15/2920G32/962/ CUFRA/CU ALQDS
PK WND 2832/48/ WND 25V32 WND GRDLY VEERING/ 8/100 51025

1 P.M.
Weather: Clear, few small cumulus
Temperature: 37F; Dew Point: 11F; Wind: WNW at 17G34 kts
Peak Wind: 36 knots WNW @ 12:20 PM EST
Sea-level pressure: 29.65 ins. Hg, rising then more slowly
Visibility: 75 miles, light distant haze
6-hr Max temp: 38F
6-hr Min temp: 30F
BHO SA 1755 CLR 75 041/37/11/3017G34/965/ FEW SML CU
PK WND 3036/20 WND 26V33/ 8/100 51009 10038 20030

SUMMARY FOR THURSDAY, FEBRUARY 25, 2016

TEMPERATURE (DEGREES F)
MAX…..63   NORMAL…..39
MIN…..37   NORMAL…..21
MEAN….50   NORMAL…..30

DEPARTURE FROM 30-YEAR NORMAL……………………+20
TOTAL DEPARTURE FOR THE MONTH……………………+97 [+3.7 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..15   DEPARTURE………-20
TOTAL HEATING UNITS FOR THE MONTH………….835   DEPARTURE………-99
TOTAL HEATING UNITS FOR THE SEASON………..3577   DEPARTURE……..-887
TOTAL HEATING UNITS LAST SEASON TO DATE……4566   DIFFERENCE…….-989

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….76 S   AT 2:44 A.M.
ASOS……………………83 SSE AT 2:44 A.M.
DAVIS…………………..74 S   AT 2:36 A,M. RMY N/A
FASTEST MILE FOR YESTERDAY…………………N/A
MAXIMUM 2-MINUTE ASOS AVERAGE………………51 S   AT 3:02 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..50 S   AT 2:24 A.M.
AVERAGE WIND SPEED AND DIRECTION……………26.0 S
ASOS……………………24.6
DAVIS…………………..23.0 SSW [200 Deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.05  DEPARTURE……-0.11
ASOS…………..0.02
TOTAL PRECIPITATION FOR THE MONTH……….5.60  DEPARTURE……+2.02
ASOS…………..6.02
TOTAL PRECIPITATION FOR THE YEAR………..9.37 DEPARTURE…….+1.44
ASOS…………..9.96

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE…….-0.5
TOTAL SNOWFALL FOR THE MONTH……………22.5  DEPARTURE……+10.0
TOTAL SNOWFALL FOR THE SEASON…………..38.1  DEPARTURE…….-7.5

PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY 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

2/1   64/40/52/+26/0.00/0.0/305/51          36 WNW AERO 37 W   RMY 34
2/2   48/31/40/+14/0.00/0.0/602/100         23 NW  AERO 23 WNW RMY N/A
2/3   55/34/45/+19/0.80/0.0/000/00          55 SSE AERO 58 SSE RMY 53
2/4   55/39/47/+21/…./0.0/000/00          37 W   AERO 36 W   RMY 35
2/5   39/19/29/+3/…./12.5/000/00          37 NNW AERO 39 NNW RMY 35
2/6   35/17/26/0/0.00/0.0/532/87            25 SSW AERO 24 SSW RMY 23
2/7   43/26/35/+8/0.00/0.0/…/..           35 ENE AERO 35 ENE RMY N/A
2/8   36/16/26/-1/…./…/000/00           53 NE  AERO 55 NE  RMY 53
2/9   26/17/22/-5/…./…/000/00           21 N   AERO 22 N   RMY N/A
2/10  33/21/27/+0/0.01/0.0/…/..           23 W   AERO 23 W   RMY 21
2/11  26/7/17/-10/T/T/…/..                39 W   AERO 47 W   RMY 42
2/12  23/4/13/-14/0.00/0.0/…/..           31 WNW AERO 38 WNW RMY 21
2/13  21/-7/7/-21/0.00/0.0/…/..           41 W   AERO 46 WNW RMY 43
2/14  10/-14/-2/-30/0.00/0.0/632/100        33 WNW AERO 46 WNW RMY N/A
2/15  32/-2/15/-13/…./1.2/…/..          24 E   AERO 28 E   RMY N/A
2/16  55/32/44/+16/…./0.0/…/..          65 SSE AERO 69 SSE RMY 64
2/17  43/30/37/+9/0.00/0.0/…/..           33 W   AERO 35 W   RMY N/A
2/18  32/20/26/+3/0.00/0.0/…/..           25 NNW AERO 29 NW  RMY 25
2/19  39/16/28/-1/0.01/T/…/..             24 SSW AERO 26 SSW RMY N/A
2/20  58/31/45/+16/…./…/…/..          44 SSW AERO 44 SSW RMY 41
2/21  53/39/46/+17/0.00/0.0/…/..          39 WNW AERO 43 WNW RMY 39
2/22  45/29/37/+8/0.00/0.0/…/..           18 NW  AERO 20 NW  RMY 17
2/23  37/25/31/+1/…./T/…/..             26 E   AERO 26 E   RMY N/A
2/24  60/33/47/+17/…./0.0/000/00          60 S   AERO 66 S   RMY N/A
2/25  63/37/50/+15/…./0.0/…/..          76 S   AERO 84 S   RMY N/A

2/26  morning low temp. since midnight 30F; normal now 21F

DAILY RECORDS FOR FEBRUARY 2016

2/14/16: **NEW DAILY RECORD LOW MINIMUM TEMPERATURE OF -14F,
SURPASSING PREVIOUS RECORD OF -8F SET IN 1979**

2/14/16: **TIED DAILY RECORD LOW MAXIMUM TEMPERATURE OF 10F,
MATCHING PREVIOUS RECORD OF 10F SET IN 1979**

2/25/16: **NEW DAILY RECORD PEAK WIND GUST OF 76 MPH S,
SURPASSING PREVIOUS RECORD OF 75 MPH S IN 1965**

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

RECORDS FOR FEBRUARY 26
HIGH 67F IN 1957
LOW -7F IN 1928
PRECIP 2.24 INCHES IN 1979
SNOWFALL 11.1 INCHES IN 1933
PEAK GUST 66 MPH W IN 1961

RECORDS FOR FEBRUARY 27
HIGH 61F IN 1976
LOW -8F IN 1900
PRECIP 1.43 INCHES IN 2013
SNOWFALL 6.0 INCHES IN 1922
PEAK GUST 67 MPH W IN 1985

TODAY’S REPORT PREPARED BY: Robert Skilling